Desalination and Water Treatment最新文献_第2页

Optimizations for tunnel drainage water system based on locations of crystallizations 基于结晶位置的隧道排水系统优化

4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29681

Zhuanghong Lin, Kuangda Liu, Xuefu Zhang, Xiangge Chen, Peng Xie, Yong Tan

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Aqueous bromate (BrO3-) removal using FILTRASORB 400 activated carbon: effect of process variables and modeling 使用FILTRASORB 400活性炭去除水中溴酸盐(BrO3-):工艺变量和建模的影响

4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29671

Muhammad Vohra, Abdullah Basaleh, Fayzul Kabir, Mohammad Al-Suwaiyan, Mehvish Bilal

{"title":"Aqueous bromate (BrO3-) removal using FILTRASORB 400 activated carbon: effect of process variables and modeling","authors":"Muhammad Vohra, Abdullah Basaleh, Fayzul Kabir, Mohammad Al-Suwaiyan, Mehvish Bilal","doi":"10.5004/dwt.2023.29671","DOIUrl":"https://doi.org/10.5004/dwt.2023.29671","url":null,"abstract":"Aqueous phase bromate (BrO 3– ) treatment using a commercial granular activated carbon (GAC, FILTRASORB 400) indicated that bromate removal is highly influenced by the operational factors such as pH, initial bromate concentration, contact time and the adsorbent dosage. The effect of pH on bromate treatment indicated higher to significant bromate removal at pH ≤ 4, whereas for pH range 5–9 ~ 50% bromate removal was noted. At pH higher than 9, a significant decrease in the bro - mate removal was noted that was ascribed to changes in the GAC surface speciation. Furthermore, a higher mass-based bromate removal transpired with an increase in the initial bromate concen - tration that was explained based on higher mass transfer and diffusion. Also, the bromate adsorp - tion experimental data fitted well to the Freundlich adsorption isotherm, indicating a multilayer bromate ions accumulation on the GAC surface. Furthermore, an increasing ‘ q e vs. C e ’ trend also implied a multilayer bromate ions attachment on the GAC surface. Moreover, the kinetics exper - iments showed that the pseudo-second-order kinetic model better describes the respective GAC-based bromate removal as compared to pseudo-first-order kinetic model. This indirectly indicated that the removal of bromate using granular activated carbon is a more involved process, with both adsorption and reduction causing the noted bromate removal ( GAC-BrO 3 ↔ GAC-BrO ↔ GAC -Br). It is suggested that initially the adsorbed BrO 3 – ion is reduced to BrO – (hypobromite) followed by a further reduction of BrO – to Br – (bromide) ion. Additionally, as the surface bound bromate ion is reduced to bromide, it would cause further mass transfer of solution phase bromate ion towards the GAC surface, which is also indirectly supported by the aforementioned Freundlich based multilayer bromate removal trend.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Monitoring of interannual variabilities of glacial lakes at the end of A’nyemaqen glacier utilizing PolSAR images 利用PolSAR影像监测阿尼马琴冰川末端冰川湖泊的年际变化

4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29693

Rui Guo, Qiming Zeng

引用次数: 0

Contents Vol. 294 目录第294卷

IF 1.1 4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29711

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CFD simulation optimization of a swirling vortex cavitator and its oxytetracycline degradation characteristics: kinetics and degradation pathway 涡旋空化器及其土霉素降解特性的CFD模拟优化:动力学与降解途径

IF 1.1 4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29382

Bao’e Wang, Rihong Zhang, Yiyong Li, Xiaomin Lian

{"title":"CFD simulation optimization of a swirling vortex cavitator and its oxytetracycline degradation characteristics: kinetics and degradation pathway","authors":"Bao’e Wang, Rihong Zhang, Yiyong Li, Xiaomin Lian","doi":"10.5004/dwt.2023.29382","DOIUrl":"https://doi.org/10.5004/dwt.2023.29382","url":null,"abstract":"Vortex cavitation may be harnessed to intensify many industrial processes. It is essential to develop a highly efficient vortex cavitator for refractory organics degradation. In the present work, a novel swirling vortex cavitator designed with a special structure of six vortex cavities and spiral flow passages was optimized using computational fluid dynamics (CFD) method by the aid of Gambit software and ANSYS fluid simulation software, and its oxytetracycline degradation characteris tics were investigated. The optimized vortex cavitaor was superior to the original vortex cavitator resulting from more hydroxyl radicals generated during operation and higher oxytetracycline deg radation efficiencies. The degradation efficiency was 89.52% and 92.41% of about 2.0 mg/L initial concentration of oxytetracycline in 10 L solution at 80 min by the original and optimized swirling vortex cavitator, respectively. The optimized vortex cavitator also showed good oxytetracycline deg radation ability in aquaculture simulation wastewater. All the degradation processes followed the secondorder kinetics model. In the two degradation pathways, multiple byproducts were gener ated by dealkylation, deamination, dihydroxylation and ringopening induced by vortex cavitation effect.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"12 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87476374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of crystal violet dye from aqueous solution by activated sewage treatment plant sludge 活性污水处理厂污泥对水溶液中结晶紫染料的吸附研究

IF 1.1 4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29210

Priyanka Shrivastava, M. Dwivedi, V. Malviya, P. Jain, A. Yadav, N. Jain

引用次数: 0

Preparation and application of coconut shell-based skeleton particles coupled with hydroxypropyltrimethyl ammonium chloride chitosan in sludge dewatering 椰壳骨架颗粒-羟丙基三甲基氯化铵壳聚糖的制备及其在污泥脱水中的应用

4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29658

Shici Zhang, Ying Zhang, Haohan Xu, Qi Liu, Xiang Wan, Jiajia Xia, Longkai Li, Hui Zhang, Xujie Lu

{"title":"Preparation and application of coconut shell-based skeleton particles coupled with hydroxypropyltrimethyl ammonium chloride chitosan in sludge dewatering","authors":"Shici Zhang, Ying Zhang, Haohan Xu, Qi Liu, Xiang Wan, Jiajia Xia, Longkai Li, Hui Zhang, Xujie Lu","doi":"10.5004/dwt.2023.29658","DOIUrl":"https://doi.org/10.5004/dwt.2023.29658","url":null,"abstract":"The sludge dewatering is a significant part of municipal wastewater treatment industry, and efficient disposal techniques for the sludge dewatering is still a challenge among worldwide environmental fields. To achieve sludge reduction, the research and exploitation of environment-friendly natural polymer dehydrating agents have caused broad attention. In this study, a coconut shell-based composite was prepared by grafting hydroxypropyltrimethyl ammonium chloride chitosan (HACC) on the surface of coconut shell skeleton particles as a novel type of dewatering agent. The response surface methodology was used to optimize the preparation process of grafted coco-nut shell-based skeleton particles. The consumption per unit area of HACC could reach 0.1732 g/g under the optimal preparation conditions: reaction temperature at 40°C, material particle size at 120–200 mesh, mass ratio of M1:M2 at 0.75 without dilution, and ultrasonic time for 5 min. Compared to the composites without graft, the dewatering rate of sludge was obviously improved by the grafted coconut shell-based composites under the same treatment procedures. Moreover, the grafted coconut shell-based composite also possessed the potential for effectively adsorbing the total organic matters in sludge dewatering filtrate. This work provides a promising dehydrating agent and disposal method for the practical application of municipal sludge dewatering.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Author Index Vol. 282 作者索引第282卷

IF 1.1 4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29402

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Future vision of using nuclear energy for desalination plants in Egypt 在埃及的海水淡化厂使用核能的未来愿景

IF 1.1 4区工程技术

Desalination and Water Treatment Pub Date : 2023-01-01 DOI: 10.5004/dwt.2023.29511

Mohamed K. Shaat, L. Shouman, D. A. Fadel

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Photocatalytic properties of bismuth oxyiodide nanomaterials with different morphologies 不同形态氧化碘化铋纳米材料的光催化性能

IF 1.1 4区工程技术