Journal of Environmental Chemical Engineering最新文献_第10页

Edge functionalized with benzenesulfonyl groups of g-C3N4 nanosheets as a highly efficient photocatalyst for water purification 边缘功能化苯磺酰基 g-C3N4 纳米片作为高效光催化剂用于水净化

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114207

Xiangrong Li , Qiang Liu , Wen Xiao , Shuai An , Jun Xiao

{"title":"Edge functionalized with benzenesulfonyl groups of g-C3N4 nanosheets as a highly efficient photocatalyst for water purification","authors":"Xiangrong Li , Qiang Liu , Wen Xiao , Shuai An , Jun Xiao","doi":"10.1016/j.jece.2024.114207","DOIUrl":"10.1016/j.jece.2024.114207","url":null,"abstract":"<div>Photocatalytic water purification is a promising method for environmental remediation, but it is greatly hindered by the rapid charge carrier recombination behavior of the photocatalysts. Herein, a simple wet-chemical method is developed for grafting electron-withdrawing benzenesulfonyl groups at the edges of g-C3N4 nanosheets. These exhibited a superior and versatile photocatalytic performance on the degradation of organic contaminant, as well as disinfected Escherichia coli (E. coli) bacteria under visible light illumination. Systematic studies reveal that the grafting of benzenesulfonyl groups led to the synergic effect in ultrathin g-C3N4 nanosheets of enhancing the photogenerated charge carrier separation on surface, improving light absorption, changing electronic band structure, and causing surface charge redistribution, all of which are beneficial for enhancing the photocatalytic performance. Notably, these edge-activated g-C3N4 photocatalysts also demonstrate remarkable photocatalytic activity in the real tap water and urban wastewater, indicating their promising potential for application in real wastewater treatment.</div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114207"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A new strategy for the comprehensive utilization of wastewater from the production of soda ash by sodium sulfate-based ammonia-soda process 硫酸钠氨碱法纯碱生产废水综合利用新战略

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114198

Wanling Zhong , Xin Wang , Yanqing Lai , Shenghai Yang , Shengming Jin , Kun Liu

{"title":"A new strategy for the comprehensive utilization of wastewater from the production of soda ash by sodium sulfate-based ammonia-soda process","authors":"Wanling Zhong , Xin Wang , Yanqing Lai , Shenghai Yang , Shengming Jin , Kun Liu","doi":"10.1016/j.jece.2024.114198","DOIUrl":"10.1016/j.jece.2024.114198","url":null,"abstract":"<div><div>The production of soda ash by the ammonia-soda process using carbon dioxide and ammonia for sodium sulfate is an effective method to realize the comprehensive utilization of waste resources of sodium sulfate, but this method produces a large amount of wastewater whose main substances are sodium bicarbonate and ammonium sulfate, which limits the modular industrial application of the production of soda ash by sodium sulfate-based ammonia-soda process(SSA-Process). At present, the main utilization method for the wastewater from the production of soda ash by SSA-Process is evaporation crystallization method to deal with the by-products of sodium sulfate and ammonium sulfate, which is a low-value, complex and energy-consuming process, so is an urgent need for a low-cost, high-value, short-process method to comprehensively utilize wastewater from the production of soda ash by SSA-Process. Based on the application theory of calcium hydroxide (Ca(OH)2) in the traditional ammonia-soda process, this present study systematically investigated the causticization law and mechanism of Ca(OH)2 in a simulated wastewater from the production of soda ash by SSA-Process. On this basis, a new process of Ca(OH)2 segmented causticization was developed to realize the comprehensive utilization of wastewater from production of soda ash by SSA-Process. The results showed that this process enabled a highly efficient ammonia cycle for cost reduction and the production of high purity ultrafine calcium carbonate products and sodium sulfate solids, as well as calcium-based raw material for building materials.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114198"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A novel sulfur-based fiber carrier fixed-bed reactor for nitrate-contaminated wastewater treatment: Performance, operational characteristics and cold-tolerant mechanism 用于硝酸盐污染废水处理的新型硫基纤维载体固定床反应器：性能、运行特点和耐寒机制

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114203

Mingdong Chang , Xiubo Chen , Jian Shen , Tong Zhu , Tangfu Xiao , Jianqiao Wang , Chao Wang , Youzhao Wang

{"title":"A novel sulfur-based fiber carrier fixed-bed reactor for nitrate-contaminated wastewater treatment: Performance, operational characteristics and cold-tolerant mechanism","authors":"Mingdong Chang , Xiubo Chen , Jian Shen , Tong Zhu , Tangfu Xiao , Jianqiao Wang , Chao Wang , Youzhao Wang","doi":"10.1016/j.jece.2024.114203","DOIUrl":"10.1016/j.jece.2024.114203","url":null,"abstract":"<div><div>In the view of the serious prejudice of nitrates, sulfur-based autotrophic denitrification filter (SADF) has been widely used for deep nitrate removal from electron-donor-deficient water. However, it faces many challenges like slow start-up, reliance on backwashing, and poor low-temperature tolerance. For these challenges, a novel sulfur-based fiber carrier fixed bed reactor (SFFR) was developed in this study. It was found that SFFR had great film-forming ability and flow field characteristics, which promoted it to obtain superior denitrification performance, and the maximum nitrogen removal rate of 0.53 kg-N/m3/d. Meanwhile, SFFR shows significant cold tolerance, and alleviating the acidification problem of effluent to a certain extent. To sum up, the SFFR possesses the potential to be widely used in real-world wastewater treatment applications, especially as a promising solution for nitrate removal in cold regions. This study can provide an important reference for the improvement of the elemental sulfur autotrophic denitrification process.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114203"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ambient pressure carbonation curing of cold-bonded fly ash lightweight aggregate using coal-fired flue gas for properties enhancement and CO2 sequestration 利用燃煤烟气对冷粘结粉煤灰轻质骨料进行常压碳化固化，以提高其性能并封存二氧化碳

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114208

Xiaoyan Yao , Bing Song , Qun Huan , Yue Hu , Min Song

{"title":"Ambient pressure carbonation curing of cold-bonded fly ash lightweight aggregate using coal-fired flue gas for properties enhancement and CO2 sequestration","authors":"Xiaoyan Yao , Bing Song , Qun Huan , Yue Hu , Min Song","doi":"10.1016/j.jece.2024.114208","DOIUrl":"10.1016/j.jece.2024.114208","url":null,"abstract":"<div>In the current CO2 curing process, pure CO2 gas with a concentration exceeding 99 % is primarily used. However, flue gas, which typically contains 10–30 % CO2, can also be utilized for carbonization. This study sought to explore the viability of employing flue gas for carbonation and assessed the impact of impurity gases such as SO2. Two typical industrial solid wastes (fly ash and coal gangue) were used to substitute a portion of the cement to prepare light aggregates, which were carbonized under varying concentrations of CO2 and SO2. The porosity and water absorption of the samples decreased after carbonation. A higher degree of carbonation was observed at increasing CO2 concentration. Aggregates carbonated with 15 % CO2 improved the CO2 absorption by 48 %. The actual CO2 uptake reached up to 58.3 % of the theoretical value. The presence of SO2 has been found to impact the uptake of CO2. The CO2 uptake initially declined and then increased as the SO2 concentration increased. The existence of SO2 led to varied increases in the leaching concentrations of the aggregates following the process of carbonation, and some even exceed standard limits. In the presence of both CO2 and SO2, SO2 reacted with the aggregates, resulting in the creation of calcium sulfate. This reaction disrupted the structure of the aggregate, facilitating the diffusion of CO2 into the samples.</div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114208"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Enhanced hydrolytic acidification with Zero-Valent Iron for efficient treatment of comprehensive wastewater from industrial parks: Mechanistic insights and toxicity reduction 利用零价铁强化水解酸化，高效处理工业园区的综合废水：机理认识与毒性降低

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114212

Duanhao Wang , Yanling Feng , Jun Li , Yifan Feng , Chunlei Yang , Yechao Tian , Yang Pan , Xun Chen , Quanxing Zhang , Aimin Li

{"title":"Enhanced hydrolytic acidification with Zero-Valent Iron for efficient treatment of comprehensive wastewater from industrial parks: Mechanistic insights and toxicity reduction","authors":"Duanhao Wang , Yanling Feng , Jun Li , Yifan Feng , Chunlei Yang , Yechao Tian , Yang Pan , Xun Chen , Quanxing Zhang , Aimin Li","doi":"10.1016/j.jece.2024.114212","DOIUrl":"10.1016/j.jece.2024.114212","url":null,"abstract":"<div><div>In this study, a laboratory-scale zero-valent iron (ZVI)-enhanced hydrolytic acidification system was established to treat the comprehensive wastewater from Nanjing Jiangbei New Material Science Technology Park. Results indicated that the ZVI-enhanced hydrolytic acidification system achieved a maximum COD removal efficiency of 95.0 %, surpassing the performance of the system without ZVI by 12.2 %. Microbial community analysis revealed the enrichment of electrogenic bacterium Bacteroidetes_vadinHA17 and typical hydrogenotrophic methanogen Methanobacterium due to ZVI addition. High-throughput sequencing combined with PICRUSt2 analysis demonstrated acetate production was promoted, and butyrate and propionate production was inhibited. Additionally, Oxygen Uptake Rate-based toxicity assays revealed the hydrolytic acidification system transitioned the wastewater of three enterprises from low toxicity to non-toxic status and two from high to low toxicity. While the ZVI-enhanced hydrolytic acidification system successfully reduced the toxicity of all highly and low toxic wastewaters to non-toxic levels.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114212"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nitrogen-oxygen defect engineering enhanced intrinsic electric field in CoFe2O4/g-C3N4 heterojunctions for photocatalytic tetracycline degradation and H2 evolution 氮氧缺陷工程增强 CoFe2O4/g-C3N4 异质结中的本征电场，用于光催化四环素降解和 H2 演化

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114202

Wentao Miao , Wei He , Lei Shen , Yuguang Li , Zheng Fang , Zhao Yang , Guo Kai

{"title":"Nitrogen-oxygen defect engineering enhanced intrinsic electric field in CoFe2O4/g-C3N4 heterojunctions for photocatalytic tetracycline degradation and H2 evolution","authors":"Wentao Miao , Wei He , Lei Shen , Yuguang Li , Zheng Fang , Zhao Yang , Guo Kai","doi":"10.1016/j.jece.2024.114202","DOIUrl":"10.1016/j.jece.2024.114202","url":null,"abstract":"<div><div>A range of efficient g-C3N4/CoFe2O4 heterojunction with nitrogen deficiencies (NDs) and oxygen deficiencies (ODs) were successfully synthesized through doping-melting and hydrothermal methods. Nitrogen-oxygen defect engineering effectively enhanced the active sites on the catalyst surface and regulated the optical bandgap, band structure, and work function (Φ) of g-C3N4 and CoFe2O4, regulating the strength of the intrinsic electric field (IEF) and promoting the separation of photo-generated carriers at the heterojunction interface. Among the series of samples, CH-H2@CFO-A5 (properly oxalate-doped g-C3N4/CoFe2O4 heterojunctions treated with prolonged annealing) demonstrated remarkable optical properties due to its narrowest optical band gap, while the strongest IEF and redox potential make it has strong carrier dynamics and photocatalytic efficiency. Under visible light, the mineralization rate of tetracycline (TC) on CH-H2@CFO-A5 and the photocatalytic hydrogen production rate were 4.51 times and 2.72 times higher than that of unmodified CN-H0@CFO-A1, respectively. This study aimed to provide an efficient strategy for regulating the IEF within the heterojunction, by altering the Fermi level through multi-element defect engineering.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114202"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Capability and mechanism of Cr(VI) removal by phthalic acid modified sulfidated microscale zero valent iron 邻苯二甲酸改性硫酸化微尺度零价铁去除六价铬的能力和机理

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114214

Haowen Zou , Wenqiang Xu , Shuaixuan Ying , Shichao Cai , Bo Chen , Ping Wang , Zhongkuan Wu , Feng He

{"title":"Capability and mechanism of Cr(VI) removal by phthalic acid modified sulfidated microscale zero valent iron","authors":"Haowen Zou , Wenqiang Xu , Shuaixuan Ying , Shichao Cai , Bo Chen , Ping Wang , Zhongkuan Wu , Feng He","doi":"10.1016/j.jece.2024.114214","DOIUrl":"10.1016/j.jece.2024.114214","url":null,"abstract":"<div><div>Mechanochemically sulfidated microscale zero valent iron (S-mZVIbm) exhibits promising Cr(VI) removal performance but is prone to be passivated by Cr(VI), how to mitigate the passivation is still a challenge. In this study, we successfully synthesized phthalic acid (PA, carboxyl-rich organic acid) modified S-mZVIbm particles (PA-S-mZVIbm (4:1)) through ball milling. The pre-corrosion of the ZVI surface by PA effectively increased the specific surface area of ZVI. Additionally, the carboxyl groups complexed with Cr(VI), thereby enhancing its Cr(VI) removal capacity and alleviating the passivation. The Cr(VI) removal by PA-S-mZVIbm (4:1) was mainly a chemisorption process on the surface and its Cr(VI) removal capacity (55.47 mg/g) was 1.26 and 9.94 – 14.83 times that of PA-mZVIbm and S-mZVIbm, respectively. The electron efficiency of Cr(VI) removal by both PA-S-mZVIbm (4:1) and S-mZVIbm was ∼100 %, however, the Fe(0) utilization efficiency of PA-S-mZVIbm (4:1) was at least 15 times higher than that of S-mZVIbm, explaining the superior performance of PA-S-mZVIbm (4:1). This study confirmed that PA modification could effectively mitigate the passivation and improve the Fe(0) utilization efficiency of S-mZVIbm.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114214"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Efficient tetracycline degradation via flow-through peroxymonosulfate activation by dual heteroatom-doped wood-derived catalytic membrane 双杂原子掺杂木质催化膜通过流动过硫酸盐活化高效降解四环素

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI: 10.1016/j.jece.2024.114201

Li Zhao , Zifeng Qiu , Hong Ma , Ruiying Zhu , Xiaofang Pan , Xiaochun Wu , Xiaobo Gong

{"title":"Efficient tetracycline degradation via flow-through peroxymonosulfate activation by dual heteroatom-doped wood-derived catalytic membrane","authors":"Li Zhao , Zifeng Qiu , Hong Ma , Ruiying Zhu , Xiaofang Pan , Xiaochun Wu , Xiaobo Gong","doi":"10.1016/j.jece.2024.114201","DOIUrl":"10.1016/j.jece.2024.114201","url":null,"abstract":"<div>The widespread use of antibiotics in the medical industry and in animal husbandry has led to significant environmental pollution. Effective purification of high concentrations of tetracycline (TC) in practical pharmaceutical wastewater remains a substantial challenge. The integration of advanced oxidation with membrane separation technology shows great application potential. In this study, a P and N co-doped balsa wood membrane (PNWM) were fabricated using heteroatomic doped biochar material, aiming to synergize filtration and catalytic oxidation. The catalytic activity of the PNWM/peroxymonosulfate (PMS) system was systematically evaluated. Targeting TC as the pollutant, the PNWM/PMS system achieved a degradation efficiency exceeding 97 % within 30 min and a total organic carbon (TOC) removal efficiency of 63.9 %, surpassing the performance of unmodified wood-based membrane. These excellent results were attributed to the doping of N and P atoms, which increased surface defects and specific area, thereby enhancing the adsorption and degradation of TC by PNWM. The graphite N facilitated electron transfer, while pyridine N served as active sites for PMS activation. Additionally, the low electronegativity of the P formed electronic regions of varying intensities on the PNWM surface, contributing to PMS activation. The membrane process also enhanced mass transfer during the degradation process. Both radical (·OH, SO4·ˉ, O2·ˉ) and non-radical (1O2, electron transfer) pathways cooperated in TC degradation in PNWM/PMS system. Consequently, heteroatom-doped biochar film materials prepared through simple methods provide a promising approach for the effective treatment of refractory organic pollutants in wastewater.</div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114201"},"PeriodicalIF":7.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ultrasound-assisted synthesis of a novel type-II Bi12O15Cl6/CTF-1 heterojunction for visible-light-driven photocatalytic degradation of levofloxacin: Reaction kinetics, degradation pathways, and toxicity assessment 超声辅助合成新型 II 型 Bi12O15Cl6/CTF-1 异质结，用于可见光驱动的左氧氟沙星光催化降解：反应动力学、降解途径和毒性评估

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-19 DOI: 10.1016/j.jece.2024.114192

Adarsh Singh , Amit Bhatnagar , Ashok Kumar Gupta

{"title":"Ultrasound-assisted synthesis of a novel type-II Bi12O15Cl6/CTF-1 heterojunction for visible-light-driven photocatalytic degradation of levofloxacin: Reaction kinetics, degradation pathways, and toxicity assessment","authors":"Adarsh Singh , Amit Bhatnagar , Ashok Kumar Gupta","doi":"10.1016/j.jece.2024.114192","DOIUrl":"10.1016/j.jece.2024.114192","url":null,"abstract":"<div><div>Fluoroquinolones (FQL) are ubiquitous in aquatic environments due to their widespread use, posing a serious environmental threat. In this regard, a novel Bi12O15Cl6/CTF-1 (BTF) photocatalyst was prepared by integrating a covalent triazine framework (CTF-1) with Bi12O15Cl6 by a simple wet-impregnation method for removing levofloxacin (LFX), an FQL-based antibiotic, from an aqueous solution. Under optimal conditions, BTF (III) (comprising 20 % CTF-1) showed the highest photocatalytic activity, achieving approximately 94 % LFX (10 mg/L) degradation in 120 min under visible light with a pseudo-kinetic rate constant of 0.02072 min−1. This can be attributed to the reduced recombination rate and efficient transfer and separation of photoinduced charge carriers. The photocatalyst demonstrated remarkable stability and reusability. The radical trapping experiment revealed <math><msubsup><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow><mrow><mi>•</mi><mo>−</mo></mrow></msubsup></math> and h+ to be the primary active species facilitating the photocatalytic degradation of LFX. Furthermore, the seed germination test affirmed treated effluent to be non-phytotoxic and suitable for irrigation.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114192"},"PeriodicalIF":7.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Preparation of nano-Al2O3 support CaO-based sorbent pellets by novel methods for high-temperature CO2 capture 用新方法制备用于高温捕获二氧化碳的纳米 Al2O3 支持 CaO 基吸附剂颗粒

IF 7.4 2区工程技术

Journal of Environmental Chemical Engineering Pub Date : 2024-09-19 DOI: 10.1016/j.jece.2024.114157

Weilong Chen , Yuting Tang , Hongyu Liu , Jiehong Tang , Jingmin Deng , Ziwei Sun , Xiaoqian Ma

{"title":"Preparation of nano-Al2O3 support CaO-based sorbent pellets by novel methods for high-temperature CO2 capture","authors":"Weilong Chen , Yuting Tang , Hongyu Liu , Jiehong Tang , Jingmin Deng , Ziwei Sun , Xiaoqian Ma","doi":"10.1016/j.jece.2024.114157","DOIUrl":"10.1016/j.jece.2024.114157","url":null,"abstract":"<div>CaO-based sorbents show great promise as materials for CO2 capture. In this paper, three novel preparation methods were proposed to prepare three sorbent pellets based on carbide slag, respectively. The CO2 cyclic capture performance of the sorbent pellets was also investigated. These three novel preparations consist of different binders (agar, gelatine) and different hydrophobic materials (silicone oil, liquid paraffin and silicone mold), respectively. The capture performance of these three sorbent pellets was compared with that of sorbent pellet prepared by existing preparation methods, which used agar as a binder and silicone oil as a hydrophobic material. In addition, the effects of the contents of nano-Al2O3 supports on the sorbent pellets were explored. Among the four preparation methods, the sorbent pellets prepared with agar as binder and silicone mold as hydrophobic material showed exhibiting the highest total capture capacity of 7.70 gCO2/g during 15 cyclic captures. The nano-Al2O3 was used as support to alleviate the sintering of the sorbent pellets prepared with agar as binder and silicone mold as hydrophobic material, preserving most of the CO2 diffusion channels. Among the sorbent pellets with varying contents of nano-Al2O3 support, the pellets with a 10:100 molar ratio of nano-Al2O3 to CaO demonstrated excellent mechanical properties and the highest CO2 cycle capture performance. These pellets exhibited a capture capacity of 0.626 gCO2/g on the first cycle, maintaining a capacity of 0.503 gCO2/g by the 15th cycle. This work introduced a novel method for preparing sorbent pellets of efficient and stable cyclic capture.</div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114157"},"PeriodicalIF":7.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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