Study of the binding regularity and corresponding mechanism of drinking water odorous compound 2-MIB with coexisting dissolved organic matter
Study of the binding regularity and corresponding mechanism of drinking water odorous compound 2-MIB with coexisting dissolved organic matter
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饮用水恶臭化合物2-MIB与共存溶解性有机物的结合规律及相应机理研究
DOI：
10.1016/j.cej.2020.125015
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发表时间：
2020-09
影响因子：
15.1
通讯作者：
Yu Shuili
中科院分区：
文献类型：
--
作者：
Li Lei;Li Junyi;Zhu Cuiwen;Yu Shuili
2-甲基异冰片（2-MIB）是饮用水中味道和气味（T&O）的主要原因，它往往与共存的溶解有机物（DOM）结合，导致2-MIB的物理化学性质及其在水处理过程中相应的迁移和去除行为的改变。在本研究中，通过透析和超滤来区分结合的和游离的 2-MIB，并研究了不同类型的 DOM 与 2-MIB 的结合。 298 K 时，代表 2-MIB 与模型污染物结合能力的 Freundlich 常数 KF((ng/mg)(L/ng)1/n) 的顺序为：鸡蛋清溶菌酶 (HEL 22.52) > 牛血清白蛋白 (BSA 19.23) > 羧甲基纤维素钠 (CMC 9.69) > 钠海藻酸盐（SA 7.78）和腐殖质与 2-MIB 表现出弱关联，表明芳香结构提供很少的结合位点。真实原水中的天然有机物（NOM 196.15）由于成分复杂且分子量分布较宽，其KF远大于模型污染物。 DOM和2-MIB之间的主要相互作用是范德华力和氢键，除了HEL是疏水相互作用。常见的金属离子会影响这些关联并普遍降低 KF。本研究的结果对于选择适当的策略来维持水源地 T&O 爆发期间的水质具有特别重要的意义。
2-Methylisoborneol (2-MIB), a major cause of taste and odor (T&O) in drinking water, tends to combine with the coexisting dissolved organic matter (DOM), resulting in the altering of the physico-chemical properties of 2-MIB, and its corresponding migration and removal behaviors during water treatment. In this study, dialysis and ultrafiltration were set up to differentiate bound and free 2-MIB, and the binding of different types of DOMs to 2-MIB was investigated. At 298 K, the Freundlich constants, KF((ng/mg)(L/ng)1/n), representing the combination ability between 2-MIB and the model pollutants, followed the order hen egg-white lysozyme (HEL 22.52) > bovine serum albumin (BSA 19.23) > sodium carboxymethyl cellulose (CMC 9.69) > sodium alginate (SA 7.78), and humic substances exhibited a weak association with 2-MIB, indicating that aromatic structures provide few binding sites. The KFof natural organic matter (NOM 196.15) in real raw water was much larger than that of model pollutants owing to the complex composition and the wide molecular weight distribution. The major interactions between DOM and 2-MIB were van der Waals forces and hydrogen bonding, except that HEL were hydrophobic interactions. Common metal ions affected these associations and generally decreased KF. The findings in this study are of particular significance for the selection of proper strategy to maintain the water quality during the outbreak of T&O in the source.
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影响因子：
11.4
作者：
K. Maskaoui;A. Hibberd;John L. Zhou
通讯作者：
K. Maskaoui;A. Hibberd;John L. Zhou
影响因子：
8.6
作者：
Tansel, Berrin;Sager, John;Bauer, Jan
通讯作者：
Bauer, Jan
DOI：
10.18307/2012.0214
发表时间：
2012
期刊：
Journal of Lake Sciences
影响因子：
--
作者：
Chen Xiaofeng;Chuai Xiaoming;Liu Tao;Y. Liuyan
通讯作者：
Chen Xiaofeng;Chuai Xiaoming;Liu Tao;Y. Liuyan
影响因子：
9.9
作者：
Woo-Kul Lee;J. Ko;Hyun-Man Kim
通讯作者：
Woo-Kul Lee;J. Ko;Hyun-Man Kim
DOI：
10.1016/j.saa.2014.01.132
发表时间：
2014-05
期刊：
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
影响因子：
--
作者：
C. Xu;J. Gu;Xiping Ma;Tian Dong;X. Meng
通讯作者：
C. Xu;J. Gu;Xiping Ma;Tian Dong;X. Meng