Liu Zhongmou, Wang Xianze, Luo Zhen, Huo Mingxin, Wu Jinghui, Huo Hongliang, Yang Wu
School of Environment, Northeast Normal University, Changchun 130117, China.
Wuxi Xindu Environmental Protection Technology Co., Ltd. Wuxi 214215, China.
PLoS One. 2015 Dec 1;10(12):e0143819. doi: 10.1371/journal.pone.0143819. eCollection 2015.
The magnetic graphene oxide (MGO) was successfully synthesised by the in situ chemical co-precipitation method with Fe3+, Fe2+ and graphene oxide (GO) in laboratory and, was used as an adsorbent for disinfection by-product (DBP) precursors removing from four natural surface water samples. The results indicate that various DBPs formation significantly decreased by 7-19% to 78-98% for the four samples after MGO treatment and, the treatment process was rapidly reached equilibrium within 20 minutes. The DBP precursors removal efficiency decreased with the increasing pH value from 4 to 10. Hydrophobic compounds (humic acid and fulvic acid) are more sensitive to MGO, whereas hydrophilic and nitrogenous compounds (aromatic proteins) are more insensitive. MGO could be regenerated by using 20% (v/v) ethanol and, the DBP precursors removal efficiency can stay stable after five cycles. These results indicate that MGO can be utilized as a promising adsorbent for the removal of DBP precursors from natural surface water.
通过在实验室中采用原位化学共沉淀法，以Fe3+、Fe2+和氧化石墨烯（GO）成功合成了磁性氧化石墨烯（MGO），并将其用作吸附剂，用于去除四个天然地表水样品中的消毒副产物（DBP）前体。结果表明，经MGO处理后，四个样品中各种DBP的形成显著降低了7%-19%，降至78%-98%，且处理过程在20分钟内迅速达到平衡。随着pH值从4增加到10，DBP前体的去除效率降低。疏水性化合物（腐殖酸和富里酸）对MGO更敏感，而亲水性和含氮化合物（芳香族蛋白质）则不太敏感。MGO可用20%（v/v）乙醇再生，经过五个循环后，DBP前体的去除效率仍可保持稳定。这些结果表明，MGO有望作为一种吸附剂用于去除天然地表水中的DBP前体。
