Assessment of By-Product from Botryosphaeria rhodina MAMB-05 as an Effective Biosorbent of Pb(II).

Antonio J Muñoz,Francisco Espínola,Encarnación Ruiz,Eulogio Castro,Aneli M Barbosa-Dekker,Robert F H Dekker

doi:10.3390/molecules24183306

Abstract

In this work, two types of biomass preparations (VMSM and M3) from the filamentous fungus Botryosphaeria rhodina MAMB-05, which were previously used in a process of production of β-glucan, were assessed as biosorbents of lead. The operating conditions, optimized through response surface methodology and experimental design, were shown to be pH 5.29 and a biosorbent dose of 0.23 g/L for the VMSM biomass type; and pH 5.06 and a dose of biosorbent of 0.60 g/L for the M3 biomass type, at a constant temperature of 27 °C. Fourier transform-infrared spectroscopy analyzed the presence of functional groups on the biomass surface. In addition to give an extra value to the by-product biomass, the VMSM-type from B. rhodina MAMB-05 showed an excellent lead biosorption capacity (qm) with a value of 403.4 mg/g for the Langmuir model, comparing favorably with literature results, while the M3 subtype biomass showed a value of 96.05 mg/g.

Highlights

IntroductionIts use in numerous industries causes many natural ecosystems to become contaminated with this toxic metal [1]
Major legislative efforts have been made to address the issue, lead and its compounds remain one of the most environmentally problematic heavy metals
The results obtained in this work demonstrate that the reused biomass from the filamentous fungus, Botryosphaeria rhodina MAMB-05, is an effective biosorbent of Pb(II)

Summary

Introduction

Its use in numerous industries causes many natural ecosystems to become contaminated with this toxic metal [1]. Physico-chemical procedures are currently in general use, for example, ion exchange, chemical precipitation, adsorption, oxidation-reduction processes, and membrane technologies among others. These treatment techniques are costly, but are very effective when the contaminant is present in high concentrations [5]. Lead presents problems when its concentration is low (

Methods

Results

Conclusion