文献类型：期刊文献

英文题名：Barium concentration, phytoavailability, and risk assessment in soil-rice systems from an active barium mining region

作者：Lu, Qinhui Xu, Xiaohang Liang, Longchao Xu, Zhidong Shang, Lihai Guo, Jianyang Xiao, Dean Qiu, Guangle

第一作者：Lu, Qinhui

通信作者：Qiu, GL[1];Xiao, DA[2]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China;[4]Guizhou Inst Technol, Coll Resource & Environm Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China;corresponding author), Guizhou Inst Technol, Coll Resource & Environm Engn, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院资源与环境工程学院;贵州理工学院;

年份：2019

卷号：106

起止页码：142-148

外文期刊名：APPLIED GEOCHEMISTRY

收录：;EI(收录号：20192106964024);Scopus(收录号：2-s2.0-85065919350);WOS:【SCI-EXPANDED(收录号:WOS:000470085700014)】；

基金：This study was supported by the Opening Fund of the State Key Laboratory of Environmental Geochemistry (SKLEG2019716). We would like to express our appreciation to Dr. Yong Meng for his help with the X-ray diffraction analysis in soils.

语种：英文

外文关键词：Barium; Phytoavailability; Paddy soils; Rice; Risk assessment

摘要：Barium (Ba) is a non-essential and toxic element. In China, intensive Ba mining and Ba salt manufacturing have led to sharp increases in Ba in the environment, but little information is available regarding Ba concentrations in paddy soil and rice. The total concentrations and phytoavailability of Ba in paddy soils and paired rice samples collected from the world's largest Ba mine in Dahebian, Tianzhu, Guizhou Province, southwestern China, were investigated. Risk assessments of Ba exposure via rice consumption were also evaluated. The results indicated that extremely high Ba concentrations existed in paddy soils, ranging between 518 mg/kg and 65,760 mg/kg, which demonstrated severe Ba contamination, as expected. The concentrations of rice Ba varied from 0.10 to 3.5 mg/kg, and a significantly positive correlation (r = 0.51, p < 0.05) between rice Ba and water-extractable Ba was observed, suggesting that water, rather than weak acid (0.43 M CH3COOH), chelating agents (DTPA) or neutral salts (0.1 M NaNO3, 0.01 M CaCl2 or 1 M NH4OAc), is a suitable extractant for predicting the phyto-available Ba in the studied soils. Risk assessments showed that residents experienced low Ba exposure via rice consumption when considered in isolation of other sources in this study area.