Bromine pretreated chitosan for adsorption of lead (II) from water

Bulletin of materials science

Jostna Meshram²  Rajendra Dongre²  Minakshi Thakur¹  Dinesh Ghugal² 

[1] Department of Biotechnology, Madhav Institute of Technology and Science, Gwalior 474 005, India$$Department of Biotechnology, Madhav Institute of Technology and Science, Gwalior 474 005, IndiaDepartment of Biotechnology, Madhav Institute of Technology and Science, Gwalior 474 005, India$$;P. G.T.D. of Chemistry, R. T. M. Nagpur University, Nagpur 440 033, India$$P. G.T.D. of Chemistry, R. T. M. Nagpur University, Nagpur 440 033, IndiaP. G.T.D. of Chemistry, R. T. M. Nagpur University, Nagpur 440 033, India$$

关键词: Lead;    30% bromine pretreated chitosan;    water;    adsorption;    langmuir;    Freundlich.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Pollution by heavy metals like lead (II) is responsible for health hazards and environmental degradation. Adsorption is a prevalent method applied for removal of heavy metal pollutants from water. This study explored adsorption performances of 30% bromine pretreated chitosan for lead (II) abatement from water. Bromine pretreatment alters porosity and specific surface area of chitosan by means of physicochemical interaction with cationic sites of chitosan skeleton, besides imparting anionic alteration at amino linkages of chitosan, to remove lead (II) by chemical interactions on superfluous active sites as characterized by FTIR, SEM, DTA and elemental analysis. Lead adsorptions were studied in batch mode by varying parameters viz. pH, bromine loading, sorbent dosage, initial lead concentration, contact time and temperature. The adsorption equilibrium data was well fitted to Freundlich isotherm and maximum sorption capacity of 30% bromine pretreated chitosan sorbent was 1.755 g/kg with 85�??90% lead removal efficiency. Though cost and applicability of sorbent is unproven, yet contrast to raw chitosan derivatives, activated carbons and some resins, 30% bromine pretreated chitosan endow benign and efficient lead abatement technique.

【 授权许可】

Unknown