Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping

Metal ions in sediment are inherent Ca and Fe sources for biochar modification. In this work, the effect of Ca2+ and Fe2+ released from sediment on biochar for phosphorus adsorption was evaluated. Results showed that raw peanut shell biochar (PSB) was poor in phosphorus adsorption (0.48 mg/g); sedim...

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Autores principales:	Cheng Gao, Jie Fan, Xujie Zhang, Zhiwei Gong, Zhenyu Tan
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	biochar ca2+ endogenous phosphorus metal ions sediment capping Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/d58c42bd4c1f4257a6725618109f4484
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spelling	oai:doaj.org-article:d58c42bd4c1f4257a6725618109f44842021-11-06T11:26:30ZSediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping0273-12231996-973210.2166/wst.2021.411https://doaj.org/article/d58c42bd4c1f4257a6725618109f44842021-10-01T00:00:00Zhttp://wst.iwaponline.com/content/84/8/2057https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Metal ions in sediment are inherent Ca and Fe sources for biochar modification. In this work, the effect of Ca2+ and Fe2+ released from sediment on biochar for phosphorus adsorption was evaluated. Results showed that raw peanut shell biochar (PSB) was poor in phosphorus adsorption (0.48 mg/g); sediment-triggered biochar (S-PSB) exhibited a P adsorption capacity of 1.32 mg/g in capping reactor and maximum adsorption capacity of 10.72 mg/g in the Langmuir model. Sediment released Ca2+ of 2.2–4.1 mg/L and Fe2+/Fe3+ of 0.2–9.0 mg/L. The metals loaded onto the biochar surface in the forms of Ca-O and Fe-O, with Ca and Fe content of 1.47 and 0.29%, respectively. Sediment metals made point of zero charge (pHpzc) of biochar shifted from 5.39 to 6.46. The mechanisms of enhanced P adsorption by S-PSB were surface complexation of CaHPO4 followed by precipitation of Ca3(PO4)2 and Ca5(PO4)3(OH). Sediment metals induced the modification of biochar and improvement of P adsorption, which was feasible to overcome the shortcomings of biochar on phosphorus control in sediment capping. HIGHLIGHTS Biochar was triggered by sediment Ca2+ and Fe2+.; Metals loaded on biochar surface as Ca-O and Fe-O.; q of S-PSB was 2.5 times higher than PSB.; Metal-loaded biochar was a seed for Ca-P complexation and precipitation.;Cheng GaoJie FanXujie ZhangZhiwei GongZhenyu TanIWA Publishingarticlebiocharca2+endogenous phosphorusmetal ionssediment cappingEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 8, Pp 2057-2067 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biochar ca2+ endogenous phosphorus metal ions sediment capping Environmental technology. Sanitary engineering TD1-1066
spellingShingle	biochar ca2+ endogenous phosphorus metal ions sediment capping Environmental technology. Sanitary engineering TD1-1066 Cheng Gao Jie Fan Xujie Zhang Zhiwei Gong Zhenyu Tan Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
description	Metal ions in sediment are inherent Ca and Fe sources for biochar modification. In this work, the effect of Ca2+ and Fe2+ released from sediment on biochar for phosphorus adsorption was evaluated. Results showed that raw peanut shell biochar (PSB) was poor in phosphorus adsorption (0.48 mg/g); sediment-triggered biochar (S-PSB) exhibited a P adsorption capacity of 1.32 mg/g in capping reactor and maximum adsorption capacity of 10.72 mg/g in the Langmuir model. Sediment released Ca2+ of 2.2–4.1 mg/L and Fe2+/Fe3+ of 0.2–9.0 mg/L. The metals loaded onto the biochar surface in the forms of Ca-O and Fe-O, with Ca and Fe content of 1.47 and 0.29%, respectively. Sediment metals made point of zero charge (pHpzc) of biochar shifted from 5.39 to 6.46. The mechanisms of enhanced P adsorption by S-PSB were surface complexation of CaHPO4 followed by precipitation of Ca3(PO4)2 and Ca5(PO4)3(OH). Sediment metals induced the modification of biochar and improvement of P adsorption, which was feasible to overcome the shortcomings of biochar on phosphorus control in sediment capping. HIGHLIGHTS Biochar was triggered by sediment Ca2+ and Fe2+.; Metals loaded on biochar surface as Ca-O and Fe-O.; q of S-PSB was 2.5 times higher than PSB.; Metal-loaded biochar was a seed for Ca-P complexation and precipitation.;
format	article
author	Cheng Gao Jie Fan Xujie Zhang Zhiwei Gong Zhenyu Tan
author_facet	Cheng Gao Jie Fan Xujie Zhang Zhiwei Gong Zhenyu Tan
author_sort	Cheng Gao
title	Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
title_short	Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
title_full	Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
title_fullStr	Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
title_full_unstemmed	Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
title_sort	sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d58c42bd4c1f4257a6725618109f4484
work_keys_str_mv	AT chenggao sedimentmetalsadheringtobiocharenhancedphosphorusadsorptioninsedimentcapping AT jiefan sedimentmetalsadheringtobiocharenhancedphosphorusadsorptioninsedimentcapping AT xujiezhang sedimentmetalsadheringtobiocharenhancedphosphorusadsorptioninsedimentcapping AT zhiweigong sedimentmetalsadheringtobiocharenhancedphosphorusadsorptioninsedimentcapping AT zhenyutan sedimentmetalsadheringtobiocharenhancedphosphorusadsorptioninsedimentcapping
_version_	1718443699915980800

Sediment metals adhering to biochar enhanced phosphorus adsorption in sediment capping

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