不同方法评价喀斯特煤矿区农田土壤重金属生态风险比较

刘品祯; 贾亚琪; 程志飞; 杨珍; 杜启露; 吴迪

doi:10.11932/karst20180307

不同方法评价喀斯特煤矿区农田土壤重金属生态风险比较

doi: 10.11932/karst20180307

1.
贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室/黔南民族师范学院化学化工学院
2.
贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室

基金项目: 贵州省“125计划”重大科技专项，项目名称：黔产红托竹荪生态适应性及优质高产大棚立体栽培技术研究，项目合同编号：黔教合重大专项字2015[043]；贵州省科技计划项目，基于碳酸钙剂量对黔产红托竹荪富集重金属及产质的机制，合同编号：黔科合LH[2016]7204号

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出版历程
- 发布日期: 2018-06-25

Ecological risk assessment of heavy metals in farmland soils around karst coal mining areas: A comparison of various methods

1.
Guizhou Provincial Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University/School of Chemistry and Chemical Engineering,Qiannan Normal University for Nationalities
2.
Guizhou Provincial Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University

摘要

摘要: 采用TCLP法、内梅罗综合污染指数、嵌入Igeo综合污染指数法等方法对贵州织金县某煤矿区周边农田土壤重金属进行评价。土壤中Cd、Cr、Cu、Ni、Hg和Zn的含量范围分别为0.79～2.08 mg·kg-1、144.20～464.40 mg·kg-1、91.63～187.50 mg·kg-1、48.13～104.47 mg·kg-1、0.14～2.33 mg·kg-1、144.35～265.89 mg·kg-1，所有土壤样点的Cd、Cr、Cu和Ni含量均已超过国家土壤环境质量二级标准，部分土壤样点的Hg和Zn含量超过二级标准。TCLP法评价结果所有土壤样点均未受到重金属污染；内梅罗综合污染指数法评价结果为农田土壤重金属生态风险处于安全水平；嵌入Igeo综合污染指数法评价结果表明，90%的土壤达到中度污染以上，其中65%的土壤处于中度污染，25%的土壤受到中度至重度污染；潜在生态危害指数法评价表明，所有土壤样点重金属均处于轻微生态风险水平。针对不同评价方法得出的结果存在差异的情况，在评价土壤重金属污染状况时，应根据评价目标的差异选择合适的评价方法。
- 煤矿 /
- 土壤重金属 /
- TCLP法 /
- 内梅罗综合污染指数 /
- 嵌入Igeo综合污染指数法 /
- 生态风险
Abstract: In this paper, we use TCLP method and the methods of Nemerow comprehensive index and geoaccumulation index (Igeo) to evaluate heavy metal pollution in the farmland soils around mining areas in Zhijin County of Guizhou province. The results show that the contents of cobalt (Cd), chromium (Cr), copper (Cu), Nickle (Ni), mercury (Hg) and arsenic (As) in the soil are in the range of 0.79～2.08 mg·kg-1, 144.20～464.40 mg·kg-1,91.63～187.50 mg·kg-1, 48.13～104.47 mg·kg-1, 0.14～2.33 mg·kg-1, and 144.35～265.89 mg·kg-1, respectively. And all the total contents of Cd, Cr, Cu, and Ni in the soil is higher than those of the second -class standard of the national codes on soil environmental quality, while parts of the Hg and zinc contents exceed this standard. The TCLP-Nemerow composite index shows that all sampling points are at safe levels and not polluted by heavy metals. The assessment using Igeo method indicates that 65% of the sample points are at a moderate pollution level, 25% of those are at moderate to severe pollution levels.The potential ecological risk index shows that all the sampling points are at a slight ecological risk level. It can be seen that the analytical results by different evaluation methods differ from each other. Practically, it its hence recommended to choose an appropriate evaluation method based on the pollution degree of the soils.
- mining area /
- heavy metals /
- soil /
- TCLP method /
- Nemerow comprehensive index /
- geoaccumulative index

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参考文献(28)

[1]	李阳兵, 王世杰, 王济.岩溶生态系统的土壤特征及其今后研究方向［J］. 中国岩溶, 2006, 25(4): 285-289.
[2]	覃朝科, 易鹞, 刘静静,等.广西某铅锌矿区废水汇集洼地土壤重金属污染调查与评价［J］. 中国岩溶, 2013, 32(3): 318-323.
[3]	陈怀满, 郑春荣, 涂从,等.中国土壤重金属污染现状与防治对策［J］. AMBIO-人类环境杂质, 1999, 28: 130-134.
[4]	Olawoyin R, Oyewole S A, Grayson R L. Potential risk effect from elevated levels of soil heavy metals on human health in the Niger delta［J］. Ecotoxicology and Environmental Safety, 2012, 85: 120-130.
[5]	Bailey S E, Olin T J, Bricka R M, et al. A review of potentially low-cost sorbents for heavy metals［J］. Water Research, 1999, 33(11): 2469-2479.
[6]	黄益宗, 郝晓伟, 雷鸣,等.重金属污染土壤修复技术及其修复实践［J］. 农业环境科学科学学报, 2013, 32(3): 409-417.
[7]	唐修义, 黄文辉. 煤中微量元素及其研究意义［J］. 中国煤田地质, 2002, 14(增刊): 1-4.
[8]	钟来元, 郭良珍. 不同利用方式农用地土壤重金属污染状况及动态变化特征：以广东省徐闻县为例［J］. 生态环境学报, 2011, 20(12): 1934-1939.
[9]	张国印, 王丽英, 孙世友,等.土壤的重金属污染及防治［J］. 河北农业科学, 2003, 7(S): 5962.
[10]	刘晶, 滕彦国, 崔艳芳,等.土壤重金属污染生态风险评价方法综述［J］. 环境检测管理与技术, 2007, 19:6-11.
[11]	师荣光, 高怀友,赵玉杰,等.基于GIS 的混合加权模式在天津城郊土壤重金属污染评价中的应用. 农业环境科学学报, 2006, 25(增刊): 17-20.
[12]	孟昭虹, 高玉娟.黑龙江生态省土壤重金属分布特征及其生态风险评价.安徽农业科学, 2008, 36 (31):13819-13821,13830.
[13]	黄忠举. 依托资源调整结构织金煤炭成为该县支柱产业［J］. 贵州财政会计, 2000(4):16-16.
[14]	织金县煤炭管理局.织金煤炭产业展翅腾飞［J］. 当代贵州, 2005(11): 62-62.
[15]	许彦, 罗丰, 许如意,等.三亚地区农业土壤pH值测定方法初探［J］. 长江蔬菜. 2011(24):50-51.
[16]	Chang E E, chiallg P C. OmpariS0ns of metal leachability for various wastes by extraction and leaching methods［J］. Chemosphere,2001,45:91-99.
[17]	Guy Mercier, Josee Duchesne. A simple and fast screening test to detect soils polluted by lead［J］. Environmental Pollution,2002,18:285-296.
[18]	Federal Register. Toxicity Characteristic Leaching Procedure ［M］, 1986, 1-35.
[19]	Peters, Robert W. Chelant extraction of heavy metal from contaminated soils［J］. Journal of Hazardous Materials, 1999, 66:151-210.
[20]	朱磊, 贾永刚, 潘玉英. 青岛北站规划区原场地表层土壤重金属污染研究［J］. 环境科学, 2013, 34(9): 3663-3668.
[21]	kanson L. 1980. An ecological risk index for aquatic pollution control: A sedimentological approach. Water Research, 14(8):975-1001.
[22]	徐争启, 倪师军,庹先国,等.潜在生态危害指数法评价中重金属毒性系数计算［J］. 环境科学与技术,2008,31(2):112-115.
[23]	候千, 马建华, 王晓云,等.开封市幼儿园土壤重金属生物活性及潜在生态风险［J］. 环境科学,2011,32(6):1764-1771.
[24]	刘俊华, 王文华, 彭安,等.北京市二个主要工业区汞污染及其来源的初步研究［J］. 环境科学学报, 1998,18(3):331-336.
[25]	关天霞, 何洪波, 张旭东,等.土壤中重金属元素形态分析方法及形态分布的影响因素［J］. 土壤通报, 2011,4(2):503-512.
[26]	王斐, 黄益宗, 王小玲,等.江西钨矿周边土壤重金属生态风险评价评价:不同评价方法的比较［J］. 环境化学,2015, 34(2):225-233.
[27]	Chang E E, Chiang P C. Comparisons of metal leachability for various wastes by extraction and leaching methods［J］. Chemosphere,2001,45:91-99.
[28]	Bilge A, Mehmet A Y. Remediation of lead contaminated soils by stabilization /solidification［J］. Water, Air, and Soil Pollution,2002,133:253-263.