固化底泥的重金属形态分布与生态风险评价  

Speciation Distribution and Ecological Risk Assessment of Heavy Metals in Solidified Sediment

作　　者：黄翌 熊钰 马天跃 张丽 毛瑶 张家泉 HUANG Yi;XIONG Yu;MA Tianyue;ZHANG Li;MAO Yao;ZHANG Jiaquan(School of Environmental Science and Engineering,Hubei Polytechnic University,Huangshi Hubei 435003;Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation,Hubei Polytechnic University,Huangshi Hubei 435003)

机构地区：[1]湖北理工学院环境科学与工程学院,湖北黄石435003 [2]湖北理工学院,矿区环境污染控制与修复湖北省重点实验室,湖北黄石435003

出　　处：《湖北理工学院学报》2023年第6期18-21,共4页Journal of Hubei Polytechnic University

基　　金：国家级大学生创新训练项目(项目编号:202310920001);湖北省大学生创新训练计划项目(项目编号:S202210920013);中央引导地方科技发展资金项目(项目编号:2022BGE252);湖北省水利重点科研课题(项目编号:HBSLKY201407)。

摘　　要：以大冶湖底泥为研究对象,分析了重金属含量及其不同形态分布特征,利用水泥、粉煤灰、矿渣作为固化剂对底泥进行固化,探讨了固化作用对底泥中重金属形态和生态风险的影响。结果表明:固化底泥中重金属有效态占比降低(除Cr外),Cd、Pb、Cu、Zn和Ni分别降低了34.36%、12.07%、9.51%、7.34%和5.48%。固化底泥中重金属生态风险降低,Cu和Pb的生态风险等级由中风险变为低风险,Cd的生态风险等级由高风险降为中风险,可达到资源化利用要求。Content and the species distribution of heavy metals in the sediment of Daye Lake was analyzed.Cement,fly ash and slag were used as curing agents to solidify the sediment.The effect of curing on the speciation distribution and ecological risk of heavy metals in the sediment was discussed.The results showed that the available form of heavy metals in cured sediment decreased significantly(except Cr).Cd,Pb,Cu,Zn and Ni decreased by 34.36%,12.07%,9.51%,7.34% and 5.48%,respectively.After curing,the ecological risk of heavy metals in the sediment decreased.The ecological risk levels of Cu and Pb decreased from medium to low,and Cd decreased from high to medium.In general,the sediment can meet the requirement of resource utilization after curing.

关 键 词：底泥资源化利用 固化 重金属 无侧限抗压强度 

分 类 号：X502[环境科学与工程—环境工程]