Thermal detoxification of hazardous metal sludge by applied electromagnetic energy

Ching Hong Hsieh, Shang Lien Lo, Ching Yao Hu, Kaimin Shih, Wen Hui Kuan, Ching Lung Chen

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Industrial wastewater sludge was treated by microwave processes to enhance the stabilization of laden copper. The effects of additives, processing time, microwave adsorbents, moisture content, reaction atmosphere, and cooling gas were investigated. The stabilization results were significantly enhanced by metal powder additives, prolonged microwave processing time, proper moisture content, the addition of carbonaceous materials, and a reaction environment with inert gas. It was also found that the moisture content would increase the homogeneity of applied microwave energy, and thus achieve a better overall efficiency between stabilizing agents and copper. The added metal powders may reduce Cu(II) to Cu(0) in the sludge or TCLP. The resulting thermal energy of microwave radiation, and microarcing process and the oxidation heat of Al powder may also assist the transformation of Cu(II) into CuO and CuAl2O4 phases. Part of the sludge was vitrified within inert gas environment when the processing time was longer than 18 min and active carbon dosage was more than 3 g. Reduction reactions also occurred in the hybrid microwave processes, leading to the reduction of sulfates and metal ions, and the formation of Cu2S and FeS. Moreover, the microwave radiation can also enhance the feasibility of co-treating of inorganic and organic solid waste.

Original languageEnglish
Pages (from-to)1693-1700
Number of pages8
JournalChemosphere
Volume71
Issue number9
DOIs
Publication statusPublished - Apr 2008

Fingerprint

Electromagnetic Radiation
Detoxification
Microwaves
detoxification
Sewage
Electromagnetic waves
Hot Temperature
Metals
sludge
metal
microwave radiation
moisture content
energy
Powders
Noble Gases
Moisture
Powder metals
stabilization
Inert gases
gas

Keywords

  • Copper
  • Industrial wastewater sludge
  • Microwave
  • Stabilization

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)

Cite this

Thermal detoxification of hazardous metal sludge by applied electromagnetic energy. / Hsieh, Ching Hong; Lo, Shang Lien; Hu, Ching Yao; Shih, Kaimin; Kuan, Wen Hui; Chen, Ching Lung.

In: Chemosphere, Vol. 71, No. 9, 04.2008, p. 1693-1700.

Research output: Contribution to journalArticle

Hsieh, Ching Hong ; Lo, Shang Lien ; Hu, Ching Yao ; Shih, Kaimin ; Kuan, Wen Hui ; Chen, Ching Lung. / Thermal detoxification of hazardous metal sludge by applied electromagnetic energy. In: Chemosphere. 2008 ; Vol. 71, No. 9. pp. 1693-1700.
@article{c8f1b44c6b9d46478cd6e4d5adceea4b,
title = "Thermal detoxification of hazardous metal sludge by applied electromagnetic energy",
abstract = "Industrial wastewater sludge was treated by microwave processes to enhance the stabilization of laden copper. The effects of additives, processing time, microwave adsorbents, moisture content, reaction atmosphere, and cooling gas were investigated. The stabilization results were significantly enhanced by metal powder additives, prolonged microwave processing time, proper moisture content, the addition of carbonaceous materials, and a reaction environment with inert gas. It was also found that the moisture content would increase the homogeneity of applied microwave energy, and thus achieve a better overall efficiency between stabilizing agents and copper. The added metal powders may reduce Cu(II) to Cu(0) in the sludge or TCLP. The resulting thermal energy of microwave radiation, and microarcing process and the oxidation heat of Al powder may also assist the transformation of Cu(II) into CuO and CuAl2O4 phases. Part of the sludge was vitrified within inert gas environment when the processing time was longer than 18 min and active carbon dosage was more than 3 g. Reduction reactions also occurred in the hybrid microwave processes, leading to the reduction of sulfates and metal ions, and the formation of Cu2S and FeS. Moreover, the microwave radiation can also enhance the feasibility of co-treating of inorganic and organic solid waste.",
keywords = "Copper, Industrial wastewater sludge, Microwave, Stabilization",
author = "Hsieh, {Ching Hong} and Lo, {Shang Lien} and Hu, {Ching Yao} and Kaimin Shih and Kuan, {Wen Hui} and Chen, {Ching Lung}",
year = "2008",
month = "4",
doi = "10.1016/j.chemosphere.2008.01.006",
language = "English",
volume = "71",
pages = "1693--1700",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - Thermal detoxification of hazardous metal sludge by applied electromagnetic energy

AU - Hsieh, Ching Hong

AU - Lo, Shang Lien

AU - Hu, Ching Yao

AU - Shih, Kaimin

AU - Kuan, Wen Hui

AU - Chen, Ching Lung

PY - 2008/4

Y1 - 2008/4

N2 - Industrial wastewater sludge was treated by microwave processes to enhance the stabilization of laden copper. The effects of additives, processing time, microwave adsorbents, moisture content, reaction atmosphere, and cooling gas were investigated. The stabilization results were significantly enhanced by metal powder additives, prolonged microwave processing time, proper moisture content, the addition of carbonaceous materials, and a reaction environment with inert gas. It was also found that the moisture content would increase the homogeneity of applied microwave energy, and thus achieve a better overall efficiency between stabilizing agents and copper. The added metal powders may reduce Cu(II) to Cu(0) in the sludge or TCLP. The resulting thermal energy of microwave radiation, and microarcing process and the oxidation heat of Al powder may also assist the transformation of Cu(II) into CuO and CuAl2O4 phases. Part of the sludge was vitrified within inert gas environment when the processing time was longer than 18 min and active carbon dosage was more than 3 g. Reduction reactions also occurred in the hybrid microwave processes, leading to the reduction of sulfates and metal ions, and the formation of Cu2S and FeS. Moreover, the microwave radiation can also enhance the feasibility of co-treating of inorganic and organic solid waste.

AB - Industrial wastewater sludge was treated by microwave processes to enhance the stabilization of laden copper. The effects of additives, processing time, microwave adsorbents, moisture content, reaction atmosphere, and cooling gas were investigated. The stabilization results were significantly enhanced by metal powder additives, prolonged microwave processing time, proper moisture content, the addition of carbonaceous materials, and a reaction environment with inert gas. It was also found that the moisture content would increase the homogeneity of applied microwave energy, and thus achieve a better overall efficiency between stabilizing agents and copper. The added metal powders may reduce Cu(II) to Cu(0) in the sludge or TCLP. The resulting thermal energy of microwave radiation, and microarcing process and the oxidation heat of Al powder may also assist the transformation of Cu(II) into CuO and CuAl2O4 phases. Part of the sludge was vitrified within inert gas environment when the processing time was longer than 18 min and active carbon dosage was more than 3 g. Reduction reactions also occurred in the hybrid microwave processes, leading to the reduction of sulfates and metal ions, and the formation of Cu2S and FeS. Moreover, the microwave radiation can also enhance the feasibility of co-treating of inorganic and organic solid waste.

KW - Copper

KW - Industrial wastewater sludge

KW - Microwave

KW - Stabilization

UR - http://www.scopus.com/inward/record.url?scp=41649106216&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=41649106216&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2008.01.006

DO - 10.1016/j.chemosphere.2008.01.006

M3 - Article

C2 - 18280536

AN - SCOPUS:41649106216

VL - 71

SP - 1693

EP - 1700

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

IS - 9

ER -