摘要
采用次氯酸钠氧化结合粉末活性炭与超滤(NaClO-PAC-UF)组合工艺处理污水厂二级出水,考察NaClO投加量与水样的pH、温度对二级出水中抗生素抗性基因(ARGs)和溶解性有机物(DOC)去除效果的影响。结果表明,氧化阶段向水中添加次氯酸钠氧化剂有效氯浓度8.0 mg/L时去除效果最优,组合工艺对二级出水中不同类型ARGs(tetA、tetC、tetG、sulⅠ、sulⅡ)的去除量为10^(3.25)~10^(3.47)copies/mL,对细胞态和游离态ARGs去除效果明显增强;组合工艺对DOC去除率可达到57.5%,且对于不同分子量有机物的去除率整体都得到提高;升高温度以及降低pH皆能提升组合工艺对ARGs的去除效果。
The secondary effluent of the sewage treatment plant was treated by sodium hypochlorite oxidation combined with powdered activated carbon and ultrafiltration process(NaClO-PAC-UF).The effects of the dosage of NaClO,pH and temperature on the removal of antibiotic resistance genes(ARGs)and dissolved organic carbon(DOC)in the secondary effluent were investigated.The results show that 8.0 mg/L effective chlorine concentration of sodium hypochlorite oxidizing agent was the best removal effect.The removal amount of different types of ARGs(tetA,tetC,tetG,sulⅠ,sulⅡ)in secondary effluent was 10^(3.25)~10^(3.47)copies/mL.The removal effect of cellular and free ARGs was significantly enhanced.The removal rate of DOC by the combined process was up to 57.5%,and the removal rate of organic matter with different molecular weight was improved overall.Increasing temperature and decreasing pH can improve the removal effect of ARGs by the combined process.
作者
孙丽华
马瑶
史鹏飞
冯萃敏
SUN Li-hua;MA Yao;SHI Peng-fei;FENG Cui-min(Key Laboratory of Urban Rainwater System and Water Environment,Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Environmental and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.,Beijing 100082,China)
出处
《应用化工》
CAS
CSCD
北大核心
2023年第2期361-365,371,共6页
Applied Chemical Industry
基金
国家自然科学基金(52070011)。
