Batch experiments towards remediation of phenolic syntan using individual as well as co-culture of Bacillus cereus and Pseudomonas aeruginosa

Venugopal, Sivaranjani; Irudayarajan, Lawrance; Khambhaty, Yasmin; Palanivel, Saravanan

doi:10.1007/s11274-019-2683-0

Cited by 6 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These compounds are usually found in mine tailings [5]. All five genera have previously been reported to be resistant to several heavy metals, such as chromium, nickel, zinc, copper, lead, cadmium, cobalt and mercury [36,37,[46][47][48][49][50][51][52]. This characteristic renders them potentially suitable for the biotreatment of gold mine tailings.…”

Section: Discussionmentioning

confidence: 99%

Cyanide Biodegradation by a Native Bacterial Consortium and Its Potential for Goldmine Tailing Biotreatment

Alvarado-Lopez

Garrido-Hoyos

Raynal-Gutierrez

et al. 2023

Water

View full text Add to dashboard Cite

A native cyanide-degrading bacterial consortium was isolated from goldmine tailing sediments. Mine tailings are toxic effluents due to their metal–cyanide complexes. The bacterial consortium was able to degrade an initial sodium cyanide concentration ranging from 5 to 120 mg L−1 in alkaline synthetic wastewater (pH > 9.2), for a maximum of 15 days. The free cyanide biodegradation efficiency was 98% for the highest initial free cyanide concentration tested and followed a first-order kinetic profile, with an estimated kinetic rate constant of 0.12 ± 0.011 d−1. The cyanide-degrading consortium was streaked with serial dilutions on a specific medium (R2A). 16S rRNA gene sequencing and mass spectrometry proteomic fingerprinting of the isolates showed that the bacterial strains belonged to Microbacterium paraoxydans, Brevibacterium casei, Brevundimonas vesicularis, Bacillus cereus and Cellulosimicrobium sp. The first four genera had previously been identified as cyanide-degrading bacteria. Microbacterium and Brevibacterium had previously been found in alkaline conditions, showing resistance to heavy metals. As for Cellulosimicrobium, to our knowledge, this is the first study to implicate it directly or indirectly in cyanide biodegradation. In this research, these genera were identified as functional bacteria for cyanide degradation, and they might be suitable for mine tailing biotechnological tertiary treatment.

show abstract