10.26091/ESRNZ.9730277.v1
Lie Yang
Lie
Yang
Liuyang He
Liuyang
He
Jianming Xue
Jianming
Xue
Yongfei Ma
Yongfei
Ma
Hong Li
Hong
Li
Pai Peng
Pai
Peng
Ming Li
Ming
Li
Zulin Zhang
Zulin
Zhang
Highly efficient nickel (II) removal by sewage sludge biochar supported α-Fe2O3 and α-FeOOH: Sorption Characteristics and Mechanisms
Institute of Environmental Science and Research
2019
Nickel (II) ion
Ni (II)
Ni Contamination
Adsorption Kinetic Study
Sewage Sludge Biochar
Adsorption mechanism
Soil contamination
Modified sludge biochar
Environmental Chemistry
Inorganic Chemistry
Environmental Management
Environmental Monitoring
Environmental Science
2019-08-27 21:21:17
Journal contribution
https://research.esr.cri.nz/articles/journal_contribution/Highly_efficient_nickel_II_removal_by_sewage_sludge_biochar_supported_-Fe2O3_and_-FeOOH_Sorption_Characteristics_and_Mechanisms/9730277
A novel approach was employed to load α-Fe2O3 and α-FeOOH onto sewage sludge biochar (SBC) with the purpose of efficient nickel (Ni) removal. A high Ni(II) adsorption capacity of 35.50 mg·g-1 in 100 ppm Ni(II) solution with 10 mg modified sewage sludge biochar (MSBC) was achieved. The adsorption kinetic and isotherm were fitted well by the pseudo-second-order model and the Langmuir model, respectively. The optimal pH was found around a neutral pH of 7. The adsorption mechanisms of Ni(II) onto MSBC were described as the synergistic effects of electrostatic attraction, ion exchange, inner-sphere complexation and co-precipitation. The initial rapid adsorption phenomenon could be attributed to electrostatic attraction and ion exchange, and then inner-sphere complexation and co-precipitation acted as a crucial role in the following step. The remarkable performance of MSBC provides an effective waste utilization approach to simultaneous sewage sludge recycle and Ni removal from aqueous solution.