Emerging Contaminant Sources and Fate in Recharged Treated Wastewater, Lake Havasu City, ArizonaPec Sources and Fate
Emerging Contaminant Sources and Fate in Recharged Treated Wastewater, Lake Havasu City, ArizonaPec Sources and Fate
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亚利桑那州哈瓦苏湖城回灌处理废水中的新兴污染物来源和归宿Pec 来源和归宿
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
T. Jones
中科院分区：
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作者：
Doyle C. Wilson;T. Jones
2008年，亚利桑那州哈瓦苏湖市在其北部地区污水处理厂（NRP）开始了一项经处理的废水地下补给计划，以储存经处理的废水，计划在夏季季节性回收用于灌溉。作为一项积极措施，该市决定监测一系列药品和其他新兴污染物（佩奇），沿着规定的监管成分，例如，硝酸盐确定了整个水系统中佩奇的潜在贡献源，导致在未经处理的饮用水和经处理的饮用水中仅检测到六种成分，浓度均低于50 ng/L。在城市9处理过的废水流中鉴定出40种佩奇中的33种，浓度范围从略高于检测水平到9000 ng/L（伪麻黄碱），清楚地表明这些化合物在当地城市的主要用途。NRP处理过的废水通过渗流带注入威尔斯井再充入。它通过冲积扇沉积物迁移，其中一些含有间隙粘土，形成水丘并与科罗拉多河含水层的地下水混合。NRP处理废水中存在的33种佩奇中有16种在注入威尔斯150 m（492 ft）范围内的浓度高于检测限（>10 ng/L）。六种佩奇（磺胺甲恶唑、卡马西平、扑米酮、苯妥英、N，N-二乙基-间甲苯酰胺[DEET]和甲丙氨酯）在监测威尔斯井中仍高于其各自的检测限，这些井穿透了距离注入威尔斯井560 m（1，840英尺）以上的基本不含粘土的沉积物。
In 2008, Lake Havasu City, Arizona, began a treated wastewater subsurface recharge program at its North Regional Wastewater Treatment Plant (NRP) to store treated wastewater, which is planned to be seasonally recovered for irrigation during the summer months. As a proactive measure, the city decided to monitor a suite of pharmaceuticals and other emerging contaminants (PECs) along with required regulatory constituents, e.g., nitrate. Potential contributing sources of PECs throughout the water system were identified, resulting in only six constituents detected in the untreated drinking water and treated drinking water, all at concentrations less than 50 ng/L. Thirty-three of 40 PECs analyzed were identified in the city9s treated wastewater streams, with concentrations ranging from just above the detection level to 9000 ng/L (pseudoephedrine), clearly showing the dominating local urban use of these compounds. NRP treated wastewater is recharged via vadose zone injection wells. It migrates through alluvial fans sediments, some containing interstitial clays, forming a water mound and blending with groundwater of the Colorado River Aquifer. Sixteen of 33 PECs present in the NRP treated wastewater have concentrations above detection limits (>10 ng/L) within 150 m (492 ft) of the injection wells. Six PECs (sulfamethoxazole, carbamazepine, primidone, phenytoin, N,N-diethyl-meta-toluamide [DEET], and meprobamate) remained above their respective detection limit in monitoring wells that penetrate sediments largely free of clay more than 560 m (1,840 ft) away from the injection wells.