title: Accumulation of Cd in agricultural soil under long-term reclaimed water irrigation.
abstract: Safety of agricultural irrigation with reclaimed water is of great concern as some potential hazardous compounds like heavy metals may be accumulated in soils over time. Impacts of long-term reclaimed water on soil Cd pollution were evaluated based on the field investigation in two main crop areas in Beijing with long irrigation history and on simulation results of STEM-profile model. Under long-term reclaimed water, Cd content in the top 20 cm soil layer was greatly elevated and was more than 2 times higher than that in the deep soil layer. There was very small differences between the field measured and model simulated Cd content in the plow layer (top 20 cm) and entire soil layer. Long-term model prediction showed that reclaimed water irrigation had a low environmental risk of soil Cd pollution, but the risk would be aggravated when there were high metal loading from other sources. The risk is also depending on the soil and plant properties.
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. wpchen@rcees.ac.cn
authors.forename: Weiping
authors.initials: W
authors.lastname: Chen
authors.forename: Sidan
authors.initials: S
authors.lastname: Lu
authors.forename: Chi
authors.initials: C
authors.lastname: Peng
authors.forename: Wentao
authors.initials: W
authors.lastname: Jiao
authors.forename: Meie
authors.initials: M
authors.lastname: Wang
mesh_terms: D057914:Agricultural Irrigation / Q000706:statistics & numerical data*; D002104:Cadmium / Q000032:analysis*; D004784:Environmental Monitoring; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium