Adsorption of Zn(2+) and Ni(2+) in a binary aqueous solution by biosorbents derived from sawdust and water hyacinth (Eichhornia crassipes).

摘要: The Zn 2+ and Ni adsorption capacities of six biosorbents derived from water hyacinth ( Eichhornia crassipes ) (WH) sawdust (SD) were investigated, with activated carbon as the control. raw biomass (WH, SD), charred WH (BWH) SD sulphonated bio-chars SD. effect initial solution pH concentrations on capacity was studied, isotherms for evaluated. significantly influenced p suppressed all biosorbents. statistically ≤ 0.05) similar to or higher than that carbon. effects pyrolysis bio-char sulphonation inconsistent dependent type; in most cases a better biosorbent original biomass, while resulted less comparable adsorption. Adsorption data obeyed at least one three (linear, Langmuir Freundlich) r 2 = 0.90-0.995, multi-metal ion solutions containing , wastewater treatment.