Speciation and evaluation of Arsenic in surface water and groundwater samples: A multivariate case study

被引:82
作者
Baig, Jameel Ahmed [1 ]
Kazi, Tasneem Gul [1 ]
Shah, Abdul Qadir [1 ]
Kandhro, Ghulam Abbas [1 ]
Afridi, Hassan Imran [1 ]
Arain, Mohammad Balal [2 ]
Jamali, Muhammad Khan
Jalbani, Nusrat [3 ]
机构
[1] Univ Sindh, Ctr Excellence Analyt Chem, Jamshoro 76080, Pakistan
[2] Univ Karachi, NED, Dept Math & Nat Sci, Karachi 32, Pakistan
[3] Pakistan Council Sci & Ind Res, Karachi 75280, Pakistan
关键词
As speciation; Surface water; Groundwater; Cluster analysis; Principal component analysis; SOLID-PHASE MICROEXTRACTION; NATURAL-WATERS; DRINKING-WATER; HEAVY-METALS; RIVER; COPRECIPITATION; SPECTROMETRY; AS(III); HEALTH; PRECONCENTRATION;
D O I
10.1016/j.ecoenv.2010.01.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The principal object of the current study was to estimate total arsenic and its inorganic speciation in different origins of surface water (n=480) and groundwater (n=240) of Sindh, Pakistan. This study provided a description based on the evaluation of physico-chemical parameters of collected water samples and possible distribution of As with respect to its speciation. The concentration of total inorganic As (iAs) and its species (As3+ and As5+) for the surface and underground water was reported in terms of basic statistical parameters, principal component analysis, cluster analysis, metal-to-metal correlations and linear regression analyses. The chemical correlations were observed by PCA, which were used to classify the samples by CA, based on the PCA scores. Standard addition method confirmed the accuracy; the recoveries of As3+ and iAs were found to be >98%. The concentration of As5+ in the water samples was calculated by the difference of the total inorganic arsenic and As3+. The results revealed that the groundwater of the understudied area was more contaminated as compared to the surface water samples. The mean concentration of As3+ and As in the surface water and groundwater samples were in the range 3.0 to 18.3 and 8.74-352 mu g/L, respectively. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:914 / 923
页数:10
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