镀硬铬废水中铬的还原研究进展

IF 0.4 Q4 ENVIRONMENTAL SCIENCES

Asian Journal of Water, Environment and Pollution Pub Date : 2023-01-23 DOI:10.3233/ajw230008

R. Basavaraja, O. Rahul, M. Ranganatha, K. Suhas, K. Vishnumurthy

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引用次数: 0

摘要

硬铬废水被认为是高毒性的，因为存在六价形式的铬离子，而这种六价状态的铬对动物和人类的毒性更大，因为它能够在细胞中产生活性氧。这些重金属被认为对生物体具有致癌性，因此在将废水排入环境之前，必须将离子还原为三价铬或去除离子。许多还原、中和和去除六价铬的方法已经得到了广泛的研究和综述。综述了国内外在硬铬电镀废水中除铬的研究进展。对脱铬还原工艺的去除率、效率和最佳操作条件进行了研究。

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Reduction of Chromium in Waste Water From Hard Chrome Plating Processes: A Review

Waste water from hard chrome is considered to be highly toxic due to the presence of chromium ions in hexavalent form and this hexavalent state of chromium is more toxic to animals and humans due to its ability to produce reactive oxygen species in cells. Such heavy metals are considered as carcinogenic to living organisms and hence either reduction of ions to trivalent chromium or removal of ions has to be done before ejecting the waste water into the environment. Many processes for reduction, neutralisation and removal of hexavalent chromium have been investigated and reviewed extensively. In the present review, studies and research carried out for the removal of chromium from waste water of hard chrome plating effluent are summarised. The study was carried out on the aspects such as percentage removal, efficiency and optimum operating conditions in chrome removal and reduction processes.

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来源期刊

Asian Journal of Water, Environment and Pollution ENVIRONMENTAL SCIENCES-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Asia, as a whole region, faces severe stress on water availability, primarily due to high population density. Many regions of the continent face severe problems of water pollution on local as well as regional scale and these have to be tackled with a pan-Asian approach. However, the available literature on the subject is generally based on research done in Europe and North America. Therefore, there is an urgent and strong need for an Asian journal with its focus on the region and wherein the region specific problems are addressed in an intelligent manner. In Asia, besides water, there are several other issues related to environment, such as; global warming and its impact; intense land/use and shifting pattern of agriculture; issues related to fertilizer applications and pesticide residues in soil and water; and solid and liquid waste management particularly in industrial and urban areas. Asia is also a region with intense mining activities whereby serious environmental problems related to land/use, loss of top soil, water pollution and acid mine drainage are faced by various communities. Essentially, Asians are confronted with environmental problems on many fronts. Many pressing issues in the region interlink various aspects of environmental problems faced by population in this densely habited region in the world. Pollution is one such serious issue for many countries since there are many transnational water bodies that spread the pollutants across the entire region. Water, environment and pollution together constitute a three axial problem that all concerned people in the region would like to focus on.