首页 > 最新文献

Waste Management Bulletin最新文献

英文 中文
Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels 从橘子皮中提取的新型可再生吸附剂对水中砷的去除效果优化
Pub Date : 2025-06-01 Epub Date: 2025-02-28 DOI: 10.1016/j.wmb.2025.02.006
Roya Sadat Neisan , Noori M. Cata Saady , Carlos Bazan , Sohrab Zendehboudi
This study developed activated carbon from orange peels (ACOP) and modified ACOP with titanium dioxide (TiO2) (ACOP-TiO2), focusing on optimizing the adsorption capacity of ACOP-TiO2 for arsenic removal from water. The developed adsorbent (ACOP-TiO2) was prepared and characterized by Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), surface area analysis, and elemental analysis. The Brunauer-Emmett-Teller (BET) test demonstrated that the modification increased the surface area of ACOP-TiO2 by 2.55 times greater than ACOP. Adsorption experiments were conducted using synthetic aqueous solutions of arsenic (As(V)), and the response surface methodology (RSM) incorporating central composite design (CCD) was employed for experimental optimization. The results indicated that ACOP-TiO2 demonstrated efficient arsenic removal, with optimal pH identified at approximately 4.2. Increasing adsorbent dosage (0.025–0.4 g in 50 mL solution, corresponding to 0.5–8 g L-1) positively influenced adsorption efficiency, while initial arsenic concentration (10–60 mg L-1) directly correlated with adsorbent capacity, with a predicted optimum concentration of 50 mg L-1. Contact time (0.4–6 h) exhibited minimal impact on adsorbent capacity within the experimental timeframe. Under the conditions of pH 4.2, an initial arsenic concentration of 50 mg L-1, an adsorbent dose of 3.3 g L-1 (0.165 g adsorbent/50 mL solution), and a contact time of 4.8 h, the maximum adsorbent capacity in arsenic removal for ACOP-TiO2 was 10.91 mg g−1. The intra-particle diffusion kinetic model and Temkin isotherm best described arsenic adsorption onto ACOP-TiO2. This research contributes valuable insights into utilizing agricultural waste for water treatment, offering a sustainable and economical solution for arsenic removal.
本研究制备了桔皮活性炭(ACOP)和二氧化钛(TiO2)改性活性炭(ACOP-TiO2),重点研究了ACOP-TiO2对水中砷的吸附能力。制备了ACOP-TiO2吸附剂,并通过扫描电镜(SEM)、能谱分析(EDS)、傅里叶变换红外光谱(FTIR)、x射线衍射(XRD)、表面积分析和元素分析对其进行了表征。brunauer - emmet - teller (BET)测试表明,改性后的ACOP- tio2比ACOP增加了2.55倍的表面积。采用砷(As(V))的合成水溶液进行吸附实验,采用响应面法(RSM)结合中心复合设计(CCD)对实验进行优化。结果表明,ACOP-TiO2具有较好的除砷效果,最佳pH约为4.2。增加吸附剂用量(0.025 ~ 0.4 g / 50 mL,对应0.5 ~ 8 g L-1)对吸附效率有正向影响,而初始砷浓度(10 ~ 60 mg L-1)与吸附剂容量直接相关,预测最佳浓度为50 mg L-1。在实验时间范围内,接触时间(0.4 ~ 6 h)对吸附剂容量的影响最小。在pH 4.2、初始砷浓度为50 mg L-1、吸附剂剂量为3.3 g L-1 (0.165 g吸附剂/50 mL溶液)、接触时间为4.8 h的条件下,ACOP-TiO2的最大除砷量为10.91 mg g -1。颗粒内扩散动力学模型和Temkin等温线最能描述ACOP-TiO2对砷的吸附。该研究为利用农业废水进行水处理提供了有价值的见解,为除砷提供了可持续和经济的解决方案。
{"title":"Optimization of arsenic removal from water using novel renewable adsorbents derived from orange peels","authors":"Roya Sadat Neisan ,&nbsp;Noori M. Cata Saady ,&nbsp;Carlos Bazan ,&nbsp;Sohrab Zendehboudi","doi":"10.1016/j.wmb.2025.02.006","DOIUrl":"10.1016/j.wmb.2025.02.006","url":null,"abstract":"<div><div>This study developed activated carbon from orange peels (ACOP) and modified ACOP with titanium dioxide (TiO<sub>2</sub>) (ACOP-TiO<sub>2</sub>), focusing on optimizing the adsorption capacity of ACOP-TiO<sub>2</sub> for arsenic removal from water. The developed adsorbent (ACOP-TiO<sub>2</sub>) was prepared and characterized by Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), surface area analysis, and elemental analysis. The Brunauer-Emmett-Teller (BET) test demonstrated that the modification increased the surface area of ACOP-TiO<sub>2</sub> by 2.55 times greater than ACOP. Adsorption experiments were conducted using synthetic aqueous solutions of arsenic (As(V)), and the response surface methodology (RSM) incorporating central composite design (CCD) was employed for experimental optimization. The results indicated that ACOP-TiO<sub>2</sub> demonstrated efficient arsenic removal, with optimal pH identified at approximately 4.2. Increasing adsorbent dosage (0.025–0.4 g in 50 mL solution, corresponding to 0.5–8 g L<sup>-1</sup>) positively influenced adsorption efficiency, while initial arsenic concentration (10–60 mg L<sup>-1</sup>) directly correlated with adsorbent capacity, with a predicted optimum concentration of 50 mg L<sup>-1</sup>. Contact time (0.4–6 h) exhibited minimal impact on adsorbent capacity within the experimental timeframe. Under the conditions of pH 4.2, an initial arsenic concentration of 50 mg L<sup>-1</sup>, an adsorbent dose of 3.3 g L<sup>-1</sup> (0.165 g adsorbent/50 mL solution), and a contact time of 4.8 h, the maximum adsorbent capacity in arsenic removal for ACOP-TiO<sub>2</sub> was 10.91 mg g<sup>−1</sup>. The intra-particle diffusion kinetic model and Temkin isotherm best described arsenic adsorption onto ACOP-TiO<sub>2</sub>. This research contributes valuable insights into utilizing agricultural waste for water treatment, offering a sustainable and economical solution for arsenic removal.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 2","pages":"Pages 21-35"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Al-anodizing waste as a supplementary cementitious material for 3D-printed Portland cement 铝阳极氧化废料作为3d打印硅酸盐水泥的补充胶凝材料
Pub Date : 2025-06-01 Epub Date: 2025-03-04 DOI: 10.1016/j.wmb.2025.03.001
Jairon Gomes da Silveira Júnior , Rafael Dors Sakata , Lucas Onghero , Paulo Ricardo de Matos , Erich David Rodríguez , Lisandro Simão , Antonio Pedro Novaes de Oliveira , Ruan Carlos de Araújo Moura , Carlos Eduardo Maduro de Campos , José Renato de Castro Pessôa , Marcelo Tramontin Souza
This study investigates the use of Al-anodizing waste (AAW), a byproduct of the anodizing process for aluminum and its alloys, in cement composites designed for 3D printing applications. For cementitious materials to be suitable for 3D printing, they must maintain adequate stability to support overlapping layers while also exhibiting sufficient flowability and open time for effective pumping. The incorporation of AAW aims to improve the rheological properties of these mixtures, enhancing both their open time and buildability. To evaluate the potential of AAW in 3D printing cement composites, a comprehensive approach was adopted. This included rheological analysis, flow table testing, investigations into buildability, and assessments of mechanical performance. Additional techniques, such as isothermal calorimetry and in situ X-ray diffraction, were employed to examine the effect of AAW on the hydration kinetics of cement pastes. The findings highlighted several advantages of incorporating AAW into cement-based formulations, such as improved buildability, quick adjustments in rheological properties, prolonged open times, enhanced mechanical performance, cost-effectiveness, and increased sustainability by transforming a commonly discarded material into a valuable resource for civil construction.
本研究调查了铝阳极氧化废料(AAW)在3D打印水泥复合材料中的应用,AAW是铝及其合金阳极氧化过程的副产品。对于适合3D打印的胶凝材料,它们必须保持足够的稳定性以支持重叠层,同时还具有足够的流动性和打开时间以进行有效泵送。加入AAW的目的是改善这些混合物的流变特性,提高它们的打开时间和可建造性。为了评估AAW在3D打印水泥复合材料中的潜力,采用了一种综合方法。这包括流变分析、流表测试、可建造性调查和机械性能评估。采用等温量热法和原位x射线衍射等技术,研究了AAW对水泥浆体水化动力学的影响。研究结果强调了将AAW加入水泥基配方的几个优点,例如改善可建造性、快速调整流变特性、延长打开时间、增强机械性能、成本效益,并通过将一种常见的废弃材料转化为民用建筑的宝贵资源而提高可持续性。
{"title":"Al-anodizing waste as a supplementary cementitious material for 3D-printed Portland cement","authors":"Jairon Gomes da Silveira Júnior ,&nbsp;Rafael Dors Sakata ,&nbsp;Lucas Onghero ,&nbsp;Paulo Ricardo de Matos ,&nbsp;Erich David Rodríguez ,&nbsp;Lisandro Simão ,&nbsp;Antonio Pedro Novaes de Oliveira ,&nbsp;Ruan Carlos de Araújo Moura ,&nbsp;Carlos Eduardo Maduro de Campos ,&nbsp;José Renato de Castro Pessôa ,&nbsp;Marcelo Tramontin Souza","doi":"10.1016/j.wmb.2025.03.001","DOIUrl":"10.1016/j.wmb.2025.03.001","url":null,"abstract":"<div><div>This study investigates the use of Al-anodizing waste (AAW), a byproduct of the anodizing process for aluminum and its alloys, in cement composites designed for 3D printing applications. For cementitious materials to be suitable for 3D printing, they must maintain adequate stability to support overlapping layers while also exhibiting sufficient flowability and open time for effective pumping. The incorporation of AAW aims to improve the rheological properties of these mixtures, enhancing both their open time and buildability. To evaluate the potential of AAW in 3D printing cement composites, a comprehensive approach was adopted. This included rheological analysis, flow table testing, investigations into buildability, and assessments of mechanical performance. Additional techniques, such as isothermal calorimetry and in situ X-ray diffraction, were employed to examine the effect of AAW on the hydration kinetics of cement pastes. The findings highlighted several advantages of incorporating AAW into cement-based formulations, such as improved buildability, quick adjustments in rheological properties, prolonged open times, enhanced mechanical performance, cost-effectiveness, and increased sustainability by transforming a commonly discarded material into a valuable resource for civil construction.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 2","pages":"Pages 10-20"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid on-site maturity and stability assessment of sewage sludge compost by mathematical treatment of UV and fluorescence spectroscopic data 通过紫外和荧光光谱数据的数学处理快速评价污泥堆肥的现场成熟度和稳定性
Pub Date : 2025-06-01 Epub Date: 2025-02-28 DOI: 10.1016/j.wmb.2025.02.007
Roland Redon , Madi Guirema Abaker , Michel Raynaud , Pascale Prudent , Stéphane Mounier , Christian Martino , Didier Gori , Carine Demelas , Frédéric Théraulaz
Co-composting of sewage sludge with green waste is the main way of valorisation of organic wastes. The compost maturation process leads to production of humified and stabilized organic matter well-used for soil amendment due to its soil structuring qualities and nutrient richness. That is why the knowledge of product quality in terms of organic matter stability and maturity of compost is imperative. Unfortunately, there is a lack of quick and easy solutions available for composting plant managers who usually need complex and time consuming laboratory measurements for determination of biological or chemical parameters, and more robust on-site methods. Compost evolution monitoring needs actual determination of several biological and physico-chemical parameters as the C/N ratio, the ISMO (Organic Matter Stability Index), related to organic matter stability, and the germination test related to compost maturity. The aim of this work is the estimation of these three parameters using a Partial Least Squares regression (PLS1) based on UV and fluorescence spectroscopic data and pH from compost water extracts at various steps of composting process, ending to a mathematical linear model. Results show average relative prediction errors of 14.76 %, 16.35 % and 15.38 % for C/N ratio, ISMO and germination test results, respectively. These satisfactory results confirm potentiality of this approach for a rapid and simple on-site estimation of the organic matter stabilization and compost maturation, for qualification of the end-product before its use.
污泥与绿色废弃物共堆肥是有机废弃物资源化利用的主要途径。由于堆肥的土壤结构和丰富的养分,其成熟过程可以产生腐殖质和稳定的有机质,很好地用于土壤改良剂。这就是为什么在有机物质稳定性和堆肥成熟度方面的产品质量知识是必要的。不幸的是,对于堆肥工厂的管理人员来说,通常需要复杂和耗时的实验室测量来确定生物或化学参数,以及更可靠的现场方法,缺乏快速简便的解决方案。堆肥演变监测需要实际测定与有机质稳定性相关的C/N比、有机质稳定指数(ISMO)和与堆肥成熟度相关的发芽试验等几个生物和理化参数。这项工作的目的是使用偏最小二乘回归(PLS1)来估计这三个参数,该回归基于堆肥过程中各个步骤的紫外和荧光光谱数据以及堆肥水提取物的pH值,最终得到一个数学线性模型。结果表明,C/N、ISMO和发芽试验结果的平均相对预测误差分别为14.76%、16.35%和15.38%。这些令人满意的结果证实了这种方法的潜力,用于快速和简单的现场评估有机质稳定性和堆肥成熟度,用于最终产品使用前的鉴定。
{"title":"Rapid on-site maturity and stability assessment of sewage sludge compost by mathematical treatment of UV and fluorescence spectroscopic data","authors":"Roland Redon ,&nbsp;Madi Guirema Abaker ,&nbsp;Michel Raynaud ,&nbsp;Pascale Prudent ,&nbsp;Stéphane Mounier ,&nbsp;Christian Martino ,&nbsp;Didier Gori ,&nbsp;Carine Demelas ,&nbsp;Frédéric Théraulaz","doi":"10.1016/j.wmb.2025.02.007","DOIUrl":"10.1016/j.wmb.2025.02.007","url":null,"abstract":"<div><div>Co-composting of sewage sludge with green waste is the main way of valorisation of organic wastes. The compost maturation process leads to production of humified and stabilized organic matter well-used for soil amendment due to its soil structuring qualities and nutrient richness. That is why the knowledge of product quality in terms of organic matter stability and maturity of compost is imperative. Unfortunately, there is a lack of quick and easy solutions available for composting plant managers who usually need complex and time consuming laboratory measurements for determination of biological or chemical parameters, and more robust on-site methods<em>.</em> Compost evolution monitoring needs actual determination of several biological and physico-chemical parameters as the C/N ratio, the ISMO (Organic Matter Stability Index), related to organic matter stability, and the germination test related to compost maturity. The aim of this work is the estimation of these three parameters using a Partial Least Squares regression (PLS1) based on UV and fluorescence spectroscopic data and pH from compost water extracts at various steps of composting process, ending to a mathematical linear model. Results show average relative prediction errors of 14.76 %, 16.35 % and 15.38 % for C/N ratio, ISMO and germination test results, respectively. These satisfactory results confirm potentiality of this approach for a rapid and simple on-site estimation of the organic matter stabilization and compost maturation, for qualification of the end-product before its use.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 2","pages":"Pages 1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A review on the operational parameters and degradation kinetics used in anaerobic co-digestion of tannery residues 革渣厌氧共消化的操作参数及降解动力学研究进展
Pub Date : 2025-04-01 Epub Date: 2025-01-27 DOI: 10.1016/j.wmb.2025.01.006
Shilpy Rani Basak, Samin Azhan Chowdhury, Rafiuzzaman Khan, Ahmad Hasan Nury, Md. Jahir Bin Alam, Md. Imran Kabir
Tannery residues possess the potential to produce biogas through anaerobic co-digestion processes. Research related to anaerobic co-digestion of food wastes and easily biodegradable wastes is ongoing and a vast advancement has been observed already to reclaim biogas as recycled energy. However, a review on the co-digestion of tannery residues and their potentiality to produce recycled energy has been initiated very limitedly. As these residues are more persistent compared to the biodegradable ones, their conversion to a simpler and safer form is highly required. To fill in this gap, an approach to review the co-digestion of tannery residues and its potential degradation kinetics has been initiated here so that the prime co-digestion- and kinetic- parameters are evaluated. Moreover, four generic equations with 45 parameters (variable and constant) have been developed based on the existing literature to explain the bacterial growth with substrate- and product- inhibition as well as substrate degradation. This review outcome will lead to the biochemical modelling of the degradation of tannery residues for various co-digestion elements. It will lead the modelers to find not only the potential parameters to be considered during co-digestion but also the effective initiations of related experiments.
制革厂残留物具有通过厌氧共消化过程产生沼气的潜力。与食物垃圾和易生物降解垃圾的厌氧共消化相关的研究正在进行中,并且已经观察到将沼气作为再生能源的巨大进展。然而,对制革残留物的共消化及其产生再生能源的潜力的研究非常有限。由于这些残留物比可生物降解的残留物更持久,因此迫切需要将它们转化为更简单、更安全的形式。为了填补这一空白,本文提出了一种方法来回顾制革残留物的共消化及其潜在的降解动力学,以便评估主要的共消化和动力学参数。此外,在现有文献的基础上,建立了四个具有45个参数(变量和常数)的通用方程,以解释细菌在底物和产物抑制下的生长以及底物降解。这一综述结果将导致各种共消化元素的制革残留物降解的生化建模。它将引导建模者不仅找到在共消化过程中需要考虑的潜在参数,而且找到相关实验的有效启动。
{"title":"A review on the operational parameters and degradation kinetics used in anaerobic co-digestion of tannery residues","authors":"Shilpy Rani Basak,&nbsp;Samin Azhan Chowdhury,&nbsp;Rafiuzzaman Khan,&nbsp;Ahmad Hasan Nury,&nbsp;Md. Jahir Bin Alam,&nbsp;Md. Imran Kabir","doi":"10.1016/j.wmb.2025.01.006","DOIUrl":"10.1016/j.wmb.2025.01.006","url":null,"abstract":"<div><div>Tannery residues possess the potential to produce biogas through anaerobic co-digestion processes. Research related to anaerobic co-digestion of food wastes and easily biodegradable wastes is ongoing and a vast advancement has been observed already to reclaim biogas as recycled energy. However, a review on the co-digestion of tannery residues and their potentiality to produce recycled energy has been initiated very limitedly. As these residues are more persistent compared to the biodegradable ones, their conversion to a simpler and safer form is highly required. To fill in this gap, an approach to review the co-digestion of tannery residues and its potential degradation kinetics has been initiated here so that the prime co-digestion- and kinetic- parameters are evaluated. Moreover, four generic equations with 45 parameters (variable and constant) have been developed based on the existing literature to explain the bacterial growth with substrate- and product- inhibition as well as substrate degradation. This review outcome will lead to the biochemical modelling of the degradation of tannery residues for various co-digestion elements. It will lead the modelers to find not only the potential parameters to be considered during co-digestion but also the effective initiations of related experiments.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 271-292"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143273104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanistic impact of sodium nitrate on the characteristics of MWCNTS oxidation and potential application on methylene blue adsorption from wastewater 硝酸钠对MWCNTS氧化特性的机理影响及其在废水中亚甲基蓝吸附中的潜在应用
Pub Date : 2025-04-01 Epub Date: 2025-01-23 DOI: 10.1016/j.wmb.2025.01.005
Parul Dwivedi , Ashwani Kumar Rathore , Deepak Srivastava , R.P. Vijayakumar
Effect of oxidizing agents on plastic waste derived multi-walled carbon nanotubes (MWCNTs) was investigated in this study. It was investigated whether a single oxidizing agent is sufficient for the desired oxidation or if the use of multiple agents is required. Typically, the modified Hummers method employs several oxidizing agents such as H2SO4, NaNO3, H2O2, and KMnO4, contributing to increased production costs and posing challenges for scalability. The investigation focused on the presence or absence of NaNO3 while altering the ratio of KMnO4 and reaction time. The synthesized materials were analysed using UV–VIS spectrophotometry and FTIR. The shifted peaks of the XRD pattern were analysed for the surface modification of the MWCNTOs surfaces with the degree of oxidation. Surface morphology of the samples was obtained using FESEM and found comparable changes with the degree of oxidation. The percentage of Methylene Blue (MB) dye removal was examined using oxidized samples, and the impact of oxidation on the efficacy of dye adsorption was investigated. The results showed that maximum 79% removal occurred for lowest oxidised MWCNTs compared to others as maximum oxidation leads to agglomeration of particles. The Freundlich isotherm and pseudo 1st order reaction order models exhibited optimal compatibility with pristine MWCNTs. In contrast, Langmuir and pseudo 2nd order kinetics models demonstrated superior fitment with oxidized MWCNTs. This suggests a transition in the adsorption phenomenon from physisorption to chemisorption.
研究了氧化剂对塑料废弃物衍生的多壁碳纳米管(MWCNTs)的影响。研究了单一氧化剂是否足以达到所需的氧化效果,或者是否需要使用多种氧化剂。通常,改进的Hummers方法使用了几种氧化剂,如H2SO4、NaNO3、H2O2和KMnO4,这会增加生产成本,并对可扩展性构成挑战。研究了纳米3的存在与否对KMnO4比例和反应时间的影响。用紫外-可见分光光度法和红外光谱法对合成材料进行了分析。分析了MWCNTOs表面随氧化程度变化的XRD谱移峰。使用FESEM获得样品的表面形貌,并发现与氧化程度相当的变化。考察了氧化样品对亚甲基蓝(MB)染料的去除率,并考察了氧化对染料吸附效果的影响。结果表明,与其他MWCNTs相比,氧化程度最低的MWCNTs的去除率最高达79%,因为最大程度的氧化会导致颗粒团聚。Freundlich等温线和伪一级反应模型与原始MWCNTs的相容性最佳。相比之下,Langmuir和伪二阶动力学模型表明氧化MWCNTs具有更好的拟合性。这表明了吸附现象从物理吸附到化学吸附的转变。
{"title":"Mechanistic impact of sodium nitrate on the characteristics of MWCNTS oxidation and potential application on methylene blue adsorption from wastewater","authors":"Parul Dwivedi ,&nbsp;Ashwani Kumar Rathore ,&nbsp;Deepak Srivastava ,&nbsp;R.P. Vijayakumar","doi":"10.1016/j.wmb.2025.01.005","DOIUrl":"10.1016/j.wmb.2025.01.005","url":null,"abstract":"<div><div>Effect of oxidizing agents on plastic waste derived multi-walled carbon nanotubes (MWCNTs) was investigated in this study. It was investigated whether a single oxidizing agent is sufficient for the desired oxidation or if the use of multiple agents is required. Typically, the modified Hummers method employs several oxidizing agents such as H<sub>2</sub>SO<sub>4</sub>, NaNO<sub>3</sub>, H<sub>2</sub>O<sub>2</sub>, and KMnO<sub>4</sub>, contributing to increased production costs and posing challenges for scalability. The investigation focused on the presence or absence of NaNO<sub>3</sub> while altering the ratio of KMnO<sub>4</sub> and reaction time. The synthesized materials were analysed using UV–VIS spectrophotometry and FTIR. The shifted peaks of the XRD pattern were analysed for the surface modification of the MWCNTOs surfaces with the degree of oxidation. Surface morphology of the samples was obtained using FESEM and found comparable changes with the degree of oxidation. The percentage of Methylene Blue (MB) dye removal was examined using oxidized samples, and the impact of oxidation on the efficacy of dye adsorption was investigated. The results showed that maximum 79% removal occurred for lowest oxidised MWCNTs compared to others as maximum oxidation leads to agglomeration of particles. The Freundlich isotherm and pseudo 1st order reaction order models exhibited optimal compatibility with pristine MWCNTs. In contrast, Langmuir and pseudo 2nd order kinetics models demonstrated superior fitment with oxidized MWCNTs. This suggests a transition in the adsorption phenomenon from physisorption to chemisorption.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 207-218"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Municipal solid waste supply chain optimization for value-added product development under uncertainty 不确定条件下城市生活垃圾供应链的增值产品开发优化
Pub Date : 2025-04-01 Epub Date: 2024-12-24 DOI: 10.1016/j.wmb.2024.12.009
Muazzam Mukhtar , Muhammad Rizwan , Atta Ullah , Ali Elkamel , Salman Raza Naqvi , Muhammad Zaman
Optimizing municipal solid waste (MSW) management through the production of valuable products and energy conversion is crucial to mitigate environmental damage and promote economic sustainability. This study focuses on addressing the MSW supply chain problem by exploring the optimal location for the waste treatment. The supply chain network encompasses MSW transfer stations, treatment facilities, and markets with product demands. The methodological approach entails constructing a superstructure, gathering relevant data, and analyzing the results. Both deterministic MILP and two stage stochastic model are used in this study. A deterministic mixed-integer linear programming (MILP) model is employed to optimize the MSW supply chain problem, with the use of solver BARON. To account for uncertainties in supply–demand and transportation costs, a two-stage stochastic MILP model is developed. The deterministic equivalent approach is then employed to solve the stochastic model, resulting in an average solution across all scenarios. The decision variable pertaining to the selection of treatment technology locations is managed in the first stage. The second stage focuses on determining transportation and production-related decisions. Stochastic models can capture the inherent unpredictability of real-world systems by simulating a range of potential scenarios, helping to tackle uncertainty. To underscore the practical relevance of the mathematical programming formulation, a case study is presented and thoroughly analyzed.
通过生产有价值的产品和能源转换来优化城市固体废物管理对于减轻环境破坏和促进经济可持续性至关重要。本研究的重点是通过探索垃圾处理的最佳地点来解决城市生活垃圾供应链问题。供应链网络包括城市生活垃圾中转站、处理设施和有产品需求的市场。方法论方法需要构建一个上层结构,收集相关数据,并分析结果。本研究采用了确定性MILP模型和两阶段随机模型。采用确定性混合整数线性规划(MILP)模型,利用求解器BARON对城市生活垃圾供应链问题进行优化。为了考虑供需和运输成本的不确定性,建立了一个两阶段随机MILP模型。然后采用确定性等效方法求解随机模型,得到所有场景的平均解。在第一阶段对处理技术位置选择的决策变量进行管理。第二阶段的重点是确定运输和生产相关的决策。随机模型可以通过模拟一系列潜在的场景来捕捉现实世界系统固有的不可预测性,从而帮助解决不确定性。为了强调数学规划公式的实际意义,本文提出了一个案例研究并进行了深入分析。
{"title":"Municipal solid waste supply chain optimization for value-added product development under uncertainty","authors":"Muazzam Mukhtar ,&nbsp;Muhammad Rizwan ,&nbsp;Atta Ullah ,&nbsp;Ali Elkamel ,&nbsp;Salman Raza Naqvi ,&nbsp;Muhammad Zaman","doi":"10.1016/j.wmb.2024.12.009","DOIUrl":"10.1016/j.wmb.2024.12.009","url":null,"abstract":"<div><div>Optimizing municipal solid waste (MSW) management through the production of valuable products and energy conversion is crucial to mitigate environmental damage and promote economic sustainability. This study focuses on addressing the MSW supply chain problem by exploring the optimal location for the waste treatment. The supply chain network encompasses MSW transfer stations, treatment facilities, and markets with product demands. The methodological approach entails constructing a superstructure, gathering relevant data, and analyzing the results. Both deterministic MILP and two stage stochastic model are used in this study. A deterministic mixed-integer linear programming (MILP) model is employed to optimize the MSW supply chain problem, with the use of solver BARON. To account for uncertainties in supply–demand and transportation costs, a two-stage stochastic MILP model is developed. The deterministic equivalent approach is then employed to solve the stochastic model, resulting in an average solution across all scenarios. The decision variable pertaining to the selection of treatment technology locations is managed in the first stage. The second stage focuses on determining transportation and production-related decisions. Stochastic models can capture the inherent unpredictability of real-world systems by simulating a range of potential scenarios, helping to tackle uncertainty. To underscore the practical relevance of the mathematical programming formulation, a case study is presented and thoroughly analyzed.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 66-75"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A sustainable approach to dairy wastewater treatment through electrocoagulation: From beverage cans to clean water 电凝法处理乳制品废水的可持续方法:从饮料罐到净水
Pub Date : 2025-04-01 Epub Date: 2024-12-30 DOI: 10.1016/j.wmb.2024.12.012
Nosa Idusuyi , Marzouq Adeyemi Adebayo , Chinenye Adaobi Igwegbe , Orhadahwe Thomas Aghogho , Anina James , Rasaq Adebayo Kazeem
Dairy industry wastewater, laden with high levels of biological oxygen demand (BOD), chemical oxygen demand (COD), and various pollutants, poses significant environmental concerns. This study introduces the innovative use of recycled aluminium cans as electrodes for electrocoagulation, presenting an eco-friendly and cost-effective approach to wastewater treatment that aligns with circular economy principles. This study explores the efficacy of electrocoagulation (EC) in treating dairy wastewater, focusing on the influence of treatment duration, voltage, and pH levels on BOD, COD, and turbidity reduction. Utilizing recycled aluminium electrodes derived from beverage cans, a Taguchi design of experiments with a 3-factor, 3-level orthogonal array was employed. Results from nine experiments reveal that higher voltages and alkaline pH levels notably enhanced COD and BOD removal efficiencies. For instance, high removal rates of 91.67 % for COD and 95.36 % for BOD were achieved at 20 V and pH 9 over a 15-minute treatment duration were obtained from experiments. Furthermore, optimal overall EC performance parameters were obtained using Taguchi and Multi-response optimization using TOPSIS. Analysis of turbidity removal efficiencies demonstrates the significant impact of voltage and treatment duration. The study provides valuable insights into optimizing electrocoagulation processes for efficient treatment of dairy wastewater, offering a sustainable solution for environmental preservation and resource recovery.
乳业废水具有高水平的生物需氧量(BOD)、化学需氧量(COD)和各种污染物,引起了重大的环境问题。本研究介绍了回收铝罐作为电凝电极的创新使用,提出了一种符合循环经济原则的环保和经济有效的废水处理方法。本研究探讨了电絮凝(EC)处理乳制品废水的效果,重点研究了处理时间、电压和pH水平对BOD、COD和浊度降低的影响。利用从饮料罐中提取的再生铝电极,采用三因素三水平正交阵列的田口设计。9项实验结果表明,较高的电压和碱性pH值显著提高了COD和BOD的去除效率。实验结果表明,在20 V和pH为9的条件下,处理时间为15分钟,COD去除率为91.67%,BOD去除率为95.36%。此外,采用田口法和TOPSIS法进行多响应优化,获得了最优的EC整体性能参数。对浊度去除效率的分析表明,电压和处理时间对浊度去除效率有显著影响。该研究为优化电絮凝工艺高效处理乳制品废水提供了有价值的见解,为环境保护和资源回收提供了可持续的解决方案。
{"title":"A sustainable approach to dairy wastewater treatment through electrocoagulation: From beverage cans to clean water","authors":"Nosa Idusuyi ,&nbsp;Marzouq Adeyemi Adebayo ,&nbsp;Chinenye Adaobi Igwegbe ,&nbsp;Orhadahwe Thomas Aghogho ,&nbsp;Anina James ,&nbsp;Rasaq Adebayo Kazeem","doi":"10.1016/j.wmb.2024.12.012","DOIUrl":"10.1016/j.wmb.2024.12.012","url":null,"abstract":"<div><div>Dairy industry wastewater, laden with high levels of biological oxygen demand (BOD), chemical oxygen demand (COD), and various pollutants, poses significant environmental concerns. This study introduces the innovative use of recycled aluminium cans as electrodes for electrocoagulation, presenting an eco-friendly and cost-effective approach to wastewater treatment that aligns with circular economy principles. This study explores the efficacy of electrocoagulation (EC) in treating dairy wastewater, focusing on the influence of treatment duration, voltage, and pH levels on BOD, COD, and turbidity reduction. Utilizing recycled aluminium electrodes derived from beverage cans, a Taguchi design of experiments with a 3-factor, 3-level orthogonal array was employed. Results from nine experiments reveal that higher voltages and alkaline pH levels notably enhanced COD and BOD removal efficiencies. For instance, high removal rates of 91.67 % for COD and 95.36 % for BOD were achieved at 20 V and pH 9 over a 15-minute treatment duration were obtained from experiments. Furthermore, optimal overall EC performance parameters were obtained using Taguchi and Multi-response optimization using TOPSIS. Analysis of turbidity removal efficiencies demonstrates the significant impact of voltage and treatment duration. The study provides valuable insights into optimizing electrocoagulation processes for efficient treatment of dairy wastewater, offering a sustainable solution for environmental preservation and resource recovery.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 96-106"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tailoring sustainable materials: Investigating nanoclay effects on citric acid crosslinked waste coconut fiber reinforced modified vegetable oil composites 裁剪可持续材料:研究纳米粘土对柠檬酸交联废椰子纤维增强改性植物油复合材料的影响
Pub Date : 2025-04-01 Epub Date: 2025-01-03 DOI: 10.1016/j.wmb.2024.12.011
Jurita Baishya , Tarun K. Maji
Sustainability concerns are driving industries to focus on eco-friendly substitutes for polymers and plastics. Waste fibers and bio-based materials are increasingly becoming popular as renewable options. They help lower carbon footprints and reduce reliance on fossil fuels. These materials also tackle environmental problems and support resource conservation and waste reduction. The primary objective of this endeavor is to develop green composites from coconut fiber, an abundant and underutilized byproduct of the coconut industry. This study assesses the effect of incorporating nanoclay at varying weight percentages (1, 3, and 5 wt%) on the properties of Coconut Fiber (CF) reinforced composites. The composites are fabricated using a compression molding process, with Methacrylic Anhydride modified Epoxidized Linseed Soybean Oil (MAELSO) serving as the polymer matrix, and Citric Acid (CA), a naturally derived crosslinker obtained from citrus fruits, to enhance the bonding within the material. The interaction between MAELSO, CF, CA and nanoclay was determined by Fourier Transform Infrared (FTIR) spectroscopy. X-ray Diffraction (XRD) and Transmission Electron Microscopy techniques (TEM) were employed to investigate the delamination and dispersal of silicate layers. Evaluation of surface morphology was achieved by Scanning Electron Microscopy (SEM) technique. The nanoclay-filled composites exhibited better mechanical property, higher thermal stability and flame retardant property compared to the nanoclay-free composites. Among all the nanocomposites those loaded with 1 wt% of nanoclay, exhibited the least amount of water vapor absorption capacity, volumetric swelling, and highest chemical resistance. The significance of this study lies in that the resulting composites promote sustainability by utilizing waste, renewable resources and biodegradable materials. This approach minimizes environmental impact while maintaining performance. As an eco-friendly alternative, these composites provide a viable substitute for conventional, non-biodegradable synthetic materials, supporting both environmental conservation and advanced material performance. The developed green composites demonstrate potential for construction and household applications due to their improved mechanical strength, thermal stability, and flame retardancy. Their low water absorption and improved chemical resistance make them suitable for humid environments, supporting sustainable material innovation.
对可持续性的担忧正推动行业专注于聚合物和塑料的环保替代品。废弃纤维和生物基材料作为可再生材料越来越受欢迎。它们有助于降低碳足迹,减少对化石燃料的依赖。这些材料还能解决环境问题,支持节约资源和减少废物。这项努力的主要目标是从椰子纤维中开发绿色复合材料,椰子纤维是椰子工业丰富而未充分利用的副产品。本研究评估了以不同重量百分比(1、3和5 wt%)加入纳米粘土对椰子纤维(CF)增强复合材料性能的影响。复合材料采用压缩成型工艺制造,以甲基丙烯酸酐改性环氧亚麻籽大豆油(MAELSO)作为聚合物基体,柠檬酸(CA)是一种从柑橘类水果中提取的天然交联剂,以增强材料内部的粘合。利用傅里叶变换红外光谱(FTIR)测定了MAELSO、CF、CA与纳米粘土的相互作用。采用x射线衍射(XRD)和透射电子显微镜(TEM)研究了硅酸盐层的分层和分散。通过扫描电子显微镜(SEM)技术对表面形貌进行了评价。与不含纳米粘土的复合材料相比,纳米粘土填充复合材料具有更好的力学性能、更高的热稳定性和阻燃性能。在所有纳米复合材料中,负载量为1wt %的纳米粘土的材料表现出最小的水蒸气吸收能力、体积膨胀能力和最高的耐化学性。本研究的意义在于,通过利用废弃物、可再生资源和可生物降解材料,所得到的复合材料促进了可持续性。这种方法在保持性能的同时最大限度地减少对环境的影响。作为一种环保替代品,这些复合材料为传统的、不可生物降解的合成材料提供了可行的替代品,既支持环境保护,又支持先进的材料性能。由于其改进的机械强度,热稳定性和阻燃性,开发的绿色复合材料显示出建筑和家庭应用的潜力。它们的低吸水性和改进的耐化学性使它们适合潮湿的环境,支持可持续的材料创新。
{"title":"Tailoring sustainable materials: Investigating nanoclay effects on citric acid crosslinked waste coconut fiber reinforced modified vegetable oil composites","authors":"Jurita Baishya ,&nbsp;Tarun K. Maji","doi":"10.1016/j.wmb.2024.12.011","DOIUrl":"10.1016/j.wmb.2024.12.011","url":null,"abstract":"<div><div>Sustainability concerns are driving industries to focus on eco-friendly substitutes for polymers and plastics. Waste fibers and bio-based materials are increasingly becoming popular as renewable options. They help lower carbon footprints and reduce reliance on fossil fuels. These materials also tackle environmental problems and support resource conservation and waste reduction. The primary objective of this endeavor is to develop green composites from coconut fiber, an abundant and underutilized byproduct of the coconut industry. This study assesses the effect of incorporating nanoclay at varying weight percentages (1, 3, and 5 wt%) on the properties of Coconut Fiber (CF) reinforced composites. The composites are fabricated using a compression molding process, with Methacrylic Anhydride modified Epoxidized Linseed Soybean Oil (MAELSO) serving as the polymer matrix, and Citric Acid (CA), a naturally derived crosslinker obtained from citrus fruits, to enhance the bonding within the material. The interaction between MAELSO, CF, CA and nanoclay was determined by Fourier Transform Infrared (FTIR) spectroscopy. X-ray Diffraction (XRD) and Transmission Electron Microscopy techniques (TEM) were employed to investigate the delamination and dispersal of silicate layers. Evaluation of surface morphology was achieved by Scanning Electron Microscopy (SEM) technique. The nanoclay-filled composites exhibited better mechanical property, higher thermal stability and flame retardant property compared to the nanoclay-free composites. Among all the nanocomposites those loaded with 1 wt% of nanoclay, exhibited the least amount of water vapor absorption capacity, volumetric swelling, and highest chemical resistance. The significance of this study lies in that the resulting composites promote sustainability by utilizing waste, renewable resources and biodegradable materials. This approach minimizes environmental impact while maintaining performance. As an eco-friendly alternative, these composites provide a viable substitute for conventional, non-biodegradable synthetic materials, supporting both environmental conservation and advanced material performance. The developed green composites demonstrate potential for construction and household applications due to their improved mechanical strength, thermal stability, and flame retardancy. Their low water absorption and improved chemical resistance make them suitable for humid environments, supporting sustainable material innovation.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 137-152"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Valuable resources recovery from palm oil mill effluent (POME): A short review on sustainable wealth reclamation 棕榈油厂废水中有价值资源的回收:可持续财富回收研究综述
Pub Date : 2025-04-01 Epub Date: 2024-12-07 DOI: 10.1016/j.wmb.2024.12.002
Saifullahi Shehu Imam , Sadiq Sani , Muhammad Mujahid , Rohana Adnan
Palm oil mill effluent (POME) is a substantial by-product generated in the palm oil industry that has traditionally been regarded as waste due to its high pollutant content. However, recent advances emphasize the possibility of recovering valuable resources from POME, which would contribute to environmental sustainability and economic benefits. This made POME treatment the subject of numerous investigations. Various methods, mostly biological, have evolved over the past few years for the successful valorization of POME to produce useful resources including biofuels (biohydrogen, biogas, bioacetone, biobutanol, bioethanol, biohythane etc.), value-added chemicals (enzymes, volatile fatty acids, citric acid, carotenes, lipids etc.), nutrients (micronutrients, macronutrients), pesticides, solvents, and adsorbents. The current review’s objective is to summarize the possible approaches for conversion of POME waste to wealth with some outlooks. By transforming waste into valuable resources, the palm oil sector can improve its sustainability, minimize environmental footprints, and establish new revenue streams.
棕榈油厂废水(POME)是棕榈油工业产生的大量副产品,由于其污染物含量高,传统上被视为废物。然而,最近的进展强调从塑料中回收宝贵资源的可能性,这将有助于环境的可持续性和经济效益。这使得POME治疗成为许多研究的主题。在过去的几年里,各种各样的方法,主要是生物方法,已经发展到成功地使POME增值,以生产有用的资源,包括生物燃料(生物氢、沼气、生物丙酮、生物丁醇、生物乙醇、生物乙烷等)、增值化学品(酶、挥发性脂肪酸、柠檬酸、胡萝卜素、脂类等)、营养物质(微量营养素、宏量营养素)、农药、溶剂和吸附剂。本次审查的目的是总结将塑料废物转化为财富的可能方法,并提出一些展望。通过将废物转化为宝贵的资源,棕榈油行业可以提高其可持续性,最大限度地减少环境足迹,并建立新的收入来源。
{"title":"Valuable resources recovery from palm oil mill effluent (POME): A short review on sustainable wealth reclamation","authors":"Saifullahi Shehu Imam ,&nbsp;Sadiq Sani ,&nbsp;Muhammad Mujahid ,&nbsp;Rohana Adnan","doi":"10.1016/j.wmb.2024.12.002","DOIUrl":"10.1016/j.wmb.2024.12.002","url":null,"abstract":"<div><div>Palm oil mill effluent (POME) is a substantial by-product generated in the palm oil industry that has traditionally been regarded as waste due to its high pollutant content. However, recent advances emphasize the possibility of recovering valuable resources from POME, which would contribute to environmental sustainability and economic benefits. This made POME treatment the subject of numerous investigations. Various methods, mostly biological, have evolved over the past few years for the successful valorization of POME to produce useful resources including biofuels (biohydrogen, biogas, bioacetone, biobutanol, bioethanol, biohythane etc.), value-added chemicals (enzymes, volatile fatty acids, citric acid, carotenes, lipids etc.), nutrients (micronutrients, macronutrients), pesticides, solvents, and adsorbents. The current review’s objective is to summarize the possible approaches for conversion of POME waste to wealth with some outlooks. By transforming waste into valuable resources, the palm oil sector can improve its sustainability, minimize environmental footprints, and establish new revenue streams.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 1-16"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heavy metals removal from mine wastewater using polysulfone membrane infused with waste plastic-derived carbon nanotubes as filler 以废塑料衍生碳纳米管为填料的聚砜膜去除矿山废水中的重金属
Pub Date : 2025-04-01 Epub Date: 2024-12-12 DOI: 10.1016/j.wmb.2024.12.005
H.U. Modekwe , I.M. Ramatsa , M.A. Mamo , O.O. Sadare , M.O. Daramola , K. Moothi
The study focuses on “treating waste with waste” through the removal of toxic metals from gold mine wastewater using polysulfone (PSF) membrane infused with waste plastic derived-multi-walled carbon nanotube (MWCNTs) as an innovative approach. MWCNTs synthesized from waste polypropylene (PP) plastics by the chemical vapour deposition (CVD) method were purified in oxidizing acid, and different loadings (0, 0.05, 0.10, and 0.15 wt%) were incorporated into the PSF membrane to form mixed matrix membranes (MMM) via phase inversion technique. Fabricated pristine and nanocomposite membranes’ properties: hydrophilicity, thermal stability, and morphology, were ascertained by the water contact angle measurement, thermogravimetry analysis, and scanning electron microscopy, respectively. Results show that incorporating plastic-derived-MWCNTs into the matrices of PSF polymer significantly enhanced the properties of all fabricated MWCNTs/PSF nanocomposite membranes compared to pristine PSF. The flux and rejection of metals increased with MWCNTs loading. Iron (Fe) and nickel (Ni) removal by pristine PSF were 70.2% and 11.4%, respectively, while optimal Fe and Ni rejection of 91% and 74%, respectively, were obtained with 0.10 wt% MWCNT loading. The results obtained in this work revealed that incorporating different loadings of plastic-derived-MWCNTs onto the PSF polymer matrix impacted its surface properties, and improved flux, and removal efficiency. Therefore, utilizing waste plastics as a precursor in CNTs production will save on the cost of CNTs and provide a sustainable plastic waste management option, as well as open up vast prospects at the industrial scale in the potential for application in environmental remediation (such as in membrane separation).
该研究的重点是“以废还废”,即利用注入废塑料衍生的多壁碳纳米管(MWCNTs)的聚砜(PSF)膜作为一种创新方法,从金矿废水中去除有毒金属。利用化学气相沉积法(CVD)从废旧聚丙烯(PP)塑料中合成的MWCNTs在氧化酸中纯化,并通过相转化技术将不同负载(0、0.05、0.10和0.15 wt%)掺入PSF膜中形成混合基质膜(MMM)。通过水接触角测量、热重分析和扫描电镜对制备的原始膜和纳米复合膜的亲水性、热稳定性和形貌进行了研究。结果表明,与原始的PSF相比,将塑料衍生的MWCNTs加入到PSF聚合物基质中可以显著提高所有制备的MWCNTs/PSF纳米复合膜的性能。随着MWCNTs的加载,金属的通量和截留量增加。原始PSF对铁(Fe)和镍(Ni)的去除率分别为70.2%和11.4%,而当MWCNT负载为0.10 wt%时,铁和镍的最佳去除率分别为91%和74%。本研究的结果表明,在PSF聚合物基体上加入不同负载的塑料衍生的mwcnts会影响其表面性能,并提高通量和去除效率。因此,利用废塑料作为碳纳米管生产的前驱体将节省碳纳米管的成本,提供可持续的塑料废物管理选择,并在工业规模上在环境修复(如膜分离)中的应用潜力方面开辟了广阔的前景。
{"title":"Heavy metals removal from mine wastewater using polysulfone membrane infused with waste plastic-derived carbon nanotubes as filler","authors":"H.U. Modekwe ,&nbsp;I.M. Ramatsa ,&nbsp;M.A. Mamo ,&nbsp;O.O. Sadare ,&nbsp;M.O. Daramola ,&nbsp;K. Moothi","doi":"10.1016/j.wmb.2024.12.005","DOIUrl":"10.1016/j.wmb.2024.12.005","url":null,"abstract":"<div><div>The study focuses on “treating waste with waste” through the removal of toxic metals from gold mine wastewater using polysulfone (PSF) membrane infused with waste plastic derived-multi-walled carbon nanotube (MWCNTs) as an innovative approach. MWCNTs synthesized from waste polypropylene (PP) plastics by the chemical vapour deposition (CVD) method were purified in oxidizing acid, and different loadings (0, 0.05, 0.10, and 0.15 wt%) were incorporated into the PSF membrane to form mixed matrix membranes (MMM) via phase inversion technique. Fabricated pristine and nanocomposite membranes’ properties: hydrophilicity, thermal stability, and morphology, were ascertained by the water contact angle measurement, thermogravimetry analysis, and scanning electron microscopy, respectively. Results show that incorporating plastic-derived-MWCNTs into the matrices of PSF polymer significantly enhanced the properties of all fabricated MWCNTs/PSF nanocomposite membranes compared to pristine PSF. The flux and rejection of metals increased with MWCNTs loading. Iron (Fe) and nickel (Ni) removal by pristine PSF were 70.2% and 11.4%, respectively, while optimal Fe and Ni rejection of 91% and 74%, respectively, were obtained with 0.10 wt% MWCNT loading. The results obtained in this work revealed that incorporating different loadings of plastic-derived-MWCNTs onto the PSF polymer matrix impacted its surface properties, and improved flux, and removal efficiency. Therefore, utilizing waste plastics as a precursor in CNTs production will save on the cost of CNTs and provide a sustainable plastic waste management option, as well as open up vast prospects at the industrial scale in the potential for application in environmental remediation (such as in membrane separation).</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 39-47"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Waste Management Bulletin
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1