Abstract
Abstract This work presented conditions for Cu(II) and Zn(II) removal using native, physically and chemically pretreated Rosa gruss an teplitz (red rose) distillation sludge. Cu(II) and Zn(II) sorption was found dependent on solution pH, biosorbent dose, biosorbent particle size, shaking speed, temperature, initial concentration of metal ions being sorbed and contact time. Physical and chemical pretreatments of biomass resulted in an increase or decrease in metals uptake capacity. The effect of different pretreatments is discussed in detail. Highest Cu(II) and Zn(II) biosorption capacities were observed for PEI + gluteraldehyde (68.64 mg/g) and NaOH (43.4 mg/g) pretreated biomass, respectively. The native biomass showed Cu(II) biosorption capacity that was adequately described by Freundlich isotherm, whereas Zn(II) biosorption phenomenon was described by Langmuir isotherm. The suitability of a pseudo-first-order chemical reaction for sorption of Cu(II) and Zn(II) ions onto this biomass was apparent as this kinetic model described adequately the largest part of the process.
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