Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems

In this study, spent Auricularia auricula substrate (AS)-derived biochar (ASBCs) and activated biochar with NaOH (A-ASBC) were evaluated for the adsorption of cationic azo dyes, including methylene blue (MB), rhodamine B (RB), and crystal violet (CV), from single and binary adsorptive systems. A-ASB...

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Autores principales:	Long Su, Haibo Zhang, Kokyo Oh, Na Liu, Yuan Luo, Hongyan Cheng, Guosheng Zhang, Xiaofang He
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption mechanism antagonistic/competitive effect base-activated biochar dyes pyrolysis temperature spent mushroom substrate Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/06eb707c899047e9acdd2427d9903d27
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spelling	oai:doaj.org-article:06eb707c899047e9acdd2427d9903d272021-11-06T11:11:43ZActivated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems0273-12231996-973210.2166/wst.2021.222https://doaj.org/article/06eb707c899047e9acdd2427d9903d272021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/1/101https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In this study, spent Auricularia auricula substrate (AS)-derived biochar (ASBCs) and activated biochar with NaOH (A-ASBC) were evaluated for the adsorption of cationic azo dyes, including methylene blue (MB), rhodamine B (RB), and crystal violet (CV), from single and binary adsorptive systems. A-ASBC showed a higher maximum adsorption capacity for these dyes (MB: 53.62 mg·g−1, RB: 32.33 mg·g−1, CV: 735.73 mg·g−1) than ASBCs in a single system because it had a greater specific surface area and more oxygen containing-functional groups on the surface. The adsorption process of the three dyes onto the adsorbents was in good agreement with the Freundlich adsorption isotherm and fit the pseudo-second-order kinetic model, which revealed sorbate polymolecular layer formation over the adsorbent surface and the involvement of chemisorption. The adsorption mechanism showed that the adsorption of three dyes on adsorbents could be postulated as a multistep process with extraordinary affinity-induced adsorption in terms of both physisorption and chemisorption. In the binary adsorptive system, the results showed that all MB, RB, and CV had antagonistic/competitive effects on each other's adsorption (QBinary/QSingle < 1). Furthermore, a phytotoxic assay affirmed the effectiveness of the adsorbent in adsorbing dye species from aqueous solutions using Brassica pekinensis L. seeds as the model. Therefore, activated biochar prepared from AS can be used as a potentially economical and effective adsorbent for treating printing and dyeing wastewater. Highlights The biochar adsorbent was prepared from the spent Auricularia auricula substrate.; The physicochemical properties of fungus bran biochar were comprehensively analyzed.; The single and binary adsorption of dyes were compared and the reasons were analyzed.; Phytotoxicity test was carried out to confirm the effectiveness of adsorption.; The adsorption mechanism is explained in detail, which provides a theoretical basis.;Long SuHaibo ZhangKokyo OhNa LiuYuan LuoHongyan ChengGuosheng ZhangXiaofang HeIWA Publishingarticleadsorption mechanismantagonistic/competitive effectbase-activated biochardyespyrolysis temperaturespent mushroom substrateEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 1, Pp 101-121 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption mechanism antagonistic/competitive effect base-activated biochar dyes pyrolysis temperature spent mushroom substrate Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption mechanism antagonistic/competitive effect base-activated biochar dyes pyrolysis temperature spent mushroom substrate Environmental technology. Sanitary engineering TD1-1066 Long Su Haibo Zhang Kokyo Oh Na Liu Yuan Luo Hongyan Cheng Guosheng Zhang Xiaofang He Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
description	In this study, spent Auricularia auricula substrate (AS)-derived biochar (ASBCs) and activated biochar with NaOH (A-ASBC) were evaluated for the adsorption of cationic azo dyes, including methylene blue (MB), rhodamine B (RB), and crystal violet (CV), from single and binary adsorptive systems. A-ASBC showed a higher maximum adsorption capacity for these dyes (MB: 53.62 mg·g−1, RB: 32.33 mg·g−1, CV: 735.73 mg·g−1) than ASBCs in a single system because it had a greater specific surface area and more oxygen containing-functional groups on the surface. The adsorption process of the three dyes onto the adsorbents was in good agreement with the Freundlich adsorption isotherm and fit the pseudo-second-order kinetic model, which revealed sorbate polymolecular layer formation over the adsorbent surface and the involvement of chemisorption. The adsorption mechanism showed that the adsorption of three dyes on adsorbents could be postulated as a multistep process with extraordinary affinity-induced adsorption in terms of both physisorption and chemisorption. In the binary adsorptive system, the results showed that all MB, RB, and CV had antagonistic/competitive effects on each other's adsorption (QBinary/QSingle < 1). Furthermore, a phytotoxic assay affirmed the effectiveness of the adsorbent in adsorbing dye species from aqueous solutions using Brassica pekinensis L. seeds as the model. Therefore, activated biochar prepared from AS can be used as a potentially economical and effective adsorbent for treating printing and dyeing wastewater. Highlights The biochar adsorbent was prepared from the spent Auricularia auricula substrate.; The physicochemical properties of fungus bran biochar were comprehensively analyzed.; The single and binary adsorption of dyes were compared and the reasons were analyzed.; Phytotoxicity test was carried out to confirm the effectiveness of adsorption.; The adsorption mechanism is explained in detail, which provides a theoretical basis.;
format	article
author	Long Su Haibo Zhang Kokyo Oh Na Liu Yuan Luo Hongyan Cheng Guosheng Zhang Xiaofang He
author_facet	Long Su Haibo Zhang Kokyo Oh Na Liu Yuan Luo Hongyan Cheng Guosheng Zhang Xiaofang He
author_sort	Long Su
title	Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
title_short	Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
title_full	Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
title_fullStr	Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
title_full_unstemmed	Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
title_sort	activated biochar derived from spent auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/06eb707c899047e9acdd2427d9903d27
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Activated biochar derived from spent Auricularia auricula substrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems

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