title: Distribution and assessment of Pb in the supergene environment of the Huainan Coal Mining Area, Anhui, China.
abstract: Coal mining area is highly subject to lead (Pb) pollution from coal mining activities. Several decades of coal mining and processing practices in dozens of coal mines in the Huainan Coal Mining Area (HCMA) have led to the accumulation of massive amounts of coal gangue, which piled in dumps. In order to investigate the impacts of coal gangue dumps on Pb level in the supergene media of the HCMA, a systematic sampling campaign comprising coal gangue, soil, wheat, and earthworm samples was conducted. The average Pb content in the coal mining area soil is 24 mg/kg, which is slightly higher than the associated coal gangues (23 mg/kg) and markedly higher than reference region soil (12.6 mg/kg). Soil in the HCMA present a slight to moderate Pb contamination, which might be related to the weathering and leaching of coal gangue dumps. Lateral distribution of Pb in HCMA soil differed among individual coal mines. The soil profile distribution of Pb depends on both natural and anthropogenic contributions. Average Pb content is higher in roots than in stems, leaves, and wheat husks, while the Pb level in seeds exceeded the maximum Pb allowance for foods (Maximum Levels of Contaminants in Foods of China, GB 2762-2012). Earthworms in the selected area are significantly enriched in Pb, suggesting higher bio-available Pb level in soil in the HCMA.
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Fang
authors.forename: Guijian
authors.initials: G
authors.lastname: Liu
authors.forename: Chuncai
authors.initials: C
authors.lastname: Zhou
authors.forename: Zijiao
authors.initials: Z
authors.lastname: Yuan
authors.forename: Paul Kwan Sing
authors.initials: PK
authors.lastname: Lam
mesh_terms: D002681:China; D003032:Coal Mining; D004784:Environmental Monitoring; D004787:Environmental Pollution / Q000706:statistics & numerical data; D007220:Industrial Waste / Q000032:analysis / Q000706:statistics & numerical data; D007854:Lead / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D012987:Soil; D012989:Soil Pollutants; D007854:Lead
references.citation: Environ Pollut. 2013 Jul;178:322-8
references.pmid: 23603469
references.citation: Sci Total Environ. 2010 Oct 15;408(22):5325-30
references.pmid: 20801490
references.citation: JAMA. 1996 Feb 7;275(5):363-9
references.pmid: 8569015
references.citation: N Engl J Med. 2003 Apr 17;348(16):1517-26
references.pmid: 12700371
references.citation: Sci Total Environ. 2005 Mar 1;339(1-3):153-66
references.pmid: 15740766
references.citation: Environ Pollut. 2009 Jul;157(7):1981-9
references.pmid: 19321245
references.citation: Environ Health Perspect. 2005 Jul;113(7):894-9
references.pmid: 16002379
references.citation: Environ Health Perspect. 2008 May;116(5):674-9
references.pmid: 18470301
references.citation: Environ Monit Assess. 2011 Jun;177(1-4):63-71
references.pmid: 20661770
references.citation: J Air Waste Manag Assoc. 2011 Aug;61(8):850-7
references.pmid: 21874956
references.citation: Neurotoxicology. 2007 Nov;28(6):1170-7
references.pmid: 17868887
references.citation: Sci Total Environ. 1991 Mar;100 Spec No:151-76
references.pmid: 2063180
references.citation: Environ Pollut. 2002;118(3):419-26
references.pmid: 12009140