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Facilitated Prediction of Micropollutant Degradation via UV-AOPs in Various Waters by Combining Model Simulation and Portable Measurement

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Engineering 2024年第6期37卷 87-95页

作者： Yanyan Huang Mengkai Li Zhe Sun Wentao Li James R.Bolton zhimin qiang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Department of Civil and Environmental Engineering University of AlbertaEdmontonAB T6G 1H9Canada State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

The degradation of micropollutants in water via ultraviolet(UV)-based advanced oxidation processes(AOPs)is strongly dependent on the water *** reactive radicals(RRs)formed in UV-AOPs have different reaction selectivities toward water matrices and degradation efficiencies for target ***,process selection and optimization are *** study developed a facilitated prediction method for the photon fluence-based rate constant for micropollutant degradation(K′_(p,MP))in various UV-AOPs by combining model simulation with portable *** methods for measuring the scavenging capacities of the principal RRs(RRSCs)involved in UV-AOPs(i.e.,HO^(·),SO_(4)^(·-),and Cl^(·))using a mini-fluidic photoreaction system were *** simulation models consisted of photochemical,quantitative structure–activity relationship,and radical concentration steady-state approximation *** RRSCs were determined in eight test waters,and a higher RRSC was found to be associated with a more complex water ***,by taking sulfamethazine,caffeine,and carbamazepine as model micropollutants,the k′_(p,MP) values in various UV-AOPs were predicted and further verified experimentally.A lower k′_(p,MP) was found to be associated with a higher RRSC for a stronger RR competition;for example,k′_(p,MP) values of 130.9 and 332.5 m^(2) einstein^(–1),respectively,were obtained for carbamazepine degradation by UV/H_(2)O_(2) in the raw water(RRSC=9.47×10^(4) s^(-1))and sand-filtered effluent(RRSC=2.87×10^(4) s^(-1))of a drinking water treatment *** developed method facilitates process selection and optimization for UV-AOPs,which is essential for increasing the efficiency and cost-effectiveness of water treatment.

关键词： UV-AOPs Micropollutant degradation Reactive radicals Water matrix Model simulation

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水力条件对供水管网微生物影响研究进展

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给水排水 2024年第6期50卷 164-169页

作者：房志伟杨川徐强强志民中国科学院生态环境研究中心饮用水科学与技术重点实验室北京100085 中国科学院大学北京100049 北京市自来水集团水质监测中心北京100085

供水管网内微生物异常增殖会降低水质,威胁用户用水安全,因此控制管网微生物是保障饮用水安全的重要措施。管网微生物的生长和去除受到管网水力条件的影响,且在管网不同位置处所受影响程度不同。综述了水力停留时间和流速对管网微生物... 详细信息

供水管网内微生物异常增殖会降低水质,威胁用户用水安全,因此控制管网微生物是保障饮用水安全的重要措施。管网微生物的生长和去除受到管网水力条件的影响,且在管网不同位置处所受影响程度不同。综述了水力停留时间和流速对管网微生物生长的影响,以及水力冲刷对生物膜的去除作用,发现水力停留时间和流速对微生物量与群落结构有显著影响,水力冲刷对不同条件下形成的管壁生物膜去除效果不同,研究结果可为供水管网微生物控制的研究和应用提供重要参考。

关键词：供水管网水力条件微生物

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城镇污水处理厂抗生素抗性基因的环境传播途径与机制

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给水排水 2024年第5期50卷 153-160页

作者：李俊谊孙喆强志民贲伟伟中国科学院生态环境研究中心饮用水科学与技术重点实验室北京100085 中国科学院大学资源与环境学院北京100190 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085

城镇污水处理厂是抗生素抗性基因(ARGs)发生转移、传播的重要场所,同时也是环境中ARGs污染的主要来源。对城镇污水处理厂中ARGs向环境介质中的传播途径、影响因素与传播机制进行了综述。结果表明,ARGs可通过出水排放、污泥土地施用、再... 详细信息

城镇污水处理厂是抗生素抗性基因(ARGs)发生转移、传播的重要场所,同时也是环境中ARGs污染的主要来源。对城镇污水处理厂中ARGs向环境介质中的传播途径、影响因素与传播机制进行了综述。结果表明,ARGs可通过出水排放、污泥土地施用、再生水灌溉、气溶胶逸散等途径迁移至环境介质(如受纳水体、土壤、空气)中;ARGs在环境介质中的扩散和存留行为受介质理化性质影响;ARGs在环境介质中主要通过可移动遗传元件(MGEs)介导的水平基因转移(HGT)传播耐药性。

关键词：城镇污水处理厂抗生素抗性基因环境介质传播途径传播机制

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An insight into the removal of fluoroquinolones in activated sludge process:Sorption and biodegradation characteristics

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Journal of Environmental Sciences 2017年第6期29卷 263-271页

作者： Lu Wang zhimin qiang Yangang Li Weiwei Ben Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

The detailed sorption steps and biodegradation characteristics of fluoroquinolones （FQs） including ciprofloxacin, enrofloxacin, lomefloxacin, norfloxacin, and ofioxacin were investigated through batch experiments. The results indicate that FQs at a total concentration of 500 μg/L caused little inhibition of sludge bioactivity. Sorption was the primary removal pathway of FQs in the activated sludge process, followed by biodegradation, while hydrolysis and volatilization were negligible. FQ sorption on activated sludge was a reversible process governed by surface reaction, Henry and Freundlich models could describe the FQ sorption isotherms well in the concentration range of 100-300 μg/L. Thermodynamic parameters revealed that FQ sorption on activated sludge is spontaneous, exothermic, and enthalpy-driven. Hydrophobicity-independent mechanisms determined the FQ sorption affinity with activated sludge. The zwitterion of FQs had the strongest sorption affinity, followed by cation and anion, and aerobic condition facilitated FQ sorption. PQs were slowly biodegradable, with long half-lives （〉100 hr）. FQ biodegradation was enhanced with increasing temperature and under aerobic condition, and thus was possibly achieved through co-metabolism during nitrification. This study provides an insight into the removal kinetics and mechanism of FQs in the activated sludge process, but also helps assess the environmental risks of FQs resulting from sludge disposal.

关键词： Fluoroquinolones Sorption Biodegradation Activated sludge

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Modeling iron release from cast iron pipes in an urban water distribution system caused by source water switch

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Journal of Environmental Sciences 2021年第12期33卷 73-83页

作者： Xiaodan Lin qiang Xu Yuxian Li Bei Zhao Li Li zhimin qiang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Beijing Waterworks Group Co.Ltd. Beijing 100031China University of Chinese Academy of Sciences Beijing 100049China

Significant iron release from cast iron pipes in water distribution systems(WDSs),which usually occurs during the source water switch period,is a great concern of water utilities because of the potential occurrence of"red water"and customer *** study developed a new method which combined in-situ water stagnation experiments with mathematical models and numerical simulations to predict the iron release caused by source water ***-situ water stagnation experiments were conducted to determine the total iron accumulation in nine cast iron pipes in-service in Beijing when switching the local water to tre ated Danjiangkou Reservior *** showe d that the difference in the concentration increment of total iron in 24 hr(ΔCITI,24),***-term iron release,caused by source water switch was mainly dependent on the difference in the key quality parameters(pH,hardness,nitrate,Larson Ratio and dissolved oxygen(DO))between the two source *** iron release rate(RFe)after switch,***-term iron release,was closely related to the pipe properties as well as the DO and total residual chlorine(TRC)*** models ofΔCITI,24 and RFe were developed to quantitatively reveal the relationship between iron release and the key quality *** RFe model could successfully combine with EPANET-MSX,a numerical simulator of water quality for WDSs to extend the iron release modeling from pipe level to network *** new method is applicable to predicting iron release during source water switch,thus facilitating water utilities to take preventive actions to avoid"red water".

关键词： Iron release modeling Source water switch In-situ water stagnation Water distribution systems

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Simultaneous determination of three classes of antibiotics in the suspended solids of swine wastewater by ultrasonic extraction,solid-phase extraction and liquid chromatography-mass spectrometry

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Journal of Environmental Sciences 2011年第10期23卷 1729-1737页

作者： Xun Pan zhimin qiang Weiwei Ben Meixue Chen Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

This work describes a systematic approach to the development of a method for simultaneous determination of three classes of veterinary antibiotics in the suspended solids （SS） of swine wastewater, including five sulfonamides, three tetracyclines and one macrolide （tiamulin）. The entire procedures for sample pretreatment, ultrasonic extraction （USE）, solid-phase extraction （SPE）, and liquid chromatography-mass spectrometry （LC-MS） quantification were examined and optimized. The recovery efficiencies were found to be 76%-104% for sulfonamides, 81%-112% for tetracyclines, and 51%--64% for tiamulin at three spiking levels. The intra-day and inter-day precisions, as expressed by the relative standard deviation （RSD）, were below 17%. The method detection limits （MDLs） were between 0.14 and 7.14 μg/kg, depending on a specific antibiotic studied. The developed method was applied to field samples collected from three concentrated swine feeding plants located in Beijing, Shanghai and Shandong province of China. All the investigated antibiotics were detected in both SS and liquid phase of swine wastewater, with partition coefficients （logKd） ranging from 0.49 to 2.30. This study demonstrates that the SS can not be ignored when determining the concentrations of antibiotics in swine wastewater.

关键词： antibiotics swine wastewater suspended solids ultrasonic extraction solid-phase extraction mass spectrometry

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腈纶废水有机物的紫外高级氧化去除机制及反应动力学模拟

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环境科学学报 2024年第3期44卷 61-70页

作者：胡月张文珍李彦刚胡俊王辉李文涛强志民浙江工业大学环境学院杭州310014 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085 北京城市排水集团有限责任公司北京100022 中国石油化工股份有限公司石油化工科学研究院北京100083

紫外高级氧化工艺(UV-AOP)可高效去除工业废水中的难降解有机物,然而,实际废水中成分复杂的有机物的降解去除机制和反应动力学研究还比较缺乏,限制了相关工艺的规模化应用.以某石化企业腈纶废水为对象,探究了UV/H_(2)O_(2)及VUV/UV/H_(2... 详细信息

紫外高级氧化工艺(UV-AOP)可高效去除工业废水中的难降解有机物,然而,实际废水中成分复杂的有机物的降解去除机制和反应动力学研究还比较缺乏,限制了相关工艺的规模化应用.以某石化企业腈纶废水为对象,探究了UV/H_(2)O_(2)及VUV/UV/H_(2)O_(2)工艺对废水有机物的降解去除机制并开展反应动力学分析.结果表明,腈纶废水有机物芳香性低,主要荧光组分为富里酸类和腐殖酸类物质.两种UV-AOP均可高效降解去除腈纶废水有机物,且相同处理条件下VUV/UV光源对有机物的去除效率略优于UV光源,原因在于VUV辐射的引入增加了反应体系中HO·的生成(增加了H_(2)O途径并强化了H_(2)O_(2)途径).在投加200 mg·L^(-1)H_(2)O_(2)、反应120 min后(UV剂量为23.4 J·cm^(-2)),UV/H_(2)O_(2)和VUV/UV/H_(2)O_(2)对酸性废水中COD的去除率分别为80.4%和91.3%.不同处理条件下腈纶废水有机物去除的单位能耗为0.154~0.193 kWh·g^(-1)COD,且处理后废水对费氏弧菌的发光抑制率都明显低于初始值,表明两种工艺在实际腈纶废水处理中具有较好的应用前景.基于废水有机物去除的拟一级动力学规律和自由基浓度稳态假设模型,计算得到了有机物(以DOC计)在UV辐射和HO·氧化作用下的反应速率常数,分别为1.83×10^(-6)cm^(2)·mJ^(-1)和1.24×10^(7)L·moL^(-1)·s^(-1).在此基础上,开发了可准确模拟腈纶废水有机物去除的计算流体动力学(CFD)模型,为工艺实际应用时的效能评估和参数优化提供了支持.

关键词： VUV/UV/H_(2)O_(2) 工业废水单位能耗急性毒性反应速率常数计算流体动力学(CFD)

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Formation control of bromate and trihalomethanes during ozonation of bromide-containing water with chemical addition: Hydrogen peroxide or ammonia?

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Journal of Environmental Sciences 2021年第12期33卷 111-118页

作者： Zhengdi Wu Yubin Tang Weiwei Li zhimin qiang Huiyu Dong Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Engineering Design Institute The Sixth Engineering Bure CrecBeijing 100036China University of Chinese Academy of Sciences Beijing 100049China

To ensure the safety of drinking water,ozone (O3) has been extensively applied in drinking water treatment plants to further remove natural organic matter (NOM).However,the surface water and groundwater near the coastal areas often contain high concentrations of bromide ion (Br-).Considering the risk of bromate (Br O3-) formation in ozonation of the sand-filtered water,the inhibitory efficiencies of hydrogen peroxide (H2O2) and ammonia(NH3) on Br O3-formation during ozonation process were *** addition of H2O2effectively inhibited Br O3-formation at an initial Br-concentration amended to 350μg/*** inhibition efficiencies reached 59.6 and 100%when the mass ratio of H2O2/O3was 0.25and>0.5,*** UV254and total organic carbon (TOC) also decreased after adding H2O2,while the formation potential of trihalomethanes (THMs FP) increased especially in subsequent chlorination process at a low dose of *** control the formation of both Br O3-and THMs,a relatively large dose of O3and a high ratio of H2O2/O3were generally ***3addition inhibited Br O3-formation when the background ammonia nitrogen(NH3–N) concentration was *** was no significant correlation between Br O3-inhibition efficiency and NH3dose,and a small amount of NH3–N (0.2 mg/L) could obviously inhibit Br *** oxidation of NOM seemed unaffected by NH3addition,and the structure of NOM reflected by synchronous fluorescence (SF) scanning remained almost unchanged before and after adding *** the formation of Br O3-and THMs,the optimal dose of NH3was suggested to be 0.5 mg/L.

关键词： Bromate Trihalomethanes Ozone Hydrogen peroxide Ammonia Water treatment

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Disinfection by-product(DBP) research in China:Are we on the track?

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Journal of Environmental Sciences 2021年第12期33卷 99-110页

作者： Huiyu Dong Haifeng Zhang Yan Wang zhimin qiang Min Yang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesUniversity of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100085China

Disinfection by-products(DBPs) formed during water disinfection has drawn significant public concern due to its toxicity. Since the first discovery of the trihalomethanes in 1974,continued effort has been devoted on DBPs worldwide to investigate the formation mechanism, levels, toxicity and control measures in drinking water. This review summarizes the main achievements on DBP research in China, which included:(1) the investigation of known DBP occurrence in drinking water of China;(2) the enhanced removal of DBP precursor by water treatment process;(3) the disinfection optimization to minimize DBP formation;and(4) the identification of unknown DBPs in drinking water. Although the research of DBPs in China cover the whole formation process of DBPs, there is still a challenge in effectively controlling the drinking water quality risk induced by DBPs, an integrated research framework including chemistry, toxicology, engineering, and epidemiology is especially crucial.

关键词： Disinfection by-products Occurrence Precursor Unknown identification

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Adsorption behavior of sulfamethazine in an activated sludge process treating swine wastewater

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Journal of Environmental Sciences 2014年第8期26卷 1623-1629页

作者： Weiwei Ben zhimin qiang Xiaowei Yin Jiuhui Qu Xun Pan Key Laboratory of Aquatic Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Foreign Economic Cooperation Office Ministry of Environmental Protection

Swine wastewater is an important pollution source of antibiotics entering the aquatic environment. In this work,the adsorption behavior of sulfamethazine（SMN）,a commonlyused sulfonamide antibiotic,on activated sludge from a sequencing batch reactor treating swine wastewater was investigated. The results show that the adsorption of SMN on activated sludge was an initially rapid process and reached equilibrium after 6 hr. The removal efficiency of SMN from the water phase increased with an increasing concentration of mixed liquor suspended solids,while the adsorbed concentration of SMN decreased. Solution pH influenced both the speciation of SMN and the surface properties of activated sludge,thus significantly impacting the adsorption process. A linear partition model could give a good fit for the equilibrium concentrations of SMN at the test temperatures（i.e.,10,20 and 30°C）. The partition coefficient（Kd） was determined to be 100.5 L/kg at 20°C,indicating a quite high adsorption capacity for SMN. Thermodynamic analysis revealed that SMN adsorption on activated sludge was an exothermic process. This study could help to clarify the fate and behavior of sulfonamide antibiotics in the activated sludge process and assess consequent environmental risks arising from sludge disposal as well.

关键词： Sulfonamide antibiotics Activated sludge Adsorption Swine wastewater treatment

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