具有特定性质的多壁碳纳米管用于药物和个人护理产品的动态过滤
Multi-walled carbon nanotubes with selected properties for dynamic filtration of pharmaceuticals and personal care products.
作者信息
Wang Yifei, Ma Jing, Zhu Jiaxin, Ye Ning, Zhang Xiaolei, Huang Haiou
机构信息
State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China.
State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China; Department of Environmental Health Sciences, Bloomberg School of Public Health, The John Hopkins University, 615 North Wolfe Street, MD, 21205, USA.
出版信息
Water Res. 2016 Apr 1;92:104-12. doi: 10.1016/j.watres.2016.01.038. Epub 2016 Jan 21.
In this study, multi-walled carbon nanotubes (MWCNT) with selected properties, including pristine MWCNT, hydroxylated MWCNT (H-MWCNT), thin-walled MWCNT with large inner diameter (L-MWCNT), aminated MWCNT, and high-purity MWCNT were investigated for dynamic removal of eight pharmaceuticals and personal care products (PPCP). The removal ratios of different PPCP by the pristine MWCNT followed a decreasing order of triclosan (0.93) > prometryn (0.71) > 4-acetylamino-antipyrine (0.67) > carbendazim (0.65) > caffeine (0.42) > ibuprofen (0.34) > acetaminophen (0.29) at 100 min of filtration. Similar or even higher PPCP removals were obtained for all PPCP as the influent concentration decreased, suggesting potential consistent PPCP removals at environmental PPCP concentrations. The removal ratio of acetaminophen was increased to 0.74 by using H-MWCNT. SRFA (Suwannee River fulvic acid) suppressed PPCP adsorption to MWCNT, to greater extents with increasing SRFA concentrations. The L-MWCNT, despite a large inner diameter of 52 ± 3 nm, did not provide better resistance to the competitive adsorption of SRFA than MWCNT with a small inner diameter of 10 ± 2 nm. Future research will be conducted to minimize the effect of SRFA and facilitate application of MWCNT to the treatment of PPCP-contaminated water.
在本研究中，对具有选定特性的多壁碳纳米管（MWCNT）进行了研究，包括原始MWCNT、羟基化MWCNT（H-MWCNT）、大内径薄壁MWCNT（L-MWCNT）、胺化MWCNT和高纯度MWCNT，以动态去除八种药物和个人护理产品（PPCP）。在过滤100分钟时，原始MWCNT对不同PPCP的去除率顺序为：三氯生（0.93）＞扑草净（0.71）＞4-乙酰氨基安替比林（0.67）＞多菌灵（0.65）＞咖啡因（0.42）＞布洛芬（0.34）＞对乙酰氨基酚（0.29）。随着进水浓度降低，所有PPCP的去除率相似甚至更高，这表明在环境PPCP浓度下可能实现一致的PPCP去除。使用H-MWCNT时，对乙酰氨基酚的去除率提高到了0.74。苏万尼河富里酸（SRFA）抑制了PPCP对MWCNT的吸附，且随着SRFA浓度增加抑制程度更大。尽管L-MWCNT的内径大至52±3纳米，但与内径小至10±2纳米的MWCNT相比，其对SRFA竞争吸附的抗性并未更好。未来将开展研究以尽量减少SRFA的影响，并促进MWCNT在处理受PPCP污染水体中的应用。
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