Contrastive analysis of nickel (II), iron (II), copper (II), and chromium (VI) removal using modified Chlorella vulgaris and Spirulina platensis: Characterization and recovery studies

被引:11
|
作者
Musah, Baba Imoro [1 ,2 ]
Wan, Peng [3 ]
Xu, Yifeng [1 ,2 ]
Liang, Chuanzhou [1 ,2 ]
Peng, Lai [1 ,2 ]
机构
[1] Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Luoshi Rd 122, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Peoples R China
[3] China Energy Conservat DADI Environm Remediat Co L, Xueqing Rd 8, Beijing 100000, Peoples R China
来源
基金
中国国家自然科学基金;
关键词
Simultaneous biosorption; Chlorella vulgaris; Spirulina platensis; Removal efficiency; Thermodynamics studies; Multi-component systems; AQUEOUS-SOLUTION; ZERO CHARGE; WASTE-WATER; ADSORPTION; BIOSORPTION; IONS; EQUILIBRIUM; KINETICS; ENHANCEMENT; MECHANISMS;
D O I
10.1016/j.jece.2022.108422
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The concurrent removal of Nickel (II), Chromium (VI), Iron (II), and Copper (II) using chemically modified Chlorella vulgaris and Spirulina platensis biomass from water has been studied. The Brunauer-Emmett-Teller (BET) revealed surface areas of 10.9, 9.6, 14.0, and 17.5 m(2)/g for the modified biosorbents CV-NC, CV-KC, SP-KC, and CV-KC respectively while the unmodified biosorbents were 1.5 and 2.7 m(2)/g for CV and SP respectively. The maximum removal efficiencies of Ni (II), Fe (II), Cr (VI), and Cu (II) ions from the multi-metal biosorption media were 100%, 96%, 85%, and 57% respectively. Similarly, the optimum pH conditions for maximum removal of Ni (II), Fe (II), Cr (VI), and Cu (II) were pH 5, 2-3, 2, and 6 respectively using a biosorbent dosage of 0.3 g and at a temperature of 25 degrees C. The maximum biosorption capacities were 16.2, 14.2, 26.7, and 9.4 mg/g for CV-NC, CV-KC, SP-KC, and CV-KC, respectively. The Fourier transform infrared (FTIR) spectra showed the presence of amide peaks (1659-1535 cm(-1)) which improved the metal removal efficiency. The Energy dispersive spectroscopy (EDS) data showed the presence of Na+, Ca2+, Mg2+, and K+ cations in both algae species which promoted the binding properties of the biosorbents. The equilibrium data were best modelled by Langmuir > Freundlich > Temkin models respectively. The Freundlich constant n values were between 1.52 and 7.38, suggesting favourable biosorption. The Gibbs free energy (delta G degrees) values for Ni (II) were from 0.9 to 5.8, Cu (II) from 6.6 to 9.9, Cr (VI) from 4.3 to 5.9, and Fe (II) from 0.5 to 3.4 kJ/mol which confirmed physisorption. Cu (II) showed the maximum desorption of 56.1% (HNO3) and 47.3% (H3PO4) from the spent SP-KC and SP-NC respectively. This study has shown that modified algae biomass is suitable for the effective removal of multi-metal ions from water.
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页数:18
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