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Disinfection is an indispensable water treatment process for killing harmful pathogens and protecting human health. However, the disinfection has caused significant public concern due to the formation of toxic disinfection by-products(DBPs). Lots of studies on disinfection and DBPs have been performed in the world since 1974. Although related studies in China started in1980 s, a great progress has been achieved during the last three decades. Therefore, this review summarized the main achievements on disinfection and DPBs studies in China, which included:(1) the occurrence of DBPs in water of China,(2) the identification and detection methods of DBPs,(3) the formation mechanisms of DBPs during disinfection process,(4) the toxicological effects and epidemiological surveys of DBPs,(5) the control and management countermeasures of DBPs in water disinfection, and(6) the challenges and chances of DBPs studies in future. It is expected that this review would provide useful information and reference for optimizing disinfection process, reducing DBPs formation and protecting human health. 相似文献
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生态毒性是危险废物的危险特性鉴别指标之一,生态毒性鉴别指标确定的基础是关于毒性化学物质和固体废物的生态毒理学(评估指标)研究.比较研究了国外毒性物质和危险废物的生态毒性鉴别指标及其制定的方法学,分析了中国的研究现状,对中国危险废物生态毒性鉴别指标制定的方法学提出了建议. 相似文献
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The white rot fungi are members of Basidiomycota, which can degrade lignin and form white rot. They are high producers of extracellular laccases. In the present study, pure culture strain of high-temperature and high-laccase production types (numbered as BUA-01) was isolated from the fruiting bodies of a white rot fungus collected in the campus of Beijing University of Agriculture. The taxonomic characteristic was determined based on morphological and ITS sequence analysis. Furthermore, the optimal culture conditions for the mycelia were determined, including carbon source, nitrogen source, C/N ratio, growth factors, temperature, and pH. Extracellular laccase production was investigated in liquid fermentation with different concentrations of Cu (CuSO4) as inducer. Decolorizing activity of the fermentation broth was assayed using three azo dyes: Evans blue, methyl orange, and eriochrome black T. The results showed that the strain possessed the highest homology toward Trametes hirsuta, with the homology ratio of 100% and the genetic distance of 0, suggesting that the strain BUA-01 belonged to the genus Trametes. The culture condition investigated revealed that the optimal condition for mycelia growth included the following: carbon source, starch; nitrogen source, soybean powder and yeast extract; C/N ratio, 40/1 and 10/1; temperature, 37 °C; and pH, 6.0-7.0. The assayed growth factors had no significant effect on mycelial growth. It demonstrated high laccase activity in liquid fermentation. The highest extracellular laccase activity of 1 081.33 ± 6.3 U/mL was observed in the broth with a Cu adjunction concentration of 0.25 mmol/L after a 96-h culture period. It was about 26-fold higher than that of the control group. The isolated strain exhibited significant decolorizing activity toward the azo dyes Evans blue, methyl orange, and eriochrome black T, with the decolorization rate at 12 h of 93.31% ± 0.16%, 92.37% ± 0.42%, 79.25% ± 0.64%, respectively. This suggests that the strain possesses potential applications in laccase production and dye degradation. © 2018 Science Press. All rights reserved. 相似文献
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代谢表面活性剂菌处理含油污泥的研究 总被引:6,自引:0,他引:6
试验采用异位生物修复技术堆肥法,对某炼厂油泥进行生物修复处理研究.用微生物代谢的表面活性剂对油泥进行预处理,洗脱油泥中部分油分后进行堆肥试验,投加从油田含油土壤中获得的以石油为唯一碳源、代谢高效生物表面活性剂的微生物C-2菌、F-2菌以及无机营养物和疏松剂(锯末),降解油泥中的石油污染物.经过外源微生物和内源微生物共同作用120 d,油泥中的石油烃总量由22 910 mg/kg下降到3 000 mg/kg以下.试验利用色谱-质谱联用方法分析了降解前后石油组分的变化.菌株经传统方法鉴定为蜡状芽孢杆菌、枯草芽孢杆菌. 相似文献
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为明确地下水污染高风险区环境管控目标,快速识别优先控制污染物,于2022年以典型产业集聚区为研究对象,利用污染源产排污状况和地下水基础环境状况调查结果,将污染评价和环境风险相结合,优选污染源超标率、地下水环境污染等级、生物毒性参数和环境迁移转化参数作为筛选因子,利用层次分析法和综合分析法,计算各污染指标综合得分,建立筛选地下水优先控制污染物的方法体系。筛选结果显示,该产业集聚区的优先控制污染物相关指标包括:硝酸盐、耗氧量、石油类、总硬度、亚硝酸盐、镍、锌、硫酸盐、甲苯、氨氮等。筛选结果与园区主导行业产排污特征和地下水质量现状相符,具有一定的可靠性,可为科学、精准管控高风险区地下水质量提供依据。 相似文献
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Shengdong Liu Enxiang Shang Jingnan Liu Yining Wang Nanthi Bolan M.B. Kirkham Yang Li 《Frontiers of Environmental Science & Engineering》2022,16(1):8