Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration

ZHONG Shan; FENG Jing-kun; CHEN Yang; KUANG Wei; PAN Jing; XIAN Si-yu; LIU Yuan-yuan

Volume 41 Issue 12

Dec. 2013

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Article Navigation > Journal of Fuel Chemistry and Technology > 2013 > 41(12): 1532-1538

ZHONG Shan, FENG Jing-kun, CHEN Yang, KUANG Wei, PAN Jing, XIAN Si-yu, LIU Yuan-yuan. Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1532-1538.

Citation:

ZHONG Shan, FENG Jing-kun, CHEN Yang, KUANG Wei, PAN Jing, XIAN Si-yu, LIU Yuan-yuan. Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1532-1538.

Citation:

ZHONG Shan, FENG Jing-kun, CHEN Yang, KUANG Wei, PAN Jing, XIAN Si-yu, LIU Yuan-yuan. Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1532-1538.

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Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration

1.
College of Environment and Resources, Guangxi Normal University, Guilin 541004, China;
2.
Guilin Wastewater Engineering Management Department, Guilin 541002, China;
3.
College of Municipal and Environment Engineering, Chongqing University, Chongqing 400044, China

Received Date: 2013-04-11
Rev Recd Date: 2013-06-17
Publish Date: 2013-12-30

Abstract

Abstract

The volatility and the stabilization of heavy metals in fly ash in municipality & agriculture mixed waste incineration(Type A) and municipal solid waste incineration(Type B) were investigated. And the heavy metals stabilization mechanism was studied by using FT-IR and XRD. The results indicate that the volatility of heavy metals is higher in type B than that in type A, and is significantly affected by the content of chloride in waste source. The volatility of heavy metals in fly ash varies in a sequence of Mn, Cr < Zn, Cu < Pb, Cd. More than 50% of Pb and Cd are volatilized when the temperature exceeds 1 000 ℃. The relatively optimal thermal treatment temperature is 800 ℃and the heavy metals stabilization is higher and the evaporation rate is lower. The primary mechanism of heavy metals stabilization is the formation of stable silicate structure system above 800 ℃.
- solid waste incineration,
- thermal treatment,
- stabilization,
- evaporation

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References(17)

References

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