Malaysian Journal of Analytical Sciences Vol 18 No 1 (2014): 78 – 84

 

 

 

A STUDY ON ADSORPTION OF CADMIUM BY USING CHEMICALLY MODIFIED SALVINIA

 

(Kajian Penjerapan Kadmium Dengan Menggunakan Salvinia Yang Diubah Suai Secara Kimia)

 

Anies Suhaida Mohd Naspu^1,2*, Mohd Lias Kamal², Zaini Hamzah¹, Sharizal Hasan²

 

¹Faculty of Applied Science,

Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

²Faculty of Applied Science,

Universiti Teknologi MARA, 02600 Arau, Perlis, Malaysia

 

*Corresponding author: anies_suhaida@yahoo.com

 

 

Abstract

Salvinia was collected at the Tasik Melati, Perlis, Malaysia and it was modified using citric acid to increase the performance in removing heavy metals from standard heavy metal solution. Fourier Transform Infrared (FTIR) and Field Emission Scanning Electron Microscope (FESEM) were used to characterize Salvinia before and after chemical modification. Cadmium (Cd²⁺) removal studies were carried out by using modified Salvinia and the effect of various parameters such as contact time, initial heavy metal concentration and biosorbent dosage were studied. The adsorption study was investigated by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to determine the removing of heavy metal concentration from the standard Cd²⁺ solution. From the study, FTIR analysis was shown the increasing of intensity on hydroxyl group after modification. A clear and smooth surface morphology of Salvinia after treatment were observed by using FESEM. The adsorption of cadmium was increased as contact time and biosorbent dosage increased. In contrast, the percent of adsorption was slightly decreased when initial concentration of Cd²⁺ increased.

 

Keywords: Salvinia, biosorbent, citric acid, cadmium and adsorption

 

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