Journal of hazardous materials letters最新文献

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Comparative study on the microplastics abundance, characteristics, and possible sources in yellow clams of different demographic regions of the northwest coast of India 印度西北海岸不同人口区域黄蛤中微塑料丰度、特征及可能来源的比较研究
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100051
Bejawada Chanikya Naidu , K.A.Martin Xavier , Satya Prakash Shukla , Ashok Kumar Jaiswar , Binaya Bhusan Nayak
{"title":"Comparative study on the microplastics abundance, characteristics, and possible sources in yellow clams of different demographic regions of the northwest coast of India","authors":"Bejawada Chanikya Naidu ,&nbsp;K.A.Martin Xavier ,&nbsp;Satya Prakash Shukla ,&nbsp;Ashok Kumar Jaiswar ,&nbsp;Binaya Bhusan Nayak","doi":"10.1016/j.hazl.2022.100051","DOIUrl":"https://doi.org/10.1016/j.hazl.2022.100051","url":null,"abstract":"<div><p>Microplastics have become ubiquitous on the planet and are considered one of the biggest threats to life on earth. Several recent studies have addressed the serious risks that microplastics can pose to human health. In this study, the microplastic content and spatial variations in number, size, colour, and polymers from a highly urbanized cosmopolitan, urban, and rural coastal locations of the northwest Indian coast were documented using yellow clams. The mean incidence of microplastics across all the stations among the clams is found to be one of the highest ever reported worldwide, which is 35.93 MPs items/g in soft tissue parts and 91.42 MPs items/individual. The clams were found to have a higher microplastic diversity integrated index (MDII) and Microplastic index (MPI). The majority of the microplastics observed were fibres and fragments, belonged to the size range of 1–100 µm (51.36%), and were identified as HDPE, polystyrene, polymethyl methacrylate, polyvinyl chloride, polyamide, and polypropylene. The clam condition index (CI) was recorded high at the rural coast with lower population and lowest at the megacity having greater population which may indicate the negative effect of MPs on clams growth.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100051"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000041/pdfft?md5=183dedd47f4b6a99b7a3019641add68b&pid=1-s2.0-S2666911022000041-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137080941","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
Hydrogen-polarized vacuum ultraviolet photolysis system for enhanced destruction of perfluoroalkyl substances 用于增强全氟烷基物质破坏的氢极化真空紫外光解系统
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100072
Gongde Chen , Sitao Liu , Qingyang Shi , Jay Gan , Bosen Jin , Yujie Men , Haizhou Liu
{"title":"Hydrogen-polarized vacuum ultraviolet photolysis system for enhanced destruction of perfluoroalkyl substances","authors":"Gongde Chen ,&nbsp;Sitao Liu ,&nbsp;Qingyang Shi ,&nbsp;Jay Gan ,&nbsp;Bosen Jin ,&nbsp;Yujie Men ,&nbsp;Haizhou Liu","doi":"10.1016/j.hazl.2022.100072","DOIUrl":"10.1016/j.hazl.2022.100072","url":null,"abstract":"<div><p>Reductive water treatment using hydrated electrons (<span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span>) is a promising technology to destruct perfluoroalkyl substances; however, it faces challenges of slow reaction kinetics, undesirable chemical addition, and high energy consumption. Herein, we developed a hydrogen (H<sub>2</sub>)-polarized water photolysis system using vacuum UV (VUV) light at 185 nm for reductive destruction of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS). The 185-nm photons directly photolyzed H<sub>2</sub>O and OH<sup>-</sup> into HO·, H·, and <span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span>. H<sub>2</sub> elevated the <em>quasi</em> steady-state concentration of <span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span> 18 times in untuned VUV systems through eliminating the scavenging effect of dissolved oxygen and converting hydroxyl radicals (HO·/O·<sup>-</sup>) into <span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span>. The polarization effect of H<sub>2</sub> increased the degradation of PFOA from 10 % to 95 % and the defluorination from 17 % to 94 % and led to 87 % of defluorination for PFOS. The pH impacted VUV photon adsorption between H<sub>2</sub>O and OH<sup>-</sup> and shifted the equilibrium between H· and <span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span>, which led to an optimal pH of 10.3 for PFOA destruction. The presence of chloride and sulfate enhanced the production of <span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span> and promoted PFOA destruction. H<sub>2</sub>-polarized VUV water photolysis systems produced high levels of <span><math><msubsup><mrow><mi>e</mi></mrow><mrow><mi>aq</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span> from clean water constituents and significantly reduced energy consumption for PFAS treatment under mild alkaline conditions.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000259/pdfft?md5=408d08ba5134e9573cbcd961eddba977&pid=1-s2.0-S2666911022000259-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46190258","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: 2
Efficacy of Pseudomonas sp. and Bacillus sp. in textile dye degradation: A combined study on molecular identification, growth optimization, and comparative degradation 假单胞菌和芽孢杆菌降解纺织染料的效果:分子鉴定、生长优化和比较降解的综合研究
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100068
Sultana Afrin Jahan Rima , Gobindo Kumar Paul , Shirmin Islam , Md. Akhtar-E-Ekram , Shahriar Zaman , Md. Abu Saleh , Md. Salah Uddin
{"title":"Efficacy of Pseudomonas sp. and Bacillus sp. in textile dye degradation: A combined study on molecular identification, growth optimization, and comparative degradation","authors":"Sultana Afrin Jahan Rima ,&nbsp;Gobindo Kumar Paul ,&nbsp;Shirmin Islam ,&nbsp;Md. Akhtar-E-Ekram ,&nbsp;Shahriar Zaman ,&nbsp;Md. Abu Saleh ,&nbsp;Md. Salah Uddin","doi":"10.1016/j.hazl.2022.100068","DOIUrl":"10.1016/j.hazl.2022.100068","url":null,"abstract":"<div><p>One of the greatest environmental concerns in the world is thought to be the effluents from the textile industry. The use of synthetic dyes in textiles makes the traditional method of treating textile effluents more difficult. Microorganisms can be used to remediate the damage that textile dyes do to the environment. In this investigation, two bacterial strains with the capacity of degrading dye were isolated from textile waste and identified as <em>Pseudomonas</em> sp. (Accession no. NR 117,678.1) and <em>Bacillus</em> sp. (Accession no: NR148248.1) through morphological, biochemical, and molecular test. The cytotoxicity of this wastewater on <em>Artemia salina</em> and phytotoxicity on <em>Triticum aestivum</em> were also investigated using brine shrimp lethality assay and plant growth analysis, respectively. Wheat seed germination was adversely affected by wastewater containing dyes, but subsequently germination was enhanced when the wastewater was treated by the isolated strains. <em>Pseudomonas</em> sp. degraded pink and green dyes more effectively than <em>Bacillus</em> sp., according to results of a comparison of the two bacteria's dye-degrading capacities using the spectrophotometric method. The dye degrading capacity of the bacteria was validated by the HPLC analysis. Therefore, both <em>Pseudomonas</em> species and <em>Bacillus</em> species could be used as efficient bacteria in the large-scale treatment of textile effluents.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100068"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000211/pdfft?md5=0e61940b10db0173dbeb04bdc9aa649f&pid=1-s2.0-S2666911022000211-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48410230","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: 5
Efficacy of emerging technologies in addressing reductive dechlorination for environmental bioremediation: A review 新兴技术在环境生物修复中的还原性脱氯效果综述
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100065
Nalok Dutta , Muhammad Usman , Muhammad Awais Ashraf , Gang Luo , Shicheng Zhang
{"title":"Efficacy of emerging technologies in addressing reductive dechlorination for environmental bioremediation: A review","authors":"Nalok Dutta ,&nbsp;Muhammad Usman ,&nbsp;Muhammad Awais Ashraf ,&nbsp;Gang Luo ,&nbsp;Shicheng Zhang","doi":"10.1016/j.hazl.2022.100065","DOIUrl":"10.1016/j.hazl.2022.100065","url":null,"abstract":"<div><p>Reductive dechlorination is a core pathway of chlorination in an anaerobic environment, which can be carried out by fermentative, methanogenic, iron and sulfate-reducing microorganisms. The present review showed the different metabolic ways of microbes with the emphasis on the anaerobic microbial dechlorination (including chemical, biological and nanotechnology-based strategies), that have been employed to mitigate the chlorinated pollutants. Chemical and nanomaterial science has made substantial advancement in several aspects of dechlorination over the past two decades, providing information about the process and the outcome of the reaction. However, these chemical processes are expensive to start with and pose ecological hazards. So, extensive research has been done to come up with eco-friendly biological alternatives). Under anaerobic conditions, dehalorespiring bacteria are capable of dechlorinating chloroethenes by mediating a stepwise replacement of chlorine with hydrogen resulting in the sequential conversion of perchloroethylene (PCE) to trichloroethylene (TCE), dichloroethylene (DCE) isomers, vinyl chloride (VC), and finally, ethane. Among many dehalorespiring bacterial isolates, only a few strains of the genus <em>Dehalococcoides</em> completely converted the chloroethenes to nontoxic ethane. In the paper we will, therefore, focus on this <em>Dehalococcoides spp.</em> Several factors influence the dechlorination activity between different dehalogenating bacteria. The vcrA and bvcA genes dechlorinate VC into ethene, which are essential for complete dechlorination. These pathways offer understanding of potential bioremediation of chlorinated aliphatic or aromatic compounds by <em>Dehalococcoides</em> with the likelihood of highly effective bioremediation.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100065"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000181/pdfft?md5=56635a9ccc761f79d51985923ddd0596&pid=1-s2.0-S2666911022000181-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42478453","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: 3
Enhancing the degradation of selected recalcitrant organic contaminants through integrated cathode and anode processes in microbial electrochemical systems: A frontier review 在微生物电化学系统中,通过集成的阴极和阳极过程来增强对某些顽固性有机污染物的降解:前沿综述
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100057
Kaichao Yang , Ibrahim M. Abu-Reesh , Zhen He
{"title":"Enhancing the degradation of selected recalcitrant organic contaminants through integrated cathode and anode processes in microbial electrochemical systems: A frontier review","authors":"Kaichao Yang ,&nbsp;Ibrahim M. Abu-Reesh ,&nbsp;Zhen He","doi":"10.1016/j.hazl.2022.100057","DOIUrl":"10.1016/j.hazl.2022.100057","url":null,"abstract":"<div><p>Microbial electrochemical system (MES) technology has been widely investigated for organic degradation. However, the removal of recalcitrant organic contaminants containing halogen-, nitro-, or azo-groups remains a great challenge. Integrating the cathodic and anodic processes in an MES is able to improve or complete the mineralization of the target halogen-, nitro- and azo-organics via a sequential reductive and oxidative process. In this way, a cathode is used to reduce the toxic target organics, while an anode is to oxidize the residual organics from the reduction process and at the same time generate electrons to support the reduction process. This paper has provided a concise review about the sequential cathode-anode contaminant degradation in an MES and its specific mechanisms. Potential strategies to improve the MES degradation performance were discussed, mainly including the application and development of the biocatalyzed cathode as well as the optimization of the anodic operating condition and the improvement of anodic bacteria and electrode material. Perspectives on future directions were proposed and the key challenges were identified as the competitive or inhibitive influence of other compounds that could coexist in real wastewater on the target contaminants.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100057"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000107/pdfft?md5=72d579441103fb07309c5b3d7f7f59ae&pid=1-s2.0-S2666911022000107-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44772939","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: 5
Selective and efficient mercury(II) removal from water by adsorption with a cellulose citrate biopolymer 柠檬酸纤维素生物聚合物吸附水中的选择性和高效汞(II)去除
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100060
Antonio Tursi , Valentina Gallizzi , Fabrizio Olivito , Vincenzo Algieri , Antonio De Nino , Loredana Maiuolo , Amerigo Beneduci
{"title":"Selective and efficient mercury(II) removal from water by adsorption with a cellulose citrate biopolymer","authors":"Antonio Tursi ,&nbsp;Valentina Gallizzi ,&nbsp;Fabrizio Olivito ,&nbsp;Vincenzo Algieri ,&nbsp;Antonio De Nino ,&nbsp;Loredana Maiuolo ,&nbsp;Amerigo Beneduci","doi":"10.1016/j.hazl.2022.100060","DOIUrl":"10.1016/j.hazl.2022.100060","url":null,"abstract":"<div><p>Mercury is a global pollutant, very dangerous for the aquatic ecosystems and for human health. The sources of mercury in the environment are either anthropogenic or natural. However, historical mining activities and current anthropogenic activities, have led to a significant increase of its level in the environment. Its removal by efficient and cost-effective technologies, is of the utmost importance in order to help restore it back towards natural levels. Here we show that a novel cellulose citrate biopolymer, produced by the reaction of cellulose and citric acid, is an efficient adsorbent of inorganic mercury with a distribution constant close to 10<sup>5</sup> l/g and an estimated record high maximum adsorption capacity of 1600 mg/g. Moreover, due to the large fraction of citrate moieties on its surface, its adsorption selectivity toward inorganic mercury, is the highest after that for Pb(II), among a series of divalent heavy metals, in different aqueous matrices. Finally, cellulose citrate can be reused for several adsorption cycles by a simple regeneration process without significant adsorption performance loss.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100060"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000132/pdfft?md5=8d43aa3faeed57c966ba5403414760f3&pid=1-s2.0-S2666911022000132-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44874689","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: 14
Synthesis design of Cu/Al2O3 catalysts to decrease copper leaching in the catalytic wet peroxide oxidation of phenol Cu/Al2O3催化剂的合成设计,以减少苯酚湿式过氧化氧化中铜的浸出
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100059
N.A. Sacco , M.E. Lovato , F.A. Marchesini , A.V. Devard
{"title":"Synthesis design of Cu/Al2O3 catalysts to decrease copper leaching in the catalytic wet peroxide oxidation of phenol","authors":"N.A. Sacco ,&nbsp;M.E. Lovato ,&nbsp;F.A. Marchesini ,&nbsp;A.V. Devard","doi":"10.1016/j.hazl.2022.100059","DOIUrl":"10.1016/j.hazl.2022.100059","url":null,"abstract":"<div><p>This work aims to study the catalytic performance of Cu/Al<sub>2</sub>O<sub>3</sub> catalysts in the catalytic reaction of oxidation of phenol. The addition of La and Mn to Al<sub>2</sub>O<sub>3</sub> support and the calcination temperature influence on the catalytic performance and Cu leaching were studied. The addition of either La or Mn to the support triggered less Cu leaching compared to the unmodified support. The catalysts modified with Mn and calcined at 650ºC and 900 °C yielded low Cu leaching values and high phenol conversions at 120 min of reaction, achieving total consumption of H<sub>2</sub>O<sub>2</sub>. The catalysts prepared in the same way but modified with La and calcined at 900 °C, achieved 100% phenol conversion and higher TOC conversion. Copper leaching was higher when the support was modified with La, but improved when compared to the unmodified support, suggesting that the presence of Mn allowed a better anchoring of Cu on the support. However, this was not beneficial for the reaction since a certain amount of Cu in the homogeneous phase was required for the reaction to start. Cu-La-Al<sub>2</sub>O<sub>3</sub> showed stability after consecutive reaction cycles with the corresponding calcinations in each cycle.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100059"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000120/pdfft?md5=633db766bdfa3c880042bc6a5751aa79&pid=1-s2.0-S2666911022000120-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43949047","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: 3
Erratum to “Method for derivatization and isotopic analysis of the insensitive munition compound 3-nitro-1,2,4-triazol-5-one (NTO)” [J. Hazard. Mater. Lett. 2 (2021) 100044] “不敏感弹药化合物3-硝基-1,2,4-三唑-5-酮(NTO)的衍生化和同位素分析方法”的勘误[J]。风险。板牙。Lett. 2 (2021) 100044]
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100062
Chunlei Wang , Linnea J. Heraty , Haibo Li , Mark E. Fuller , Paul B. Hatzinger , Neil C. Sturchio
{"title":"Erratum to “Method for derivatization and isotopic analysis of the insensitive munition compound 3-nitro-1,2,4-triazol-5-one (NTO)” [J. Hazard. Mater. Lett. 2 (2021) 100044]","authors":"Chunlei Wang ,&nbsp;Linnea J. Heraty ,&nbsp;Haibo Li ,&nbsp;Mark E. Fuller ,&nbsp;Paul B. Hatzinger ,&nbsp;Neil C. Sturchio","doi":"10.1016/j.hazl.2022.100062","DOIUrl":"10.1016/j.hazl.2022.100062","url":null,"abstract":"","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100062"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000156/pdfft?md5=7f3e99753e22390f6d137f433fc715eb&pid=1-s2.0-S2666911022000156-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41385119","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
Degradation of 1,4-dioxane by reactive species generated during breakpoint chlorination: Proposed mechanisms and implications for water treatment and reuse 断点氯化过程中产生的反应物质对1,4-二恶烷的降解:提出的机制及其对水处理和回用的影响
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100054
Samuel D. Patton , Michael C. Dodd , Haizhou Liu
{"title":"Degradation of 1,4-dioxane by reactive species generated during breakpoint chlorination: Proposed mechanisms and implications for water treatment and reuse","authors":"Samuel D. Patton ,&nbsp;Michael C. Dodd ,&nbsp;Haizhou Liu","doi":"10.1016/j.hazl.2022.100054","DOIUrl":"10.1016/j.hazl.2022.100054","url":null,"abstract":"<div><p>Breakpoint chlorination, an important chemical process relevant to chlorine-based advanced oxidation processes for potable reuse and to traditional water treatment, was investigated for its oxidative capacity, generation of reactive species, and potential impacts on organic contaminant degradation. This work describes a newly recognized HO<sup>•</sup> radical generation pathway during breakpoint chlorination that may play an important role in water treatment and examines the behavior of the HO<sup>•</sup> radical and other related reactive species and their potential formation pathways. Experimental data showed that the removal of 1,4-dioxane (1,4-D) positively correlated with chlorine-to-ammonia molar ratio until a molar ratio of ~1.5–2.0 was reached, above which removal efficiency rapidly decreased. Peroxynitrite (ONOO<sup>–</sup>) and peroxynitrous acid (ONOOH) are proposed as important radical sources that lead to the formation of HO<sup>•</sup> in the breakpoint process. This is supported by application of <em>tert</em>-butanol as a selective HO<sup>•</sup> scavenger and the observation that the amendment of reaction solutions with carbonate species suppressed oxidative capacity to a much greater extent than expected based solely on scavenging of HO<sup>•</sup> by H<sub>2</sub>CO<sub>3</sub> * /CO<sub>2</sub> and HCO<sub>3</sub><sup>–</sup> (apparently due to selective scavenging of ONOOH/ONOO<sup>–</sup> by dissolved CO<sub>2</sub>). These experiments also provided evidence that reactive species other than HO<sup>•</sup> contributed to 1,4-D oxidation. The results of this study suggest that breakpoint chlorination can lead to significant degradation of organic contaminants via ONOOH/ONOO<sup>–</sup>-mediated formation of HO<sup>•</sup> and other reactive species and may potentially be optimized for enhanced removal of recalcitrant organic contaminants in the context of water reuse, though with due caution to the potential for enhancement of nitrogenous and other disinfection byproduct formation under such conditions.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100054"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000077/pdfft?md5=463e45e901196454755b7e4799362c3c&pid=1-s2.0-S2666911022000077-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47232629","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: 7
Water quality modelling framework for evaluating antibiotic resistance in aquatic environments 用于评估水生环境中抗生素耐药性的水质建模框架
Journal of hazardous materials letters Pub Date : 2022-11-01 DOI: 10.1016/j.hazl.2022.100056
Mahesh Jampani, Ritu Gothwal, Javier Mateo-Sagasta, Simon Langan
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引用次数: 9
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