Pollution Research Paper

Vol 40, Issue 2, 2021; Page No.(493-496 )

BIO REMOVAL OF ARSENIC METALS FROM WATER SOLUTION BY BACILLUS SUBTILIS SP.

HAZIM A. WALLI AND NOOR ALI MOHAMMED

Abstract

The main routes of exposure to arsenic are drinking water, eating food, absorbing the skin and breathing the air. This exposure causes a range of human health problems. Bioremediation is an effective and environmentally friendly method. B. subtilis was isolated from different agricultural soils that were identified based on molecular diagnosis. The biological treatment process was carried out using B. subtilis bacteria and arsenic at concentration of (0.5, 0.2, 0.1 mg/ml) under pH = 7 conditions at 35 °C and for a period (24, 48, 72 hours), and an atomic absorption spectroscopy was used to analyze the concentration of arsenic after the completion of the treatment process. The results showed that the highest removal of arsenic was 86% at 0.1 mg/ml and the lowest removal by 56% at 0.5 mg/ml, and the best elimination period was at 24 hours.