مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

Anew, local agro-industrial wastewas valorized bychemical treatment and tested for its ability to remove cationic dye from aqueous solution. Tendu (Diospyros me/anoxy/on) leaves refuse, a solid waste from bidi industry which caused disposal problem, was studied as a biosorbent. Rawtendu waste(TLR), along with sulfuricacid carbonizedtendu waste(TLR-CM)and tendu waste treated with dilute sulfuric acid (TLR-2N) were utilized as sorbent for uptake of crystal violet from aqueous solutions. Adsorption studies were carried out at various dye concentrations and contact times. It followed the pseudo-second-order kinetics and followed the Langmuir adsorption isotherm. Interestingly, milder acid treatment ofthe tendu waste enhanced biosorption, whereas drastic acid carbonization of tendu waste resulted in reduced adsorption of dye. The maximum adsorption capacities forcrystal violetforTLR-2N, TLRand TLR-CMare 67.57,42.92and 22.47mg/grespectively Commercial activated carbon had maximum adsorption capacity for crystal violet of IS1.52 mg/g. Thus a renewable solid waste with mild acid treatment can offer a cost effective alternative to activated carbon.