title: [Predicting the cadmium bioavailability in the soil of sugarcane field based on the diffusive gradients in thin films with binding phase of sodium polyacrylate].
abstract: The diffusive gradients in thin films (DGT) technique with solid-state binding phases has been widely used for in situ collection and measurement of available heavy metals in waters, soils or sediments, whereas DGT with liquid binding phase is primarily used in the in situ analysis of heavy metals in waters. In this paper, rhizosphere soils of sugarcane were collected in Guangxi and the concentrations of cadmium (Cd) were determined by DGT with a solid-state binding phase of chelex100 (chelex100-DGT) and modified DGT with a liquid binding phase of sodium polyacrylate (CDM-PAAS-DGT). The result showed that the Cd contents in soils measured by DGT with both binding phases and Cd in the roots, leaves and unpolished stems of sugarcane had significant positive correlation. The extraction ability of the CDM-PAAAS-DGT was much higher than that of the chelex100-DGT. In addition, multivariate analyses were used to assess the impact of pH, cation exchange capacity (CEC), soil organic matter (OM) and texture. Two principal components were extracted and the linear regression models were established. The Cd bioavailability in soils could be accurately predicted by the CDM-PAAAS-DGT technique, which expanded its applicable area.
authors.affiliation: Centre for Research in Ecotoxicology and Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China. flwang0603@163.com
authors.forename: Fang-Li
authors.initials: FL
authors.lastname: Wang
authors.forename: Ning-Ning
authors.initials: NN
authors.lastname: Song
authors.forename: Yu-Jie
authors.initials: YJ
authors.lastname: Zhao
authors.forename: Chang-Bo
authors.initials: CB
authors.lastname: Zhang
authors.forename: Yue
authors.initials: Y
authors.lastname: Shen
authors.forename: Zhong-Qi
authors.initials: ZQ
authors.lastname: Liu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001682:Biological Availability; D002104:Cadmium / Q000032:analysis*; D004058:Diffusion; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D016014:Linear Models; D012117:Resins, Synthetic / Q000737:chemistry; D031786:Saccharum / Q000254:growth & development*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D000180:Acrylic Resins; D012117:Resins, Synthetic; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; C024997:Chelex 100; C006903:carbopol 940