Malaysian Journal of Analytical Sciences Vol 25 No 1 (2021): 129 - 137

 

 

 

 

PREPARATION AND CHEMICAL COMPOSITION OF ALKALINE WATER FROM PLANT COMBUSTION ASH

 

(Penyediaan dan Komposisi Kimia Air Beralkali dari Abu Loji Pembakaran)

 

Pairin Pongsa and Napa Tangtreamjitmun*

 

Department of Chemistry, Faculty of Science,

Burapha University, Bangsaen, Chonburi, 20131 Thailand

 

*Corresponding author email address:  napa@buu.ac.th

 

 

Received: 9 December 2020; Accepted: 18 January 2021; Published:  20 February 2021

 

 

Abstract

The alkaline water prepared from burning natural materials into ash and submersing the ash in water was studied. The combustion time and the percentage of ash obtained for each material were different. The major chemical components of the ash were identified by Fourier transform infrared spectroscopy. The main functional groups found were carbonate and hydroxide. The alkaline water which had a pH of 11-12 was filtered and studied for its chemical composition. The alkalinity in terms of hydroxide, carbonate and bicarbonate species was determined by acid titration. The sodium, potassium, calcium and magnesium content were determined by inductively coupled plasma optical emission spectrophotometer. The major cations found were potassium and sodium. The concentrations and pH of the alkaline water that would be obtained after dilution should be suitable for human consumption although further medical testing is required.

 

Keywords:  alkaline water, lye water, ash, alkalinity

 

Abstrak

Air beralkali telah disediakan dari pembakaran bahan semulajadi kepada abu dan kebolehan tenggelan abu di dalam air telah dikaji. Masa pembakaran dan peratus abu yang diperolehi bagi setiap bahan adalah berbeza. Komponen kimia utama bagi abu telah dikenalpasti menggunakan spektroskopi inframerah transformasi Fourier. Kumpulan berfungsi utama yang ditemui adalah karbonat dan hidroksida. Air beralkali yang mempunyai nilai pH 11-12 telah dituras dan dikaji komposisinya. Sifat kealkalian seperti spesis hidroksida, karbonat dan bikarbonat telah ditentukan melalui pentitratan asid. Kandungan sodium, kaliam, kalsium and magnesium telah di analisis menggunakan spektrofotometer sebaran optikal – plasma gandingan aruhan. Kation utama yang dijumpai adalah kalium dan sodium. Kepekatan dan nilai pH air beralkali diperolehi selepas pencairan sesuai bagi penggunaan manusia meskipun ujian perubatan lanjutan masih diperlukan.

 

Kata kunci:  air beralkali, air abu, abu, kealkalian

 

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