Removal of Cd(II) ions from bio-retention system by silane-modified soil

Kinjal J. Shah, Jiacheng Yu, Dongjian Cai, Zhaoyang You

College of Urban Construction, Nanjing Tech University, Nanjing, 211800, China

This study aims to identify the role of wettability on heavy metal immobilization in the bio-retention system. In general, agricultural soil gets wetted easily by water and thereafter evaporates water into the atmosphere due to atmospheric conditions such as sunlight, wind, temperature, and humidity. To lower the water loss, a layer of silane was laid on the soil. This system amazingly decreased the loss of water from the bioretention system. The potential of hydrophobic soil for the removal of Cd(II) ions from the bioretention system was investigated. In addition, the growth of the plant was analyzed. From the study, it is concluded that hydrophobic soil could be useful energy, environmentally friendly, and economically affordable tool for the removal of Cd(II) ions from the bioretention system.