Preparation and sorption properties of materials from paper sludge

M. Hojamberdiev, Yoshikazu Kameshima, A. Nakajima, K. Okada, Z. Kadirova

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Three materials were prepared from paper sludge (PS) using different treatment processes and their sorption abilities for phosphate and methylene blue (MB) were determined. The samples were a powder sample prepared by heating PS in air (sample C), a pellet prepared by grinding, forming and heating PS in air (sample G) and a powder prepared by physical activation of PS in flowing wet nitrogen (sample A). The three samples were heated at 600-900 °C for 6 h. On heating at 700-800 °C, the organic fibers, limestone (CaCO3), kaolinite (Al2Si2O5(OH)4) and talc (Mg3Si4O10(OH)2) in the original PS were converted to amorphous CaO-Al2O3-SiO2 (CAS) and talc in sample C, while CAS was formed in sample G and activated carbon, CAS and talc was formed in sample A. On heating at 900 °C the CAS converted to gehlenite (Ca2Al2SiO7) and anorthite (CaAl2Si2O8). The specific surface areas (SBET) of the three samples achieved maximum values of 23, 37 and 70 m2/g upon heating at 700, 600 and 600 °C, respectively. The SBET value of the activated sample A was distinctly lower than usually reported for activated carbon. The samples C, G and A achieved maximum phosphate sorption capacities of 2.04, 1.38 and 1.70 mmol/g, calculated from the Langmuir model, upon heating at 700, 700 and 800 °C, respectively. The maximum sorption capacity for phosphate in sample C is attributed to the sorption by CAS, namely, adsorption on the alumina component and precipitation as Ca-phosphates. The MB multifunctional sorption capacity of sample A was 0.11 mmol/g. The phosphate and MB sorption rates show better correlation with a pseudo-second order model than with other models.

Original languageEnglish
Pages (from-to)710-719
Number of pages10
JournalJournal of Hazardous Materials
Volume151
Issue number2-3
DOIs
Publication statusPublished - Mar 1 2008
Externally publishedYes

Fingerprint

Sewage
Heating
Sorption
sorption
sludge
Phosphates
Talc
heating
phosphate
Methylene Blue
talc
Powders
Activated carbon
activated carbon
Carbon
Air
Kaolin
anorthite
Aluminum Oxide
Calcium Carbonate

Keywords

  • Calcination
  • Mechanical grinding
  • Methylene blue
  • Paper sludge
  • Phosphate ion
  • Physical activation
  • Simultaneous sorption

ASJC Scopus subject areas

  • Chemical Health and Safety
  • Process Chemistry and Technology
  • Safety, Risk, Reliability and Quality
  • Environmental Engineering

Cite this

Preparation and sorption properties of materials from paper sludge. / Hojamberdiev, M.; Kameshima, Yoshikazu; Nakajima, A.; Okada, K.; Kadirova, Z.

In: Journal of Hazardous Materials, Vol. 151, No. 2-3, 01.03.2008, p. 710-719.

Research output: Contribution to journalArticle

Hojamberdiev, M. ; Kameshima, Yoshikazu ; Nakajima, A. ; Okada, K. ; Kadirova, Z. / Preparation and sorption properties of materials from paper sludge. In: Journal of Hazardous Materials. 2008 ; Vol. 151, No. 2-3. pp. 710-719.
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AB - Three materials were prepared from paper sludge (PS) using different treatment processes and their sorption abilities for phosphate and methylene blue (MB) were determined. The samples were a powder sample prepared by heating PS in air (sample C), a pellet prepared by grinding, forming and heating PS in air (sample G) and a powder prepared by physical activation of PS in flowing wet nitrogen (sample A). The three samples were heated at 600-900 °C for 6 h. On heating at 700-800 °C, the organic fibers, limestone (CaCO3), kaolinite (Al2Si2O5(OH)4) and talc (Mg3Si4O10(OH)2) in the original PS were converted to amorphous CaO-Al2O3-SiO2 (CAS) and talc in sample C, while CAS was formed in sample G and activated carbon, CAS and talc was formed in sample A. On heating at 900 °C the CAS converted to gehlenite (Ca2Al2SiO7) and anorthite (CaAl2Si2O8). The specific surface areas (SBET) of the three samples achieved maximum values of 23, 37 and 70 m2/g upon heating at 700, 600 and 600 °C, respectively. The SBET value of the activated sample A was distinctly lower than usually reported for activated carbon. The samples C, G and A achieved maximum phosphate sorption capacities of 2.04, 1.38 and 1.70 mmol/g, calculated from the Langmuir model, upon heating at 700, 700 and 800 °C, respectively. The maximum sorption capacity for phosphate in sample C is attributed to the sorption by CAS, namely, adsorption on the alumina component and precipitation as Ca-phosphates. The MB multifunctional sorption capacity of sample A was 0.11 mmol/g. The phosphate and MB sorption rates show better correlation with a pseudo-second order model than with other models.

KW - Calcination

KW - Mechanical grinding

KW - Methylene blue

KW - Paper sludge

KW - Phosphate ion

KW - Physical activation

KW - Simultaneous sorption

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