title: Heavy metal contamination, sources, and pollution assessment of surface water in the Tianshan Mountains of China.
abstract: In order to gain insight into heavy metal contamination occurring in the surface water of the Tianshan Mountains in northwest China, we collected surface water samples from there, tested heavy metals Pb, Ni, Cd, Co, Hg, As, Cu, Mn, Zn, and Cr, and then we analyzed the data using typical analysis, multivariate statistical, and pollution index methods. Results showed that (1) the order of the average values of the ten kinds of heavy metals in all the water samples was as follows: Zn > Mn > Cu > Co > Ni > Pb > Cr > As > Hg > Cd. The maximum variation coefficients of Zn and Pb were 138.96 and 145.86 %, respectively, indicating that these heavy metal concentrations varied largely between different sampling locations. (2) Research showed the average concentrations of Pb, Cd, As, Cu, Zn, and Cr were all within the national surface water standard of class IV and those of As, Cu, Mn, and Cr were all within the range of the Drinking Water Guidelines from the WHO, indicating the surface water of the Tianshan Mountains is clean. (3) Multivariate statistical analysis showed that Cu, Cd, Mn, Hg, Zn, and Pb have close correlations, and they mainly came from artificial sources; while Ni, As, Co, Cu, and Cr mainly came from natural sources. The results of correlation analysis, principal component analysis, and cluster analysis are consistent. (4) Pollution evaluation showed the values of comprehensive pollution index (WQI) of ten kinds of heavy metals in three sections were all lower than 2, suggesting the low levels of pollution, while the over-limit ratios of Pb and Zn in water samples of the middle Urumqi-Akesu section, As in the western Zhaosu-Tekesi section, and Pb, Hg, and Zn in the eastern Balikun-Yiwu section were all above 10 %. This research shows that recent economic development of the Tianshan Mountains has negatively influenced the heavy metal concentrations in the surface water, although the concentrations of the ten kinds of tested heavy metals are relatively low.
authors: State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China.
authors: Zhang
authors: Z
authors: Zhaoyong
authors: Jilili
authors: J
authors: Abuduwaili
authors: Jiang
authors: J
authors: Fengqing
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis*; D015999:Multivariate Analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
references: J Exp Bot. 2002 May;53(372):1351-65
references: 11997381
references: Huan Jing Ke Xue. 2014 Jun;35(6):2392-400
references: 25158522
references: Environ Monit Assess. 2010 Oct;169(1-4):385-95
references: 19847663
references: J Colloid Interface Sci. 2004 Sep 1;277(1):1-18
references: 15276031
references: Science. 1985 Nov 8;230(4726):674-6
references: 17797291
references: Environ Pollut. 2003;121(1):129-36
references: 12475070
references: Environ Monit Assess. 2012 May;184(5):2763-73
references: 21701891
references: Environ Monit Assess. 2012 Mar;184(3):1371-8
references: 21494825
references: Environ Monit Assess. 2008 Dec;147(1-3):183-90
references: 18085419
references: Environ Monit Assess. 2008 Dec;147(1-3):107-16
references: 18157612
references: Nat Genet. 1993 Jan;3(1):14-9
references: 8490646
references: Water Res. 2003 Nov;37(18):4311-30
references: 14511701
references: Environ Monit Assess. 2014 Jan;186(1):335-48
references: 24046238
references: Ecotoxicol Environ Saf. 2009 May;72(4):1242-8
references: 19070365
references: Gene. 1996 Nov 7;179(1):21-30
references: 8955625
references: Br Med Bull. 2003;68:167-82
references: 14757716
references: Environ Pollut. 2001;114(3):313-24
references: 11584630
references: Ecotoxicol Environ Saf. 2008 Mar;69(3):513-24
references: 17555815
references: Bull Environ Contam Toxicol. 1999 Nov;63(5):673-81
references: 10541689
references: J Colloid Interface Sci. 2004 Dec 15;280(2):309-14
references: 15533402
references: Appl Microbiol Biotechnol. 1999 Jun;51(6):730-50
references: 10422221
references: Sci Total Environ. 2000 Oct 30;262(1-2):175-83
references: 11059852
references: Plant Physiol. 2000 Jul;123(3):825-32
references: 10889232
references: Mar Environ Res. 2003 Jul-Aug;56(1-2):205-23
references: 12648956
references: Guang Pu Xue Yu Guang Pu Fen Xi. 2012 Jan;32(1):25-8
references: 22497119
references: Environ Pollut. 2002;118(3):419-26
references: 12009140