A comparison study on heavy metal/metalloid stabilization in Maozhou River sediment by five types of amendments

Liu，Yunsong1,2,3; Tang，Yuanyuan1; Zhong，Gansheng1; Zeng，Hui2,3

2019

10.1007/s11368-019-02310-w

JOURNAL OF SOILS AND SEDIMENTS   影响因子和分区

1439-0108

1614-7480

Purpose: River sediment pollution by heavy metals/metalloids has attracted widespread attention due to a serious threat to the ecosystem and human health. As an effective and economical alternative, the stabilization method was considered by previous studies for the remediation of sediments polluted by metals/metalloids. However, a comprehensive study is required for an extensive comparison on the effects of metal/metalloid immobilization based on the application of different materials as sediment amendments. Materials and methods: In this study, the Maozhou River was selected as the study area, and the stabilization method was applied for the remediation of the river sediment polluted by metals and metalloids. Five materials (CaCO, Ca(OH), zeolite, kaolin, FeCl) were selected as amendments for the metal/metalloid stabilization in the collected sediment. A modified BCR procedure was employed for the speciation analysis of heavy metals and metalloid in the sediment before and after remediation. A TCLP (toxicity characteristic leaching procedure) investigation was performed to further evaluate the immobilization of heavy metals in acidic environment. Results and discussion: The sediment of the Maozhou River was heavily polluted by heavy metals and metalloid. The speciation of As, Pb, Cr, and Mn mainly exists as residual fraction (F4), while that of Ni, Cu, and Zn was identified as exchangeable metal and carbonate-associated fraction (F1) and fraction associated with Fe-Mn oxides (F2). Moreover, the F2 fraction of Co was observed as the major speciation. Through the application of five materials (CaCO, Ca(OH), zeolite, kaolin, FeCl) as sediment amendments, the metal/metalloid speciation was transferred into F4. When five amendments were compared, the stabilization effect can be ordered as CaCO > zeolite > FeCl > kaolin > Ca(OH) based on the modified BCR results. TCLP results showed that using Ca(OH) and CaCO as amendments can significantly reduce the metal leachability in an acidic environment, while zeolite is effective for most of the heavy metals and metalloid. Conclusions: The results showed that the sediment of the Maozhou River was seriously polluted by a variety of heavy metals and metalloids. This study provided extensive information on the speciation of metals or metalloid and the effect of various amendments on metals and metalloid stabilization, which can be of vital importance for further remediation of metal/metalloid-polluted sediment.

Amendment Heavy metals Metalloid River sediment Speciation Stabilization

SCI ; CPCI-S

英语

第一 ; 通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Environmental Sciences & Ecology ; Agriculture

Environmental Sciences ; Soil Science

WOS:000505160200005

SPRINGER HEIDELBERG

AGRICULTURAL SCIENCES

2-s2.0-85070558731

Scopus

1.School of Environmental Science and EngineeringGuangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlState Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution ControlSouthern University of Science and Technology,Shenzhen,1088 Xueyuan Blvd, Nanshan District,518055,China
2.College of Urban and Environment SciencesPeking University,Beijing,100871,China
3.School of Urban Planning and DesignPeking University Shenzhen Graduate School,Shenzhen,Nanshan District,518055,China

Liu，Yunsong,Tang，Yuanyuan,Zhong，Gansheng,et al. A comparison study on heavy metal/metalloid stabilization in Maozhou River sediment by five types of amendments[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(12):3922-3933.

Liu，Yunsong,Tang，Yuanyuan,Zhong，Gansheng,&Zeng，Hui.(2019).A comparison study on heavy metal/metalloid stabilization in Maozhou River sediment by five types of amendments.JOURNAL OF SOILS AND SEDIMENTS,19(12),3922-3933.

Liu，Yunsong,et al."A comparison study on heavy metal/metalloid stabilization in Maozhou River sediment by five types of amendments".JOURNAL OF SOILS AND SEDIMENTS 19.12(2019):3922-3933.