Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis

Shortcomings of individual biochar or microbial technologies often exist in heavy metal removal from wastewater and may be circumvented by coupled use of biochar and microorganisms. In this study, Bacillus subtilis and each of three biochars of different origins (corn stalk, peanut shell, and pine w...

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Autores principales:	Jing Ding, Weiguang Chen, Zilan Zhang, Fan Qin, Jing Jiang, Anfei He, G. Daniel Sheng
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	bacillus subtilis biochar cadmium removal composite system wastewater Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/f3784a5c7cba4213a260b68c43c756b5
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spelling	oai:doaj.org-article:f3784a5c7cba4213a260b68c43c756b52021-11-06T11:01:29ZEnhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis0273-12231996-973210.2166/wst.2021.138https://doaj.org/article/f3784a5c7cba4213a260b68c43c756b52021-05-01T00:00:00Zhttp://wst.iwaponline.com/content/83/9/2075https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Shortcomings of individual biochar or microbial technologies often exist in heavy metal removal from wastewater and may be circumvented by coupled use of biochar and microorganisms. In this study, Bacillus subtilis and each of three biochars of different origins (corn stalk, peanut shell, and pine wood) were coupled forming composite systems to treat a cadmium (Cd, 50 mg/L) wastewater formulated with CdCl2 in batch tests. Biochar in composite system enhanced the activity and Cd adsorption of B. subtilis. Compared with single systems with Cd removal up to 33%, the composite system with corn stalk biochar showed up to 62% Cd removal, which was greater than the sum of respective single B. subtilis and biochar systems. Further analysis showed that the removal of Cd by the corn stalk composite system could be considered to consist of three successive stages, that is, the biochar-dominant adsorption stage, the B. subtilis-dominant adsorption stage, and the final biofilm formation stage. The final stage may have provided the composite system with the ability to achieve prolonged steady removal of Cd. The biochar-microorganism composite system shows a promising application for heavy metal wastewater treatment. HIGHLIGHTS Biochar enhanced the activity and cadmium adsorption of Bacillus subtilis.; Corn stalk composite system had higher cadmium removal efficiency than peanut shell and pine wood composite systems.; Cadmiun removal in corn stalk composite system was higher than the sum of the single biochar and Bacillus subtilis systems.; Cadmium removal in corn stalk composite system could be divided into three stages.;Jing DingWeiguang ChenZilan ZhangFan QinJing JiangAnfei HeG. Daniel ShengIWA Publishingarticlebacillus subtilisbiocharcadmium removalcomposite systemwastewaterEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 9, Pp 2075-2086 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bacillus subtilis biochar cadmium removal composite system wastewater Environmental technology. Sanitary engineering TD1-1066
spellingShingle	bacillus subtilis biochar cadmium removal composite system wastewater Environmental technology. Sanitary engineering TD1-1066 Jing Ding Weiguang Chen Zilan Zhang Fan Qin Jing Jiang Anfei He G. Daniel Sheng Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis
description	Shortcomings of individual biochar or microbial technologies often exist in heavy metal removal from wastewater and may be circumvented by coupled use of biochar and microorganisms. In this study, Bacillus subtilis and each of three biochars of different origins (corn stalk, peanut shell, and pine wood) were coupled forming composite systems to treat a cadmium (Cd, 50 mg/L) wastewater formulated with CdCl2 in batch tests. Biochar in composite system enhanced the activity and Cd adsorption of B. subtilis. Compared with single systems with Cd removal up to 33%, the composite system with corn stalk biochar showed up to 62% Cd removal, which was greater than the sum of respective single B. subtilis and biochar systems. Further analysis showed that the removal of Cd by the corn stalk composite system could be considered to consist of three successive stages, that is, the biochar-dominant adsorption stage, the B. subtilis-dominant adsorption stage, and the final biofilm formation stage. The final stage may have provided the composite system with the ability to achieve prolonged steady removal of Cd. The biochar-microorganism composite system shows a promising application for heavy metal wastewater treatment. HIGHLIGHTS Biochar enhanced the activity and cadmium adsorption of Bacillus subtilis.; Corn stalk composite system had higher cadmium removal efficiency than peanut shell and pine wood composite systems.; Cadmiun removal in corn stalk composite system was higher than the sum of the single biochar and Bacillus subtilis systems.; Cadmium removal in corn stalk composite system could be divided into three stages.;
format	article
author	Jing Ding Weiguang Chen Zilan Zhang Fan Qin Jing Jiang Anfei He G. Daniel Sheng
author_facet	Jing Ding Weiguang Chen Zilan Zhang Fan Qin Jing Jiang Anfei He G. Daniel Sheng
author_sort	Jing Ding
title	Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis
title_short	Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis
title_full	Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis
title_fullStr	Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis
title_full_unstemmed	Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis
title_sort	enhanced removal of cadmium from wastewater with coupled biochar and bacillus subtilis
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/f3784a5c7cba4213a260b68c43c756b5
work_keys_str_mv	AT jingding enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis AT weiguangchen enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis AT zilanzhang enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis AT fanqin enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis AT jingjiang enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis AT anfeihe enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis AT gdanielsheng enhancedremovalofcadmiumfromwastewaterwithcoupledbiocharandbacillussubtilis
_version_	1718443770128629760

Enhanced removal of cadmium from wastewater with coupled biochar and Bacillus subtilis

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