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Time to treat the climate and nature crisis as one indivisible global health emergency 是时候将气候和自然危机视为一个不可分割的全球卫生紧急事件
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-30 DOI: 10.1080/03067319.2023.2276513
Kamran Abbasi, Parveen Ali, Virginia Barbour, Thomas Benfield, Kirsten Bibbins-Domingo, Gregory E. Erhabor, Stephen Hancocks, Richard Horton, Laurie Laybourn-Langton, Robert Mash, Peush Sahni, Wadeia Mohammad Sharief, Paul Yonga, Chris Zielinski
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引用次数: 0
Heavy metals in sludge from the sewage treatment plant network: a tool to evaluate source and risks of heavy metals to land application 污水处理厂污泥中的重金属:一种评估重金属来源和对土地利用风险的工具
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-30 DOI: 10.1080/03067319.2023.2271425
Md. Saiful Islam, Md. Towhidul Islam, Zulhilmi Ismail, Khalid A. Ibrahim, Rahmah N. Al-Qthanin, Abubakr M. Idris
ABSTRACTThe aim of the study was to evaluate heavy metals concentration based on the total and chemical fractions of sewage sludge, to identify the sources of heavy metals and to assess ecological risks. Thirty-six anaerobic mixed sludge samples were collected from six different types of sewage treatment plant network in Dhaka city, Bangladesh. Total and fraction concentration of heavy metals in sludge samples were analysed by inductively coupled plasma mass spectrometer following acid digestion. The mean ranges of chromium (Cr), nickel (Ni), copper (Cu), arsenic (As), cadmium (Cd), lead (Pb), iron (Fe), manganese (Mn) and zinc (Zn) in the sludges were 237.3–381.8, 108.5–220.2, 116.1–207.2, 14.9–56.1, 0.68–2.86, 72.4–172.0, 12055 –20,015, 64.8–170.6 and 117.5–178.5 mg/kg, respectively. The data of geochemical speciation showed that Fe, Zn, Ni, Cu and Mn were associated with the residual fraction, whereas As, Cd and Pb showed predominant proportion in the exchangeable fraction, indicating the severity of risk by As, Cd and Pb to the surrounding ecosystem. The findings of the study revealed that heavy metals posed moderate to considerable ecological risk. Anthropogenic activities including industrial wastes and agricultural chemicals are substantial sources for heavy metals in the sludge of STP network in the study area.KEYWORDS: Bangladeshheavy metalssequential extractionsludgeSTP network AcknowledgmentsThe samples collected in Bangladesh were brought into Japan based on the permission issued by the Yokohama Plant Protection Station (Import permit No. 25Y324 and 25Y1009). The authors are thankful to the authority of Patuakhali Science and Technology University (PSTU), Dumki, Patuakhali-8602, Bangladesh for sample processing and The University of Tokyo, Japan, for sample analysis. Furthermore, we are thankful for the kind help from the members of Dhaka University, Bangladesh, during the field sampling.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplementary dataSupplemental data for this article can be accessed online at https://doi.org/10.1080/03067319.2023.2271425.Additional informationFundingThe authors extend their appreciation to the Deanship of Scientific Research at King Khalid University for funding this work through Large Group Research Project under grant number (R.G.P.2/326/44).
摘要本研究的目的是根据污水污泥的总组分和化学组分评价重金属浓度,识别重金属来源,评价生态风险。从孟加拉国达卡市六种不同类型的污水处理厂网络中收集了36个厌氧混合污泥样本。采用酸消化后的电感耦合等离子体质谱仪分析了污泥样品中重金属的总浓度和分数浓度。污泥中铬(Cr)、镍(Ni)、铜(Cu)、砷(As)、镉(Cd)、铅(Pb)、铁(Fe)、锰(Mn)和锌(Zn)的平均含量范围分别为237.3 ~ 381.8、108.5 ~ 220.2、116.1 ~ 207.2、14.9 ~ 56.1、0.68 ~ 2.86、72.4 ~ 172.0、12055 ~ 20115、64.8 ~ 170.6和117.5 ~ 178.5 mg/kg。地球化学形态数据表明,残余部分以Fe、Zn、Ni、Cu和Mn为主,交换部分以As、Cd和Pb为主,说明As、Cd和Pb对周边生态系统的危害程度较高。研究结果显示,重金属对生态环境构成中度至相当大的风险。人为活动包括工业废物和农业化学品是研究区STP网络污泥中重金属的主要来源。在孟加拉国采集的样品经横滨植物保护站许可进入日本(进口许可证号:25Y324和25Y1009)。作者感谢孟加拉国Dumki, Patuakhali-8602的Patuakhali科技大学(PSTU)对样品处理和日本东京大学对样品分析的权威。此外,我们感谢孟加拉国达卡大学成员在实地抽样期间提供的热心帮助。披露声明作者未报告潜在的利益冲突。补充数据本文的补充数据可在线访问https://doi.org/10.1080/03067319.2023.2271425.Additional informationfunding作者感谢国王哈立德大学的科学研究主任通过批准号(R.G.P.2/326/44)的大型团体研究项目资助这项工作。
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引用次数: 1
Low-cost magnetic carbons-based rubber seed husks materials for highly efficient removal for reactive black 5 and reactive blue 19 textile dyes from wastewater 低成本磁性碳基橡胶种子壳材料,用于高效去除废水中的活性黑5和活性蓝19纺织染料
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-26 DOI: 10.1080/03067319.2023.2269857
Sandrale Grace Mokue Mafo, Paul Alain Nanssou Kouteu, Donald Raoul Tchuifon Tchuifon, Cyrille Ghislain Fotsop, Mexent Zue Mve, Georges Teikam Kenda, Aurelien Bopda, Herman-Idriss Tiotsop Kuete, Christian Sadeu Ngakou, Nche George Ndifor-Angwafor, Martin Ruben Mouangue, Solomon Gabche Anagho
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引用次数: 2
Designing a novel porous Ti 3 C 2 T x MXene/MOF-based 3D-printed architecture as an efficient and easy recoverable adsorbent for organic dye removal from aqueous solution 设计一种新型多孔Ti 3c2t x MXene/ mof的3d打印结构,作为一种高效且易于回收的吸附剂,用于从水溶液中去除有机染料
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-26 DOI: 10.1080/03067319.2023.2271850
Hossein Shahriyari Far, Mina Najafi, Mahdi Hasanzadeh, Rahmatollah Rahimi
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引用次数: 0
Mechanistic understanding of the enhanced adsorption of diclofenac on a heat-treated and acid-leached halloysite 双氯芬酸在热处理酸浸高岭土上增强吸附的机理研究
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-24 DOI: 10.1080/03067319.2023.2270425
Choulia Latifa Halloui, Mounir Khelifa, Samira Ziane, Kheira Marouf-Khelifa, Amine Khelifa
ABSTRACTDiclofenac (DCF), a common nonsteroidal anti-inflammatory drug, is frequently detected in aquatic environments, causing serious threat to aquatic organisms and humans through bioaccumulation, persistence, and toxicity. Using eco-friendly clay-based adsorbents, samples of halloysite (H) processed at 600°C (H600-0N) and then HCl-leached with 3 N concentration (H600-3N) were prepared, characterised by Inductively Coupled Plasma (ICP), N2 adsorption – desorption, and infrared spectroscopy with Fourier transform (FTIR), and used in DCF adsorption. H600-3N exhibited a substantial surface area increase from 63 m2 g−1 for H to 434 m2 g−1 due to an elevated SiO₂/Al₂O₃ ratio of 23.83 against 1.72 for H. In this context, H600-3N and H adsorbed 165 mg g−1 and 37.9 mg g−1 of DCF, respectively. The isotherms of H600-xN(x = 0 or 3) were adequately adjusted to the Langmuir-Freundlich model, while the kinetic data were suitably described by the pseudo-second order equation. Through cross-checking the results of characterisation, DCF adsorption and the FTIR investigation between DCF and H600-3N, a mechanism has been suggested that includes two main components: hydrogen bonding between the silanol’s hydrogen atom and the negatively charged carboxylate anion and hydrophobic interactions between the – Si – O – Si – entities and the DCF aromatic rings. The elucidation of intermolecular interactions between organic contaminants and 1:1 clay minerals is essential to develop the application of these abundant and low-cost materials in wastewater treatment.KEYWORDS: Halloysitemodificationcharacterizationdiclofenac adsorptioninteractionsmechanism Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要双氯芬酸(DCF)是一种常见的非甾体类抗炎药,在水生环境中经常被检测到,通过生物蓄积性、持久性和毒性对水生生物和人类造成严重威胁。采用生态友好型粘土基吸附剂,制备了高岭土(H)在600℃(h600 ~ 0n)处理后,再以3n浓度(h600 ~ 3n)进行hcl浸出的样品,采用电感耦合等离子体(ICP)、N2吸附-解吸、傅里叶变换红外光谱(FTIR)对样品进行了表征,并将其用于DCF吸附。由于SiO₂/Al₂O₃比为23.83比1.72,H600-3N的比表面积从H的63 m2 g−1大幅增加到434 m2 g−1。在这种情况下,H600-3N和H分别吸附了165 mg g−1和37.9 mg g−1的DCF。H600-xN(x = 0或3)的等温线适当地调整为Langmuir-Freundlich模型,而动力学数据则适当地用拟二阶方程描述。通过对表征、DCF吸附和DCF与H600-3N之间的FTIR研究,提出了一种包括两个主要成分的机制:硅醇氢原子与带负电荷的羧酸阴离子之间的氢键和- Si - O - Si实体与DCF芳环之间的疏水相互作用。阐明有机污染物与1:1黏土矿物之间的分子间相互作用,对于开发这些资源丰富且成本低廉的材料在废水处理中的应用至关重要。关键词:氯芬酸修饰、表征、双氯芬酸吸附、相互作用、机理披露声明作者未报告潜在利益冲突。
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引用次数: 0
Response surface methodology based modelling and optimisation of anionic dyes adsorption onto nitrate intercalated Zn 2 Al layer double hydroxide adsorbent 基于响应面法的阴离子染料在硝酸插层锌铝双氢氧化物吸附剂上吸附的建模与优化
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-24 DOI: 10.1080/03067319.2023.2270917
Balram Singh Yadav, Sudip Dasgupta
ABSTRACTIn the present work, nitrate intercalated zinc aluminium layer double hydroxide (ZA-LDH) nanoparticles in the hydrodynamic particle size range between 210 and 530 nm were synthesised using co-precipitation method under reflux condition and nitrogen atmosphere. The pristine ZA-LDH nanoadsorbent was characterised using X-ray diffraction (XRD), Fourier transformation spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). The results revealed the formation of single-phase ZA-LDH nanopowder with sheet-like morphology. The optimisation of adsorption kinetic parameters with the fixed dose of 10 mg for 50 ml of 0.03 mg/ml MO and AY dye solution was performed using the Box Behnken design model (BBD). The effects of three independent variables such as incubation time, temperature and pH of the suspended ZA-LDH nanoadsorbents in the MO and AY dye solution on the adsorption kinetics were studied. Optimum values for the maximum adsorption capacity were evaluated that included the incubation time of 52.4 min, the temperature of 35.45 ± 0.55°C, and the pH of 5.75 ± 0.75. According to the BBD model, ZA-LDH nanoadsorbent exhibited the maximum adsorption percentage of 99.84% and 99.99% of corresponding MO and AY dye, respectively. The ZA-LDH adsorbent retained up to 72.3% for the MO and 60.43% for the AY dye of regeneration capacity after 5 cycles of regeneration. The adsorption kinetic and isotherm of the MO and AY dyes onto the ZA-LDH nanoadsorbent were well fitted with pseudo second order kinetic model and Langmuir model, respectively. According to Langmuir isotherm, the maximum adsorption capacities of 601.62 mg/g for the MO dye and 462.48 mg/g for the AY dye onto the ZA-LDH were found and those confirmed the monolayer chemisorption mechanism in this case.KEYWORDS: Adsorption kineticsBox Behnken design modelnitrate intercalated ZnAl-LDHresponse surface methodology AcknowledgmentsThe Department of Biotechnology, India [Research grant BT/PR13005/MED/31/294/2015] is duly acknowledged in the manuscript for their financial support.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the The Department of Biotechnology, India [BT/PR13005/MED/31/294/2015].
摘要:本文在回流条件和氮气气氛下,采用共沉淀法合成了流体动力粒径范围为210 ~ 530 nm的硝酸锌铝层双氢氧化物(ZA-LDH)纳米颗粒。采用x射线衍射(XRD)、傅里叶变换光谱(FTIR)和场发射扫描电镜(FESEM)对原始ZA-LDH纳米吸附剂进行了表征。结果表明,制备得到了片状的ZA-LDH纳米粉体。采用Box Behnken设计模型(BBD),对0.03 mg/ml MO和AY染料溶液在固定剂量为10 mg时的吸附动力学参数进行优化。研究了ZA-LDH纳米吸附剂在MO和AY染料溶液中悬浮的时间、温度和pH对吸附动力学的影响。最佳吸附条件为:孵育时间52.4 min,温度35.45±0.55℃,pH 5.75±0.75。根据BBD模型,ZA-LDH纳米吸附剂对相应MO和AY染料的最大吸附率分别为99.84%和99.99%。经过5次循环再生后,ZA-LDH吸附剂对MO和AY染料的再生能力分别保持了72.3%和60.43%。MO和AY染料在ZA-LDH纳米吸附剂上的吸附动力学和等温线分别符合拟二级动力学模型和Langmuir模型。根据Langmuir等温线,MO染料在ZA-LDH上的最大吸附量为601.62 mg/g, AY染料在ZA-LDH上的最大吸附量为462.48 mg/g,证实了这种情况下的单层化学吸附机制。关键词:吸附动力学box Behnken设计模型硝酸盐插层ZnAl-LDHresponse surface methodology致谢印度生物技术部[研究资助BT/PR13005/MED/31/294/2015]在论文中正式致谢。披露声明作者未报告潜在的利益冲突。本研究由印度生物技术部资助[BT/PR13005/MED/31/294/2015]。
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引用次数: 0
Sol-gel immunoaffinity chromatography for isolation of deoxynivalenol and zearalenone from food and environmental samples 溶胶-凝胶免疫亲和层析法分离食品和环境样品中的脱氧雪腐菌烯醇和玉米赤霉烯酮
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-24 DOI: 10.1080/03067319.2023.2269856
Ban Khalil Ail
ABSTRACTThe presence of mycotoxins in food is a significant concern due to their potential health risks. It is estimated that around 25% of global food production is contaminated with mycotoxins, which can be produced by certain types of fungi that infect crops during different stages of growth. As a result, it is crucial to monitor mycotoxins in food sources and develop effective methods for removal or reduction. One technique commonly used for detecting and separating mycotoxins is immunoaffinity chromatography (IAC). Traditionally, IAC uses antibodies covalently bonded to a solid support material, but this can lead to conformational changes and reduced affinity towards the analytes. To address these limitations, researchers have explored alternative methods for immobilising biomolecules, such as the sol-gel method, which involves encapsulating biomolecules within the pores of a glass matrix. This approach makes it easier to reuse the immunoaffinity columns and reduces the need for bacteriostatic agents, making the process more cost-effective and efficient. The results showed that sol-gel IAS was able to effectively separate these toxins from complex matrices, demonstrating its potential for widespread application in food safety monitoring. Additionally, the ability of sol-gel IAS to remove mycotoxins from environmental samples tested was highlighting its versatility and potential for broader applications beyond food safety. Finally, they demonstrated the compatibility of sol-gel IAS with high-performance liquid chromatography, enabling online coupling of the two techniques for improved efficiency and accuracy. The findings of this study suggest that sol-gel IAC is a promising method for the detection and separation of mycotoxins in various matrices, including food, environmental samples, and other biological fluids. Its advantages over traditional IAC methods make it an attractive option for large-scale analysis and monitoring of mycotoxins in diverse settings.KEYWORDS: Sol-gel immunoaffinity chromatographydeoxynivalenolzearalenonefood and environmental samples Disclosure statementNo potential conflict of interest was reported by the author.
摘要食品中真菌毒素的存在引起了人们的极大关注,因为它们具有潜在的健康风险。据估计,全球约25%的粮食生产受到真菌毒素的污染,这些毒素可由某些类型的真菌产生,这些真菌在作物生长的不同阶段感染作物。因此,监测食物来源中的真菌毒素并制定去除或减少真菌毒素的有效方法至关重要。一种常用的检测和分离真菌毒素的技术是免疫亲和层析(IAC)。传统上,IAC使用与固体支撑材料共价结合的抗体,但这可能导致构象变化和对分析物的亲和力降低。为了解决这些限制,研究人员已经探索了固定生物分子的替代方法,例如溶胶-凝胶法,该方法将生物分子包裹在玻璃基质的孔隙中。这种方法可以更容易地重复使用免疫亲和柱,减少对抑菌剂的需求,使该过程更具成本效益和效率。结果表明,溶胶-凝胶IAS能够有效地将这些毒素从复杂的基质中分离出来,显示了其在食品安全监测中的广泛应用潜力。此外,溶胶-凝胶IAS从所测环境样品中去除霉菌毒素的能力突出了其多功能性和在食品安全以外的更广泛应用的潜力。最后,他们证明了溶胶-凝胶IAS与高效液相色谱的兼容性,使两种技术能够在线耦合,以提高效率和准确性。本研究结果表明,溶胶-凝胶IAC是一种很有前途的方法,用于检测和分离各种基质中的霉菌毒素,包括食品、环境样品和其他生物液体。与传统的IAC方法相比,其优势使其成为在不同环境下进行真菌毒素大规模分析和监测的有吸引力的选择。关键词:溶胶-凝胶免疫亲和层析羟基雪腐菌烯丙烯酮食品和环境样品披露声明作者未报告潜在利益冲突。
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引用次数: 0
Extraction of Novichoks from aqueous samples for verification analysis of Chemical Weapons Convention 从水样中提取诺维乔克用于《化学武器公约》的核查分析
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-23 DOI: 10.1080/03067319.2023.2269853
Gyanesh Mishra, Pranav Gupta, Rohit Shrivas, Ajay Purohit, Ajeet Kumar, Raghavendra Goud, Vijay Tak, Deepak Pardasani
ABSTRACTThe study was undertaken with the objective of evaluating the different procedures for the extraction of the Novichok class of chemicals from aqueous samples for the verification of Chemical Weapons Convention (CWC). These classes of chemicals are recently added to the scheduled list of CWC, which necessitates the optimisation of analytical protocols for their verification analyses in different environmental samples. Three analytes, namely N-(1-(diethylamino)ethylidene)-P-methylphosphonamidic fluoride (A230), methyl N-(1-(diethylamino)ethylidene)phosphoramidofluoridate (A232) and ethyl N-(1-(diethylamino)ethylidene)phosphoramidofluoridate (A234), were taken as representative chemicals in aqueous samples and extracted with established protocols, such as liquid–liquid extraction (LLE), solid phase extraction (SPE), solid-supported liquid extraction (SLE) and liquid phase microextraction (LPME) techniques. The extraction efficacies were evaluated in terms of the recoveries of analytes as well as the removal of background interferences. Amongst the extraction techniques, SLE offered the least (43.2–66.7%) and LLE and SPE-HLB offered the best recoveries (79.1–92.9%) of the analytes with adequate sample clean-up. LPME techniques produced much better detection limits, going down to 7.6 ng/mL for A234. LPME methods were also found advantageous in terms of high enrichment factors, ease of operation, minimal waste generation and individual safety for handling the toxic chemicals.KEYWORDS: Chemical Weapons Conventionchemical warfare agentsNovichoksliquid–liquid extractionsolid phase extractionliquid-phase microextraction AcknowledgmentThe authors are grateful to Director, DRDE for the support, appreciations and valuable suggestions. The institutional accession number of the manuscript is DRDE-IREC-07-11102022.Disclosure statementNo potential conflict of interest was reported by the authors.
摘要为验证《禁止化学武器公约》(CWC),研究了从水样中提取诺维乔克类化学物质的不同方法。这些类别的化学品最近被添加到《禁止化学武器公约》的附表中,这就需要优化分析方案,以便在不同的环境样品中进行核查分析。以N-(1-(二乙基氨基)乙基乙烯)- p -甲基氟化磷酰胺(A230)、N-(1-(二乙基氨基)乙基乙基)氟化磷酰胺(A232)和N-(1-(二乙基氨基)乙基)氟化磷酰胺(A234)三种分析物作为水相样品的代表性化学物,采用建立的液-液萃取(LLE)、固相萃取(SPE)、固支液萃取(SLE)和液相微萃取(LPME)技术进行提取。从分析物的回收率和去除背景干扰的角度对提取效果进行了评价。在这些提取技术中,SLE的回收率最低(43.2 ~ 66.7%),而LLE和SPE-HLB的回收率最高(79.1 ~ 92.9%)。LPME技术产生了更好的检测限,A234的检测限降至7.6 ng/mL。在处理有毒化学品方面,还发现LPME方法具有富集系数高、易于操作、废物产生最少和个人安全等优点。关键词:化学武器常规化学武器诺维奇液-液萃取固相萃取液相微萃取感谢中国科学技术研究院院长对本文的支持、赞赏和宝贵建议。论文机构检索号:DRDE-IREC-07-11102022。披露声明作者未报告潜在的利益冲突。
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引用次数: 0
Soil contamination, pollution indices, and ecological risk in agricultural areas of important mining region of Türkiye 吉林省重要矿区农区土壤污染、污染指数及生态风险
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-23 DOI: 10.1080/03067319.2023.2270911
Kadriye Taşpinar, Özgür Ateş, Gülser Yalçin, Fatih Kizilaslan, Melis Özge Pinar, Serdar Toprak, Didem Özen, Volkan Alveroğlu, Mahmut Bayram, Hasan Çakilli, Abdullah Altay, Ramazan Yavuz, İ̇smail Dİnek
ABSTRACTHeavy metals accumulate mostly in soil in nature, and heavy metal pollution is becoming a serious concern. This study aimed to determine the pollution level and possible sources of heavy metals in the agricultural areas in the Emet district of Kütahya, where a significant boron mine is located worldwide. 64 soil samples were taken from Emet district of Kütahya, Türkiye in 2016, and Cr, Co, Fe, Ni, Cu, Zn and Pb analysed. Heavy metal pollution was determined using the Enrichment Factor (Ef), Geoaccumulation Index (Igeo), Contamination Factor (Cf), and Ecological Risk Factor (Er), Pollution Load Index (PLI), and Potential Ecological Risk Index (RI). According to the pollution index Ef, the study area is moderately enriched in terms of Pb (4.18) and Zn (2.17), while in terms of Cf, the study area is moderately polluted in terms of Pb (2.13) and Zn (1.02). Moreover, the PLI (2.67) index shows that soils are under multiple heavy metal pollution. According to Pearson correlation analysis and principal component analysis, the source of Pb and Zn in the study area is anthropogenic. However, no heavy metal pollution caused by boron mine was found in the study area.KEYWORDS: Soil contaminationpollution indicesmultivariate analysisKütahya province AcknowledgmentsI would like to thank the anonymous reviewers and the journal administrators for their guidance in registering the article.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementData will be made available at reasonable request.Author contributionAll authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Fatih KIZILASLAN, Melis Özge PINAR, Serdar TOPRAK, Didem ÖZEN, Volkan ALVEROĞLU, Mahmut BAYRAM, Hasan ÇAKILLI, Abdullah ALTAY, Ramazan YAVUZ, İsmail DİNEK. The first draft of the manuscript was written by Özgür ATEŞ, Kadriye TAŞPINAR, Gülser YALÇIN, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.Additional informationFundingThis study was supported by the General Directorate of Agricultural Research And Policies [grant numbers: TAGEM/TSKAD/12/A13/P0701-08].
摘要自然界中重金属主要富集在土壤中,重金属污染日益受到人们的严重关注。本研究旨在确定k塔哈亚Emet地区农业区重金属的污染水平和可能的来源,该地区是世界上一个重要的硼矿所在地。2016年,在俄罗斯塔哈亚县埃梅特地区采集了64份土壤样品,对Cr、Co、Fe、Ni、Cu、Zn和Pb进行了分析。利用富集系数(Ef)、土壤积累指数(Igeo)、污染系数(Cf)、生态风险系数(Er)、污染负荷指数(PLI)和潜在生态风险指数(RI)确定重金属污染。根据污染指数Ef,研究区Pb(4.18)、Zn(2.17)中度富集,Cf(2.13)、Zn(1.02)中度污染。PLI指数为2.67,表明土壤处于多重重金属污染状态。Pearson相关分析和主成分分析表明,研究区铅、锌的来源是人为的。研究区未发现硼矿造成的重金属污染。关键词:土壤污染;污染指标;多变量分析;;披露声明作者未报告潜在的利益冲突。数据可用性声明数据将在合理要求下提供。所有作者都对研究的构思和设计做出了贡献。Fatih KIZILASLAN、Melis Özge PINAR、Serdar TOPRAK、Didem ÖZEN、Volkan ALVEROĞLU、Mahmut BAYRAM、Hasan ÇAKILLI、Abdullah ALTAY、Ramazan YAVUZ、İsmail DİNEK负责材料准备、数据收集和分析。手稿的初稿由Özgür ATEŞ、Kadriye TAŞPINAR、g lser YALÇIN撰写,所有作者都对以前的手稿版本进行了评论。所有作者都阅读并批准了最终的手稿。本研究得到了农业研究和政策总局的支持[资助号:TAGEM/TSKAD/12/A13/P0701-08]。
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引用次数: 0
Efficient visible-light-driven photocatalytic degradation of tetracycline by rod-like CoFe 2 O 4 /MWCNTs nanocomposite as a recyclable photocatalyst: a comprehensive study 棒状CoFe 2o /MWCNTs纳米复合材料作为可回收光催化剂的高效可见光光催化降解四环素的综合研究
4区 化学 Q3 CHEMISTRY, ANALYTICAL Pub Date : 2023-10-23 DOI: 10.1080/03067319.2023.2264787
Davis Varghese, Joe Raja Ruban Michael, Joselene Suzan Jennifer Patrick, AnnieCanisius Dominic, Albin John P. Paul Winston, Muthupandi Sankar, Madhavan Joseph, Santhanaraj Daniel, Victor Antony Raj Moses
ABSTRACTTetracycline (TC), a common antibiotic used to study bacterial illnesses in living organisms, is also exceedingly dangerous to the aquatic environment. Numerous traditional techniques are applied to remove the TC antibiotics from the water solution. However, these procedures have not helped to get rid of TC antibiotics. So, in this work, photocatalytic TC degradation has been considered. Hydrothermal synthesis was used to create the CoFe2O4/MWCNTs nano-composite, and various techniques were used to characterise it. The characterisation experiments revealed that multi-walled carbon nanotubes (MWCNTs) are successfully incorporated into cobalt ferrite spinel (CoFe2O4) nanoparticles and this limits the rate at which charge carriers recombine after combining with MWCNTs. The effectiveness of the catalyst was then evaluated in a batch reactor using the weight percentage variation of the nano-composite, specifically TC 0.5, TC 01, TC 02, TC 03, and TC 04, with constant pH 7, with TC concentration of 0.05 g/L and nano-composite dosage of 0.6 g/L for 120 min under 120 W/m2 of visible light. The same operational settings were used to study the TC degradation using CoFe2O4 and MWCNTs as individual pure materials. According to the findings, using CoFe2O4/MWCNTs with a weight percentage ratio of 1:4 (TC 04) increased the photocatalytic degradation efficiency to 90.00% compared to pure materials. After being utilised three times in a row, the photocatalysts were as-produced, and it was discovered that there was an approximate 2.7% decrease in removal efficiency. As a result of its comparatively straightforward synthesis, high stability, and high potential for recycling, CoFe2O4/MWCNTs nano-composite, specifically, TC 04, demonstrated a respectable efficiency in the TC degradation. Therefore, this material will make it possible to eliminate and degrade pharmaceutical organic contaminants.KEYWORDS: CoFe2O4/MWCNTsnanocompositetetracycline degradationvisible light kineticsdegradation mechanism AcknowledgmentsThe authors acknowledge Centennial Physics Ph.D. Instrumentation Centre, Department of Physics, Loyola College, Chennai-600 034.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplementary dataSupplemental data for this article can be accessed online at https://doi.org/10.1080/03067319.2023.2264787.
摘要四环素(tetracycline, TC)是一种常用的抗生素,用于研究生物体内的细菌疾病,但对水生环境也非常危险。许多传统技术被应用于从水溶液中去除TC抗生素。然而,这些程序并没有帮助摆脱TC抗生素。因此,本研究考虑光催化降解TC。采用水热合成法制备了CoFe2O4/MWCNTs纳米复合材料,并采用各种技术对其进行表征。表征实验表明,多壁碳纳米管(MWCNTs)被成功地结合到钴铁素体尖晶石(CoFe2O4)纳米颗粒中,这限制了载流子与MWCNTs结合后的重组速度。然后在间歇反应器中,在120 W/m2可见光下,采用纳米复合材料(TC 0.5、TC 01、TC 02、TC 03和TC 04)的重量百分比变化,在恒定pH 7下,TC浓度为0.05 g/L,纳米复合材料用量为0.6 g/L,反应120 min,评价催化剂的有效性。在相同的操作条件下,以CoFe2O4和MWCNTs作为单独的纯材料,研究了TC的降解。根据研究结果,使用重量百分比比为1:4 (tc04)的CoFe2O4/MWCNTs与纯材料相比,光催化降解效率提高到90.00%。连续使用三次后,光催化剂生产完成,发现去除率下降了约2.7%。CoFe2O4/MWCNTs纳米复合材料,特别是tc04,由于其相对简单的合成、高稳定性和高回收潜力,在降解TC方面表现出了可观的效率。因此,该材料将使消除和降解药物有机污染物成为可能。关键词:CoFe2O4/ mwcnts纳米复合材料四环素降解可见光动力学降解机理作者致谢:百年物理学博士,Loyola学院物理系仪器中心,金奈- 600034。披露声明作者未报告潜在的利益冲突。本文的补充数据可以在线访问https://doi.org/10.1080/03067319.2023.2264787。
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引用次数: 0
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International Journal of Environmental Analytical Chemistry
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