title: [Effect of flue gas desulfurization gypsum application on remediation of acidified forest soil].
abstract: Effect of flue gas desulfurization gypsum (FGDG) application on remediation of a typical acidified forest soil was studied through field experiments at Tieshanping, Chongqing in southwest China for one year. To evaluate the effect and risk of FGDG application, pH value, major ions and heavy metal of soil water in different soil layers were observed dynamically, and heavy metal contained in soil and FGDG were measured. Results showed that Ca2+ and SO4(-2) concentration of soil water in FGDG plots increased with time, pH value was elevated slightly, and n(Ca)/n(Al) value of annual average increased from 2.16, 1.35 and 0.88 to 2.58, 1.52 and 1.12 compared with control plots. The concentration of As, Cu, Cr, Ni and Zn in soil water was not elevated significantly. However, slight enrichment of Cr, Ni and Zn in some upper soil layers was observed. Consequently, FGDG application can improve acidified forest soil, without obviously heavy metal increasing in soil water. However, risk for heavy metal enrichment still exists, which is need for further study.
authors.affiliation: State Joint Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. y-luo09@mails.tsinghua.edu.cn
authors.forename: Yao
authors.initials: Y
authors.lastname: Luo
authors.forename: Rong-Hua
authors.initials: RH
authors.lastname: Kang
authors.forename: De-Xiang
authors.initials: DX
authors.lastname: Yu
authors.forename: Bing-Quan
authors.initials: BQ
authors.lastname: Tan
authors.forename: Lei
authors.initials: L
authors.lastname: Duan
mesh_terms: D015258:Acid Rain; D002133:Calcium Sulfate / Q000737:chemistry*; D002681:China; D004784:Environmental Monitoring; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis / Q000302:isolation & purification*; D014197:Trees / Q000254:growth & development*
chemical_list: D015258:Acid Rain; D019216:Metals, Heavy; D012989:Soil Pollutants; D002133:Calcium Sulfate