Fenton反应法去除酸性废水中的砷和金属离子

IF 0.9 4区材料科学 Q3 Materials Science

Journal of The South African Institute of Mining and Metallurgy Pub Date : 2023-10-18 DOI:10.17159/2411-9717/1863/2023

Y. Wang

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引用次数: 0

摘要

湿法冶金含砷酸性废水中含有大量有害金属离子，排放前必须进行适当处理。在本研究中，砷、铜、锌、铝和镁通过芬顿反应共沉淀。考察了在不同条件下得到的析出物的稳定性。结果表明，pH值和过氧化氢(H2O2)用量对各元素的去除率有显著影响。砷、铜、锌和铝(但不包括镁)可以在pH 5-6和h2o2 /As的摩尔比为2的环境温度下去除。析出物主要为非晶态和粒状，粒度在微米量级。毒性特征浸出试验中，渗滤液中砷的浓度为3.6 mg/L，证明沉淀对砷有固定作用。

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Removal of arsenic and metal ions from acidic effluents via the Fenton reaction method

Arsenic-bearing acidic effluent from hydrometallurgical processes contains many harmful metal ions and must be appropriately treated before discharge. In the present study, arsenic, copper, zinc, aluminum, and magnesium were co-precipitated by means of the Fenton reaction. The precipitates obtained under different conditions were investigated to determine their stability. The results indicate that pH value and hydrogen peroxide (H2O2) dosage have significant effects on the removal of various elements. Arsenic, copper, zinc, and aluminum (but not magnesium) can be removed at pH 5-6 and anH2O2/As mole ratio of 2 at ambient temperature. The precipitates were mainly amorphous and granular with particle size in the micrometre range. The arsenic concentration in leachate from the toxicity characteristic leaching test was 3.6 mg/L, which proves that the precipitates are effective in fixing arsenic.

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来源期刊

Journal of The South African Institute of Mining and Metallurgy 工程技术-矿业与矿物加工

CiteScore

1.50

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： The Journal serves as a medium for the publication of high quality scientific papers. This requires that the papers that are submitted for publication are properly and fairly refereed and edited. This process will maintain the high quality of the presentation of the paper and ensure that the technical content is in line with the accepted norms of scientific integrity.