Arsenite biotransformation by Rhodococcus sp.: Characterization, optimization using response surface methodology and mechanistic studies

Kumari, Nisha; Rana, Anu; Jagadevan, Sheeja

doi:10.1016/j.scitotenv.2019.06.077

Cited by 43 publications

(23 citation statements)

References 55 publications

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“…Contamination of water bodies by arsenic causes a severe threat to the environment and human health, even at low concentrations, owing to its toxicity, mutagenicity and carcinogenicity [1][2][3]. In addition to the natural wreathing of arsenic enriched minerals, the anthropogenic activities including mining, industrial processes and agricultural practices, also substantially contribute to the arsenic pollution [4][5][6]. Typically the arsenate, As(V), is the prevalent species of arsenic especially in natural surface waters [7].…”

Section: Introductionmentioning

confidence: 99%

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Superior arsenate adsorption and comprehensive investigation of adsorption mechanism on novel Mn-doped La2O2CO3 composites

Lyu

et al. 2020

Chemical Engineering Journal

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Mn-doped La 2 O 2 CO 3 (MnL) exhibited superior arsenate capture capacity of 555.6 mg/g.• The residual of As(V) was well below the permissive value for drinking water.• Doping with Mn atoms enhanced adsorption sites and reduced adsorption energy.• Surface complex and anion exchange dominated As(V) removal at low As (V)/MnL ratios.• Forming LaAsO 4 precipitates contributed greatly at high As(V)/MnL ratios.

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Section: Introductionmentioning

confidence: 99%

“…Firstly, arsenate removal performance, kinetics and isotherms were evaluated to obtain an optimised composition of Mn for the MnL synthesis. Then, the adsorption performance was investigated under various pH conditions (4.3-9.1) and in the presence of competing anions (such as SO4 …”

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confidence: 99%

Superior arsenate adsorption and comprehensive investigation of adsorption mechanism on novel Mn-doped La2O2CO3 composites

Lyu

et al. 2020

Chemical Engineering Journal

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“…This is effective in the treatment of heavy metals at a low cost. Packed bed column was used with an increased flow rate, decreased breakthrough time, exhaustion time, and the removal efficiency of nearly 99% was achieved [27,33]. Biosorption can also be used for the recovery and recycling of heavy metals.…”

Section: Heavy Metalmentioning

confidence: 99%

Multi-metal resistance and potential of Alcaligenes sp. MMA for the removal of heavy metals

2020

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Pollution of water bodies is increasing because of toxic metals. In view of this, the present study examines the removal efficiency of heavy metals Cu 2+ , Cd 2+ , Cr 6+ , Ni 2+ , and Zn 2+ by a bacterial strain isolated from River Yamuna. Initially, three strains were isolated, and further examined for the maximum tolerance index. Among the three isolates, strain MMA showed the highest tolerance to the heavy metals and was selected. The biochemical characterization and phylogenetic analysis based on 16S rRNA gene sequencing showed that the strain belonged to the genus Alcaligenes. Metal removal by the strain was observed at 20 mg/L in both individual and multi-metal experimental setup. The highest metal removal within 72 h was observed for Cu 2+ (88.45%) followed by Ni 2+ (82.45%), Zn 2+ (69.99%), Cd 2+ (63.04%), and least for Cr 6+ (48.93%). Bacterial biosorption studies were done using SEM-EDX and FT-IR. Along with the metal removal, the heavy metal assessment of the River was also done for the year September 2017-August 2018, representing the post-monsoon, monsoon, and pre-monsoon. Cu 2+ , Cd 2+ , Cr 6+ , and Zn 2+ were detected in the water sample due to the uncontrolled discharge of effluents into the river.

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“…Arsenic (As) is a toxic metalloid present in high concentrations in natural waters due to various hydrogeological, geochemical conditions and anthropogenic processes, causing serious environmental health problems worldwide (Kumari et al, 2019). One of the main problems is the use of As-contaminated water from groundwater or river water for drinking or domestic use (Arroyo-Herrera et al, 2021;Muñoz et al, 2016;Osuna-Martínez et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The inorganic forms of As predominantly exist as trivalent arsenite (As(OH) 3 , As(OH) 4 − , AsO 2 OH 2 − and AsO 3 3− ) and pentavalent arsenate (AsO 4 3− , HAsO 4 2− , H 2 AsO 4 −) in natural waters. Pentavalent species of As, As(V) are stable in oxygen rich aerobic environments, whereas the more soluble and toxic trivalent arsenite, (As(III)) is prevalent in moderately reducing anaerobic environments such as groundwater (Kumari et al, 2019;Prasad et al, 2011). As(III) is 70 times more toxic than methylated species and 10 times more toxic than As(V), which is poorly soluble in water and therefore less bioavailable.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Molecular identification of native As-resistant bacteria: As(III) and As(V) removal capacity and possible mechanism of detoxification

Rodriguez-Castrejón

Serafín-Muñoz

Álvarez-Vargas

et al. 2021

Preprint

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The study of arsenic resistant microorganisms with high arsenic removal capacity is fundamental for the development of economically sustainable technologies for the treatment of water contaminated with this metalloid. In this work, the isolation and identification of 4 native strains was carried out.: Rhodococcus gordoniae, Microbacterium hydrocarbonoxydans, Exiguobacterium indicum and Pseudomonas kribbensis . R.gordoniae was identified as the bacterium with the highest growth capacity in both As(III) and As(V). E.indicum removed about 74.8% of Arsenate, As(V), and 61.7% of Arsenite , As(III), while R.gordoniae removed about 81.6 % of As(III), and 77.2% of As(V), while that M.hydrocarbonoxydans was able to remove up to 79.9% of As(III) and 68.9% of As(V). Finally, it was observed that P. kribbensis removed about 80.2% of As(V). This study also contributes to the possible detoxification mechanisms employed by these bacteria, the knowledge of which could be crucial in the successful implementation of in situ bioremediation programs.

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Arsenite biotransformation by Rhodococcus sp.: Characterization, optimization using response surface methodology and mechanistic studies

Cited by 43 publications

References 55 publications

Superior arsenate adsorption and comprehensive investigation of adsorption mechanism on novel Mn-doped La2O2CO3 composites

Superior arsenate adsorption and comprehensive investigation of adsorption mechanism on novel Mn-doped La2O2CO3 composites

Multi-metal resistance and potential of Alcaligenes sp. MMA for the removal of heavy metals

Isolation and Molecular identification of native As-resistant bacteria: As(III) and As(V) removal capacity and possible mechanism of detoxification

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