Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter

Abstract The effects of humic acid (HA) and fulvic acid (FA) on Cu2+ adsorption on biochar were investigated, with mechanisms confirmed by excitation-emission matrix spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. HA loading enhanced Cu2+ adsorption on biocha...

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Autores principales:	Pinjing He, Qinfang Yu, Hua Zhang, Liming Shao, Fan Lü
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/905b39268e0b4737a10d475754f15217
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spelling	oai:doaj.org-article:905b39268e0b4737a10d475754f152172021-12-02T16:07:45ZRemoval of Copper (II) by Biochar Mediated by Dissolved Organic Matter10.1038/s41598-017-07507-y2045-2322https://doaj.org/article/905b39268e0b4737a10d475754f152172017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07507-yhttps://doaj.org/toc/2045-2322Abstract The effects of humic acid (HA) and fulvic acid (FA) on Cu2+ adsorption on biochar were investigated, with mechanisms confirmed by excitation-emission matrix spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. HA loading enhanced Cu2+ adsorption on biochar, with the maximum enhancement of 55.0% occurring at an HA loading of 100 mg-C/L. The adsorbed HA introduced many additional functional groups to biochar, thus enhancing Cu2+ adsorption, which decreased at HA concentrations >100 mg-C/L due to self-association of HA at high loading concentrations. In contrast, FA loading caused no enhancement on Cu2+ adsorption on biochar. FA was adsorbed through H-bonding with the functional groups of biochar, which set up a competition with Cu2+ for adsorption on biochar. The functional groups occupied by adsorbed FA were offset by the newly introduced functional groups of FA, thus there was no net increase in the amount of Cu2+ adsorption upon FA loading. These findings imply that, because of the enhanced adsorption of HA-loaded biochar, the amount of Cu2+ immobilized would increase by 28.2% for mature compost and 31.9% for fresh compost if there exist interaction between biochar and HA compared with the amounts immobilized by non-interactive HA and biochar.Pinjing HeQinfang YuHua ZhangLiming ShaoFan LüNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Pinjing He Qinfang Yu Hua Zhang Liming Shao Fan Lü Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter
description	Abstract The effects of humic acid (HA) and fulvic acid (FA) on Cu2+ adsorption on biochar were investigated, with mechanisms confirmed by excitation-emission matrix spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. HA loading enhanced Cu2+ adsorption on biochar, with the maximum enhancement of 55.0% occurring at an HA loading of 100 mg-C/L. The adsorbed HA introduced many additional functional groups to biochar, thus enhancing Cu2+ adsorption, which decreased at HA concentrations >100 mg-C/L due to self-association of HA at high loading concentrations. In contrast, FA loading caused no enhancement on Cu2+ adsorption on biochar. FA was adsorbed through H-bonding with the functional groups of biochar, which set up a competition with Cu2+ for adsorption on biochar. The functional groups occupied by adsorbed FA were offset by the newly introduced functional groups of FA, thus there was no net increase in the amount of Cu2+ adsorption upon FA loading. These findings imply that, because of the enhanced adsorption of HA-loaded biochar, the amount of Cu2+ immobilized would increase by 28.2% for mature compost and 31.9% for fresh compost if there exist interaction between biochar and HA compared with the amounts immobilized by non-interactive HA and biochar.
format	article
author	Pinjing He Qinfang Yu Hua Zhang Liming Shao Fan Lü
author_facet	Pinjing He Qinfang Yu Hua Zhang Liming Shao Fan Lü
author_sort	Pinjing He
title	Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter
title_short	Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter
title_full	Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter
title_fullStr	Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter
title_full_unstemmed	Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter
title_sort	removal of copper (ii) by biochar mediated by dissolved organic matter
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/905b39268e0b4737a10d475754f15217
work_keys_str_mv	AT pinjinghe removalofcopperiibybiocharmediatedbydissolvedorganicmatter AT qinfangyu removalofcopperiibybiocharmediatedbydissolvedorganicmatter AT huazhang removalofcopperiibybiocharmediatedbydissolvedorganicmatter AT limingshao removalofcopperiibybiocharmediatedbydissolvedorganicmatter AT fanlu removalofcopperiibybiocharmediatedbydissolvedorganicmatter
_version_	1718384730495254528

Removal of Copper (II) by Biochar Mediated by Dissolved Organic Matter

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