Preparation of activated carbon from paper mill sludge by KOH-activation

Kang, Hwa-Young; Park, SangSook; Rim, Y.-T.

doi:10.1007/s11814-006-0013-3

Cited by 46 publications

(11 citation statements)

References 18 publications

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“…Physical activation requires rather high temperature (800-1100 ºC) treatment with a constant flow of steam, carbon dioxide, nitrogen or air [7,19]. While in chemical activation, the precursor material is mixed with certain dehydrating (activating) agents such as phosphoric acid (H 3 PO 4 ), potassium hydroxide (KOH), sodium hydroxide (NaOH), zinc chloride (ZnCl 2 ), sodium carbonate (Na 2 CO 3 ) [2,8,12] etc. Then, carbonization occurs at relatively lower temperatures compared to the physical activation temperature [4,3,18,16,10].…”

Section: Introductionmentioning

confidence: 99%

Activated Carbons Derived from Date (Phoenix dactylifera) Seeds with Excellent Iodine Adsorption Properties

Mallick

Jha

Pokharel

et al. 2019

J. Inst. Engineering

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Activated carbons were prepared from date seed powder by chemical activation method using potassium hydroxide (KOH)as activating agent at different temperatures (400, 500, 600 and 700 °C). Date seed powder was impregnated with KOH (1:1weight ratio) and carbonizations were carried out under a constant flow of nitrogen (120 cc/min) in a tubular furnace. The activated carbons thus obtained were characterized by powder X- Ray diffraction and Raman scattering. XRD patterns revealed amorphous carbon structure, which was further confirmed by the Raman scattering. Surface morphology of ACs was studied by scanning electron microscopy (SEM). Date seed derived activated carbons showed good iodine adsorption properties giving iodine number value of 850mg/g, which is much higher than the commercial activated carbons. Therefore, KOH activated date seed derived carbons would have potential in dye adsorption and waste water treatments.

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Section: Introductionmentioning

confidence: 99%

Activated Carbons Derived from Date (Phoenix dactylifera) Seeds with Excellent Iodine Adsorption Properties

Mallick

Jha

Pokharel

et al. 2019

J. Inst. Engineering

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“…Because of legislation and increased taxes, landfills are quickly being eliminated as a final destination for paper sludge. Common alternative disposal methods include incineration or recycling utilization, including the preparation of carbonized paper sludge (Kanno et al 2007) and activated carbon adsorbents (Littrell et al 2002;Kang et al 2006) from paper sludge. The most important problem before ultimate disposal is to reduce the moisture content of the sludge.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cellulase and Protease Pretreatment on Dewaterability of Waste Activated Sludge from Paper Mill

Zhang

Chen

et al. 2014

BioResources

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The feasibility of cellulase and protease pretreatment to improve the dewaterability of waste activated sludge from papermaking (WASP) was evaluated. Dewatering properties such as capillary suction time (CST), dry solids content of the sludge cakes from the specific resistance of filtration (SRF), and compression were measured to quantify the effects of cellulase and protease in sludge dewatering. The changes in the amounts of proteins (PN) and polysaccharides (PS) in tightly bound extracellular polymeric substances (TB-EPS) was found to be the most important parameter with respect to sludge dewatering. Further study, through nitrogen adsorption, verified the large change in the average pore width and surface area. Therefore, the disruption of TB-EPS and the change in the inner structure of WASP granules are the fundamental reasons for the enhanced dewaterability.

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“…The pyrolysis of paper sludge has been investigated by several researchers . The general goal of these studies is to investigate whether paper mill wastes can be thermally processed to create value‐added products, such as energy, biofuels and oils, and adsorbents, among others.…”

Section: Introductionmentioning

confidence: 99%

“…The char from the pyrolysis of paper sludge has been investigated as adsorbents for water treatment applications . The adsorbents made from paper sludge have been demonstrated in the adsorption of metals, dyes, and organics from water.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of deinked paper sludge to synthesize adsorbents for elemental Hg vapors

Almquist

Qin

2012

Env Prog and Sustain Energy

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Deinked paper sludge (DPS) was pyrolyzed at 600°C, 750°C, and 900°C in dry nitrogen to synthesize adsorbents. The performance of the pyrolyzed DPS for the gas‐phase adsorption of elemental mercury (Hg0) was investigated, and the performance was compared with that of BPL activated carbon as received (Calgon Carbon Corporation). In addition, the adsorption capacities of pyrolyzed DPS for Hg0 were compared with those published for other activated carbon adsorbents. The physical and chemical properties of pyrolyzed DPS and BPL were characterized to assess their differences, and those differences were used to hypothesize reasons for differences in their adsorption performance for Hg0. Characterization of the adsorbents was conducted using BET surface area, X‐ray diffraction, thermal gravimetric analyses, scanning electron microscopy, electron dispersion spectroscopy, and Fourier transform spectroscopy. Pyrolyzed DPS performed better than BPL for Hg0 adsorption, despite the significant difference in surface area (pyrolyzed DPS ∼50 m2/g; BPL 1100 m2/g). Reasons for differences in adsorption performance are likely due to the pore size distribution, presence of and access to surface active sites, and morphology of the pyrolyzed deinked paper sludge compared with BPL. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 524–534, 2013

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Preparation of activated carbon from paper mill sludge by KOH-activation

Cited by 46 publications

References 18 publications

Activated Carbons Derived from Date (Phoenix dactylifera) Seeds with Excellent Iodine Adsorption Properties

Activated Carbons Derived from Date (Phoenix dactylifera) Seeds with Excellent Iodine Adsorption Properties

Effect of Cellulase and Protease Pretreatment on Dewaterability of Waste Activated Sludge from Paper Mill

Pyrolysis of deinked paper sludge to synthesize adsorbents for elemental Hg vapors

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