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    Removal of Cadmium from Wastewater Using Immobilized <i>Bacillus subtilis</i> with a Biochar&#x2013;Sodium Alginate Composite Carrier

    Source: Journal of Environmental Engineering:;2025:;Volume ( 151 ):;issue: 007::page 04025030-1
    Author:
    Jie Teng
    ,
    Junqiang Wang
    ,
    Fei Dong
    DOI: 10.1061/JOEEDU.EEENG-7994
    Publisher: American Society of Civil Engineers
    Abstract: In order to solve the problems of the long treatment period and easy loss of microorganisms in the biological treatment of wastewater containing Cd(II), immobilized bacteria pellets were prepared by the embedding method with biochar–sodium alginate composite as the carrier and Bacillus subtilis as the target bacteria to achieve efficient removal of Cd(II) in wastewater. Through single-factor and response surface optimization tests, the conditions of treating Cd(II)-containing wastewater by immobilized bacteria pellets were optimized. The results showed that the optimal conditions were as follows: the dosage of immobilized bacteria pellets was 2.02  g/L, the wastewater pH was 6.56, and the Cd(II) initial concentration was 98.7  mg/L. Under these conditions, the ideal removal efficiency of Cd(II) was 91.7%. In addition, the adsorption of Cd(II) by the immobilized pellets conformed to the pseudo-second-order kinetic model and Langmuir equilibrium equation. This study provides a new idea and method for the biological treatment of Cd(II)-containing wastewater.
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      Removal of Cadmium from Wastewater Using Immobilized <i>Bacillus subtilis</i> with a Biochar&#x2013;Sodium Alginate Composite Carrier

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4307797
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    contributor authorJie Teng
    contributor authorJunqiang Wang
    contributor authorFei Dong
    date accessioned2025-08-17T23:01:39Z
    date available2025-08-17T23:01:39Z
    date copyright7/1/2025 12:00:00 AM
    date issued2025
    identifier otherJOEEDU.EEENG-7994.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4307797
    description abstractIn order to solve the problems of the long treatment period and easy loss of microorganisms in the biological treatment of wastewater containing Cd(II), immobilized bacteria pellets were prepared by the embedding method with biochar–sodium alginate composite as the carrier and Bacillus subtilis as the target bacteria to achieve efficient removal of Cd(II) in wastewater. Through single-factor and response surface optimization tests, the conditions of treating Cd(II)-containing wastewater by immobilized bacteria pellets were optimized. The results showed that the optimal conditions were as follows: the dosage of immobilized bacteria pellets was 2.02  g/L, the wastewater pH was 6.56, and the Cd(II) initial concentration was 98.7  mg/L. Under these conditions, the ideal removal efficiency of Cd(II) was 91.7%. In addition, the adsorption of Cd(II) by the immobilized pellets conformed to the pseudo-second-order kinetic model and Langmuir equilibrium equation. This study provides a new idea and method for the biological treatment of Cd(II)-containing wastewater.
    publisherAmerican Society of Civil Engineers
    titleRemoval of Cadmium from Wastewater Using Immobilized Bacillus subtilis with a Biochar–Sodium Alginate Composite Carrier
    typeJournal Article
    journal volume151
    journal issue7
    journal titleJournal of Environmental Engineering
    identifier doi10.1061/JOEEDU.EEENG-7994
    journal fristpage04025030-1
    journal lastpage04025030-10
    page10
    treeJournal of Environmental Engineering:;2025:;Volume ( 151 ):;issue: 007
    contenttypeFulltext
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