title: Leaching Behavior of Heavy Metals from Cement Pastes Using a Modified Toxicity Characteristic Leaching Procedure (TCLP).
abstract: As the standard toxicity characteristic leaching procedure (TCLP) can not exhaust the acid neutralizing capacity of the cement rotary kiln co-processing solid wastes products which is particularly important for the assessment of the leaching concentrations of heavy metals. A modified TCLP was proposed. The extent of leaching of heavy metals is low using the TCLP and the leaching performance of the different metals can not be differentiated. Using the modified TCLP, however, Zn leaching was negligible during the first 180 h and then sharply increased (2.86 ± 0.18 to 3.54 ± 0.26 mg/L) as the acidity increased (pH < 6.0). Thus, Zn leaching is enhanced using the modified TCLP. While Pb leached readily during the first 126 h and then leachate concentrations decreased to below the analytical detection limit. To conclude, this modified TCLP is a more suitable method for these cement rotary kiln co-processing products.
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, 198 Jiaogong Road, Hangzhou, 310012, China.
authors.forename: Minrui
authors.initials: M
authors.lastname: Huang
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, 198 Jiaogong Road, Hangzhou, 310012, China.
authors.forename: Huajun
authors.initials: H
authors.lastname: Feng
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, 198 Jiaogong Road, Hangzhou, 310012, China. shends@zju.edu.cn.
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Shen
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, 198 Jiaogong Road, Hangzhou, 310012, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, 198 Jiaogong Road, Hangzhou, 310012, China.
authors.forename: Yingqiang
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, 198 Jiaogong Road, Hangzhou, 310012, China.
authors.forename: Jiali
authors.initials: J
authors.lastname: Shentu
mesh_terms: D003252:Construction Materials / Q000032:analysis* / Q000592:standards; D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis* / Q000633:toxicity*; D012037:Refuse Disposal
chemical_list: D007220:Industrial Waste; D019216:Metals, Heavy
keywords: Clinker; Curing; Heavy metal; Leaching; Lead; Toxicity characteristic leaching procedure (TCLP); Zinc; pH