贵阳市花溪区煤矿废弃地重金属污染评价  

Evaluation of Coal Mining Wasteland Polluted by Heavy Metal of Huaxi District in Guiyang City

作　　者：李榜江[1,2] 王龙昌[2] 龙明忠[1] 张晓雨[2] 叶小林[1] 

机构地区：[1]贵州民族大学,贵州贵阳550025 [2]西南大学农学与生物科技学院 三峡库区生态环境教育部重点实验室 南方山地农业教育部工程研究中心,重庆400716

出　　处：《贵州农业科学》2014年第4期130-135,共6页Guizhou Agricultural Sciences

基　　金：贵州省科学技术基金资助项目"山区小型煤矿废弃地潜在生态风险及其适宜性评价研究"[黔科合J字LKM(2012)06];贵州省科学技术基金"喀斯特高原峡谷区石漠化综合治理的水土保持效应与土壤侵蚀模型构建"[黔科合J字(2011)2040]

摘　　要：为了探明贵阳市花溪区煤矿废弃地重金属污染状况,对采自金田煤矿废弃地的75个样品进行了测试和分析。结果表明:该区域土壤均呈酸性,pH值最高为6.4,最低值仅为2.8。土壤中N、P、K的含量处于中等水平,但因极端pH值影响,N、P、K有效态的含量低,尤其是有效态P的含量,最低仅为3.26mg/kg。金田煤矿废弃地及周边农田重金属单因子污染指数(Pi)从大到小的顺序为Cd>Pb>Cu>Zn>Cr,均处于中污染和轻污染水平。其中,Cd的单因子污染指数最大,为2.95,接近重污染水平。内梅罗综合污染指数评价结果为煤矿占压地>农田>荒地,分别为2.13、1.83、1.58,处于中污染和轻污染状态。To inquire into the pollution condition of the heavy metals in the coal mining wasteland in Huaxi District of Guiyang City,the authors analyzed 75samples from Jintian coal mining wasteland.The data indicated that the soil of this area was acidic,the highest pH was 6.4,and the lowest was recorded only 2.8.The content of N,P,K in the soil was at the medium level.But its content of bioavailable form was low as they were influenced by extreme pH value,especially the element P,which was merely（3.26 mg/kg.The results of the evaluation based on the single factor pollution index of heavy metal in abandoned areas of Jintian coal mine and adjacent farmlands manifested the following order：Cd〉Pb〉Cu Zn〉Cr.All were at the level of moderate and mild contamination,whereas,the highest single factor index was also Cd,2.95,which was close to the level of heavy contamination.And the result of Nemerow pollution index was coal mine occupied oil〉farmlands〉wasteland.They were 2.13,1.83and 1.58, respectively,which were at the moderate level and with mild contamination.

关 键 词：煤矿废弃地 土壤 重金属 阿哈湖 生态风险评价 

分 类 号：X53[环境科学与工程—环境工程]