城市污泥的直接施用对矿区土壤修复的影响  

EFFECTS OF DIRECT APPLICATION OF SEWAGE SLUDGE ON SOIL REMEDIATION IN ABANDONED MINING AREA

作　　者：潘志强 张淑琴[1,2] 任大军 刘爽[1,2] 张晓晴 PAN Zhi-qiang;ZHANG Shu-qin;REN Da-jun;LIU Shuang;ZHANG Xiao-qing(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei’s Key Laboratory of Highly Efficient Utilization and Agglomeration of Metallurgical Mineral Resources,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081 [2]冶金矿产资源高效利用与造块湖北省重点实验室,武汉430081

出　　处：《环境工程》2019年第11期189-193,183,共6页Environmental Engineering

基　　金：国家自然科学基金(41501537,41571306);冶金矿产资源高效利用与造块湖北省重点实验室开放基金(2017zy003)

摘　　要：为探讨城市污泥直接用于矿区土壤修复的可行性,以矿山废弃土壤为基质,直接施入不同含量的城市污泥进行盆栽试验,研究污泥施入量对矿山土壤理化性质的影响,以及本地植物鸭跖草对施加污泥土壤的毒害性响应及其去除土壤中重金属的效果。结果表明:城市污泥能够有效提高矿区土壤肥力,改善土壤结构,使其达到NY/T 391—2000《绿色食品产地环境技术条件》土壤肥力一级标准,但同时也加了重金属(Cu、Zn、Pb、Cd)污染程度;而种植本土植物鸭跖草对Cu、Zn、Pb、Cd有着一定的去除作用,在短期内去除率为7%~10%。通过控制污泥直接施入量为15%以及长期种植本地植物能够有效实现矿区废弃土壤的修复。In order to understand the feasibility of applying sewage sludge directly to soil remediation in mining areas,a series of potted experiments were designed to determine the influence of spiked sewage sludge with different proportions on physical and chemical properties of abandoned mining soil.The toxicity response and removal effect of Commelina communis as the native plant on soil heavy metals was researched,too.The results showed that mining soil fertility was effectively enhanced even reaching level I of fertility standard and the soil structure was also improved,while the soil heavy metal contents(Cu,Zn,Pb and Cd)were increased.However,the Commelina communis was observed to remove soil heavy metals in certain extent and their removal rate could reach 7%~10%in a short term.Therefore,the combination application of 15%sewage sludge addition and native plants was an promising way for soil remediation in mining area.

关 键 词：城市污泥 废弃矿区土壤 重金属 土壤修复 

分 类 号：X70[环境科学与工程—环境工程]