Adsorption-Desorption Characteristics of Nonylphenol on Two Different Origins of Black Carbon
Adsorption-Desorption Characteristics of Nonylphenol on Two Different Origins of Black Carbon
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DOI：
10.1007/s11270-017-3490-6
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发表时间：
2017-07
期刊：
影响因子：
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通讯作者：
Guanghuan Cheng;Mingyang Sun;X. Ge;Yang Ou;Xinhua Xu;Q. Lin;Liping Lou
中科院分区：
文献类型：
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作者：
Guanghuan Cheng;Mingyang Sun;X. Ge;Yang Ou;Xinhua Xu;Q. Lin;Liping Lou
炭黑具有吸附能力强、生产成本低、二次污染少等优点，被认为是一种很有前途的有机污染物治理新材料。然而，很少有人系统研究BC与内分泌干扰污染物(EDCs)和持久性有机污染物(POPs)之间的吸附-解吸特性及其相互作用机理。因此，本研究通过研究稻草黑碳(RC)和飞灰碳(FC)对NP的吸附等温线、吸附动力学、pH效应以及解吸动力学等特性，探讨BC修复水环境中NP污染的可行性。吸附等温线数据表明，RC和FC的Qmax分别为61,889.21±2777.68和6538.99±606.72 mg/kg，n分别为0.39±0.037和0.55±0.043，表明RC对NP的吸附容量和非线性度远高于FC，表明BC是一种有效的NP污染控制吸附剂，尤其是RC。PH值通过影响BC的表面性质和NP的形态，从而影响BC对NP的吸附能力。解吸动力学数据表明，两种BCS都不能释放出80%以上的NP，这表明当BC用于NP污染修复时，BC可以明显降低水环境中NP的释放风险。
Black carbon (BC) is considered to be a promising novel material for controlling organic contaminants due to its strong adsorption property, low production cost, and less secondary pollution. However, seldom systemic research was conducted to investigate adsorption-desorption characteristics and interaction mechanism between BC and nonylphenol (NP), one kind of endocrine-disrupting contaminants (EDCs) and persistent organic pollutants (POPs). Therefore, in the present study, adsorption characteristics of NP on two BCs (rice straw black carbon (RC) and fly ash carbon (FC)) involving adsorption isotherm, kinetics, effect of pH, as well as desorption kinetics, were investigated to explore the feasibility of BC for remediation of NP pollution in a water environment. Adsorption isotherm data showed that Q max was 61,889.21±2777.68 and 6538.99±606.72 mg/kg and n was 0.39±0.037 and 0.55±0.043 for RC and FC, respectively, suggesting the sorption capacity and nonlinearity of RC to NP is far higher than FC and indicating BC was an effective sorbent for NP pollution control, especially RC. The pH affected BC sorption capacity to NP by influencing the surface properties of BC and the NP speciation together. Desorption kinetics data indicated that more than 80% NP could not be released from both BCs, suggesting that BC could reduce NP releasing risk in a water environment evidently when BC is applied for NP pollution remediation.