硝酸和氯磺酸功能化粉末活性炭同时去除地表水中的农药混合物和天然有机物

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-04-22 DOI:10.1002/jctb.7659

Betul Aykut-Senel, Cihan Ozgur, Sezgin Bakirdere, Sehnaz Sule Kaplan-Bekaroglu, Nuray Ates

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引用次数: 0

摘要

已有多项研究探讨了水和废水中甲草胺、乙草胺、甲草胺和倍硫磷等杀虫剂的吸附问题，但由于这些化合物与天然有机物（NOM）之间存在竞争性吸附效应，使得有效去除这些化合物变得更加复杂。本研究旨在填补这一空白，探索硝酸和氯磺酸改性活性炭在实际环境条件下去除农药和 NOM 的功效。原始吸附剂和氯磺酸改性吸附剂对农药的去除效果相当，而硝酸改性 AC Puriss（AC2）吸附剂的去除效果较差。值得注意的是，100 毫克/升剂量的原始活性炭和改性粉末活性炭（PAC）对水样中所有四种农药的去除率均超过 98%。事实证明，用硝酸和氯磺酸对粉末状活性碳进行改性可显著增强其结构和吸附特性。这些改性提高了农药的去除率，特别是氯磺酸改性的 PAC，在吸附测试中表现出卓越的性能。该研究还强调了水中低分子量有机物的竞争性吸附，它们与农药竞争活性吸附位点。本文受版权保护。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Simultaneous removal of mixed pesticides and natural organic matter from surface waters by nitric and chlorosulfonic acid functionalized powdered activated carbon

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Simultaneous removal of mixed pesticides and natural organic matter from surface waters by nitric and chlorosulfonic acid functionalized powdered activated carbon

BACKGROUND

Several studies have addressed the adsorption of pesticides such as alachlor, acetochlor, metolachlor and fenthion from water and wastewater, yet the interaction of these compounds with natural organic matter (NOM) complicates their effective removal owing to competitive adsorption effects. This study aims to fill this gap by exploring the efficacy of nitric acid and chlorosulfonic acid-modified activated carbons (ACs) in removing both pesticides and NOM under realistic environmental conditions.

RESULTS

Modifications using nitric acid and chlorosulfonic acid significantly improved the pesticide removal capabilities of Norit SX F Cat (AC1) adsorbents. While both the original and chlorosulfonic acid-modified adsorbents showed comparable efficacy in pesticide removal, nitric acid-modified AC Puriss (AC2) adsorbents were less effective. Remarkably, a 100 mg L⁻¹ dose of both original and modified powdered ACs (PACs) removed >98% of all four pesticides from water samples. Additionally, a lower 25 mg L⁻¹ dose effectively achieved similar removal rates, demonstrating their utility as feasible options for water treatment.

CONCLUSION

Modifying PACs with nitric acid and chlorosulfonic acid has been proven to enhance their structural and adsorptive properties significantly. These modifications led to improved pesticide removal efficiencies, particularly with the chlorosulfonic acid-modified PACs, which demonstrated superior performance in adsorption tests. The study also highlighted the competitive adsorption posed by low-molecular-weight organic substances in water, which compete with pesticides for active adsorption sites. © 2024 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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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.