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Volume 38 Issue 10
Nov.  2020
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2020  >  38(10): 222-227
CHEN Mei-feng, LI Xin-li, YANG Pei-lin, LUO Qian, QIN Fan-xin. STABILIZATION OF AS CONTAMINATED SOILS BY MODIFIED NANO-TITANIUM DIOXIDE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 222-227. doi: 10.13205/j.hjgc.202010035
Citation: CHEN Mei-feng, LI Xin-li, YANG Pei-lin, LUO Qian, QIN Fan-xin. STABILIZATION OF AS CONTAMINATED SOILS BY MODIFIED NANO-TITANIUM DIOXIDE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 222-227. doi: 10.13205/j.hjgc.202010035
shu

STABILIZATION OF AS CONTAMINATED SOILS BY MODIFIED NANO-TITANIUM DIOXIDE

doi: 10.13205/j.hjgc.202010035

  • 1. Guizhou Provincial Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University, Guiyang 550001, China;

  • 2. School of Life Sciences, Guizhou Normal University, Guiyang 550001, China

  • Received Date: 2019-07-22
    Abstract
  • In this study, red soil, purple soil, black soil and yellow soil were used to study the stabilization effect of modified nano-titanium dioxide on arsenic in soil. The modified nano titanium dioxide was prepared by sol-gel process. The active carbon supported nano titanium dioxide (ACT) and iron modified activated carbon supported titanium dioxide (ACTI) were prepared by sol gel method. The nano size titanium dioxide (T-100) and activated carbon (AC) with a diameter of 100nm were used as the control materials. Modified nano-titanium dioxide was added to the tested soil according to different mass ratios. After 14 days of stabilization, the stabilization effect of modified nano-titanium dioxide on arsenic in different types of soil was studied by simple bioavailability extraction test SBET. The results showed that the arsenic fixation ability of the four types of tested soils was in the sequence of red soil>black soil>yellow soil>purple soil. ACTI and ACT were superior to the control materials T-100 and AC in arsenic stabilization in four types of soils. With 2% addition of ACTI and ACT, the stabilization rates of arsenic in four types of soils were higher than 60%. Therefore, ACTI and ACT can be used as stabilizers for arsenic-contaminated soil remediation.
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