Efficiency, mechanism and microbial community of Cd(II) removal by mixed bacteria enriched from heavy metals mine soil

Tao tao ZENG; Xiao ling ZHANG; Hai du NONG; Qing HU; Liang qin WANG; Ai jie WANG

doi:10.1016/S1003-6326(22)66028-X

Efficiency, mechanism and microbial community of Cd(II) removal by mixed bacteria enriched from heavy metals mine soil

Tao tao ZENG^*
, Xiao ling ZHANG
, Hai du NONG
, Qing HU
, Liang qin WANG
, Ai jie WANG^*

^*Corresponding author for this work

University of South China
Chinese Academy of Sciences

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Mixed bacteria were enriched from heavy metals mine soil for cadmium (Cd(II))-containing wastewater treatment. Batch adsorption experiment results showed that the optimal pH, temperature, initial Cd(II) concentration, and biomass dosage were 6.0, 30 °C, 20 mg/L, and 1 g/L, respectively. Living biomass exhibited better Cd(II) removal efficiency (91.97%) than autoclaved biomass (79.54%) under optimal conditions. The isotherms and kinetics of living biomass conformed to the Langmuir isotherm model and pseudo-first-order kinetic model, respectively. FTIR results implied that amine groups, hydroxyl groups and phosphoric acid play an important role in the Cd(II) adsorption process, while XRD results showed that crystalline Cd(OH)₂ and CdO were obtained. After Cd(II)-containing wastewater treatment exposure, the dominant bacteria genera included Comamonas (39.94%), unclassified_f__Enterobacteriaceae (34.96%), Ochrobactrum (14.07%), Alcaligenes (4.84%), Bordetella (2.07%), Serratia (1.04%), and Bacillus (1.01%). Function prediction showed that the abundance of metabolic genes changed significantly. This study proposes the potential application of mixed bacteria for Cd(II)-containing wastewater treatment.

Original language	English
Pages (from-to)	3404-3419
Number of pages	16
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	32
Issue number	10
DOIs	https://doi.org/10.1016/S1003-6326(22)66028-X
State	Published - Oct 2022
Externally published	Yes

Keywords

Cd(II)
bacterial community
function prediction
wastewater treatment

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10.1016/S1003-6326(22)66028-X

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title = "Efficiency, mechanism and microbial community of Cd(II) removal by mixed bacteria enriched from heavy metals mine soil",

abstract = "Mixed bacteria were enriched from heavy metals mine soil for cadmium (Cd(II))-containing wastewater treatment. Batch adsorption experiment results showed that the optimal pH, temperature, initial Cd(II) concentration, and biomass dosage were 6.0, 30 °C, 20 mg/L, and 1 g/L, respectively. Living biomass exhibited better Cd(II) removal efficiency (91.97\%) than autoclaved biomass (79.54\%) under optimal conditions. The isotherms and kinetics of living biomass conformed to the Langmuir isotherm model and pseudo-first-order kinetic model, respectively. FTIR results implied that amine groups, hydroxyl groups and phosphoric acid play an important role in the Cd(II) adsorption process, while XRD results showed that crystalline Cd(OH)2 and CdO were obtained. After Cd(II)-containing wastewater treatment exposure, the dominant bacteria genera included Comamonas (39.94\%), unclassified\_f\_\_Enterobacteriaceae (34.96\%), Ochrobactrum (14.07\%), Alcaligenes (4.84\%), Bordetella (2.07\%), Serratia (1.04\%), and Bacillus (1.01\%). Function prediction showed that the abundance of metabolic genes changed significantly. This study proposes the potential application of mixed bacteria for Cd(II)-containing wastewater treatment.",

keywords = "Cd(II), bacterial community, function prediction, wastewater treatment",

author = "ZENG, \{Tao tao\} and ZHANG, \{Xiao ling\} and NONG, \{Hai du\} and Qing HU and WANG, \{Liang qin\} and WANG, \{Ai jie\}",

note = "Publisher Copyright: {\textcopyright} 2022 The Nonferrous Metals Society of China",

year = "2022",

month = oct,

doi = "10.1016/S1003-6326(22)66028-X",

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T1 - Efficiency, mechanism and microbial community of Cd(II) removal by mixed bacteria enriched from heavy metals mine soil

AU - ZENG, Tao tao

AU - ZHANG, Xiao ling

AU - NONG, Hai du

AU - HU, Qing

AU - WANG, Liang qin

AU - WANG, Ai jie

PY - 2022/10

Y1 - 2022/10

N2 - Mixed bacteria were enriched from heavy metals mine soil for cadmium (Cd(II))-containing wastewater treatment. Batch adsorption experiment results showed that the optimal pH, temperature, initial Cd(II) concentration, and biomass dosage were 6.0, 30 °C, 20 mg/L, and 1 g/L, respectively. Living biomass exhibited better Cd(II) removal efficiency (91.97%) than autoclaved biomass (79.54%) under optimal conditions. The isotherms and kinetics of living biomass conformed to the Langmuir isotherm model and pseudo-first-order kinetic model, respectively. FTIR results implied that amine groups, hydroxyl groups and phosphoric acid play an important role in the Cd(II) adsorption process, while XRD results showed that crystalline Cd(OH)2 and CdO were obtained. After Cd(II)-containing wastewater treatment exposure, the dominant bacteria genera included Comamonas (39.94%), unclassified_f__Enterobacteriaceae (34.96%), Ochrobactrum (14.07%), Alcaligenes (4.84%), Bordetella (2.07%), Serratia (1.04%), and Bacillus (1.01%). Function prediction showed that the abundance of metabolic genes changed significantly. This study proposes the potential application of mixed bacteria for Cd(II)-containing wastewater treatment.

AB - Mixed bacteria were enriched from heavy metals mine soil for cadmium (Cd(II))-containing wastewater treatment. Batch adsorption experiment results showed that the optimal pH, temperature, initial Cd(II) concentration, and biomass dosage were 6.0, 30 °C, 20 mg/L, and 1 g/L, respectively. Living biomass exhibited better Cd(II) removal efficiency (91.97%) than autoclaved biomass (79.54%) under optimal conditions. The isotherms and kinetics of living biomass conformed to the Langmuir isotherm model and pseudo-first-order kinetic model, respectively. FTIR results implied that amine groups, hydroxyl groups and phosphoric acid play an important role in the Cd(II) adsorption process, while XRD results showed that crystalline Cd(OH)2 and CdO were obtained. After Cd(II)-containing wastewater treatment exposure, the dominant bacteria genera included Comamonas (39.94%), unclassified_f__Enterobacteriaceae (34.96%), Ochrobactrum (14.07%), Alcaligenes (4.84%), Bordetella (2.07%), Serratia (1.04%), and Bacillus (1.01%). Function prediction showed that the abundance of metabolic genes changed significantly. This study proposes the potential application of mixed bacteria for Cd(II)-containing wastewater treatment.

KW - Cd(II)

KW - bacterial community

KW - function prediction

KW - wastewater treatment

UR - https://www.scopus.com/pages/publications/85142418460

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DO - 10.1016/S1003-6326(22)66028-X

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JF - Transactions of Nonferrous Metals Society of China (English Edition)

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ER -

Efficiency, mechanism and microbial community of Cd(II) removal by mixed bacteria enriched from heavy metals mine soil

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