School of Environment, Tsinghua University, Beijing 100084, China.
School of Environment, Tsinghua University, Beijing 100084, China.
Sci Total Environ. 2014 Sep 15;493:481-6. doi: 10.1016/j.scitotenv.2014.06.005. Epub 2014 Jun 22.
Groundwater recharge using reclaimed water is considered a promising method to alleviate groundwater depletion, especially in arid areas. Traditional water treatment systems are inefficient to remove all the types of contaminants that would pose risks to groundwater, so it is crucial to establish a priority list of organic compounds (OCs) that deserve the preferential treatment. In this study, a comprehensive ranking system was developed to determine the list and then applied to China. 151 OCs, for which occurrence data in the wastewater treatment plants were available, were selected as candidate OCs. Based on their occurrence, exposure potential and ecological effects, two different rankings of OCs were established respectively for groundwater recharge by surface infiltration and direct aquifer injection. Thirty-four OCs were regarded as having no risks while the remaining 117 OCs were divided into three groups: high, moderate and low priority OCs. Regardless of the recharge way, nonylphenol, erythromycin and ibuprofen were the highest priority OCs; their removal should be prioritized. Also the database should be updated as detecting technology is developed.
利用再生水进行地下水补给被认为是缓解地下水枯竭的一种有前途的方法，特别是在干旱地区。传统的水处理系统无法有效去除所有可能对地下水构成风险的污染物，因此建立优先处理的有机化合物 (OC) 清单至关重要。在这项研究中，开发了一个综合排名系统来确定清单，然后将其应用于中国。选择了 151 种 OC，因为它们在废水处理厂中有出现数据。基于它们的出现、暴露潜力和生态效应，分别为地表水渗透和直接含水层注入的地下水补给建立了两种不同的 OC 排名。34 种 OC 被认为没有风险，而其余 117 种 OC 分为高、中、低优先级 OC 三类。无论补给方式如何，壬基酚、红霉素和布洛芬都是优先级最高的 OC；应优先考虑它们的去除。随着检测技术的发展，还应更新数据库。
