Abstract
This study evaluated the correlation between the amount of mercury (Hg) compounds in waste phosphor powder from spent UV curing lamps and their leaching characteristics. The appropriate thermal treatment conditions and Hg content in the residue necessary to satisfy the leaching criteria for classification as non-hazardous waste were identified. The decomposition of Hg compounds by thermal treatment was also evaluated by comparing sequential extraction results based on thermal stability and leaching potential of Hg compounds. Before the thermal treatment, the Hg content in waste phosphor powder and concentration in the leaching extract were 108.7 mg-Hg/kg and 0.56 mg-Hg/L, respectively. Hg compounds with low thermal stability were removed rapidly during the initial stage of thermal treatment at temperatures between 400 °C and 600 °C. After thermal treatment, Hg in the form of an intermetallic compound, such as Sr-Hg, was expected to be remained mainly, and the Hg content was reduced to 13 mg-Hg/kg in the waste phosphor powder, at that point the residue satisfied the leaching standard limit (5 μg-Hg/L) for non-hazardous waste stipulated in the legislation of Republic of Korea.
| Original language | English |
|---|---|
| Article number | 121094 |
| Journal | Journal of Hazardous Materials |
| Volume | 382 |
| DOIs | |
| Publication status | Published - 2020 Jan 15 |
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All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
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Correlation between mercury content and leaching characteristics in waste phosphor powder from spent UV curing lamp after thermal treatment. / Back, Seung Ki; Joung, Bup Mook; Lee, Eun Song; Sung, Jin Ho; Mojammal, A. H.M.; Park, Yong Joon; Seo, Yongchil.
In: Journal of Hazardous Materials, Vol. 382, 121094, 15.01.2020.Research output: Contribution to journal › Article
TY - JOUR
T1 - Correlation between mercury content and leaching characteristics in waste phosphor powder from spent UV curing lamp after thermal treatment
AU - Back, Seung Ki
AU - Joung, Bup Mook
AU - Lee, Eun Song
AU - Sung, Jin Ho
AU - Mojammal, A. H.M.
AU - Park, Yong Joon
AU - Seo, Yongchil
PY - 2020/1/15
Y1 - 2020/1/15
N2 - This study evaluated the correlation between the amount of mercury (Hg) compounds in waste phosphor powder from spent UV curing lamps and their leaching characteristics. The appropriate thermal treatment conditions and Hg content in the residue necessary to satisfy the leaching criteria for classification as non-hazardous waste were identified. The decomposition of Hg compounds by thermal treatment was also evaluated by comparing sequential extraction results based on thermal stability and leaching potential of Hg compounds. Before the thermal treatment, the Hg content in waste phosphor powder and concentration in the leaching extract were 108.7 mg-Hg/kg and 0.56 mg-Hg/L, respectively. Hg compounds with low thermal stability were removed rapidly during the initial stage of thermal treatment at temperatures between 400 °C and 600 °C. After thermal treatment, Hg in the form of an intermetallic compound, such as Sr-Hg, was expected to be remained mainly, and the Hg content was reduced to 13 mg-Hg/kg in the waste phosphor powder, at that point the residue satisfied the leaching standard limit (5 μg-Hg/L) for non-hazardous waste stipulated in the legislation of Republic of Korea.
AB - This study evaluated the correlation between the amount of mercury (Hg) compounds in waste phosphor powder from spent UV curing lamps and their leaching characteristics. The appropriate thermal treatment conditions and Hg content in the residue necessary to satisfy the leaching criteria for classification as non-hazardous waste were identified. The decomposition of Hg compounds by thermal treatment was also evaluated by comparing sequential extraction results based on thermal stability and leaching potential of Hg compounds. Before the thermal treatment, the Hg content in waste phosphor powder and concentration in the leaching extract were 108.7 mg-Hg/kg and 0.56 mg-Hg/L, respectively. Hg compounds with low thermal stability were removed rapidly during the initial stage of thermal treatment at temperatures between 400 °C and 600 °C. After thermal treatment, Hg in the form of an intermetallic compound, such as Sr-Hg, was expected to be remained mainly, and the Hg content was reduced to 13 mg-Hg/kg in the waste phosphor powder, at that point the residue satisfied the leaching standard limit (5 μg-Hg/L) for non-hazardous waste stipulated in the legislation of Republic of Korea.
UR - http://www.scopus.com/inward/record.url?scp=85071337276&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071337276&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2019.121094
DO - 10.1016/j.jhazmat.2019.121094
M3 - Article
VL - 382
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
M1 - 121094
ER -