Abstract
To solve the problem of heavy metal pollution and agricultural wastes reclamation, spent substrate of pleurotus ostreatus (SSPO) was used as adsorbent to remove Zn2+ from aqueous solution. The biosorption of zinc ions on SSPO was studied as a function of the solution pH, temperature and initial Zn2+ concentration. The equilibrium sorption data were well represented by linear Langmuir isotherm models with R2 value of 0.9955 and non-linear Freundlich with R2 value of 0.9973. The BET surface area of SSPO can reach 51.16m2g−1. SEM-EDX and XRD revealed that (NH4)2Zn·H2O and Zn2PO4(OH) were the main compounds in metal-loaded SSPO. FTIR analysis indicated the governing functional groups such as O-H, N-H and P=O played an important role in biosorption. The desorption studies showed the reversibility of SSPO. The results indicate that SSPO is a potential adsorbent in wastewater treatment due to its great sorption capacity and low cost.
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Hu, X., Yan, L., Gu, H. et al. Biosorption mechanism of Zn2+ from aqueous solution by spent substrates of pleurotus ostreatus. Korean J. Chem. Eng. 31, 1911–1918 (2014). https://doi.org/10.1007/s11814-014-0206-0
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DOI: https://doi.org/10.1007/s11814-014-0206-0