轻度重金属污染土壤建材资源化及其环境影响  

Building Material Recycling of Light Heavy Metal Contaminated Soil and Its Environmental Impact

作　　者：徐佳丽 黄国蕾 陈云嫩[1] XU Jiali;HUANG Guolei;CHEN Yunnen(Jiangxi Key Laboratory of Mining&Metallurgy Environmental Pollution Control,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学江西省矿冶环境污染控制重点实验室,江西赣州341000

出　　处：《中国资源综合利用》2023年第1期85-88,98,共5页China Resources Comprehensive Utilization

摘　　要：我国的土壤环境状况不容乐观,土壤重金属污染问题尤为严重。基于循环经济理念,本文简述了几种重金属污染土壤的建材资源化途径,如烧结砖、烧结陶粒和轻骨料。为了探讨轻度重金属污染土壤建材资源化及其环境影响,笔者以江西省赣州市某重金属污染土壤为研究对象,研究最佳掺混比例下重金属在烧结过程中的迁移情况。结果显示,以30%轻度重金属污染土壤配70%页岩制作砖坯,生产的烧结砖对砷、铬、铅的固化率分别为22%、100%、61%,排放烟气中重金属污染物满足相关标准。烧结砖满足《烧结多孔砖和多孔砌块》(GB/T 13544-2011)的相关产品要求,其浸出重金属浓度显著低于标准限值。The situation of soil environment in China is not optimistic, and the problem of heavy metal pollution in soil is particularly serious. Based on the concept of circular economy, this paper briefly introduces several ways of building material recycling of heavy metal polluted soil, such as sintered brick, sintered ceramsite and light aggregate. In order to explore the building material recycling of light heavy metal contaminated soil and its environmental impact, the author takes a heavy metal contaminated soil in Ganzhou City, Jiangxi Province as the research object to study the migration of heavy metals in the sintering process under the optimal mixing ratio. The results show that the solidified rates of arsenic,chromium and lead in the sintered bricks made of 30% light heavy metal polluted soil and 70% shale are 22%, 100% and 61% respectively, and the heavy metal pollutants in the discharged flue gas meet the relevant standards. The sintered bricks meet the relevant product requirements of the "Fired Porous Bricks and Porous Blocks"(GB/T 13544-2011), and the concentration of leached heavy metals is significantly lower than the standard limit.

关 键 词：轻度重金属污染土壤 建材资源化 烧结砖 迁移与浸出 

分 类 号：X53[环境科学与工程—环境工程]