Comparison of coagulation–Fenton oxidation and coagulation–adsorption processes in textile and chemical industry mixed wastewater

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-12-02 DOI:10.1002/jctb.7789

Aysun Enfiyeci, Deniz İzlen Çifçi

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引用次数: 0

Abstract

BACKGROUND

In this study, the treatment of mixed wastewater from textile and chemical industries using coagulation followed by Fenton oxidation or adsorption processes was investigated. In the coagulation process, the effects of pH and coagulant dosage were examined using polyaluminium chloride, FeCl₃ and alum. The effects of Fe²⁺ and H₂O₂ concentrations, pH and oxidation time on Fenton oxidation of coagulated mixed industrial wastewater were also investigated. In the adsorption process, the effects of pH, adsorbent dosage and adsorption time were evaluated using coconut-based activated carbon (Coconut-AC) and coal-based activated carbon (Coal-AC).

RESULTS

In coagulation, 68.5% chemical oxygen demand (COD), 63.1% total organic carbon (TOC) and 94.3% color removal were achieved with FeCl₃ at pH 5 and a coagulant dose of 600 mg L⁻¹. Coagulation–Fenton oxidation resulted in 95.7% COD, 84.1% TOC and 99.0% color removal with 1500 mg L⁻¹ Fe²⁺ and 6000 mg L⁻¹ H₂O₂ at pH 3. In the coagulation–adsorption process, 97.5% COD, 95.5% TOC and 99.5% color removal were obtained using Coconut-AC with an adsorbent dosage of 40 g L⁻¹ at pH 3, while 92.3% COD, 82.4% TOC and 99.2% color removal were obtained with Coal-AC at pH 3 and an adsorbent dosage of 30 g L⁻¹.

CONCLUSION

Effective treatment of mixed industrial wastewater from the textile and chemical industries can be achieved more quickly using Coconut-AC for adsorption following coagulation. Conversely, the same removal efficiencies can be reached over a longer duration with Fenton oxidation after coagulation. © 2024 Society of Chemical Industry (SCI).

查看原文本刊更多论文

混凝- fenton氧化与混凝-吸附工艺处理纺织化工混合废水的比较

研究了混凝后Fenton氧化法和吸附法处理纺织和化工混合废水的工艺条件。在混凝过程中，用聚合氯化铝、FeCl3和明矾考察了pH和混凝剂用量对混凝过程的影响。考察了Fe2+、H2O2浓度、pH和氧化时间对混凝工业废水Fenton氧化的影响。在吸附过程中，以椰子基活性炭（Coconut-AC）和煤基活性炭（Coal-AC）为研究对象，考察了pH、吸附剂用量和吸附时间对吸附效果的影响。结果在pH为5、混凝剂剂量为600 mg L−1时，FeCl3的化学需氧量（COD）为68.5%，总有机碳（TOC）为63.1%，去色率为94.3%。在pH为3时，Fe2+浓度为1500 mg L−1，H2O2浓度为6000 mg L−1，混凝- fenton氧化法COD去除率为95.7%，TOC去除率为84.1%，色度去除率为99.0%。在混凝-吸附过程中，当吸附剂用量为40 g L−1时，在pH为3时，椰子- ac的COD去除率为97.5%，TOC去除率为95.5%，色度去除率为99.5%；当吸附剂用量为30 g L−1时，煤- ac的COD去除率为92.3%，TOC去除率为82.4%，色度去除率为99.2%。结论椰壳活性炭混凝后吸附处理纺织、化工混合工业废水效果显著。相反，混凝后的Fenton氧化可以在更长的时间内达到相同的去除效率。©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。

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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.