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Zhang, L., Yu, T., Nan, Z., Wu, Z., Li, B., Li, S. (2018). Application of the Modified Biochar from Sewage Sludge for Removal of Pb(II) from Aqueous Solution: Kinetics, Equilibrium and Thermodynamic Studies. Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 37(3), 161-169.
Lequn Zhang; Tao Yu; Zhongren Nan; Zhenjun Wu; Bin Li; Shunyi Li. "Application of the Modified Biochar from Sewage Sludge for Removal of Pb(II) from Aqueous Solution: Kinetics, Equilibrium and Thermodynamic Studies". Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 37, 3, 2018, 161-169.
Zhang, L., Yu, T., Nan, Z., Wu, Z., Li, B., Li, S. (2018). 'Application of the Modified Biochar from Sewage Sludge for Removal of Pb(II) from Aqueous Solution: Kinetics, Equilibrium and Thermodynamic Studies', Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 37(3), pp. 161-169.
Zhang, L., Yu, T., Nan, Z., Wu, Z., Li, B., Li, S. Application of the Modified Biochar from Sewage Sludge for Removal of Pb(II) from Aqueous Solution: Kinetics, Equilibrium and Thermodynamic Studies. Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 2018; 37(3): 161-169.

Application of the Modified Biochar from Sewage Sludge for Removal of Pb(II) from Aqueous Solution: Kinetics, Equilibrium and Thermodynamic Studies

Article 17, Volume 37, Issue 3 - Serial Number 89, May and June 2018, Page 161-169  XML PDF (411.61 K)
Document Type: Research Article
Authors
Lequn Zhang1; Tao Yu2; Zhongren Nan3; Zhenjun Wu4; Bin Li4; Shunyi Li email 4
1Key Laboratory of Western China’ s Environmental System, Ministry of Education, College of Resource and Environment, Lanzhou University, Lanzhou 730000, Gansu, P.R. CHINA
2School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, P.R. CHINA
3Key Laboratory of Western China’ s Environmental System, Ministry of Education, College of Resource and Environment, Lanzhou University, Lanzhou 730000, Gansu, P.R. CHINA
4chool of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan, P.R. CHINA
Abstract
An adsorbent Modified Biochar (MB) made from sewage sludge was characterized with FT-IR spectra and SEM image. The effects of contact time, solution temperature, pH and initial concentration on the adsorption performance Pb(II) onto MB was investigated in a batch adsorption experiment. Results showed that MB had great adsorption capacity, due to the existence of hydroxyl, carboxyl, ether, alcohol and amino groups. As the contact time prolonged, the adsorption quantity of MB increased sharply first and then tended to the balance. The adsorption capacity increased slightly with the temperature increase. The effect of pH on the absorbability of MB was non-linear, and the maximum adsorption capacity was obtained when the pH was approximately 6. The adsorption capacity increased abruptly first and then become slowly with the initial concentration increase. Compared with the pseudo-first-order, the pseudo-second-order kinetic models were more suitable to test the kinetic experimental data. Equilibrium data were analyzed using the Langmuir and Freundlich isotherm models and it was found to correspond to the Langmuir isotherm model better.
Keywords
Pb(II); Modified biochar; Adsorption kinetics; Adsorption isotherms; Adsorption mechanism
Main Subjects
Environmental Chemistry
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