Kinetics of lead ion biosorption from aqueous solution onto lyophilized Aspergillus niveus

Abstract

The biosorption of lead ions (Pb2+) onto lyophilized fungus Aspergillus niveus was investigated in aqueous solutions in a batch system with respect to pH, contact time and initial concentration of the ions at 30 °C. The maximum adsorption capacity of lyophilized A. niveus was found to be 92.6 mg g−1 at pH 5.1 and the biosorption equilibrium was established about in 30 min. The adsorption capacity obtained is one of the highest value among those reported in the literature. The kinetic data were analyzed using the pseudo-first-order kinetic, pseudo-second-order kinetic, and intraparticle diffusion equations. Kinetic parameters, such as rate constants, equilibrium adsorption capacities, and related correlation coefficients for the kinetic models were calculated and discussed. It was found that the adsorption of lead ions onto lyophilized A. niveus biomass fit the pseudo-second-order kinetic model well. The Langmuir and Freundlich isotherm parameters for the lead ion adsorption were applied and the Langmuir model agreed better with the adsorption of lead ions onto lyophilized A. niveus.

Optimization of chromium and tannic acid bioremediation by Aspergillus niveus using Plackett–Burman design and response surface methodology

“…produce spherical mycelia which help in metal accumulation (Prasenjit and Sumathi 2005 ). Karaca et al ( 2010 ) reported that maximum Pb biosorption was occurred at pH 5 by A. niveus.…”

“…Up to best of our knowledge A. niveus is firstly isolated from tannery effluent and there is no report available on A. niveus for chromium removal and tannic acid degradation. However one report on Pb removal is available (Karaca et al 2010 ).…”

A Study on Biosorption Potential of <i>Aspergillus</i> sp. of Tannery Effluent

“…were observed to be the most commonly occurring in the heavy metal contaminated soils as also reported by Ahmad et al [21] and Zafar et al [23]. Several Aspergillus species have been used for heavy metal ion adsorption such as A. niger [24], A. fumigatus [25], A. niveus [26], A. versicolor [27], A. flavus [28], A. terreus [29] and A. cristatus [30] etc. Sen and Ghosh Dastidar [31] have also studied Aspergillus sp.…”

Biosorption of lead by Bacillus licheniformis isolated from E-waste landfill, Hyderabad, Telangana, India.

“…Therefore, there is a requirement of an effective and affordable biological method for the removal of lead from the electronic waste 8 . Now-a-days biosorption technique is receiving attention in the removal of toxic metals from waste 9 as it is non-polluting, highly selective, more efficient and cost effective for treatment of large volumes of wastewaters containing low metalconcentrations 10,11 . Biosorption is the ability of biological materials like bacteria, algae, fungi, yeasts to adsorb heavy metals from waste through uptake 12 .…”