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

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.