摘要
钢渣是钢铁行业制造生产中的副产物,大量未经处理的钢渣废弃堆积,不仅严重浪费资源还占据大量的土地资源,对周边土壤和环境造成污染,甚至对人类生产和生活产生极大威胁。目前我国钢铁行业钢渣产量快速增加,但钢渣综合利用率仅20%左右,而钢渣应用于土壤修复是固体废物处置与生态建设相结合的重要方向之一。在总结钢渣资源物理化学特性的基础上,概括了钢渣应用于土壤修复的基本原理和国内外研究现状。系统分析了钢渣作为土壤改良剂、土壤肥料及土壤重金属钝化剂的主要作用:钢渣作为土壤改良剂不仅可以改良酸化土壤还可以有效减轻温室气体的排放;作为土壤肥料可以为土壤提供微量元素和养分;作为土壤重金属钝化剂可以降低土壤中重金属含量。指出钢渣应用于土壤修复的潜力,同时也探讨了钢渣应用于农业土壤中所产生的环境影响并进行了风险评估,对钢渣应用于土壤修复未来的研究方向进行了展望。
Steel slag is a by-product of the steel industry.A large amount of untreated steel slag waste is piled up,which not only seriously wastes resources but also occupies a large amount of land resources,thus causing pollution to the surrounding soil and environment,and even posing a major threat to human production and life.At present,the production of steel slag in China is increasing rapidly,but the comprehensive utilization rate of steel slag is only about 20%.Using steel slag for soil remediation is one of the important directions for combining solid waste disposal with ecological construction.Based on summarizing the physical and chemical properties of steel slag resources,the basic principles and status quo of using steel slag for soil remediation at home and abroad were summarized.The main functions of steel slag as a soil conditioner,soil fertilizer,and soil heavy metal passivator were systematically analyzed.Steel slag,as a soil conditioner,could not only improve acid soil but also effectively reduce greenhouse gas emissions.As a soil fertilizer,it could provide trace elements and nutrients for the soil,and as a soil heavy metal passivator,it could reduce the heavy metal content in soil.The potential of steel slag for soil remediation was pointed out,and the environmental impacts produced by steel slag used in agricultural soil were explored and the risk assessment was conducted.Finally,the future research direction for the application of steel slag in soil remediation was discussed.
作者
王安
吴美玲
李忠元
周玉强
黄占斌
WANG An;WU Meiling;LI Zhongyuan;ZHOU Yuqiang;HUANG Zhanbin(School of Chemical and Environmental Engineering,China University of Mining and Technology-Beijing;CSCEC 8TH Division Environmental Technology Co.,Ltd.)
出处
《环境工程技术学报》
CAS
CSCD
北大核心
2023年第4期1535-1543,共9页
Journal of Environmental Engineering Technology
基金
中建八局环保科技有限公司资助项目(CCEED-2022-4-07)。
关键词
钢渣
改良剂
肥料
土壤修复
吸附
污染
steel slag
improver
fertilizer
soil remediation
adsorption
pollution
