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505837 
Journal Article 
Adsorption of nickel from aqueous solution by coir based adsorbent, puresorbe 
Nityanandi, D; Subbhuraam, CV; Kadirvelu, K 
2006 
Yes 
Environmental Technology
ISSN: 0959-3330
EISSN: 1479-487X 
27 
1 
15-24 
English 
The effectiveness of adsorption for nickel removal from wastewater had made it an ideal alternative to other expensive treatment options. This paper deals with an investigation on coir based adsorbent (Puresorbe) in the removal of nickel from the aqueous solutions. The adsorption of nickel was carried out by varying the parameters such as agitation time, metal concentration, adsorbent dose, temperature and pH. The experimental isotherm data were analyzed using the Langmuir and Freundlich isotherms. Adsorption followed a second order rate expression for the particle size 250-500 mu m at pH 6. The monolayer adsorption capacity was 15.31 mg nickel per gram of puresorbe. Thermodynamic parameters show the endothermic nature of nickel adsorption. A desorption study carried out using distilled water adjusted to pH of 2-10, suggests that ion exchange might be the mode of adsorption. 
adsorption isotherm; coir based adsorbent; adsorption kinetics; second; order kinetics; thermodynamic studies; heavy-metals; waste-water; by-products; removal; ions; sorption; peat; biosorption; copper(ii); lead(ii)