In this research, a sustainable system to obtain bioethanol from Eichhornia crassipes biomass contaminated with total chromium was developed A phytoremediation system was applied in order to remove chromium from tannery wastewater, using the resulting biomass as raw material. The dry biomass (DS) was subjected to an optimized pretreatment using a Box–Behnken experimental design in which 45 treatments were evaluated. The structural changes in the biomass were characterized by SEM and FTIR. After this, hydrolysis with 3 % H2SO4 using a steam explosion was performed. Chromium retention was higher in roots (99.29 %), leaves and stems (94.14 %). Treatment using C0 = 1.56 % had the highest removal efficiency (R = 95.51 %), followed by 3.13 % (93.47 %). Regarding valorization, the bioethanol yield reached 71.35 % in relation to reducing sugars and 0.12 mL/g with respect to the initial biomass. These results confirm the feasibility of integrating phytoremediation with bioethanol production as a sustainable alternative for treating tannery effluents.
{"title":"Valorization of contaminated Eichhornia crassipes in phytoremediation of tannery waters: Bioethanol production","authors":"Gianella Paredes, Stefani Gonzales, Alejandra Lázaro, Rosario Benegas","doi":"10.1016/j.wmb.2025.100268","DOIUrl":"10.1016/j.wmb.2025.100268","url":null,"abstract":"<div><div>In this research, a sustainable system to obtain bioethanol from Eichhornia crassipes biomass contaminated with total chromium was developed A phytoremediation system was applied in order to remove chromium from tannery wastewater, using the resulting biomass as raw material. The dry biomass (DS) was subjected to an optimized pretreatment using a Box–Behnken experimental design in which 45 treatments were evaluated. The structural changes in the biomass were characterized by SEM and FTIR. After this, hydrolysis with 3 % H<sub>2</sub>SO<sub>4</sub> using a steam explosion was performed. Chromium retention was higher in roots (99.29 %), leaves and stems (94.14 %). Treatment using C<sub>0</sub> = 1.56 % had the highest removal efficiency (R = 95.51 %), followed by 3.13 % (93.47 %). Regarding valorization, the bioethanol yield reached 71.35 % in relation to reducing sugars and 0.12 mL/g with respect to the initial biomass. These results confirm the feasibility of integrating phytoremediation with bioethanol production as a sustainable alternative for treating tannery effluents.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"4 1","pages":"Article 100268"},"PeriodicalIF":0.0,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145652052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rapid urbanization in Ghana has intensified the challenges associated with municipal solid waste management, particularly in relation to open dumping and illegal disposal practices. This study investigates the drivers, patterns, and spatial distribution of informal waste disposal across six municipalities, across Accra and Kumasi, using a mixed-methods approach that integrates household surveys (n = 600), key informant interviews, and machine learning-based route optimization. Results reveal that over 60 % of households resort to informal dumping due to limited-service coverage, high collection costs, and socio-cultural perceptions of waste. The waste stream is predominantly organic, with compostable materials accounting for over 70 % of total waste generated. Engineering-oriented interventions such as community-scale composting, AI-enhanced collection routing, and participatory monitoring using geolocation tools are proposed to address these systemic inefficiencies. The findings underscore the need for decentralized, context-sensitive, and technology-supported waste governance models. Policy recommendations are offered to align local practices with circular economy principles and improve environmental health outcomes.
{"title":"Engineering solutions for reducing open dumping and illegal waste disposal in Ghana","authors":"Ilham Ku-nwa Hamid , Edna Korlekie Dapaah , Hamdala Hunsulu Hamid","doi":"10.1016/j.wmb.2025.100265","DOIUrl":"10.1016/j.wmb.2025.100265","url":null,"abstract":"<div><div>Rapid urbanization in Ghana has intensified the challenges associated with municipal solid waste management, particularly in relation to open dumping and illegal disposal practices. This study investigates the drivers, patterns, and spatial distribution of informal waste disposal across six municipalities, across Accra and Kumasi, using a mixed-methods approach that integrates household surveys (n = 600), key informant interviews, and machine learning-based route optimization. Results reveal that over 60 % of households resort to informal dumping due to limited-service coverage, high collection costs, and socio-cultural perceptions of waste. The waste stream is predominantly organic, with compostable materials accounting for over 70 % of total waste generated. Engineering-oriented interventions such as community-scale composting, AI-enhanced collection routing, and participatory monitoring using geolocation tools are proposed to address these systemic inefficiencies. The findings underscore the need for decentralized, context-sensitive, and technology-supported waste governance models. Policy recommendations are offered to align local practices with circular economy principles and improve environmental health outcomes.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100265"},"PeriodicalIF":0.0,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145571072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-13DOI: 10.1016/j.wmb.2025.100264
Carolina R. Conte , Abigail Nagano , Maya C. Gentry , Christopher W. Simmons
Biosolarization is an alternative to pesticides for soil pest management that can utilize food industry organic matter byproducts as soil amendments to create conditions conducive to pest suppression. Spent mushroom substrate (SMS) is the main byproduct of mushroom cultivation. New uses are needed for this waste stream as its production continues to increase. This study evaluated two types of SMS as sole amendments and as co-amendments with cover crop biomass for biosolarization. SMS consisted of rice bran with hardwood sawdust (BS SMS) and soybean hulls with oak sawdust (SO SMS). Cover crop biomass was a mix of Secale cereale and Trifolium incarnatum. Gas evolution, pH, biocidal organic acid (BOA) production, phytotoxicity, and soil nitrogen were tracked during and/or after simulated biosolarization. SMS and cover crop treatments were compared to rice bran-amended soil and unamended, solarized soil. Results indicate that SO SMS treatments can produce BOA concentrations and phytotoxic conditions comparable to rice bran-amended soil, with BOA content correlating to radish seed germination indices with a coefficient of determination of 0.683. The pH of treatments including cover crop biomass, whether as a sole or co-amendment, significantly decreased during biosolarization, but were higher than pH of rice bran controls. SO SMS and cover crop biomass as sole amendments significantly increased total nitrogen content compared to solarized soil (P < 0.05), likely due to the addition of nitrogen-containing organic matter, but not mineral nitrogen. These findings suggest that certain SMS compositions may be valuable amendments for agricultural pest control via biosolarization.
{"title":"Assessment of spent mushroom substrate recycling via soil biosolarization","authors":"Carolina R. Conte , Abigail Nagano , Maya C. Gentry , Christopher W. Simmons","doi":"10.1016/j.wmb.2025.100264","DOIUrl":"10.1016/j.wmb.2025.100264","url":null,"abstract":"<div><div>Biosolarization is an alternative to pesticides for soil pest management that can utilize food industry organic matter byproducts as soil amendments to create conditions conducive to pest suppression. Spent mushroom substrate (SMS) is the main byproduct of mushroom cultivation. New uses are needed for this waste stream as its production continues to increase. This study evaluated two types of SMS as sole amendments and as co-amendments with cover crop biomass for biosolarization. SMS consisted of rice bran with hardwood sawdust (BS SMS) and soybean hulls with oak sawdust (SO SMS). Cover crop biomass was a mix of <em>Secale cereale</em> and <em>Trifolium incarnatum</em>. Gas evolution, pH, biocidal organic acid (BOA) production, phytotoxicity, and soil nitrogen were tracked during and/or after simulated biosolarization. SMS and cover crop treatments were compared to rice bran-amended soil and unamended, solarized soil. Results indicate that SO SMS treatments can produce BOA concentrations and phytotoxic conditions comparable to rice bran-amended soil, with BOA content correlating to radish seed germination indices with a coefficient of determination of 0.683. The pH of treatments including cover crop biomass, whether as a sole or co-amendment, significantly decreased during biosolarization, but were higher than pH of rice bran controls. SO SMS and cover crop biomass as sole amendments significantly increased total nitrogen content compared to solarized soil (P < 0.05), likely due to the addition of nitrogen-containing organic matter, but not mineral nitrogen. These findings suggest that certain SMS compositions may be valuable amendments for agricultural pest control via biosolarization.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100264"},"PeriodicalIF":0.0,"publicationDate":"2025-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145570999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01DOI: 10.1016/j.wmb.2025.100263
Monmon Akter , Masum Billah , Saria Afrin , Walid Hossain , Sonia Nasrin , Mahbub Ul Islam , Faridul Islam , Milton Halder
Soil aggregates are important for aeration, microbial activity, root growth, and infiltration. Soil aggregation can vary depending on microbial activity, soil organic carbon (SOC), and soil management practices. However, the underlying drivers and mechanism of aggregation under different land-uses in southwest Bangladesh remain largely unknown. The objective of current study was to explore the underlying mechanism of aggregation in the soils of southwestern Bangladesh. In current study, soil samples were collected from three widely practiced rice-based land-uses (fallow–rice–fallow, fallow–rice–watermelon, and shrimp–rice–fallow) across the Khulna district of southwest Bangladesh. Results exhibited that the aggregate stability indicated by mean weight diameter (MWD) in fallow-rice-fallow and fallow-rice-watermelon were significantly greater than shrimp-rice-fallow land-use (P < 0.05). Microbial activity in fallow-rice-fallow land-use was 3 times higher than shrimp-rice-fallow land-use (P < 0.05). SOC was also higher in the fallow-rice-fallow and fallow-rice-watermelon land-uses than shrimp-rice-fallow land-use. Scanning electron microscopy and Fourier transform infrared spectroscopy results indicated aggregated morphological features and greater polysaccharides intensity in fallow–rice–fallow and fallow–rice–watermelon land-uses, respectively. A positive relationship was found between microbial biomass carbon (MBC) and MWD (r = 0.56; P < 0.01), and between SOC and MWD (r = 0.38; P < 0.05), indicating the dominant role of soil microbes in aggregation and the enhancement of SOC. Principal component analysis results also support the dominant role of MBC and SOC in aggregation and identified two distinct land-uses based on the soil properties. The study results demonstrate that microbial activity plays a key role in aggregation, enhancing the decomposition of agricultural waste and increasing SOC under investigated land-uses of southwest Bangladesh.
土壤团聚体对通气、微生物活动、根系生长和渗透都很重要。土壤聚集可以根据微生物活动、土壤有机碳（SOC）和土壤管理实践而变化。然而，孟加拉国西南部不同土地利用下的潜在驱动因素和聚集机制在很大程度上仍然未知。本研究的目的是探讨在孟加拉国西南部土壤聚集的潜在机制。在目前的研究中，从孟加拉国西南部库尔纳地区三种广泛采用的以水稻为基础的土地利用方式（休耕-水稻-休耕、休耕-水稻-西瓜和虾-水稻-休耕）收集了土壤样本。结果表明，以平均重径（MWD）为指标，休耕稻-休耕和休耕稻-西瓜土地利用的团聚体稳定性显著大于虾-稻-休耕（P < 0.05）。稻田-休耕地土壤微生物活性是虾-水稻-休耕地土壤微生物活性的3倍（P < 0.05）。休耕-稻-休耕和休耕-稻-西瓜土地利用的有机碳含量也高于虾-稻-休耕土地利用。扫描电镜和傅里叶变换红外光谱分析结果表明，在休耕-水稻-西瓜和休耕-水稻-西瓜土地利用中，多糖形态呈聚集特征，且多糖强度较大。微生物生物量碳（MBC）与MWD呈显著正相关（r = 0.56; P < 0.01），土壤有机碳（SOC）与MWD呈显著正相关（r = 0.38; P < 0.05），说明土壤微生物对土壤有机碳的聚集和增强起主导作用。主成分分析结果也支持MBC和有机碳在聚集性中的主导作用，并根据土壤性质确定了两种不同的土地利用方式。研究结果表明，微生物活动在孟加拉国西南部调查土地利用中对农业废弃物的聚集、分解和有机碳的增加起着关键作用。
{"title":"Soil microbial decomposition of agricultural wastes shapes soil aggregation enhancing organic carbon content in the soils under different land-uses in southwest Bangladesh","authors":"Monmon Akter , Masum Billah , Saria Afrin , Walid Hossain , Sonia Nasrin , Mahbub Ul Islam , Faridul Islam , Milton Halder","doi":"10.1016/j.wmb.2025.100263","DOIUrl":"10.1016/j.wmb.2025.100263","url":null,"abstract":"<div><div>Soil aggregates are important for aeration, microbial activity, root growth, and infiltration. Soil aggregation can vary depending on microbial activity, soil organic carbon (SOC), and soil management practices. However, the underlying drivers and mechanism of aggregation under different land-uses in southwest Bangladesh remain largely unknown. The objective of current study was to explore the underlying mechanism of aggregation in the soils of southwestern Bangladesh. In current study, soil samples were collected from three widely practiced rice-based land-uses (fallow–rice–fallow, fallow–rice–watermelon, and shrimp–rice–fallow) across the Khulna district of southwest Bangladesh. Results exhibited that the aggregate stability indicated by mean weight diameter (MWD) in fallow-rice-fallow and fallow-rice-watermelon were significantly greater than shrimp-rice-fallow land-use (P < 0.05). Microbial activity in fallow-rice-fallow land-use was 3 times higher than shrimp-rice-fallow land-use (P < 0.05). SOC was also higher in the fallow-rice-fallow and fallow-rice-watermelon land-uses than shrimp-rice-fallow land-use. Scanning electron microscopy and Fourier transform infrared spectroscopy results indicated aggregated morphological features and greater polysaccharides intensity in fallow–rice–fallow and fallow–rice–watermelon land-uses, respectively. A positive relationship was found between microbial biomass carbon (MBC) and MWD (r = 0.56; P < 0.01), and between SOC and MWD (r = 0.38; P < 0.05), indicating the dominant role of soil microbes in aggregation and the enhancement of SOC. Principal component analysis results also support the dominant role of MBC and SOC in aggregation and identified two distinct land-uses based on the soil properties. The study results demonstrate that microbial activity plays a key role in aggregation, enhancing the decomposition of agricultural waste and increasing SOC under investigated land-uses of southwest Bangladesh.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100263"},"PeriodicalIF":0.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-31DOI: 10.1016/j.wmb.2025.100259
Edilene da Silva Pereira , Ritieli Marostica , Jackeline Tatiane Gotardo , Jorge de Lucas Junior , Mônica Sarolli Silva de Mendonça Costa
Anaerobic co-digestion (ACoD) of livestock waste with energy crops (EC) can increase methane yield and the profitability of biodigesters. The biochemical methane potential (BMP) of two commercial pumpkin species, “Paulista” (Cucurbita moschata) and “Moranga” (C. maxima), was evaluated in a laboratory setting. These pumpkins were either crushed or cooked and mixed with swine wastewater (SWW). The treatments included: AMonoD of SWW (T0) and ACoD of SWW + raw Paulista (T1), cooked Paulista (T2), raw Moranga (T3), and cooked Moranga (T4). The volume and composition of biogas were measured, and the modified Gompertz, Cone, modified First Order, and Logistic models were adjusted. T3 recorded the highest specific productions (1.39 m3 biogas and 0.91 m3 CH4 kg-1 VS), surpassing (p ≤ 0.05) the AMonoD and the other trials, without altering the methane content in biogas. It is concluded that crushed raw moranga is a low-cost EC that can significantly enhance the performance of ACoD with SWW, opening up exciting possibilities for the future of biogas technology. The integration of BMP with cone modelling provides reliable parameters for sizing more compact and economically attractive rural biodigesters.
{"title":"Biochemical methane potential of pumpkin energy crops co-digested with swine wastewater","authors":"Edilene da Silva Pereira , Ritieli Marostica , Jackeline Tatiane Gotardo , Jorge de Lucas Junior , Mônica Sarolli Silva de Mendonça Costa","doi":"10.1016/j.wmb.2025.100259","DOIUrl":"10.1016/j.wmb.2025.100259","url":null,"abstract":"<div><div>Anaerobic co-digestion (ACoD) of livestock waste with energy crops (EC) can increase methane yield and the profitability of biodigesters. The biochemical methane potential (BMP) of two commercial pumpkin species, “Paulista” (Cucurbita moschata) and “Moranga” (C. maxima), was evaluated in a laboratory setting. These pumpkins were either crushed or cooked and mixed with swine wastewater (SWW). The treatments included: AMonoD of SWW (T0) and ACoD of SWW + raw Paulista (T1), cooked Paulista (T2), raw Moranga (T3), and cooked Moranga (T4). The volume and composition of biogas were measured, and the modified Gompertz, Cone, modified First Order, and Logistic models were adjusted. T3 recorded the highest specific productions (1.39 m<sup>3</sup> biogas and 0.91 m<sup>3</sup> CH<sub>4</sub> kg<sup>-1</sup> VS), surpassing (p ≤ 0.05) the AMonoD and the other trials, without altering the methane content in biogas. It is concluded that crushed raw moranga is a low-cost EC that can significantly enhance the performance of ACoD with SWW, opening up exciting possibilities for the future of biogas technology. The integration of BMP with cone modelling provides reliable parameters for sizing more compact and economically attractive rural biodigesters.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100259"},"PeriodicalIF":0.0,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-31DOI: 10.1016/j.wmb.2025.100262
Jinglei Xie, Junjie Liu, Yang Liu, Wenlun Qiu, Quan Zhang, Meng Zhang
The use of recycled fibers in papermaking is critical for sustainability, cost reduction, and energy efficiency. However, their incorporation into tissue paper may adversely affect product properties. This study investigates the impact of recycled fibers on tissue paper wettability by analyzing a mix of wood and recycled fibers. Results indicate that as the recycled fiber ratio increased from 0 % to 100 %, surface hydrophilic functional groups increased at first and then decreased, and surface free energy also increased from 152 mJ/m2 to 191mJ/m2 and then decreased to 115 mJ/m2. The highest surface free energy appeared at the point of 34.3 % of recycled fibers. These findings demonstrate that a better control of recycled fibers content could improve tissue paper wettability, also providing a potential method for detecting recycled fiber content in paper products.
{"title":"Impact of recycled fiber content on tissue paper wettability","authors":"Jinglei Xie, Junjie Liu, Yang Liu, Wenlun Qiu, Quan Zhang, Meng Zhang","doi":"10.1016/j.wmb.2025.100262","DOIUrl":"10.1016/j.wmb.2025.100262","url":null,"abstract":"<div><div>The use of recycled fibers in papermaking is critical for sustainability, cost reduction, and energy efficiency. However, their incorporation into tissue paper may adversely affect product properties. This study investigates the impact of recycled fibers on tissue paper wettability by analyzing a mix of wood and recycled fibers. Results indicate that as the recycled fiber ratio increased from 0 % to 100 %, surface hydrophilic functional groups increased at first and then decreased, and surface free energy also increased from 152 mJ/m<sup>2</sup> to 191mJ/m<sup>2</sup> and then decreased to 115 mJ/m<sup>2</sup>. The highest surface free energy appeared at the point of 34.3 % of recycled fibers. These findings demonstrate that a better control of recycled fibers content could improve tissue paper wettability, also providing a potential method for detecting recycled fiber content in paper products.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100262"},"PeriodicalIF":0.0,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-30DOI: 10.1016/j.wmb.2025.100261
Isabela Maganha , Ana Flávia Andrade Martins , Cíntia Cristiane Moreira , Leonardo Flaviano Silva Moura de Sá , Lucas Filipe de Almeida Brito , Sara Alves de Araújo , Thaís Ribeiro Santiago , Antonio Mousinho de Oliveira Fernandes , Tábata Nakagomi Fernandes Pereira
Food waste is a global problem with significant economic, human and environmental impacts. The sources of food waste are many: households, grocery stores, restaurants, food service companies, farms and manufacturers. In restaurants, food waste occurs at all stages, from sellers to consumers, making it a serious social, environmental and economic issue. This study investigates food waste resulting from overstocking in a restaurant specializing in Japanese cuisine in Itabira, Minas Gerais, Brazil using the case study methodology. The findings indicate that the most probable cause of food waste in the restaurant is inaccurate demand and sales forecasting, leading to an outdated production plan. To address the outdated production plan, the following actions are recommended: run informative campaigns, analyze portion and dish sizes, conduct periodic reviews of food quality, change the menu frequently, select an appropriated demand and sales forecasting technique, implement pre-ordering, engage in charity/donation, apply coercion, define standard procedures and train employees. This case study offers a unique perspective by focusing on the specific geographical context of Itabira, Minas Gerais, Brazil, providing insights into waste management in restaurants. The theoretical implications demonstrate how the research advances existing frameworks by integrating a regionally relevant and distinctive context. On the practical side, the findings provide actionable insights to help develop targeted policies and strategies that address the specific challenges and needs faced by managers of restaurants.
{"title":"Unveiling food waste: A case study of a restaurant specializing in Japanese cuisine in Brazil","authors":"Isabela Maganha , Ana Flávia Andrade Martins , Cíntia Cristiane Moreira , Leonardo Flaviano Silva Moura de Sá , Lucas Filipe de Almeida Brito , Sara Alves de Araújo , Thaís Ribeiro Santiago , Antonio Mousinho de Oliveira Fernandes , Tábata Nakagomi Fernandes Pereira","doi":"10.1016/j.wmb.2025.100261","DOIUrl":"10.1016/j.wmb.2025.100261","url":null,"abstract":"<div><div>Food waste is a global problem with significant economic, human and environmental impacts. The sources of food waste are many: households, grocery stores, restaurants, food service companies, farms and manufacturers. In restaurants, food waste occurs at all stages, from sellers to consumers, making it a serious social, environmental and economic issue. This study investigates food waste resulting from overstocking in a restaurant specializing in Japanese cuisine in Itabira, Minas Gerais, Brazil using the case study methodology. The findings indicate that the most probable cause of food waste in the restaurant is inaccurate demand and sales forecasting, leading to an outdated production plan. To address the outdated production plan, the following actions are recommended: run informative campaigns, analyze portion and dish sizes, conduct periodic reviews of food quality, change the menu frequently, select an appropriated demand and sales forecasting technique, implement pre-ordering, engage in charity/donation, apply coercion, define standard procedures and train employees. This case study offers a unique perspective by focusing on the specific geographical context of Itabira, Minas Gerais, Brazil, providing insights into waste management in restaurants. The theoretical implications demonstrate how the research advances existing frameworks by integrating a regionally relevant and distinctive context. On the practical side, the findings provide actionable insights to help develop targeted policies and strategies that address the specific challenges and needs faced by managers of restaurants.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100261"},"PeriodicalIF":0.0,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-23DOI: 10.1016/j.wmb.2025.100260
Juan Antonio Ramírez-Pérez , Felipe Jesús González Barrionuevo , Manuel Jesús Gázquez-González , Reinaldo Sáez Ramos , Juan Pedro Bolívar
The Iberian Pyrite Belt (IPB), located in the SW of Iberian Peninsula, hosts the largest massive sulfide deposit globally, and over two centuries of intensive mining activity have generated huge amounts of abandoned mining waste along this region. Due to the limited information on the volume of the mining tailings, the main objective of this study has been to develop a volumetric inventory of these wastes by using Unmanned Aerial Vehicles (UAVs). For this purpose, Digital Elevation Models (DEM) and Triangular Irregular Networks (TIN) were developed, finding that the estimated waste reserves were 23.3 Mt (1.77∙107 m3) for the selected mining areas. The concentrations of both major and trace elements, and natural radionuclides were determined. Total reserves of Fe (2.12 Mt in Almagrera, Sotiel Coronada), and other metals/metalloids were calculated; highlighting 0.05 Mt for Zn in Riotinto, 0.06 Mt for Pb in Sotiel Coronada and 989 t for Rare Earth Elements in total. Nevertheless, natural radionuclide levels are similar to those found for unperturbed soils (25 Bq kg−1 of 238U, 21 Bq kg−1 of 232Th, and 224 Bq kg−1 for 40K). As potential applications for these mining stockpiles, techniques of Fe, Zn, Pb and REE recovery and uses as building materials are proposed for their valorization and to promote the circular economy.
伊比利亚黄铁矿带（IPB）位于伊比利亚半岛西南部，拥有全球最大的大型硫化物矿床，两个多世纪的密集采矿活动在该地区产生了大量废弃的采矿废物。由于关于采矿尾矿体积的信息有限，本研究的主要目的是利用无人驾驶飞行器（uav）开发这些废物的体积清单。为此，开发了数字高程模型（DEM）和三角形不规则网络（TIN），发现选定矿区的估计废物储量为2330万吨（1.77∙107立方米）。测定了主要元素和微量元素以及天然放射性核素的浓度。计算了Almagrera、Sotiel Coronada地区铁（212 Mt）和其他金属/类金属的总储量；其中Riotinto的Zn为0.05 Mt， Sotiel Coronada的Pb为0.06 Mt，稀土元素为989 t。然而，天然放射性核素水平与未受扰动土壤相似（238U为25 Bq kg - 1, 232Th为21 Bq kg - 1, 40K为224 Bq kg - 1）。作为这些矿山库存的潜在应用，提出了铁、锌、铅和稀土的回收和建筑材料利用技术，以实现其增值和促进循环经济。
{"title":"Inventory of the mining wastes located at the Iberian Pyrite Belt (IPB)","authors":"Juan Antonio Ramírez-Pérez , Felipe Jesús González Barrionuevo , Manuel Jesús Gázquez-González , Reinaldo Sáez Ramos , Juan Pedro Bolívar","doi":"10.1016/j.wmb.2025.100260","DOIUrl":"10.1016/j.wmb.2025.100260","url":null,"abstract":"<div><div>The Iberian Pyrite Belt (IPB), located in the SW of Iberian Peninsula, hosts the largest massive sulfide deposit globally, and over two centuries of intensive mining activity have generated huge amounts of abandoned mining waste along this region. Due to the limited information on the volume of the mining tailings, the main objective of this study has been to develop a volumetric inventory of these wastes by using Unmanned Aerial Vehicles (UAVs). For this purpose, Digital Elevation Models (DEM) and Triangular Irregular Networks (TIN) were developed, finding that the estimated waste reserves were 23.3 Mt (1.77∙10<sup>7</sup> m<sup>3</sup>) for the selected mining areas. The concentrations of both major and trace elements, and natural radionuclides were determined. Total reserves of Fe (2.12 Mt in Almagrera, Sotiel Coronada), and other metals/metalloids were calculated; highlighting 0.05 Mt for Zn in Riotinto, 0.06 Mt for Pb in Sotiel Coronada and 989 t for Rare Earth Elements in total. Nevertheless, natural radionuclide levels are similar to those found for unperturbed soils (25 Bq kg<sup>−1</sup> <!-->of<!--> <sup>238</sup>U, 21 Bq kg<sup>−1</sup> <!-->of<!--> <sup>232</sup>Th, and 224 Bq kg<sup>−1</sup> <!-->for<!--> <sup>40</sup>K). As potential applications for these mining stockpiles, techniques of Fe, Zn, Pb and REE recovery and uses as building materials are proposed for their valorization and to promote the circular economy.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100260"},"PeriodicalIF":0.0,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cellulose nanofiber aerogels (CNFAs) exhibit desirable properties such as nontoxicity, high surface area-to-volume ratio, porosity, and biocompatibility. Their strong capacity to absorb moisture and blood exudates makes them suitable for wound dressings, with broad applications in biomedicine and antimicrobial textiles. Silver nanoparticles (AgNPs) can adhere to the surfaces of pathogenic bacteria, disrupting critical functions such as membrane permeability and respiration. In this study, cellulose nanofibers were prepared from waste carrot pulp and reacted with polyetheramines to form CNFAs. These aerogels were subsequently loaded with green synthesized AgNPs produced using pineapple leaf extract. Characterization revealed that 96.2 % of the AgNPs had diameters smaller than 100 nm. The resulting aerogels exhibited a water vapor transmission rate that exceeded 2000 g·m−2·d−1 and a water absorption capacity greater than 1000 % of their own weight. It was found that the water vapor transmission rate and water absorption capacity of the aerogels could be tuned by adjusting the hydrophilicity and molecular weight of the polyetheramines. Furthermore, polyetheramines containing difunctional primary amine groups formed highly cross-linked networks with CNFs, resulting in densely distributed pores. AgNP-loaded CNFAs also demonstrated excellent antibacterial activity against Escherichia coli. These findings highlight the potential of these materials for use in antimicrobial textiles and advanced wound care applications.
{"title":"Sustainable fabrication of functional bioaerogels with enhanced absorbency, permeability, and antibacterial properties from waste carrot pulp and pineapple leaf extracts","authors":"Yeng-Fong Shih, Tzu-Yu Pan, Tzu-Ying Lu, Ting-Hsuan Huang, Chun-Wei Chang","doi":"10.1016/j.wmb.2025.100258","DOIUrl":"10.1016/j.wmb.2025.100258","url":null,"abstract":"<div><div>Cellulose nanofiber aerogels (CNFAs) exhibit desirable properties such as nontoxicity, high surface area-to-volume ratio, porosity, and biocompatibility. Their strong capacity to absorb moisture and blood exudates makes them suitable for wound dressings, with broad applications in biomedicine and antimicrobial textiles. Silver nanoparticles (AgNPs) can adhere to the surfaces of pathogenic bacteria, disrupting critical functions such as membrane permeability and respiration. In this study, cellulose nanofibers were prepared from waste carrot pulp and reacted with polyetheramines to form CNFAs. These aerogels were subsequently loaded with green synthesized AgNPs produced using pineapple leaf extract. Characterization revealed that 96.2 % of the AgNPs had diameters smaller than 100 nm. The resulting aerogels exhibited a water vapor transmission rate that exceeded 2000 g·m<sup>−2</sup>·d<sup>−1</sup> and a water absorption capacity greater than 1000 % of their own weight. It was found that the water vapor transmission rate and water absorption capacity of the aerogels could be tuned by adjusting the hydrophilicity and molecular weight of the polyetheramines. Furthermore, polyetheramines containing difunctional primary amine groups formed highly cross-linked networks with CNFs, resulting in densely distributed pores. AgNP-loaded CNFAs also demonstrated excellent antibacterial activity against Escherichia coli<strong>.</strong> These findings highlight the potential of these materials for use in antimicrobial textiles and advanced wound care applications.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100258"},"PeriodicalIF":0.0,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-17DOI: 10.1016/j.wmb.2025.100256
Jawad Ali Hasan Shoqeir , Eman Omar Murshed Mansour
Municipal solid waste (MSW) landfills are a significant source of greenhouse gas emissions. Biogas is formed under anaerobic conditions by the decomposition of organic matter contained in the waste. Estimating biogas production, which largely depends on the type of waste deposited in the landfill, is essential for designing the gas collection system and assessing potential energy production. This study aims to demonstrate the added value of municipal waste in generating sustainable energy in Palestine, resulting from CH4 emissions from local landfills. The electricity generation of a waste-to-energy (WTE) plant was studied based on mathematical modelling. With the application of the First Order Decay (FOD) model as recommended by the Intergovernmental Panel on Climate Change (IPCC), Palestine’s MSW landfills’ methane emissions were estimated to be approximately 158.1 kg of CH4 per ton of household garbage, equivalent to approximately 251.2 million kilograms of methane annually. Applying an assumed rate of electricity generation per ton of MSW of 0.08 MWh, the estimated electricity generated from landfill gas was 127,200 MWh per year, corresponding to a reduction of approximately 69,960 tons of CO2 equivalent per year. A case study of Al-Minya landfill also highlighted the indigenous capacity for electricity generation and emission reduction, demonstrating the feasibility of WTE initiatives as a viable climate change mitigation policy for Palestine. In this article, the electricity generation and equivalent CO2 emission reduction of WTE plants using biogas from municipal landfills in both Palestine and Egypt were critically evaluated. It was found that the reduction equivalent of GHG emissions from the municipal landfills is 20.5 % in Palestine and 8.4 % in Egypt, which is a good indicator of the environmental feasibility of biogas plants to generate electricity from waste.
{"title":"The potential of electricity generation from landfill gas (LFG) as a strategy to mitigate greenhouse gas emissions","authors":"Jawad Ali Hasan Shoqeir , Eman Omar Murshed Mansour","doi":"10.1016/j.wmb.2025.100256","DOIUrl":"10.1016/j.wmb.2025.100256","url":null,"abstract":"<div><div>Municipal solid waste (MSW) landfills are a significant source of greenhouse gas emissions. Biogas is formed under anaerobic conditions by the decomposition of organic matter contained in the waste. Estimating biogas production, which largely depends on the type of waste deposited in the landfill, is essential for designing the gas collection system and assessing potential energy production. This study aims to demonstrate the added value of municipal waste in generating sustainable energy in Palestine, resulting from CH<sub>4</sub> emissions from local landfills. The electricity generation of a waste-to-energy (WTE) plant was studied based on mathematical modelling. With the application of the First Order Decay (FOD) model as recommended by the Intergovernmental Panel on Climate Change (IPCC), Palestine’s MSW landfills’ methane emissions were estimated to be approximately 158.1 kg of CH<sub>4</sub> per ton of household garbage, equivalent to approximately 251.2 million kilograms of methane annually. Applying an assumed rate of electricity generation per ton of MSW of 0.08 MWh, the estimated electricity generated from landfill gas was 127,200 MWh per year, corresponding to a reduction of approximately 69,960 tons of CO<sub>2</sub> equivalent per year. A case study of Al-Minya landfill also highlighted the indigenous capacity for electricity generation and emission reduction, demonstrating the feasibility of WTE initiatives as a viable climate change mitigation policy for Palestine. In this article, the electricity generation and equivalent CO<sub>2</sub> emission reduction of WTE plants using biogas from municipal landfills in both Palestine and Egypt were critically evaluated. It was found that the reduction equivalent of GHG emissions from the municipal landfills is 20.5 % in Palestine and 8.4 % in Egypt, which is a good indicator of the environmental feasibility of biogas plants to generate electricity from waste.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 4","pages":"Article 100256"},"PeriodicalIF":0.0,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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