Pleurotus ostreatus spent mushroom compost as green biosorbent for nickel (II) biosorption

Abstract

The potential of Pleurotus ostreatus spent mushroom compost (PSMC) as a green biosorbent for nickel (II) biosorption was investigated in this study. A novel approach of using the half-saturation concentration of biosorbent to rapidly determine the uptake, kinetics and mechanism of biosorption was employed together with cost per unit uptake analysis to determine the potential of this biosorbent. Fifty per cent nickel (II) biosorption was obtained at a half-saturation constant of 0.7 g biosorbent concentration, initial pH in the range of 4-8, 10 min contact time, 50 mL 50 mg/L nickel (II) initial concentration. The experimental data were well fitted with the Langmuir isotherm model and the maximum nickel (II) biosorption was 3.04 mg/g. The results corresponded well to a second pseudo order kinetic model with the coefficient of determination value of 0.9999. Based on FTIR analysis, the general alkyl, hydroxyl or amino, aliphatic alcohol and carbonyl functional groups of biosorbent were involved in the biosorption process. Therefore, biosorption of nickel (II) must involve several mechanisms simultaneously such as physical adsorption, chemisorption and ion exchange. Cost comparison for PSMC with Amberlite IRC-86 ion exchange resin indicates that the biosorbent has the potential to be developed into a cost effective and environmentally friendly treatment system.

Mn(II) Ions Biosorption from Aqueous Solution Using <i>Pleurotus</i> Spent Mushroom Compost under Batch Experiment

“…At low pH, high H + concentration caused protonation of the biosorbent active binding sites. The charge repulsion occurred and thus, reduces Mn(II) ions biosorption [15,16]. As the pH increased, the biosorbent active binding sites were deprotonated and the charge attraction occurred between the active binding sites and Mn(II) ions.…”

“…This was due to at high concentrations, the number of active binding sites for biosorption process to occur is less compared to the number of Mn(II) ions present and thus reduced the Mn(II) ions biosorption. In addition, the initial concentration also provides a driving force to solve the mass transfer resistance in the Mn(II) ions biosorption [16]. factor of equilibrium, R L , which defined by Webi and Chakravort [18] was used to predict whether the biosorption system is favourable or unfavourable and the values are shown in Table 1.…”

Cloning and characterisation of ACC oxidase gene from Mas (AA) banana

“…The same sample of PMSS [2,3] was used by sterilising it at 121 o C with 18 psi for 15 minutes and air-dried at the of temperature 60 o C. Dried sample of PMSS was ground into particle size of 710 µm and later rinsed with ultra pure water, twice to remove impurities. Finally, PMSS was again air dried at 60 ºC and stored in a desiccator.…”

“…Recent studies on Pleurotus Mushroom SpentSubstrate (PMSS) for use as the green biosorbent for nickel (II) and copper (II) have been carried out [2,3]. PMSS has shown the potential to be developed as a low environmental impact remediation technology.…”

Environmental Applications of Chitosan and Its Derivatives

“…Crab shells have effectively been used to decontaminate metals (e.g., Pb, Cd, Cu, and Cr) in wastewater Kim 2003). Fungus mycelium biomass has recently emerged as a promising new source of chitinous material to potentially remediate contaminated wastewater (Kamari et al 2011a, b;Tay et al 2011aTay et al , b, 2012. The commercial value of employing chitosan for environmental applications may be enhanced considerably by modifying its structure and chemical functionalization.…”