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Characterization of the Adsorption of Cu (II) from Aqueous Solutions onto Pyrolytic Sludge-Derived Adsorbents

1
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
2
University of Chinese Academy of Sciences, Beijing 100082, China
3
The Environmental Research Institute; MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
4
College of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510000, China
*
Author to whom correspondence should be addressed.
Water 2018, 10(12), 1816; https://doi.org/10.3390/w10121816
Received: 22 November 2018 / Revised: 6 December 2018 / Accepted: 7 December 2018 / Published: 10 December 2018
(This article belongs to the Special Issue Removal of Heavy Metals from Wastewater)
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Abstract

The adsorption of Cu (II) onto two typical types of pyrolytic sludge was investigated in this study. The examined conditions include pH, adsorption time, and temperature, as well as the dosage of adsorbents. Results show that the adsorbents removed the Cu (II) effectively. The adsorbent made from pyrolyzed paper mill sludge (CuMS) exhibited exceptional performance, with a removal efficiency of around 100%. Moreover, the adsorption of Cu (II) onto CuMS was not affected by pH in the range of 3–9. The kinetic data showed better conformation with the pseudo-second-order kinetic model, and the adsorption processes of the CuMS fit well to the Langmuir isotherm model. The adsorption capacity reached 4.90 mg·g−1 under appropriate conditions. Microscopic analysis and FT-IR analysis revealed that the adsorbent with porous structure and high monosilicate content was beneficial to Cu (II) adsorption. Thus, the CuMS is a potentially promising candidate for retaining Cu (II) in aqueous environments. View Full-Text
Keywords: pyrolytic sewage sludge; adsorbent; Cu (II) adsorption characterizations pyrolytic sewage sludge; adsorbent; Cu (II) adsorption characterizations
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Wang, M.; Chen, T.; Yan, B.; Li, L.; Xu, D.; Xiao, X. Characterization of the Adsorption of Cu (II) from Aqueous Solutions onto Pyrolytic Sludge-Derived Adsorbents. Water 2018, 10, 1816.

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