Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Volume 18, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/ijerph18052424
Keywords
azo dyes; Reactive Red 120; decolourisation; phytotoxicity; optimisation; RSM
Funding
- Fundamental Research Grant Scheme (FRGS) [FRGS/1/2019/STG05/UPM/02/7]
- Ministry of Higher Education, Malaysia
Ask authors/readers for more resources
This study investigated the role of methods and media in obtaining a bacterial consortium capable of decolourising azo dye as the sole carbon source, and successfully isolated a novel consortium JR3 with a high decolourisation rate. Optimisation processes further enhanced the decolourisation efficiency, resulting in maximal decolourisation of 92.79%.
The application of microorganisms in azo dye remediation has gained significant attention, leading to various published studies reporting different methods for obtaining the best dye decolouriser. This paper investigates and compares the role of methods and media used in obtaining a bacterial consortium capable of decolourising azo dye as the sole carbon source, which is extremely rare to find. It was demonstrated that a prolonged acclimation under low substrate availability successfully isolated a novel consortium capable of utilising Reactive Red 120 dye as a sole carbon source in aerobic conditions. This consortium, known as JR3, consists of Pseudomonas aeruginosa strain MM01, Enterobacter sp. strain MM05 and Serratia marcescens strain MM06. Decolourised metabolites of consortium JR3 showed an improvement in mung bean's seed germination and shoot and root length. One-factor-at-time optimisation characterisation showed maximal of 82.9% decolourisation at 0.7 g/L ammonium sulphate, pH 8, 35 degrees C, and RR120 concentrations of 200 ppm. Decolourisation modelling utilising response surface methodology (RSM) successfully improved decolourisation even more. RSM resulted in maximal decolourisation of 92.79% using 0.645 g/L ammonium sulphate, pH 8.29, 34.5 degrees C and 200 ppm RR120.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available