Efficiency and Products Investigations on the Ozonation of 2‐Methylisoborneol in Drinking Water
Efficiency and Products Investigations on the Ozonation of 2‐Methylisoborneol in Drinking Water
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DOI：
10.2175/106143009x425933
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发表时间：
2009-12
影响因子：
3.1
通讯作者：
F. Qi;Bingbing Xu;Zhong-lin Chen;Jun Ma;Dezhi Sun;Liqiu Zhang
中科院分区：
文献类型：
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作者：
F. Qi;Bingbing Xu;Zhong-lin Chen;Jun Ma;Dezhi Sun;Liqiu Zhang
2-甲基异龙脑(MIB)是一种由蓝藻和放线菌产生的次生代谢物，存在于一些饮用水源水中。研究了臭氧氧化对饮用水中MIB的去除效果、产物及降解途径。结果表明，无论初始MIB浓度如何，臭氧都能有效地去除水溶液中的MIB。羟基自由基(·OH)清除实验表明，羟基自由基参与了MIB的降解。用气相色谱-质谱法对MIB的降解产物进行了鉴定。樟脑是一种主要的降解产物，它被进一步氧化形成其他降解中间产物，如醛、酮和羧酸。提出了臭氧氧化MIB的可能降解途径。对醛的生成进行了定性和定量的分析。研究发现，甲醛、乙醛、丙醛、丁醛、乙二醛和甲基乙二醛是臭氧氧化MIB的主要醛类化合物。
2‐Methylisoborneol (MIB) is a terpenoid produced as a secondary metabolite by some cyanobacteria and actinomycetes and thus can be present in some drinking water source waters. The removal efficiency, products, and degradation pathway of MIB in drinking water by ozonation were studied. The results showed that ozone is efficient in removing MIB from an aqueous solution, regardless of the initial MIB concentration. Hydroxyl radicals (·OH) scavenger experiments indicated that hydroxyl radicals are involved in MIB degradation. The degradation products of MIB were identified by gas chromatography‐mass spectrometry. Camphor was identified as a primary degradation product, which was further oxidized to form other degradation intermediates, such as aldehydes, ketones, and carboxylic acids. A possible degradation pathway for the ozonation of MIB was proposed. Qualitative and quantitative analysis of the formation of aldehydes was carried out. It was found that six aldehydes are the main aldehydes products of ozonation of MIB, namely formaldehyde, acetaldehyde, propanal, butanal, glyoxal, and methyl glyoxal.