Adsorption characteristics of cadmium(II) onto functionalized poly(hydroxyethylmethacrylate)-grafted coconut coir pith.
This study explored the feasibility of utilizing a novel adsorbent, poly(hydroxyethylmethacrylate)-grafted coconut coir pith with carboxyl functionality (PGCP-COOH) for the removal of cadmium(II) from water and wastewater. Maximum removal of 99.9% was observed for an initial concentration of 25 mg/L at pH 6.0 and adsorbent dose of 2.0 g/L. The first-order reversible kinetic model and Langmuir isotherm model were resulted in high correlation coefficients and described well the adsorption of Cd(II) onto PGCP-COOH. The complete removal of 22.4 mg/L Cd(II) from fertilizer industry wastewater was achieved by 2.0 g/L PGCP-COOH. The reusability of the PGCP-COOH for several cycles was demonstrated using 0.1 M HCl solution.
Anirudhan
Thayyath Sreenivasan
TS
Department of Chemistry, University of Kerala, Kariavattom, Trivandrum, Kerala 695 581, India. tsani@rediffmail.com
Divya
Lekshmi
L
Rijith
Sreenivasan
S
D000327:Adsorption; D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification*; D002413:Cations, Divalent; D003059:Cocos / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007194:India; D007700:Kinetics; D008031:Lignin / Q000031:analogs & derivatives* / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D002413:Cations, Divalent; D008689:Methacrylates; D012997:Solvents; D014874:Water Pollutants, Chemical; C507903:coir; D002104:Cadmium; C005044:hydroxyethyl methacrylate; D008031:Lignin