title: Preparation and characterization of irradiated carboxymethyl sago starch-acid hydrogel and its application as metal scavenger in aqueous solution.
abstract: Carboxymethyl sago starch-acid hydrogel was prepared via irradiation technique to remove divalent metal ions (Pb, Cu and Cd) from their aqueous solution. The hydrogel was characterized by using Fourier Transform Infrared (FT-IR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The removal of these metal ions was analyzed by using inductively coupled plasma-optic emission spectra (ICP-OES) to study the amount of metal uptake by the hydrogel. Parameters of study include effect of pH, amount of sample, contact time, initial concentration of metal solution and reaction temperature. FTIR spectroscopy shows the CMSS hydrogel absorption peaks at 1741cm(-1), 1605cm(-1) and 1430cm(-1) which indicates the substitution of carboxymethyl group of modified sago starch. The degradation temperature of CMSS hydrogel is higher compared to CMSS due to the crosslinking by electron beam radiation and formed a porous hydrogel. From the data obtained, about 93.5%, 88.4% and 85.5% of Pb, Cu and Cd ions has been respectively removed from their solution under optimum condition.
authors.affiliation: Chemistry Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Electronic address: srinorleha_basri@yahoo.com.
authors.forename: Sri Norleha
authors.initials: SN
authors.lastname: Basri
authors.affiliation: Chemistry Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Electronic address: norhazlin@upm.edu.my.
authors.forename: Norhazlin
authors.initials: N
authors.lastname: Zainuddin
authors.affiliation: Radiation Processing Technology Division, Malaysian Nuclear Agency, 43000 Kajang, Selangor, Malaysia. Electronic address: kbhashim6355@gmail.com.
authors.forename: Kamaruddin
authors.initials: K
authors.lastname: Hashim
authors.affiliation: Chemistry Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia. Electronic address: azahy@upm.edu.my.
authors.forename: Nor Azah
authors.initials: NA
authors.lastname: Yusof
mesh_terms: D000327:Adsorption; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000031:analogs & derivatives*; D013696:Temperature; D013816:Thermodynamics; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry*
chemical_list: D007477:Ions; D008670:Metals; D014867:Water; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D013213:Starch
keywords: Carboxymethyl starch; Electron beam radiation; Isotherm study; Metal scavenger; Sago