Advances in environmental research

  • 제3권2호
  • /
  • Pages.163-172
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  • 2014
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  • 2234-1722(pISSN)
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  • 2234-1730(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Magnetite for phosphorus removal in low concentration phosphorus-contained water body

  • Xiang, Heng (Institute of Urban Environment, CAS) ;
  • Liu, Chaoxiang (Institute of Urban Environment, CAS) ;
  • Pan, Ruiling (Key Lab of Northwest Water Resources, Environment and Ecology, MoE, Xi'an University of Architecture and Technology) ;
  • Han, Yun (Key Lab of Northwest Water Resources, Environment and Ecology, MoE, Xi'an University of Architecture and Technology) ;
  • Cao, Jing (North China Institute of Science & Technology)
  • 투고 : 2013.10.12
  • 심사 : 2014.05.05
  • 발행 : 2014.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Magnetite was chosen as a typical adsorbent to study its phosphate adsorption capacity in water body with low concentration of phosphorus (below $2mg\;PL^{-1}$). Magnetite was collected from Luoyang City, Henan Province, China. In this research, three factors have been studied to describe the adsorption of phosphate on magnetite, which was solution concentration (concentration ranging from 0.1 to $2.5mg\;PL^{-1}$), suspension pH (1 to 13) and temperature (ranging from $10^{\circ}C$ to $40^{\circ}C$). In addition, the modified samples had been characterized with XRD and FE-SEM image. The results show that iron ions contains in magnetite were the main factors of phosphorus removal. The behavior of phosphorus adsorption to substrates could be fitted to both Langmuir and Freundlich isothermal adsorption equations in the low concentration phosphorus water. The theoretical saturated adsorption quantity of magnetite is 0.158 mg/g. pH has great influence on the phosphorus removal of magnetite ore by adsorption. And pH of 3 can receive the best results. While temperature has little effect on it. Magnetite was greatly effective for phosphorus removal in the column experiments, which is a more practical reflection of phosphorous removal combing the adsorption isotherm model and the breakthrough curves. According to the analysis of heavy metals release, the release of heavy metals was very low, they didn't produce the secondary pollution. The mechanism of uptake phosphate is in virtue of chemisorption between phosphate and ferric ion released by magnetite oxidation. The combined investigation of the magnetite showed that it was better substrate for water body with low concentration of phosphorus.

키워드

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피인용 문헌

  1. Mill Scale–Derived Magnetite Particles: Effective Adsorbent for the Removal of Phosphate in Aqueous Solutions vol.143, pp.12, 2017, https://doi.org/10.1061/(ASCE)EE.1943-7870.0001278