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作 者:隋雪晴 左尚武 周磊[1] 张雪琦 王月圆 卢烨彬 杨扬[3] 成水平[1,4] SUI Xueqing;ZUO Shangwu;ZHOU Lei;ZHANG Xueqi;WANG Yueyuan;LU Yebin;YANG Yang;CHENG Shuiping(Key Laboratory of Yangtze River Water Environment,Ministry of Education,Institute of Eco-environmental Engineering,College of Environmental Science and Engineering,Tongji University,Shanghai 200092;Power China Huadong Engineering Corporation Limited,Hangzhou 311122;Department of Ecology,Engineering Research Center for Tropical and Subtropical Aquatic Ecological Engineering,Ministry of Education,Jinan University,Guangzhou 510632;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092)
机构地区:[1]同济大学环境科学与工程学院,同济大学环境生态工程研究所,上海200092 [2]中国电建集团华东勘测设计研究院有限公司,杭州311122 [3]暨南大学生态学系,热带亚热带水生态工程教育部工程研究中心,广州510632 [4]上海污染控制与生态安全研究院,上海200092
出 处:《环境科学学报》2025年第1期177-187,共11页Acta Scientiae Circumstantiae
基 金:国家自然科学基金(No.52170168);中国电建集团华东勘测设计研究院有限公司科技项目(No.HDY-CGHT19-20240098Y)。
摘 要:为实现生活污水中抗生素的绿色高效去除,选取4种抗生素(磺胺甲噁唑(SMX)、甲氧苄啶(TMP)、土霉素(OTC)和环丙沙星(CIP))为对象,构建垂直流人工湿地小试装置,比较研究在低浓度(3.77~11.5μg·L^(-1))、高浓度(185~350μg·L^(-1))两种抗生素污染水平下,完全饱和和部分饱和人工湿地的水质净化效果,并探究抗生素的去除规律.结果表明,与饱和人工湿地相比,部分饱和人工湿地内部溶解氧与氧化还原电位跨度增大,其化学需氧量和总氮的去除率分别为77.9%~88.4%和66.1%~80.3%,分别是饱和人工湿地去除率的2.31~3.40倍和1.44~1.73倍.各组人工湿地对于抗生素的去除效果良好,去除率在72.8%~99.5%之间.高浓度抗生素条件下,部分饱和人工湿地相对于饱和人工湿地优势显著,其出水中SMX、TMP和OTC的平均浓度分别为20.8、3.73和3.96μg·L^(-1),分别比饱和人工湿地降低了32.5%、71.1%和33.0%.人工湿地沿程抗生素浓度分析表明,抗生素的去除主要发生在不饱和层及饱和层上部20 cm的空间内,在部分饱和人工湿地中,这两个区域分别占总去除贡献的41.4%~78.1%和22.5%~51.1%.偏最小二乘路径分析显示,氧化还原条件是影响该人工湿地净化效果的首要因素.To achieve the green and efficient removal of antibiotics from domestic sewage,four species of antibiotics(sulfamethoxazole(SMX),methotrexate(TMP),oxytetracycline(OTC),and ciprofloxacin(CIP))were selected as the targeted pollutants.Small-scale vertical flow constructed wetlands(VFCWs)were established to compare the water purification performance of two saturation levels of constructed wetlands(fully saturated,2/3partially saturated)under two different concentration ranges of antibiotics(3.77 to 11.5μg·L^(-1);185 to 350μg·L^(-1)),and to explore the internal rules of antibiotics’removal.The results showed that the 2/3 partially saturated VFCW had a larger variation in dissolved oxygen and oxidation-reduction potential,the removal efficiencies of chemical oxygen demand(COD)and total nitrogen(TN)were 77.9%to 88.4%and 66.1%to 80.3%,which were2.31 to 3.40 times and 1.44 to 1.73 times of those in the fully saturated VFCW,respectively.Each VFCW exhibited significant efficacy in removing antibiotics,with removal rate ranging from 72.8%to 99.5%.Under the higher concentration of antibiotics,the partially saturated VFCW demonstrated an advantage in removing antibiotics.The average concentrations of SMX,TMP and OTC in the effluent were 20.8,3.73 and 3.96μg·L^(-1),respectively,which represented a reduction of 32.5%,71.1%and 33.0%compared with those of the fully saturated VFCW.The vertical distribution of antibiotic concentration showed that antibiotics were primarily removed in the unsaturated layer and the upper 20 cm of the saturated layer.In the 2/3 partially saturated VFCW,those two regions accounted for 41.4%to 78.1%and 22.5%to 51.1%of the total removal contribution,respectively.Partial least squares path analysis indicated that the oxidation-reduction condition was the primary factor affecting the purification efficiency of the VFCW in this study.
分 类 号:X703[环境科学与工程—环境工程]
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