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All figures (9)
Fig. 1. Biosorption capacity of different agro-industrial wastes and by-products.
Fig. 4. Comparison of (a) individual and (b) total metal ions adsorbed and released in biosorption process (initial heavy metal conc.: 50 mg/L).
Table 4. Biosorption capacities of various adsorbents.
Table 3. Isotherm constants of two- and three-parameter models for Cd(II), Cu(II), Pb(II) and Zn(II) adsorption (initial metal conc.: 10–500 mg/L).
Table 1. FTIR spectra and SEM images of (a) unloaded and (b) metal loaded-biosorbents.
Fig. 5. Van't Hoff plots for Cd(II), Cu(II), Pb(II) and Zn(II) adsorption(initial pH 5.5 ± 0.1; initial metal conc.: 1–50 mg/L; contact time: 3 h; biosorbent dose: 5 g/L).
Table 2. Adsorption rate constants, the estimated qe and the coefficients of correlation associated with the Lagergren pseudo-first and pseudo-second order, kinetic models.
Fig. 3. Effect of (a) initial pH of solution, (b) contact time, (c) biosorbent dose and (d) biosorbent particle size on Cd(II), Cu(II), Pb(II) and Zn(II) adsorption (room temperature, 22 ± 2 °C; initial metal conc.: 50 mg/L).
Table 5. Thermodynamic parameters, ∆G° (kJ/mol), ∆H° (kJ/mol) and ∆S° (kJ/mol K), for adsorption of Cd(II), Cu(II), Pb(II) and Zn(II) adsorption.
Journal Article
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DOI
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A breakthrough biosorbent in removing heavy metals: Equilibrium, kinetic, thermodynamic and mechanism analyses in a lab-scale study
[...]
Atefeh Abdolali
1
,
Huu Hao Ngo
1
,
Wenshan Guo
1
,
Shaoyong Lu
,
Shiao-Shing Chen
2
,
Nguyen Cong Nguyen
2
,
Xinbo Zhang
3
,
Jie Wang
4
,
Yun Wu
4
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+5 more
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Institutions (4)
University of Technology, Sydney
1
,
National Taipei University of Technology
2
,
Tianjin Urban Construction Institute
3
,
Tianjin Polytechnic University
4
15 Jan 2016
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Science of The Total Environment