Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery

Biochars prepared from macro-algae have a lower C/N ratio compared to lignocellulosic biochar, which is advantageous for direct nutrition. In particular, <i>Sargassum</i>, a marine macro-algae, has a high Mg content; hence, it can be expected to adsorb P and N simultaneously. In this stu...

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Autores principales:	Ye-Eun Lee, Yoonah Jeong, Dong-Chul Shin, Kwang-Ho Ahn, Jin-Hong Jung, I-Tae Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	phosphate recovery ammonia recovery Mg doping <i>Sargassum horneri</i> algal biochar Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/81b468704f744b9980533e04cb764930
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spelling	oai:doaj.org-article:81b468704f744b9980533e04cb7649302021-11-25T19:04:04ZFabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery10.3390/su1322127522071-1050https://doaj.org/article/81b468704f744b9980533e04cb7649302021-11-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/22/12752https://doaj.org/toc/2071-1050Biochars prepared from macro-algae have a lower C/N ratio compared to lignocellulosic biochar, which is advantageous for direct nutrition. In particular, <i>Sargassum</i>, a marine macro-algae, has a high Mg content; hence, it can be expected to adsorb P and N simultaneously. In this study, <i>Sargassum horneri</i> biochar (SB), pyrolyzed at 400, 500, and 600 °C, was doped with innate Mg through water leaching, and nutrient recovery from the wastewater-mimicking solution was confirmed. The biochar pyrolyzed at 600 °C showed maximum Mg adsorption during water leaching, and the efficiency of K and Na removal was also high, at 92.7% and 91.9%, respectively. The addition of MgCl<sub>2</sub> during pyrolysis and high ion exchange did not show distinct advantages for surface modification and nutrient adsorption. X-ray photoelectron spectroscopy analysis confirmed the participation of biochar in the surface adsorption of Mg and PO<sub>4</sub> recovery. The PO<sub>4</sub> sorption capacity of biochar reached >120 mg·g<sup>−1</sup>, while the sorption capacity for NH<sub>4</sub> was low, at 22.8–28.2 mg·g<sup>−1</sup>, suggesting that Mg-surface-doped SB presented excellent phosphorus recovery. Hence, upgrading an adsorbent as a wastewater-treatment material and soil ameliorant that recovers nutrients using innate Mg from <i>Sargassum</i> is possible through appropriate surface modification.Ye-Eun LeeYoonah JeongDong-Chul ShinKwang-Ho AhnJin-Hong JungI-Tae KimMDPI AGarticlephosphate recoveryammonia recoveryMg doping<i>Sargassum horneri</i>algal biocharEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 12752, p 12752 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	phosphate recovery ammonia recovery Mg doping <i>Sargassum horneri</i> algal biochar Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	phosphate recovery ammonia recovery Mg doping <i>Sargassum horneri</i> algal biochar Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Ye-Eun Lee Yoonah Jeong Dong-Chul Shin Kwang-Ho Ahn Jin-Hong Jung I-Tae Kim Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery
description	Biochars prepared from macro-algae have a lower C/N ratio compared to lignocellulosic biochar, which is advantageous for direct nutrition. In particular, <i>Sargassum</i>, a marine macro-algae, has a high Mg content; hence, it can be expected to adsorb P and N simultaneously. In this study, <i>Sargassum horneri</i> biochar (SB), pyrolyzed at 400, 500, and 600 °C, was doped with innate Mg through water leaching, and nutrient recovery from the wastewater-mimicking solution was confirmed. The biochar pyrolyzed at 600 °C showed maximum Mg adsorption during water leaching, and the efficiency of K and Na removal was also high, at 92.7% and 91.9%, respectively. The addition of MgCl<sub>2</sub> during pyrolysis and high ion exchange did not show distinct advantages for surface modification and nutrient adsorption. X-ray photoelectron spectroscopy analysis confirmed the participation of biochar in the surface adsorption of Mg and PO<sub>4</sub> recovery. The PO<sub>4</sub> sorption capacity of biochar reached >120 mg·g<sup>−1</sup>, while the sorption capacity for NH<sub>4</sub> was low, at 22.8–28.2 mg·g<sup>−1</sup>, suggesting that Mg-surface-doped SB presented excellent phosphorus recovery. Hence, upgrading an adsorbent as a wastewater-treatment material and soil ameliorant that recovers nutrients using innate Mg from <i>Sargassum</i> is possible through appropriate surface modification.
format	article
author	Ye-Eun Lee Yoonah Jeong Dong-Chul Shin Kwang-Ho Ahn Jin-Hong Jung I-Tae Kim
author_facet	Ye-Eun Lee Yoonah Jeong Dong-Chul Shin Kwang-Ho Ahn Jin-Hong Jung I-Tae Kim
author_sort	Ye-Eun Lee
title	Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery
title_short	Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery
title_full	Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery
title_fullStr	Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery
title_full_unstemmed	Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery
title_sort	fabrication of mg-doped sargassum biochar for phosphate and ammonium recovery
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/81b468704f744b9980533e04cb764930
work_keys_str_mv	AT yeeunlee fabricationofmgdopedsargassumbiocharforphosphateandammoniumrecovery AT yoonahjeong fabricationofmgdopedsargassumbiocharforphosphateandammoniumrecovery AT dongchulshin fabricationofmgdopedsargassumbiocharforphosphateandammoniumrecovery AT kwanghoahn fabricationofmgdopedsargassumbiocharforphosphateandammoniumrecovery AT jinhongjung fabricationofmgdopedsargassumbiocharforphosphateandammoniumrecovery AT itaekim fabricationofmgdopedsargassumbiocharforphosphateandammoniumrecovery
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Fabrication of Mg-Doped Sargassum Biochar for Phosphate and Ammonium Recovery

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