Malaysian Journal of Analytical Sciences Vol 21 No 2 (2017): 512 - 517

DOI: https://doi.org/10.17576/mjas-2017-2102-26

 

 

 

CHARACTERIZATION OF SODIUM SILICATE DERIVED FROM SUGARCANE BAGASSE ASH

 

(Pencirian Natrium Silikat yang Dihasilkan daripada Abu Hampas Tebu)

 

Norsuraya Sahiron, Norhasyimi Rahmat, Fazlena Hamzah*

 

Faculty of Chemical Engineering

Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

 

*Corresponding author: fazlena@salam.uitm.edu.my

 

 

Received: 21 October 2015; Accepted: 14 June 2016

 

 

Abstract

This study explores the potential of sugarcane bagasse ash (SCBA) as a precursor in the extraction of sodium silicate. SCBA was obtained from sugarcane bagasse, residual waste from sugar industries. In the present study, sugarcane bagasse (SCB) was burnt with different temperatures 600 ^°C, 800 ^°C and 1000 ^°C for 2 hours and 4 hours and then the ash washed using hydrochloric acid (HCl) to remove metallic ions and impurities. The ash was characterized using X-ray Fluorescence (XRF). The result indicated that SCBA at 1000 ^°C for 4 hours using acid washing method gave the highest composition of silica which is 88.13%. Then, the ash with the highest silica composition was extracted using 3M of sodium hydroxide (NaOH) solution. During the process NaOH will bind with silicate to form sodium silicate (Na₂SiO₂) and water (H₂O). The formation of sodium silicate was characterized and compare with commercial sodium silicate using Fourier Transform Infrared Spectroscopy.

 

Keywords:  sodium silicate, sugarcane bagasse ash, waste renewable

 

Abstrak

Kajian ini meneroka potensi abu hampas tebu (SCBA) sebagai pelopor dalam pengekstrakan natrium silikat. Abu hampas tebu ini telah diperolehi daripada industri gula. Dalam kajian ini, hampas tebu (SCB) dibakar dengan suhu yang berbeza iaitu pada suhu 600 ^°C, 800 ^°C dan 1000 ^°C selama 2 jam dan 4 jam dan kemudian abu dicampur dengan asid hidroklorik (HCl) dan ditapis untuk mengeluarkan ion logam dan kekotoran. Abu di analisis menggunakan pendarfluor Sinar-X (XRF). Hasilnya menunjukkan bahawa abu hampas tebu (SCBA) pada 1000 °C selama 4 jam dengan menggunakan kaedah basuhan asid memberikan komposisi silika tertinggi iaitu 88.13%. Kemudian, abu dengan komposisi silika yang paling tinggi akan diekstrak menggunakan 3M natrium hidroksida (NaOH). Semasa proses, NaOH akan bergabung dengan silikat untuk membentuk natrium silikat (Na₂SiO₂) dan air (H₂O). Pembentukan natrium silika dianalisis dan bandingkan dengan silika natrium yang digunakan dipasaran menggunakan Spektroskopi Inframerah Transformasi Fourier.

 

Kata kunci:  natrium silikat, hampas tebu, sisa diperbaharui

 

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