当前位置：
X-MOL 学术
›
Environ. Sci. Technol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Susceptibility of the Algal Toxin Microcystin-LR to UV/Chlorine Process: Comparison with Chlorination.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-07-09 , DOI: 10.1021/acs.est.8b00034 Xiaodi Duan 1 , Toby Sanan 2 , Armah de la Cruz 2 , Xuexiang He 1 , Minghao Kong 1 , Dionysios D Dionysiou 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-07-09 , DOI: 10.1021/acs.est.8b00034 Xiaodi Duan 1 , Toby Sanan 2 , Armah de la Cruz 2 , Xuexiang He 1 , Minghao Kong 1 , Dionysios D Dionysiou 1
Affiliation
|
Microcystin-LR (MC-LR), an algal toxin (cyanotoxin) common in sources of drinking water, poses a major human health hazard due to its high toxicity. In this study, UV/chlorine was evaluated as a potentially practical and effective process for the degradation of MC-LR. Via mass spectrometry analysis, fewer chlorinated-MC-LR products were detected with UV/chlorine treatment than with chlorination, and a transformation pathway for MC-LR by UV/chlorine was proposed. Different degrees of rapid degradation of MC-LR were observed with varying pH (6–10.4), oxidant dosage (0.5–3 mg L–1), natural organic matter (0–7 mg L–1), and natural water sources. In contrast to the formation of primarily chloroform and dichloroacetic acid in deionized water where MC-LR serves as the only carbon source, additional chlorinated disinfection byproducts were produced when sand filtered natural water was used as a background matrix. The UV/chlorine treated samples also showed quantitatively less cytotoxicity in vitro in HepaRG human liver cell line tests than chlorination treated samples. Following 16 min (96 mJ cm–2) of UV irradiation combined with 1.5 mg L–1 chlorine treatment, the cell viability of the samples increased from 80% after exposure to 1 mg L–1 MC-LR to 90%, while chlorination treatment evidenced no reduction in cytotoxicity with the same reaction time.
中文翻译：
藻毒素微囊藻毒素-LR对UV /氯过程的敏感性：与氯化作用的比较。
微囊藻毒素-LR（MC-LR）是饮用水中常见的藻毒素（氰毒素），由于其高毒性而对人类健康构成重大危害。在这项研究中，紫外线/氯被认为是降解MC-LR的潜在实用方法。通过质谱分析，用UV /氯处理检测到的氯化MC-LR产物少于用氯化法检测到的产物，并提出了用UV /氯转化MC-LR的途径。在不同的pH值（6-10.4），氧化剂剂量（0.5-3 mg L -1），天然有机物（0-7 mg L - 1）下观察到MC-LR的不同程度的快速降解。）和天然水源。与在去离子水中主要由氯仿和二氯乙酸形成（MC-LR是唯一碳源）相反，当使用经沙子过滤的天然水作为背景基质时，会产生额外的氯化消毒副产物。在HepaRG人肝细胞试验中，经UV /氯处理的样品在体外的细胞毒性也比经氯化处理的样品在数量上少。经过16分钟（96 mJ cm –2）的紫外线照射和1.5 mg L –1氯处理后，样品的细胞活力从暴露于1 mg L –1 MC-LR后的80％增加到90％，同时进行了氯化在相同的反应时间下，治疗未证明细胞毒性降低。
更新日期：2018-07-10
中文翻译：
藻毒素微囊藻毒素-LR对UV /氯过程的敏感性：与氯化作用的比较。
微囊藻毒素-LR（MC-LR）是饮用水中常见的藻毒素（氰毒素），由于其高毒性而对人类健康构成重大危害。在这项研究中，紫外线/氯被认为是降解MC-LR的潜在实用方法。通过质谱分析，用UV /氯处理检测到的氯化MC-LR产物少于用氯化法检测到的产物，并提出了用UV /氯转化MC-LR的途径。在不同的pH值（6-10.4），氧化剂剂量（0.5-3 mg L -1），天然有机物（0-7 mg L - 1）下观察到MC-LR的不同程度的快速降解。）和天然水源。与在去离子水中主要由氯仿和二氯乙酸形成（MC-LR是唯一碳源）相反，当使用经沙子过滤的天然水作为背景基质时，会产生额外的氯化消毒副产物。在HepaRG人肝细胞试验中，经UV /氯处理的样品在体外的细胞毒性也比经氯化处理的样品在数量上少。经过16分钟（96 mJ cm –2）的紫外线照射和1.5 mg L –1氯处理后，样品的细胞活力从暴露于1 mg L –1 MC-LR后的80％增加到90％，同时进行了氯化在相同的反应时间下，治疗未证明细胞毒性降低。
京公网安备 11010802027423号