Biosorption of Cr(III) from aqueous solution using algal biomass spirogyra spp

In the present investigation, a fresh water green algae spirogyra spp. was used as an inexpensive and efficient biosorbent for Cr(III) removal from aqueous solution. The algal biomass was treated with 0.1 M NaOH, 0.2 M CaCl 2 and 5% HCHO. The biosorption efficiency was compared with untreated biomas...

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Bibliographic Details
Published in:Journal of hazardous materials 2007-06, Vol.145 (1), p.142-147
Main Authors: Bishnoi, Narsi R., Kumar, Rajender, Kumar, Sunil, Rani, Suman
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Biological and medical sciences
Biomass
Biosorption
Biotechnology
Chemical engineering
Chlorides - analysis
Chlorophyta - chemistry
Chromium Compounds - analysis
Chromium(III)
Exact sciences and technology
Freshwater
Fundamental and applied biological sciences. Psychology
Hydrogen-Ion Concentration
Isotherms
Methods. Procedures. Technologies
Models, Chemical
Others
Pollution
Pretreatments
Solutions
Spirogyra
Spirogyra spp
Various methods and equipments
Water Pollutants, Chemical - analysis
Water Purification - methods
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Summary:In the present investigation, a fresh water green algae spirogyra spp. was used as an inexpensive and efficient biosorbent for Cr(III) removal from aqueous solution. The algal biomass was treated with 0.1 M NaOH, 0.2 M CaCl 2 and 5% HCHO. The biosorption efficiency was compared with untreated biomass. The effects of various physico-chemical parameters were studied, e.g. pH 3.0–6.0, initial metal ions concentration 20–150 mg L −1, algal dose 1.0–3.0 g L −1, and contact time 15–180 min, respectively. Biosorption of Cr(III) is highly pH dependent. Maximum 81.02% adsorption of Cr(III) was observed with 0.2 M CaCl 2 treated biomass at pH 5.0. Removal of Cr(III) was more than 70% in 45 min of contact time with different treated and untreated algal biomass at concentration 30 mg L −1. Maximum metal uptake ( Q max) was observed as 30.21 mg g −1 with 0.2 M CaCl 2 treated algal biomass indicate good biosorbents than other treated and untreated biomass. The high values of correlation coefficient ( r 2 < 0.90) indicate equilibrium data of treated and untreated form of algal biomass well fitted in Freundlich than Langmuir isotherms model equations.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2006.10.093