Characterization of Dioxins and Heavy Metals in Chelated Fly Ash
Municipal solid waste incineration (MSWI) fly ash contains highly toxic heavy metals and polychlorinated dibenzo dioxins/furans (PCDD/Fs), which are a type of hazardous waste. The pollution characteristics of fly ash have changed with the development of stoker grate incinerators and the fly ash trea...
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MDPI AG
2022-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/13/4868 |
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| author | Shuping Pan Qi Yao Wenxiang Cai Yaqi Peng Yuhao Luo Zhizhen Wang Caiping Jiang Xiaodong Li Shengyong Lu |
| author_facet | Shuping Pan Qi Yao Wenxiang Cai Yaqi Peng Yuhao Luo Zhizhen Wang Caiping Jiang Xiaodong Li Shengyong Lu |
| author_sort | Shuping Pan |
| collection | DOAJ |
| description | Municipal solid waste incineration (MSWI) fly ash contains highly toxic heavy metals and polychlorinated dibenzo dioxins/furans (PCDD/Fs), which are a type of hazardous waste. The pollution characteristics of fly ash have changed with the development of stoker grate incinerators and the fly ash treatment technology; however, no research has been focused on this in recent years. In this study, 12 fly ash samples were collected from 9 grate power plants in southeastern China, and their PCDD/Fs and heavy metal concentrations were determined and compared to previous fly ash data. The PCDD/Fs concentration in fly ash was in the range of 0.002–0.051 ngI-TEQ/g, with an average of 0.027 ngI-TEQ/g. Furthermore, 1,2,3,4,6,7,8-HpCDD and OCDD made the most significant contributions to PCDDs. The distribution of 10 dioxins exhibited bimodal, unimodal, and normal characteristics. Linear fitting demonstrated a strong correlation between toxicity and 1,2,3,7,8-PentaCDD, 1,2,3,7,8-PentaCDF, and 2,3,4,7,8-PentaCDF. Concerning heavy metals, Pb poses a significant environmental risk. This is the first time that fly ash treated with a chelating agent has been thoroughly analyzed, which is vital for understanding the pollution level and treatment of fly ash derived from current power plants. |
| first_indexed | 2024-03-09T21:55:42Z |
| format | Article |
| id | doaj.art-6264c960ec424b55851279e785fac4ba |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T21:55:42Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-6264c960ec424b55851279e785fac4ba2023-11-23T19:58:37ZengMDPI AGEnergies1996-10732022-07-011513486810.3390/en15134868Characterization of Dioxins and Heavy Metals in Chelated Fly AshShuping Pan0Qi Yao1Wenxiang Cai2Yaqi Peng3Yuhao Luo4Zhizhen Wang5Caiping Jiang6Xiaodong Li7Shengyong Lu8Zhejiang Ecological Environment Monitoring Center, Hangzhou 310007, ChinaInstitute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, ChinaZhejiang Ecological Environment Monitoring Center, Hangzhou 310007, ChinaInstitute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, ChinaZhejiang Ecological Environment Monitoring Center, Hangzhou 310007, ChinaZhejiang Ecological Environment Monitoring Center, Hangzhou 310007, ChinaZhejiang Ecological Environment Monitoring Center, Hangzhou 310007, ChinaInstitute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, ChinaInstitute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, ChinaMunicipal solid waste incineration (MSWI) fly ash contains highly toxic heavy metals and polychlorinated dibenzo dioxins/furans (PCDD/Fs), which are a type of hazardous waste. The pollution characteristics of fly ash have changed with the development of stoker grate incinerators and the fly ash treatment technology; however, no research has been focused on this in recent years. In this study, 12 fly ash samples were collected from 9 grate power plants in southeastern China, and their PCDD/Fs and heavy metal concentrations were determined and compared to previous fly ash data. The PCDD/Fs concentration in fly ash was in the range of 0.002–0.051 ngI-TEQ/g, with an average of 0.027 ngI-TEQ/g. Furthermore, 1,2,3,4,6,7,8-HpCDD and OCDD made the most significant contributions to PCDDs. The distribution of 10 dioxins exhibited bimodal, unimodal, and normal characteristics. Linear fitting demonstrated a strong correlation between toxicity and 1,2,3,7,8-PentaCDD, 1,2,3,7,8-PentaCDF, and 2,3,4,7,8-PentaCDF. Concerning heavy metals, Pb poses a significant environmental risk. This is the first time that fly ash treated with a chelating agent has been thoroughly analyzed, which is vital for understanding the pollution level and treatment of fly ash derived from current power plants.https://www.mdpi.com/1996-1073/15/13/4868MSWI fly ashPCDD/Fsheavy metals |
| spellingShingle | Shuping Pan Qi Yao Wenxiang Cai Yaqi Peng Yuhao Luo Zhizhen Wang Caiping Jiang Xiaodong Li Shengyong Lu Characterization of Dioxins and Heavy Metals in Chelated Fly Ash Energies MSWI fly ash PCDD/Fs heavy metals |
| title | Characterization of Dioxins and Heavy Metals in Chelated Fly Ash |
| title_full | Characterization of Dioxins and Heavy Metals in Chelated Fly Ash |
| title_fullStr | Characterization of Dioxins and Heavy Metals in Chelated Fly Ash |
| title_full_unstemmed | Characterization of Dioxins and Heavy Metals in Chelated Fly Ash |
| title_short | Characterization of Dioxins and Heavy Metals in Chelated Fly Ash |
| title_sort | characterization of dioxins and heavy metals in chelated fly ash |
| topic | MSWI fly ash PCDD/Fs heavy metals |
| url | https://www.mdpi.com/1996-1073/15/13/4868 |
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