Corynebacterium glutamicum MTCC 2745 immobilized on granular activated carbon/MnFe2O4 composite: A novel biosorbent for removal of As(III) and As(V) ions.
The optimization of biosorption/bioaccumulation process of both As(III) and As(V) has been investigated by using the biosorbent; biofilm of Corynebacterium glutamicum MTCC 2745 supported on granular activated carbon/MnFe2O4 composite (MGAC). The presence of functional groups on the cell wall surface of the biomass that may interact with the metal ions was proved by FT-IR. To determine the most appropriate correlation for the equilibrium curves employing the procedure of the non-linear regression for curve fitting analysis, isotherm studies were performed for As(III) and As(V) using 30 isotherm models. The pattern of biosorption/bioaccumulation fitted well with Vieth-Sladek isotherm model for As(III) and Brouers-Sotolongo and Fritz-Schlunder-V isotherm models for As(V). The maximum biosorption/bioaccumulation capacity estimated using Langmuir model were 2584.668mg/g for As(III) and 2651.675mg/g for As(V) at 30°C temperature and 220min contact time. The results showed that As(III) and As(V) removal was strongly pH-dependent with an optimum pH value of 7.0. D-R isotherm studies specified that ion exchange might play a prominent role.
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India. Electronic address: mou.chem11@gmail.com.
M S
MS
Podder
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India. Electronic address: cbmajumder@gmail.com.
C B
CB
Majumder
D000327:Adsorption; D001151:Arsenic / Q000302:isolation & purification*; D018914:Cells, Immobilized / Q000737:chemistry / Q000166:cytology; D002606:Charcoal / Q000737:chemistry*; D048230:Corynebacterium glutamicum / Q000737:chemistry* / Q000166:cytology; D005290:Ferric Compounds / Q000737:chemistry*; D007700:Kinetics; D017895:Manganese Compounds / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013816:Thermodynamics; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D001151:Arsenic; D002606:Charcoal; D005290:Ferric Compounds; D017895:Manganese Compounds; D062065:Wastewater; D014874:Water Pollutants, Chemical; C551151:manganese ferrite
As(III) and As(V); C. glutamicum MTCC 2745; Equilibrium isotherm; GAC/MnFe(2)O(4) composite; Simultaneous biosorption and bioaccumulation; Wastewater