活性炭复合土工布吸附煤矸石路堤重金属污染物试验研究

Experimental Study on the Adsorption of Heavy Metal Pollutants from Coal Gangue Embankment by Activated Carbon Composite Geotextile

摘要:

为解决煤矸石填料在降雨入渗条件下,其淋出液所含重金属污染物对周边土壤及水资源造成的污染问题,设计了一种活性炭复合土工布材料,可铺设于煤矸石路堤中。开展了活性炭复合土工布对煤矸石填料淋出液中重金属离子的吸附试验,通过改变活性炭复合土工布层数和厚度、活性炭颗粒粒径等,探究不同影响因素条件下活性炭复合土工布对重金属离子的吸附规律及关键影响因素,证明了其用于治理煤矸石路堤对环境污染的可行性。研究结果表明:随着活性炭复合土工布厚度和层数的增加以及活性炭颗粒粒径的减小,试验中重金属离子的吸附率均有不同程度的提升,其中,改变活性炭复合土工布厚度和层数对吸附效果的影响最为显著,而活性炭颗粒粒径的改变对重金属离子的吸附效果影响不明显。

Abstract:

To address the pollution of surrounding soil and water resources caused by heavy metal pollutants in the leachate of coal gangue fill material under rainfall infiltration conditions, a type of activated carbon composite geotextile material was proposed and laid within the coal gangue road embankment. An adsorption experiment on heavy metal ions in the leachate of the coal gangue fill material by the activated carbon composite geotextile was carried out. By changing the number of layers and thickness of the activated carbon composite geotextile and the particle size of the activated carbon particles, the adsorption laws and key influencing factors of heavy metal ions under different conditions were explored, proving the feasibility of using the activated carbon composite geotextile to treat the environmental pollution caused by coal gangue road embankments. The research results show that with the increase of the thickness and number of layers of the activated carbon composite geotextile and the decrease of the particle size of the activated carbon particles, the adsorption rate of heavy metal ions in the experiment is improved to varying degrees. Among these factors, changing the thickness and number of layers of the activated carbon composite geotextile has the most significant impact on the adsorption effect, while the change in the particle size of the activated carbon particles showed a less obvious effect on the adsorption of heavy metal ions.