Assessing the characteristics of groundwater quality of arsenic contaminated aquifers in the blackfoot disease endemic area

Kuang Liang Lu, Chen Wuing Liu, Sheng Wei Wang, Cheng Shin Jang, Kao Hung Lin, Vivian Hsiu Chuan Liao, Chung Min Liao, Fi John Chang

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Redox couples approach and multivariate statistical techniques, including factor analysis, cluster analysis and discriminant analysis, were applied to evaluate and to interpret the complex groundwater quality in the blackfoot disease endemic area, Taiwan. Most groundwater samples were characterized as Na-Ca-HCO3 with HCO3- as the dominant anion. Total arsenic (As) concentration, predominantly as As3+, ranged from <1.0 to 562.7μg/L. The patterns of measured reducing potential were consistent with those values calculated from As couple, revealing the in situ environment enhanced the accumulation of As concentration in the groundwater. Factor analysis proposed a four-factor model, comprising salination, reductive dissolution of Fe/Mn oxyhydroxides, As reduction and chemical potential factor, and explained 89.94% of total variance in groundwater. Furthermore, two factors, reductive dissolution of Fe/Mn oxyhydroxides and As reduction, suggested that the decoupled reductive processes accounted for high As concentration in this area. Cluster analysis was adopted to spatially categorize the sampled wells into three main clusters and characterized by the factor scores of the four-factor model. Two-parameter (pH and Eh) model derived from discriminant analysis can be used for preliminary assessment to determine whether the As concentration exceeds 10μg/L with simple field measurements in this area.

原文English
頁(從 - 到)1458-1466
頁數9
期刊Journal of Hazardous Materials
185
發行號2-3
DOIs
出版狀態Published - 2011 一月 30

All Science Journal Classification (ASJC) codes

  • 環境工程
  • 環境化學
  • 廢物管理和處置
  • 污染
  • 健康、毒理學和誘變

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