Adsorption-Desorption Characteristics of Nonylphenol on Two Different Origins of Black Carbon |
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| Authors: | Guanghuan Cheng Mingyang Sun Xinlei Ge Yang Ou Xinhua Xu Qi Lin Liping Lou |
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| Institution: | 1.Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET),Nanjing University of Information Science and Technology,Nanjing,People’s Republic of China;2.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing,People’s Republic of China;3.Department of Environmental Engineering,Zhejiang University,Hangzhou,People’s Republic of China;4.Key Laboratory of Water Pollution Control and Environmental Safety Technology,Zhejiang University,Hangzhou,People’s Republic of China |
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| Abstract: | 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. |
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