不同排矸年限煤矸石废弃地养分含量及重金属污染评价  

Assessment of Nutrient Content and Heavy Metal Pollution in Gangue Waste Lands with Different Dumping Years

作　　者：李文[1] 任晓旭[2] 蔡体久[1] 

机构地区：[1]东北林业大学,哈尔滨150040 [2]中国林业科学研究院森林生态环境与保护研究所,北京100091

出　　处：《林业科学》2011年第6期162-166,共5页Scientia Silvae Sinicae

基　　金：黑龙江省科技攻关项目"矿区废弃地植被恢复与生态重建技术研究"(GA06B302-8)

摘　　要：煤矿区是当今世界陆地生物圈最为典型、退化最为严重的生态系统,矿区废弃地是一种极端裸地,植被稀少,水土流失严重,可造成矿区水体、土壤和大气的严重污染,引发一系列经济、生态、社会等方面的问题（范英宏等,2003）。矿区废弃地占用大量的土地资源以及由此引发的生态破坏、环境污染等问题已成为制约区域经济发展、妨害人类社会生存的根本问题（王笑峰等,2009）。重金属污染已成为全球性的环境问题。Content of nutrients and heavy metals was measured in gangue waste lands with the dumping years from 10 to 50 in Hegang city, Heilongjiang Province, and heavy metal pollution of the study area was analysised using single factor contaminant index and the Nemerow index of pollution. The results showed that the content of nutrients increased in pace with the time of dumping. The average content of hydrolysable nitrogen and total phosphorus in the gangue wastes lands of 10-50 years were 18.0 mg· kg-1 and 0.13 g· kg-1, respectively. Both of them were much less than that of the forest lands in the study area, which were 157.9 mg·kg-1and 0.473 g·kg-1. The content of heavy metal in the gangue waste decreased in pace with the time of dumping. Hg content, ranged from 1.121 mg· kg-1 to 1.896 mg· kg-1, exceeded the national secondary standard content. There was also a certain amount of other heavy metals, but they were all lower than the standard. To assess from the polluted degree of the heavy metals, the pollution of gangue waste lands with different dumping years were in light pollution grade.

关 键 词：矸石废弃地 养分 重金属 污染评价 

分 类 号：S714.2[农业科学—林学]