The leaching properties of Pb and Cd contaminated soils solidified/stabilized by ordinary portland cement and waste phosphorus slag
CAO Yang1,2 ， ZHENG Yang2， NING Zhi3
1.Ecological Environment Monitoring Center， Huangshi Ecological Environment Department of Hubei Province， Huangshi， Hubei 435003， China；2. College of Resources and Environment， Huazhong Agricultural University， Wuhan 430070， China；3.Wisdri City Environment Protection Engineering Limited Company，Wuhan 430205， China
Abstract：In order to solve the badly effect in solidified/stabilized Pb and Cd contaminated soils， the ordinary portland cement and waste phosphorus slag were used to solidified/stabilized Pb and Cd contaminated soils. The short-term leaching test(such as acetic acid leaching test and sulfur-nitric acid leaching test) and long-term leaching test(semi-dynamic leaching test) were used to investigate the leaching properties of cement and waste phosphorus slag treated Pb and Cd contaminated soils. The results showed that cement and waste phosphorus slag had an efficient effect on highly concentrated contaminated soils and leaching concentration decreased significantly.Acetic acid and sulfur-nitric acid leaching test results showed that the Pb and Cd contaminated soils treated by cement and waste phosphorus slag had highly eroding resistion. When the cement and waste phosphorus slag ratio was 9.4/0.6， the acetic acid and sulfur-nitric acid leaching concentration of Pb， Cd were below the environmental quality standards for surface water of Ⅴ category. When the cement and waste phosphorus slag ratio was 9/1，the acetic acid and sulfur-nitric acid leaching concentration of Pb， Cd were below the environmental quality standards for surface water of Ⅱ category. The semi-dynamic leaching test results showed that the Pb and Cd contaminated soils treated by cement and waste phosphorus slag had low environmental risk. The Pb and Cd leaching concentration of semi-dynamic leaching test were below the environmental quality standards for surface water of Ⅳ category. The Pb and Cd contaminated soils treated by cement and waste phosphorus slag had Pb and Cd contaminated soils treated by cement and waste phosphorus slag had highly reuse potential.
曹 阳,郑 杨,宁 智. 水泥—磷尾渣复合材料修复铅、镉污染土壤的再溶出特性研究[J]. 华中师范大学学报(自然科学版), 2021, 55(2): 197-203.
CAO Yang,ZHENG Yang,NING Zhi. The leaching properties of Pb and Cd contaminated soils solidified/stabilized by ordinary portland cement and waste phosphorus slag. journal1, 2021, 55(2): 197-203.
2021, Vol. 55 
