Efficacy of carbonaceous nanocomposites for sorbing ionizable antibiotic sulfamethazine from aqueous solution.
Efficacy of carbonaceous nanocomposites for sorbing ionizable antibiotic sulfamethazine from aqueous solution.
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碳质纳米复合材料从水溶液中吸附可电离抗生素磺胺二甲嘧啶的功效
DOI：
10.1016/j.watres.2016.03.014
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发表时间：
2016-05
期刊：
影响因子：
--
通讯作者：
Cheng Min
中科院分区：
文献类型：
--
作者：
Zhang Chen;Lai Cui;Zeng Guangming;Huang Danlian;Yang Chunping;Wang Yang;Zhou Yaoyu;Cheng Min
本文研究了新型碳纳米复合材料对磺胺二甲嘧啶（SMT）的吸附影响因素和机理，以及在土壤存在和不存在的条件下以及老化前后，苛刻老化对SMT吸附的影响。通过在羧基官能化的多壁碳纳米管溶液中浸涂秸秆生物质，然后在300 °C和600 °C下在不存在空气的情况下热解来合成碳纳米复合材料。高温碳纳米复合材料在SMT上的吸附性能优异，测量的吸附分配系数为103-105.5L kg−1。将碳纳米复合材料单独老化或通过暴露于营养物和土壤提取物（生物老化）或80 °C持续100 d（化学老化）与土壤混合来老化。在土壤和/或生物和化学老化的存在下，没有观察到对SMT吸附的苛刻老化的明显影响。吸附机理主要包括货车力引起的分配作用和氢键作用及π-π电子-给体-受体相互作用引起的吸附。综合考虑成本、可再生性和对真实的水样的应用，碳纳米复合材料在去除废水中的SMT和可能的其他持久性有机污染物方面具有潜力。
This paper investigated the key factors and mechanisms of sulfamethazine (SMT) sorption on a novel carbonaceous nanocomposite, and the effects of harsh aging on SMT sorption in the presence and absence of soil and before as well as after aging. The carbonaceous nanocomposites were synthesized by dip-coating straw biomass in carboxyl functionalized multi-walled carbon nanotubes solution and then pyrolyzed at 300 °C and 600 °C in the absence of air. The sorption performance of high temperature carbonaceous nanocomposite on SMT was excellent, as measured sorption distribution coefficient in the order of 103–105.5L kg−1. Carbonaceous nanocomposites were aged either alone or mixed with soil via exposure to nutrients and soil extract (biological aging) or 80 °C for 100 d (chemical aging). No obvious effects of harsh aging on SMT sorption were observed in the presence of soil and/or biological and chemical aging. The primary mechanisms for SMT sorption included partition caused by Van der Waals forces and adsorption caused by hydrogen bonding and π-π electron-donor-acceptor interaction. Comprehensively considering the cost, renewability, and the application to real water samples, the carbonaceous nanocomposites have potential in removal of SMT and possibly other persistent organic pollutants from wastewater.
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