Enhanced diclofenac adsorption and degradation using iron-loaded modified spent bleaching earth carbon in the presence of clofibric acid: mechanistic insights and toxicity assessment

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-08-07 DOI:10.1002/jctb.7723

Liwen Zhang, Xue Song, Jie Zhang, Yue Chen, Yongde Liu, Jihong Zhao, Fanbao Deng, Guihua Yan

{"title":"Enhanced diclofenac adsorption and degradation using iron-loaded modified spent bleaching earth carbon in the presence of clofibric acid: mechanistic insights and toxicity assessment","authors":"Liwen Zhang, Xue Song, Jie Zhang, Yue Chen, Yongde Liu, Jihong Zhao, Fanbao Deng, Guihua Yan","doi":"10.1002/jctb.7723","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> BACKGROUND</h3>\n \n <p>The presence of pharmaceutical active substances such as diclofenac (DCF) and clofibric acid (CA) in aquatic environments poses significant ecological threats. Existing treatments have not fully explored the impact of CA on DCF removal efficiency. This research introduces nZVI/CTAB-SBE@C, a novel adsorbent developed from industrial spent bleaching earth (SBE), modified with cetyltrimethylammonium bromide (CTAB) and nano zero-valent iron (nZVI), enhancing both adsorption and degradation of DCF and CA.</p>\n </section>\n \n <section>\n \n <h3> RESULTS</h3>\n \n <p>This study investigated the impact of CA on the removal capabilities of nZVI/CTAB-SBE@C for DCF in a coexisting system. Systematic examinations were conducted on the effects of various parameters, including reaction time, dosage, temperature, actual wastewater, humic acid content and coexisting ions. Results indicated that the presence of CA significantly enhanced the DCF removal efficiency, achieving an optimal rate of 87.3% under conditions of reaction time 2 h, adsorbent dosage 5 g L<sup>−1</sup> and temperature 25 °C. Moreover, interactions between Al<sup>3+</sup> ions and the adsorbent matrix notably improved removal efficiencies for both DCF and CA. Analysis revealed that CA facilitated new degradation pathways for DCF, including hydroxylation and decarboxylation reactions. Additionally, the presence of CA reduced the toxicity of degradation intermediates, enhancing environmental safety compared to systems containing only DCF.</p>\n </section>\n \n <section>\n \n <h3> CONCLUSION</h3>\n \n <p>This study effectively transforms industrial waste into the efficient nZVI/CTAB-SBE@C adsorbent. The presence of CA not only boosts DCF removal efficiency but also promotes its safer degradation, thereby reducing the ecological impact of contaminants. © 2024 Society of Chemical Industry (SCI).</p>\n </section>\n </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of chemical technology and biotechnology","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/jctb.7723","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

BACKGROUND

The presence of pharmaceutical active substances such as diclofenac (DCF) and clofibric acid (CA) in aquatic environments poses significant ecological threats. Existing treatments have not fully explored the impact of CA on DCF removal efficiency. This research introduces nZVI/CTAB-SBE@C, a novel adsorbent developed from industrial spent bleaching earth (SBE), modified with cetyltrimethylammonium bromide (CTAB) and nano zero-valent iron (nZVI), enhancing both adsorption and degradation of DCF and CA.

RESULTS

This study investigated the impact of CA on the removal capabilities of nZVI/CTAB-SBE@C for DCF in a coexisting system. Systematic examinations were conducted on the effects of various parameters, including reaction time, dosage, temperature, actual wastewater, humic acid content and coexisting ions. Results indicated that the presence of CA significantly enhanced the DCF removal efficiency, achieving an optimal rate of 87.3% under conditions of reaction time 2 h, adsorbent dosage 5 g L⁻¹ and temperature 25 °C. Moreover, interactions between Al³⁺ ions and the adsorbent matrix notably improved removal efficiencies for both DCF and CA. Analysis revealed that CA facilitated new degradation pathways for DCF, including hydroxylation and decarboxylation reactions. Additionally, the presence of CA reduced the toxicity of degradation intermediates, enhancing environmental safety compared to systems containing only DCF.

CONCLUSION

This study effectively transforms industrial waste into the efficient nZVI/CTAB-SBE@C adsorbent. The presence of CA not only boosts DCF removal efficiency but also promotes its safer degradation, thereby reducing the ecological impact of contaminants. © 2024 Society of Chemical Industry (SCI).

查看原文本刊更多论文

在氯仿酸存在下使用铁负载改性漂白土碳增强双氯芬酸的吸附和降解：机理认识和毒性评估

背景水生环境中存在双氯芬酸（DCF）和氯非布酸（CA）等药物活性物质，对生态环境构成了严重威胁。现有的处理方法尚未充分探讨 CA 对 DCF 去除效率的影响。本研究介绍了一种新型吸附剂 nZVI/CTAB-SBE@C，该吸附剂由工业废漂白土 (SBE) 制成，经十六烷基三甲基溴化铵 (CTAB) 和纳米零价铁 (nZVI) 改性，可增强对 DCF 和 CA 的吸附和降解能力。系统考察了各种参数的影响，包括反应时间、剂量、温度、实际废水、腐植酸含量和共存离子。结果表明，在反应时间为 2 h、吸附剂用量为 5 g L-1 和温度为 25 °C 的条件下，CA 的存在能显著提高 DCF 的去除率，最佳去除率为 87.3%。此外，Al3+ 离子与吸附剂基质之间的相互作用显著提高了对 DCF 和 CA 的去除率。分析表明，CA 促进了 DCF 的新降解途径，包括羟化和脱羧反应。此外，与仅含 DCF 的系统相比，CA 的存在降低了降解中间产物的毒性，提高了环境安全性。CA 的存在不仅提高了 DCF 的去除效率，还促进了其更安全的降解，从而降低了污染物对生态环境的影响。© 2024 化学工业学会（SCI）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.