title: [Effects of reclaimed water recharge on groundwater quality: a review].
abstract: Reclaimed water recharge to groundwater is an effective way to relieve water resource crisis. However, reclaimed water contains some pollutants such as nitrate, heavy metals, and new type contaminants, and thus, there exists definite environmental risk in the reclaimed water recharge to groundwater. To promote the development of reclaimed water recharge to groundwater and the safe use of reclaimed water in China, this paper analyzed the relevant literatures and practical experiences around the world, and summarized the effects of different reclaimed water recharge modes on the groundwater quality. Surface recharge makes the salt and nitrate contents in groundwater increased but the risk of heavy metals pollution be smaller, whereas well recharge can induce the arsenic release from sedimentary aquifers, which needs to be paid more attention to. New type contaminants are the hotspots in current researches, and their real risks are unknown. Pathogens have less pollution risks on groundwater, but some virus with strong activity can have the risks. Some suggestions were put forward to reduce the risks associated with the reclaimed water recharge to groundwater in China.
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China. wpchen@rcees.ac.cn
authors.forename: Wei-Ping
authors.initials: WP
authors.lastname: Chen
authors.forename: Si-Dan
authors.initials: SD
authors.lastname: Lü
authors.forename: Mei-E
authors.initials: ME
authors.lastname: Wang
authors.forename: Wen-Tao
authors.initials: WT
authors.lastname: Jiao
mesh_terms: D057914:Agricultural Irrigation / Q000379:methods / Q000706:statistics & numerical data; D002681:China; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods; D060587:Groundwater / Q000032:analysis*; D018570:Risk Assessment; D014865:Waste Disposal, Fluid / Q000379:methods*; D014866:Waste Products / Q000009:adverse effects; D062065:Wastewater / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000331:legislation & jurisprudence / Q000379:methods; D060753:Water Quality
chemical_list: D014866:Waste Products; D062065:Wastewater; D014874:Water Pollutants, Chemical