粤北大宝山矿区尾矿场周围土壤重金属含量对土壤酶活性影响  

Soil enzymatic activities in heavy metals contaminated soils around Dabaoshan mine tailings, northern Guangdong

作　　者：秦建桥[1] 夏北成[1] 周绪[1] 林小方[1] 

机构地区：[1]中山大学环境科学与工程学院,广东广州510275

出　　处：《生态环境》2008年第4期1503-1508,共6页Ecology and Environmnet

基　　金：广东省自然科学基金团队项目(06202438);中山大学985工程环境污染控制与修复技术创新平台项目

摘　　要：粤北大宝山铁多金属矿床的开发给环境带来了严重的危害。采选冶产生的废液及固体废弃物堆积的淋滤酸水,携带浸滤出的大量重金属离子随着酸水排入下游河道,严重影响矿区及酸水流域的生态环境。对该铅锌尾矿污染区土壤酶活性进行了测定。结果表明,污染区土壤酶活性随着重金属污染程度的加剧而显著降低,其中脱氢酶和脲酶活性下降最明显。多元回归模型显著性检验表明,蔗糖酶活性与矿区土壤重金属复合元素含量之间呈极显著相关,而单一脱氢酶、蛋白酶以及酸性磷酸酶活性与重金属复合元素含量呈显著相关。研究表现出矿区土壤重金属复合污染对土壤酶活性的抑制效应。Mining activities have caused severe soil environment changes in Dabaoshan Mine, Guangdong, Southern China.The acid mine drainage and heavy metal ions drained directly into the Hengshihe river, which contaminated severely the ecological environment along the river. Soil enzymatic activities were determined in areas polluted by tailings.The results showed the soil enzymatic activities decreased significantly with increase of contamination of heavy metals, especially dehydrogenase and urease activities. The result of multivariate regression model test indicated that single dehydrogenase activity was very significantly correlated with combined element content of soil heavy metals in mine area. Moreover, single urease, protease and acid phosphatase activities were significantly related to the combined content of heavy metals. Thus, it is feasible to use soil total enzymatic activity of the soil information system constructed with enzymatic activity to indicate the pollution situation by heavy metals in the soil of mine area.

关 键 词：铅锌尾矿 重金属污染 土壤酶活性 

分 类 号：Q948[生物学—植物学] X17[环境科学与工程—环境科学]