煤矸石模拟浸泡和淋溶实验污染物释放特点的研究

Contamination Releasing Regularity of Coal Gangue Based on Soaking and Leaching Experiments

通过浸泡实验和淋溶实验研究贵州百里杜鹃风景区煤矸石堆场的煤矸石溶解释放污染物的规律。结果表明,煤矸石模拟淋溶渗透水与煤矸石浸泡液中释放的主要污染物一致,主要污染物为硫酸盐(SO42-)、总铁(Fe)和锰(Mn)且pH值低。模拟淋溶实验的淋滤初期,淋滤液中主要污染组分浓度较高,以后随着降水量的增加,从煤矸石中溶出的有害污染物质的量减小,在淋溶初期污染物质溶出的浓度最高。煤矸石的浸泡实验中,浸泡液中主要污染组分浓度较高,随着时间的增加,煤矸石中的污染物不断地释放出来。

Coal gangue of Hundred-mile Azalea Area of Guizhou province were collected and carried out soaking and leaching experiments of Contamination releasing regularity of coal gangue. The result shows that releasing contamination of coal gangue, such as Mn, Fe, SO42- are the main pollutants and the pH is low which were in accordance with contamination release of coal gangue based on soaking and leaching experiments. Coal gangue released the pollutants at the beginning of sprinkling, then decreased with the increase of precipitation. The coiatents of pollutants reached the concentration peak at early stage of showing. The contamination release of coal gangue is high in soaking water and dissolution rate of the contamination is high. The contamination concentration of Coal gangue increased gradually with the extension of time.