A REVIEW OF SOLIDIFICATION/STABILIZATION OF HEAVY METAL CONTAMINATED SOIL

Journal of Engineering and Sustainable Development Pub Date : 2023-03-01 DOI:10.31272/jeasd.27.2.7

Safaa Nader Jihad, Khitam Abdul Hussein Saeed

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Abstract

Heavy metal contamination has occurred as a result of industrial civilization. Zinc, copper, chromium, and lead are the most prevalent heavy metal pollutants. Heavy metal contamination has arisen as a significant environmental issue on a global scale. Human and environmental health is at risk when soils are contaminated. as well as have poor engineering qualities. Solidification/Stabilization is a critical remediation strategy for polluted soils which is both efficient and cost-effective. The solidification/stabilization approach has been frequently used to rehabilitate heavy metal-contaminated areas. First, The use of gypsum to strengthen and leach polluted soils was reviewed. Also, cement/fly ash-solidified/stabilized soils have better engineering qualities. On the other hand, the global output of phosphogypsum surpasses 300 million tons, raising disposal and environmental problems every year. The efficiency of the phosphogypsum-based stabilization/solidification technique was investigated, and the methods employed biochar and chemical agents such as citric acid and FeCl3. This review examines various remediation options as well as innovative soil amendments.

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重金属污染土壤的固化稳定研究进展

重金属污染是工业文明的结果。锌、铜、铬和铅是最常见的重金属污染物。重金属污染已成为全球性的重大环境问题。土壤受到污染，人类和环境健康就会受到威胁。而且工程质量也很差。固化/稳定化是一种既有效又经济的修复污染土壤的关键策略。固化/稳定化方法是重金属污染地区修复中常用的方法。首先，综述了石膏在污染土壤加固和浸出中的应用。水泥/粉煤灰固化/稳定土具有较好的工程质量。另一方面，全球磷石膏产量超过3亿吨，每年都带来处置和环境问题。采用生物炭和柠檬酸、FeCl3等化学试剂对磷石膏基固化技术进行了效果研究。本文综述了各种修复方案以及创新的土壤改良剂。

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