Sewage sludge incineration ash for coimmobilization of lead, zinc and copper: Mechanisms of metal incorporation and competition

Ma, Wei1,2,3; Tang, Yuanyuan1,2; Wu, Pengfei1,2; Xia, Yunxue1,2

2019-11

10.1016/j.wasman.2019.08.029

WASTE MANAGEMENT   影响因子和分区

0956-053X

Heavy metals such as lead, zinc, and copper always coexist in industrial wastes and tend to be released if the wastes are not treated properly. With abundant contents of aluminum, iron and silicon, sewage sludge incineration ash can provide a ceramic matrix for potential heavy metal stabilization. By using ceramic sintering, this study explored the coimmobilization mechanisms of lead, zinc and copper, with detailed explications on phase transformation, metal distribution and the effect of metal content. PbAl2Si2O8 was identified as the major phase for lead immobilization in series with low heavy metal content, while most of the lead was incorporated into Pb-9(PO4)(6) in high metal series. The Zn5Cu1-xFeyAl2-yO4 spinel solid solution was the predominant product phase for copper and zinc stabilization in both reaction series, but zinc was more competitively incorporated into the spinel structure. Moreover, the pattern of heavy metal distribution in the sintered products was largely affected by the metal type and elemental composition of the reaction system. Although different leaching behaviors were observed for the three heavy metals, their leachability was found to reach very low value after the thermal treatment processes. This study proposed a "waste-to-resource" strategy to largely alleviate the environmental burden of solid wastes and heavy metal pollution by using sewage sludge incineration ash as raw materials for low temperature glass-ceramics, with a simultaneous effect on metal immobilization. (C) 2019 Elsevier Ltd. All rights reserved.

Sewage sludge incineration ash Coimmobilization Ceramics Industrial waste Heavy metal

SCI ; EI

英语

第一 ; 通讯

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

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000488656800011

PERGAMON-ELSEVIER SCIENCE LTD

20193507385651

Aluminum compounds ; Ashes ; Copper ; Copper compounds ; Glass ceramics ; Heavy metals ; Industrial wastes ; Iron compounds ; Lead compounds ; Sewage sludge ; Silicon compounds ; Sintering ; Stabilization ; Temperature ; Zinc ; Zinc compounds

Municipal and Industrial Wastes; Waste Treatment and Disposal:452 ; Metallurgy and Metallography:531 ; Copper:544.1 ; Zinc and Alloys:546.3 ; Thermodynamics:641.1

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut, Sch Environm Sci & Engn, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China
2.Engn Southern Univ Sci & Technol, State Environm Protect Key Lab Integrated Surface, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Harbin Inst Technol, Sch Environm, Harbin 150090, Heilongjiang, Peoples R China

Ma, Wei,Tang, Yuanyuan,Wu, Pengfei,et al. Sewage sludge incineration ash for coimmobilization of lead, zinc and copper: Mechanisms of metal incorporation and competition[J]. WASTE MANAGEMENT,2019,99:102-111.

Ma, Wei,Tang, Yuanyuan,Wu, Pengfei,&Xia, Yunxue.(2019).Sewage sludge incineration ash for coimmobilization of lead, zinc and copper: Mechanisms of metal incorporation and competition.WASTE MANAGEMENT,99,102-111.

Ma, Wei,et al."Sewage sludge incineration ash for coimmobilization of lead, zinc and copper: Mechanisms of metal incorporation and competition".WASTE MANAGEMENT 99(2019):102-111.