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Yang, Yuanyuan [Author]; Tan, Xiaofei [Author]; Almatrafi, Eydhah [Author]; Ye, Shujing [Author]; Song, Biao [Author]; Chen, Qiang [Author]; Yang, Hailan [Author]; Fu, Qianmin [Author]; Deng, Yuanyuan [Author]; Zeng, Zhuotong [Author]; Zeng, Guangming [Author]

Alfalfa Biochar Supported Mg-Fe Layered Double Hydroxide as Filter Media to Remove Trace Metal(Loid)S from Stormwater

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  • Media type: E-Book
  • Title: Alfalfa Biochar Supported Mg-Fe Layered Double Hydroxide as Filter Media to Remove Trace Metal(Loid)S from Stormwater
  • Contributor: Yang, Yuanyuan [Author]; Tan, Xiaofei [Author]; Almatrafi, Eydhah [Author]; Ye, Shujing [Author]; Song, Biao [Author]; Chen, Qiang [Author]; Yang, Hailan [Author]; Fu, Qianmin [Author]; Deng, Yuanyuan [Author]; Zeng, Zhuotong [Author]; Zeng, Guangming [Author]
  • Published: [S.l.]: SSRN, [2022]
  • Extent: 1 Online-Ressource (61 p)
  • Language: English
  • DOI: 10.2139/ssrn.4039704
  • Identifier:
  • Origination:
  • Footnote:
  • Description: Polluted stormwater (PSW) treatment is increasingly urgent with the existence of multiple pollutants from non-point-pollution sites. In this work, alfalfa biochar (AF) loaded with Mg/Fe layered double hydroxide (Mg/Fe-LDH) was successfully synthesized to remove trace metal(loid)s from stormwater. The adsorption kinetics and isotherms of metal(loid)s in mono-component system, and the reusability of composite materials were investigated in detail. The result showed that the maximum remove efficiency for Pb(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), As(Ⅴ), Cd(Ⅱ) and Cr(VI) were 98.98%, 98.11, 97.88, 97.71,98.81 and 50.89%, respectively, when added calcined AF-LDH (AF-LDO) composite material to multi-component solution. Besides, further characterizations of composite materials have been conducted, suggested the main mechanisms of cationic metal(loid) removal were regarded as ion exchange and surface precipitation, while anionic metal(loid)s was mainly dislodged through the formation of surface complexation, electrostatic attraction and interlayer anion exchange with AF-LDH. Importantly, the batch isotherms and breakthrough curves of column experiment all demonstrated that AF-LDO showed superiority for anionic metal(loid) removal from real stormwater than AF-LDH. This work synthesizes AF-LDH and AF-LDO for trace metal(loid) removal and propose a new view to stormwater purification in practical treatment
  • Access State: Open Access