title: Use of flue gas desulfurization gypsum for leaching Cd and Pb in reclaimed tidal flat soil.
abstract: A soil column leaching experiment was conducted to eliminate heavy metals from reclaimed tidal flat soil. Flue gas desulfurization (FGD) gypsum was used for leaching. The highest removal rates of Cd and Pb in the upper soil layers (0-30 cm) were 52.7 and 30.5 %, respectively. Most of the exchangeable and carbonate-bound Cd and Pb were removed. The optimum FGD gypsum application rate was 7.05 kg·m(-2), and the optimum leaching water amount for the application was 217.74 L·m(-2). The application of FGD gypsum (two times) and the extension of the leaching interval time to 20 days increased the heavy metal removal rate in the upper soil layers. The heavy metals desorbed from the upper soil layers were re-adsorbed and fixed in the 30-70 cm soil layers.
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Li
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Ze-Jun
authors.initials: ZJ
authors.lastname: Tong
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China. liqusheng@21cn.com.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China. liqusheng@21cn.com.
authors.forename: Qu-Sheng
authors.initials: QS
authors.lastname: Li
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Bao-Yan
authors.initials: BY
authors.lastname: He
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Wang
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Shi-Hong
authors.initials: SH
authors.lastname: Guo
authors.affiliation: Guangzhou Key Laboratory of Environmental Exposure and Health, School of Environment, Jinan University, Guangzhou, 510632, China.|Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou, 510632, China.
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Xu
mesh_terms: D002104:Cadmium / Q000737:chemistry* / Q000302:isolation & purification*; D002133:Calcium Sulfate / Q000737:chemistry*; D007854:Lead / Q000737:chemistry* / Q000302:isolation & purification*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry / Q000302:isolation & purification; D013455:Sulfur / Q000737:chemistry*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead; D013455:Sulfur; D002133:Calcium Sulfate
keywords: Cadmium; Fluidized gas desulfurization gypsum; Leaching; Lead; Reclaimed tidal flat soil; Soil column