INCINERATION DISPOSAL OF HYPERACCUMULATOR SEDUM PLUMBIZINCICOLA AND LEACHING TOXICITY OF HEAVY METALS

ZHAO Bo; ZHONG Daoxu; ZHANG Yaping; WU Longhua; ZHAO Jie

doi:10.13205/j.hjgc.202202015

Volume 40 Issue 2

Apr. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(2): 93-99

ZHAO Bo, ZHONG Daoxu, ZHANG Yaping, WU Longhua, ZHAO Jie. INCINERATION DISPOSAL OF HYPERACCUMULATOR SEDUM PLUMBIZINCICOLA AND LEACHING TOXICITY OF HEAVY METALS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 93-99. doi: 10.13205/j.hjgc.202202015

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ZHAO Bo, ZHONG Daoxu, ZHANG Yaping, WU Longhua, ZHAO Jie. INCINERATION DISPOSAL OF HYPERACCUMULATOR SEDUM PLUMBIZINCICOLA AND LEACHING TOXICITY OF HEAVY METALS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 93-99. doi: 10.13205/j.hjgc.202202015

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INCINERATION DISPOSAL OF HYPERACCUMULATOR SEDUM PLUMBIZINCICOLA AND LEACHING TOXICITY OF HEAVY METALS

doi: 10.13205/j.hjgc.202202015

ZHAO Bo^1,2,
ZHONG Daoxu^1,4,
ZHANG Yaping³,
WU Longhua^{1,2
,
,},
ZHAO Jie¹

1. CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Key Laboratory of Energy Thermal Conversion and Process Measurement and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
4. Key Laboratory of Environmental Engineering of Jiangsu Province, Jiangsu Provincial Academy of Environmental Sciences, Nanjing 210036, China

Received Date: 2021-02-10
Available Online: 2022-04-02
Publish Date: 2022-04-02

Abstract

Abstract

The weight loss and heavy metal distribution in fly ash from incineration of a cadmium(Cd) and zinc(Zn) hyperaccumulation plant, Sedum plumbizincicola were studied in a fluidized bed incinerator and a thermogravimetric analyzer. Meanwhile, the basic characteristics including particle distribution, microscopic morphology and leaching toxicity of cyclone ash and bag filter ash under different incineration temperatures were compared, to provide data support for the further disposal and resource utilization of incineration products. The results showed that the weight loss of S. plumbizincicola during incineration could be divided into three periods: moisture evaporation, fast decomposition, and fixed carbon combustion. The particle size distribution patterns of cyclone ash and bag filter ash both followed a normal distribution, and the particle size in bag filter ash was smaller. Complex and diverse microscopic morphology of the two fly ashes was found, with mostly rod-shaped, small spherical, irregular polymer and honeycomb porous structure. Metal(Cd, Zn and Pb) concentrations in the fly ashes firstly increased and then decreased with the increasing temperature, and reached maximum values at 800 ℃. In addition, the TCLP leaching toxicity of metals in the two fly ashes far exceeded the standard limit, indicating high leaching risk in environment.
- hyperaccumulator,
- incineration fly ash,
- incineration temperature,
- heavy metals,
- leaching toxicity

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References(27)

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