Evaluation of various microwave-assisted acid digestion procedures for the determination of major and heavy metal elements in municipal solid waste incineration fly ash

Han，Siyu1; Ju，Tongyao1; Meng，Yuan1; Du，Yufeng1; Xiang，Honglin1; Aihemaiti，Aikelaimu2; Jiang，Jianguo1

2021-10-25

10.1016/j.jclepro.2021.128922

Journal of Cleaner Production   影响因子和分区

0959-6526

1879-1786

Municipal solid waste incineration (MSWI) generates large amounts of fly ash, which requires proper disposal due to containing high levels of toxic elements. Accurate determination of the contents of these elements is crucial to its further treatment and utilization. Microwave-assisted acid digestion is a widely used approach for elemental determination in MSWI fly ash. The digestion procedure affects the analytical results of element contents. This study compares various procedures for microwave-assisted acid digestion of MSWI fly ash in the literature and standard methods. Factors including four common acid combinations and sample mass (from 25 to 250 mg) were investigated, and the analytical results for major and heavy metal element contents were evaluated. The effects of HF and HClO in acid combinations were studied in detail. The results showed that acid combinations and sample mass significantly affect analytical results for Ca, Mg, Al, Ba, and Sr. HF is essential to the total digestion of MSWI fly ash, but can lead to loss of Ca, Mg, Al, Ba, and Sr. Loss of elements was caused by the precipitation of Ca and HF as well as complex co-precipitation reactions during digestion. Reducing sample mass and using HClO can mitigate loss of element and facilitate the determination of elements in MSWI fly ash.

Heavy metal elements Major elements Microwave-assisted acid digestion Municipal solid waste incineration fly ash

SCI ; EI

英语

其他

National Natural Science Foundation of China[21776160]

Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology

Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences

WOS:000705777200032

ELSEVIER SCI LTD

20213710878454

Fly ash ; Heavy metals ; Microwaves ; Municipal solid waste ; Waste disposal ; Waste incineration

Municipal and Industrial Wastes; Waste Treatment and Disposal:452 ; Industrial Wastes Treatment and Disposal:452.4 ; Metallurgy and Metallography:531 ; Electromagnetic Waves:711

2-s2.0-85114391404

Scopus

1.School of Environment,Tsinghua University,Beijing,100084,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Han，Siyu,Ju，Tongyao,Meng，Yuan,et al. Evaluation of various microwave-assisted acid digestion procedures for the determination of major and heavy metal elements in municipal solid waste incineration fly ash[J]. Journal of Cleaner Production,2021,321.

Han，Siyu.,Ju，Tongyao.,Meng，Yuan.,Du，Yufeng.,Xiang，Honglin.,...&Jiang，Jianguo.(2021).Evaluation of various microwave-assisted acid digestion procedures for the determination of major and heavy metal elements in municipal solid waste incineration fly ash.Journal of Cleaner Production,321.

Han，Siyu,et al."Evaluation of various microwave-assisted acid digestion procedures for the determination of major and heavy metal elements in municipal solid waste incineration fly ash".Journal of Cleaner Production 321(2021).