地下水人工回灌过程中胶体与污染物的共迁移研究进展

Advances in the co-migration of colloids and pollutants during groundwater artificial recharge

人工回灌可以有效补给地下水含水层,防治海水入侵,但回灌水注入也会打破原始地下水化学场与动力场的平衡,导致大量胶体脱离固相介质释放到地下水中。胶体具有特殊的理化性质,释放出来的胶体可以与污染物结合,从而对回灌区地下水中污染物迁移产生显著影响,增加地下水污染的风险性。为此,讨论了地下水人工回灌过程中胶体与污染物的共迁移,包括吸附机制和迁移作用及影响条件,研究结果为保障地下水质量安全、促进人工回灌技术发展、预防和改善环境地质提供借鉴。

Artificial recharge can effectively recharge groundwater aquifers and prevent seawater intrusion.However,the injection of recharge water will break the balance of the original groundwater’s chemical field and kinetic field,resulting in the release of a large number of colloids from the solid-phase medium into the groundwater.Colloids can combine with pollutants due to their special physicochemical properties,thus significantly affecting the migration of pollutants in groundwater in the recharge area.This increases the risk of groundwater pollution.Therefore,the co-migration of colloids and pollutants during the groundwater artificial recharge process,including the adsorption mechanism and migration effect,as well as the affecting factors were discussed,which would provide implications for groundwater security,development of artificial recharge technology,and enviromental geology problems prevention and improvement.