Thermal analysis of growing media obtained from mixtures of paper mill waste materials and sewage sludge

Méndez, Ana; Barriga, Sandra; Guerrero, Francisca Parra; Gascó, Gabriel

doi:10.1007/s10973-010-1227-5

Cited by 23 publications

(14 citation statements)

References 27 publications

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“…After calcination, the peaks of talc remained, those of kaolinite and calcite disappeared and those of lime appeared due to the decarbonation of calcite and the formation of amorphous CaO-Al 2 O 3 -SiO 2 (CAS) [18] [19] (Figure 4(b)). Finally, the product mainly composed of katoite (Ca 3 Al 2 (SiO 4 )(OH) 8 ), which belongs to hydrogarnet group known as the materials with HCl removal ability (Figure 4(c)). …”

Section: Hcl Gas Removalmentioning

confidence: 99%

“…In our previous study, katoite, one of the hydrogarnet group mineral, was synthesized from paper sludge ash using alkali reaction with NaOH [15]. Hydrogarnet (Ca 3 Al 2 (SiO 4 )(OH) 8 ) is known as a major product of the hydration of calcium aluminate cements, and could be very useful for the fixation of hydrogen chloride gas at high temperatures [16] [17].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of HCl Gas Sorbent from Paper Sludge

Wajima¹

2017

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Paper sludge (PS) is generated as an industrial waste during the manufacture of recycled paper products, and amounts discharged globally are increasing annually. On the other hands, hydrogen chloride (HCl) is an acidic pollutant that is present in the flue gases of most municipal and hazardous waste incinerators. In this study, the removal of hydrogen chloride gas using the product from paper sludge at high temperatures (700˚C) using a fixed-bed flowtype reactor was investigated. PS can be granulated with distilled water using granulators, and the particle shapes can be kept after calcination and alkali reaction. Calcined PS and the product after alkali reaction of calcined PS have amorphous phases and katoite (Ca 3 Al 2 (SiO 4 )(OH) 8 ) phase, respectively, and both of these indicate HCl removal ability at high temperature (700˚C). The product from calcined PS via alkali reaction has higher HCl fixation ability (78 mg/g) than calcined PS. Removal experiments for HCl gas showed that the removal process followed pseudo-second-order kinetics rather than pseudofirst-order kinetics. These results suggested that the product particles with HCl gas removal ability at high temperature can be prepared from PS using calcination and alkali reaction.

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Section: Hcl Gas Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of HCl Gas Sorbent from Paper Sludge

Wajima¹

2017

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“…The amount of NH 4 + and PO 4 3-removed was calculated from the difference between the initial and the final concentrations in the solution. 8 ] were synthesized in this experimental condition. Without the addition of diatomite, hydroxysodalite was formed from the PS calcined at low temperatures (200, 400 °C) while katoite was synthesized from the PS calcined at high temperatures (600, 800, 1000 °C), regardless of reaction time, which means that the product phase cannot be improved by reaction time.…”

Section: -mentioning

confidence: 99%

“…The paper industry is of great environmental importance owing to the quantity of PS generated and its disposal. Although most PS is disposed of in open dumps or in landfills after incineration, a small part of the PS is used as a soil improver and fertilizer in agriculture [4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Zeolitic Material with the Ability to Simultaneous Remove NH4+ and PO43^|^minus; from Paper Sludge using Calcination and Alkali Treatment

Wajima¹

2014

J.I.E.

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Paper sludge (PS) was converted into a novel zeolitic material with the ability to simultaneously remove NH 4 + and PO 4 3-from an aqueous solution using calcination and alkali treatment. The sludge was calcined at 200-1000 °C for 6 h to have PO 4 3-removal ability, and was then converted into a zeolitic material upon reaction with a 1 -4 M NaOH solution at 80 °C to have NH 4 + removal ability. Also, the both removal abilities of the product was tried to improve using diatomite during the alkali reaction. Without the addition of diatomite, hydroxysodalite and katoite were obtained in the product, and with the addition of diatomite, zeolite-P appeared in the product. The product from the calcined PS with diatomite has a higher NH 4 + removal ability than those calcined without diatomite, and the product obtained from the 2 M NaOH solution with addition of diatomite has a high removal ability because of the zeolite-P phase in the product. On the other hand, regardless of diatomite addition or NaOH concentration the product from the PS calcined at 800 °C had a high PO 4 3-removal ability due to the present of active sites to remove PO 4 3-. The observed concentrations of Si, Al and Ca in the solutions during the reaction explain the crystallization behavior of these phases. The product synthesized from the PS calcined at 800 °C in 2 M NaOH solution with the addition of diatomite was able to simultaneously remove NH 4 + and PO 4 3-from the aqueous solution.

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“…At present, it is important to produce packing box [14], the environmental protection bags [15], paper handicraft [16], low-level paper [17], and pulp molding industry [18]. As poor toughness and strength of pulp sediments products [19], the used rubber powder toughened pulp sediment and sawdust reinforced pulp sediment were studied in this work to make full use of pulp sediment.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of environment friendly used rubber powder modified pulp sediments composites

Zhang

2012

Iran Polym J

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In recent years, with growing contradiction between energy supply and demand, the more and more high demand of the environmental protection is needed. The work represented an environment friendly method for recycling of waste rubber and pulp sediment that a new composite material was prepared using pulp sediment as the matrix, used rubber powder as the toughening agent, and sawdust as the reinforcement. The effects of used rubber powder content on the mechanical properties of the pulp sediment and sawdust/pulp sediment were studied by measuring Shore A hardness, tensile stress, and elongationat-break. The morphology of used rubber powder/pulp sediment composites was analyzed by scanning electronic microscopy and transmission electron microscopy. The curing conditions were also discussed. The results showed when the used rubber powder/pulp sediment mass ratio was 8/100, the used rubber powder/pulp sediment sample showed smooth surface, high hardness, compact structure, uniform arrangement, and good compatibility. When the pulp sediment used as the matrix, sawdust as the reinforcement, and used rubber powder as the toughening agent, the proper recipe of the composites was 100 phr pulp sediment, 30 phr sawdust, and 10 phr used rubber powder. The mechanical properties of the used rubber powder/pulp sediment were greater than those of pure pulp sediment and used rubber powder/sawdust/pulp sediment. The best curing conditions for the used rubber powder/pulp sediment composites were at 150°C under 5 MPa for 15 min. The study on used rubber powder modified pulp sediment, exploits a new way to recycle used rubber powder and pulp sediment, not only benefit environment purification, but also reduce cost of sheet materials, and develops a new way for the economy and environment protection.

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Thermal analysis of growing media obtained from mixtures of paper mill waste materials and sewage sludge

Cited by 23 publications

References 27 publications

Preparation of HCl Gas Sorbent from Paper Sludge

Preparation of HCl Gas Sorbent from Paper Sludge

Preparation of Zeolitic Material with the Ability to Simultaneous Remove NH4+ and PO43^|^minus; from Paper Sludge using Calcination and Alkali Treatment

Preparation and characterization of environment friendly used rubber powder modified pulp sediments composites

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