title: In situ stabilization remediation of cadmium contaminated soils of wastewater irrigation region using sepiolite.
abstract: The effects of immobilization remediation of Cd-contaminated soils using sepiolite on soil pH, enzyme activities and microbial communities, TCLP-Cd (toxicity characteristic leaching procedure-Cd) concentration, and spinach (Spinacia oleracea) growth and Cd uptake and accumulation were investigated. Results showed that the addition of sepiolite could increase soil pH, while the TCLP-Cd concentration in soil was decreased with increasing sepiolite. The changes of soil enzyme activities and bacteria number indicated that a certain metabolic recovery occurred after the sepiolite treatments, and spinach shoot biomass increased by 58.5%-65.5% in comparison with the control group when the concentration of sepiolite was < or = 10 g/kg. However, the Cd concentrations in the shoots and roots of spinach decreased with an increase in the rate of sepiolite, experiencing 38.4%-59.1% and 12.6%-43.6% reduction, respectively, in contrast to the control. The results indicated that sepiolite has the potential for success on a field scale in reducing Cd entry into the food chain.
authors.affiliation: Key Laboratory of Original Environmental Quality Safety, Ministry of Agriculture, Tianjin 300191, China. sunyuebing2008@yahoo.com.cn
authors.forename: Yuebing
authors.initials: Y
authors.lastname: Sun
authors.forename: Guohong
authors.initials: G
authors.lastname: Sun
authors.forename: Yingming
authors.initials: Y
authors.lastname: Xu
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.forename: Dasong
authors.initials: D
authors.lastname: Lin
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Liang
authors.forename: Xin
authors.initials: X
authors.lastname: Shi
mesh_terms: D057914:Agricultural Irrigation; D002104:Cadmium / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D017633:Magnesium Silicates / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D018724:Spinacia oleracea / Q000254:growth & development; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D017633:Magnesium Silicates; D012989:Soil Pollutants; D002104:Cadmium; C001671:magnesium trisilicate