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| 1 | Disinfection by-product(DBP) research in China:Are we on the track?显示文摘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. | Huiyu Dong Haifeng Zhang Yan Wang Zhimin Qiang Min Yang | 2021 | Journal of Environmental Sciences2021，33，12： | 4 |
| 2 | 纳米微孔链状PAS-PDMDAAC混凝剂制备条件的优化与表征显示文摘以硫酸铝(AS)和二甲基二烯丙基氯化铵聚合物(PDMDAAC)为原料制备了无机-有机复合混凝剂(PASPDMDAAC),并利用其对页岩气钻井废水中TOC的去除率为响应值,采用响应面法中Box-Behnken实验设计,优化了制备工艺条件。结果表明:复合混凝剂制备工艺条件对页岩气钻井废水中TOC的去除率影响显著性依次为反应温度>反应时间>Al/PDMDAAC质量比;在响应曲面法模拟优化条件下,PAS-PDMDAAC复合混凝剂对页岩气钻井废水中TOC的去除率为74.35%;当反应温度为70℃,反应时间为70 min,AS/PDMDAAC质量比为6时,制备的复合混凝剂对页岩气钻井废水中TOC的去除率偏差为0.72%,符合实验精度要求。通过微观结构表征发现:PAS-PDMDAAC复合混凝剂中存在聚合羟基铝;AS水解形成羟基铝后,通过静电作用与PDMDAAC复合成规则的纳米微孔链状空间结构,并通过混凝实验溶液中Zeta电位变化,进一步验证了复合混凝剂中因静电作用使其电中和能力减弱的结论,此时复合混凝剂的最佳pH为6,弱酸性条件可避免铝盐类复合混凝剂的沉淀,以上研究结果为提高无机-有机复合混凝剂的混凝效果提供了参考。 | 朱天菊 陈春燕 来进和 刘蕊 | 2020 | 环境工程学报2020，14，1： | 3 |
| 3 | Impact of pre-oxidation on the formation of byproducts in algae-laden water disinfection:Insights from fluorescent and molecular weight显示文摘Pre-oxidation has been reported to be an effective way to remove algal cells in water, but the released algal organic matter (AOM) could be oxidized and lead to the increment in disinfection by-product (DBP) formation. The relationship between pre-oxidation and AOM-derived DBP formation needs to be approached more precisely. This study compared the impact of four pre-oxidants, ozone (O), chlorine dioxide (ClO), potassium permanganate(KMnO) and sodium hypochlorite (NaClO), on the formation of nitrogenous (N-) and carbonaceous (C-) DBPs in AOM chlorination. The characterization (fluorescent properties,molecular weight distribution and amino acids concentration) on AOM samples showed that the characterization properties variations after pre-oxidation were highly dependent on the oxidizing ability of oxidants. The disinfection experiments showed that Oincreased DBP formation most significantly, which was consistent with the result of characterization properties variations. Then canonical correspondent analysis (CCA) and Pearson’s correlation analysis were conducted based on the characterization data and DBP formation. CCA indicated that C-DBPs formation was highly dependent on fluorescent data. The formation of haloacetic acids (HAAs) had a positive correlation with aromatic protein-like component while trichloromethane (TCM) had a positive correlation with fulvic acid-like component.Pearson’s correlation analysis showed that low molecular weight fractions were favorable to form N-DBPs. Therefore, characterization data could provide the advantages in the control of DBP formation, which further revealed that KMnOand ClOwere better options for removing algal cells as well as limiting DBP formation. | Da Sheng Lingjun Bu Shumin Zhu Yangtao Wu Jue Wang Nan Li Shiqing Zhou | 2022 | Journal of Environmental Sciences2022，34，7： | 2 |
| 4 | 水华鱼腥藻(Anabaena aquae)不同生长阶段的产嗅特征和藻源有机物特性显示文摘水华鱼腥藻(Anabaena aquae)是一种水体中常见的优势蓝藻,为水中嗅味的重要来源,且生长过程中释放的藻源有机物(AOM)对于水质有较大的影响。研究水华鱼腥藻不同生长阶段的产嗅特征和AOM特性对于藻污染控制有重要意义。建立水华鱼腥藻生长曲线,提取不同生长阶段的胞内与胞外有机物,通过气质联用分析、三维荧光扫描和液相-有机碳测试(liquid chromatography coupled with organic carbon detection,LC-OCD)等表征手段,对水华鱼腥藻生长过程中的胞内外嗅味物质和有机物的变化情况进行多维度解析。结果表明,本实验培养条件下水华鱼腥藻所产的嗅味物质主要是β-紫罗兰酮和β-环柠檬醛,主要存在于胞内有机物,平均浓度为2.90μg·L^(-1)和1.53μg·L^(-1)。其产嗅能力随着藻细胞的生长而减弱。AOM呈现出低分子亲水性的特征。三维荧光分析结果表明,胞外有机物主要含有类腐殖质物质和溶解性微生物代谢产物,胞内有机物内主要含有溶解性微生物代谢物质、络氨酸和色氨酸。生长过程中胞内有机物和嗅味物质随藻细胞的破裂逐渐泄露到胞外,胞内外有机物的组分不会发生较大变化,其浓度随生长阶段的不同会发生相应的改变。LC-OCD结果显示,AOM主要由低分子有机物构成,且溶解性有机氮含量较高。 | 张孟雨 米记茹 李桂芳 宋武昌 张素珍 孙韶华 王永磊 贾瑞宝 | 2022 | 生态毒理学报2022，17，2： | 1 |
| 5 | News:JES articles received the Publication Awards of Eco-Environmental Knowledge Web显示文摘Two articles published in Journal of Environmental Sciences(JES)received the Publication Awards of Eco-Environmental Knowledge Web.A ceremony of the Publication Awards of Eco-Environmental Knowledge Web was held at the 2019 Annual Conference of Chinese Society for Environmental Sciences in Xian,Shanxi,China,on August 23-25,2019.The Chair of Eco-Environmental Knowledge Web,Dr.Litian Zhang,and the Chair of the Symposium of Advance of Membrane Separation Technology,Dr.Chengzhi Hu,co-hosted the ceremony(Fig.1). | | 2020 | Journal of Environmental Sciences2020，32，1： | 0 |
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