Colloids and Surfaces A 538 (2018) 443–450 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research paper a,1 a,1 a,b a, Tao Wang , Cui Li , Chongqing Wang , Hui Wang School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: Biochar/MnAl-layered double hydroxides (LDH) composites were prepared to remove Cu (ΙΙ) from aqueous Biochar solution. The aﬀecting factors including sorbent dosage, initial pH and coexistence cations were investigated by Layered double hydroxide batch experiments. The data of X-ray diﬀraction (XRD), Fourier transform infrared (FTIR) and scanning electron Adsorption microscopy (SEM) equipped with energy dispersive spectrometer (EDS) showed that biochar/MnAl-LDH com- Heavy metal posites was successfully synthesized. The characterizations also indicated the adsorption process involved sur- Isomorphic substitution face precipitation Cu (OH) SO and isomorphic substitution of Mn (ΙΙ) with Cu (ΙΙ). Kinetics and isotherms 2.5 3 4 studies showed that Cu (ΙΙ) adsorption onto biochar/MnAl-LDH followed pseudo second order model and Langmuir model. The rate constant k increased with solution pH. The maximum adsorption capacity of Cu (ΙΙ) on
Colloids and Surfaces A: Physicochemical and Engineering Aspects – Elsevier
Published: Feb 5, 2018
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