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Manganese-contaminated groundwater treatment by novel bacterial isolates: kinetic study and mechanism analysis using synchrotron-based techniques
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Manganese-contaminated groundwater treatment by novel bacterial isolates: kinetic study and mechanism analysis using synchrotron-based techniques
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Journal Article
Manganese-contaminated groundwater treatment by novel bacterial isolates: kinetic study and mechanism analysis using synchrotron-based techniques
2020
Overview
The occurrence of manganese in groundwater causes coloured water and pipe rusting in water treatment systems. Consumption of manganese-contaminated water promotes neurotoxicity in humans and animals. Manganese-oxidizing bacteria were isolated from contaminated areas in Thailand for removing manganese from water. The selected bacterium was investigated for its removal kinetics and mechanism using synchrotron-based techniques. Among 21 isolates,
Streptomyces violarus
strain SBP1 (SBP1) was the best manganese-oxidizing bacterium. At a manganese concentration of 1 mg L
−1
, SBP1 achieved up to 46% removal. The isolate also successfully removed other metal and metalloid, such as iron (81%) and arsenic (38%). The manganese concentration played a role in manganese removal and bacterial growth. The observed self-substrate inhibition best fit with the Aiba model. Kinetic parameters estimated from the model, including a specific growth rate, half-velocity constant, and inhibitory constant, were 0.095 h
−1
, 0.453 mg L
−1
, and 37.975 mg L
−1
, respectively. The synchrotron-based techniques indicated that SBP1 removed manganese via combination of bio-oxidation (80%) and adsorption (20%). The study is the first report on biological manganese removal mechanism using synchrotron-based techniques. SBP1 effectively removed manganese under board range of manganese concentrations. This result showed the potential use of the isolate for treating manganese-contaminated water.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Arsenic
/ Bacteria
/ Chryseobacterium - isolation & purification
/ Chryseobacterium - metabolism
/ Humanities and Social Sciences
/ Kinetics
/ Manganese Compounds - isolation & purification
/ Manganese Compounds - metabolism
/ Science
/ Streptomyces - isolation & purification
/ Thailand
/ Water Pollutants, Chemical - isolation & purification
/ Water Pollutants, Chemical - metabolism
/ Water Pollution, Chemical - analysis
/ Water Pollution, Chemical - prevention & control
