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Effective Iron-Accumulating Bacteria Isolated from Chemical Laboratory Drainage for Iron Removal

Hasan Hassimi Abu, Jamal Nuradila, Abdullah Siti Rozaimah Sheikh, Abu Bakar Siti Nur Hatika, Muhamad Mohd Hafizuddin, Li Xiangkun

Journal of Ecological Engineering

2021

Vol. 22, nr 2

187--194

Improperly treated heavy metal wastewater discharged into water sources could cause a serious issue for the environment. The aim of this study was to bioaccumulate iron (Fe) using native bacteria isolated from the laboratory drainage water containing a high concentration of iron. The experiment was conducted in 250 mL conical flasks containing 150 mL Fe solution in concentrations of 25, 100, and 250 mg/L, respectively. Approximately 10% of bacteria inoculum was cultivated in each Fe concentration for 24 and 48 hours. The results showed that Pseudomonas hibiscicola was identified as an effective iron-accumulating species of bacteria. The species could remove Fe up to 82% (25 mg/L), 77.8% (100 mg/L) and 32% (250 mg/L). This promising result indicates that the native bacteria isolated from the environment pose a great potential for the remediation of wastewater containing iron.