Surface characterization and dye adsorptive capacities of char obtained from pyrolysis/gasification of sewage sludge

Jindarom, Charothon; Meeyoo, Vissanu; Kitiyanan, Boonyarach; Rirksomboon, Thirasak; Rangsunvigit, Pramoch

doi:10.1016/j.cej.2007.02.002

Cited by 170 publications

(69 citation statements)

References 21 publications

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“…At 300 °C there was no change noticed, however at 500 °C, specific surface passed from 82 to 189 m 2 /g, tab.1, which is consistent to results from Jindarom et al [16] who observed a drastic change in specific surface from 550°C.…”

Section: Gas Environment Effectsupporting

confidence: 81%

“…All parameters studied did not vary, which is consistent to theory mentioning that CO 2 is inert at lower temperature (Jindarom et al [16], tab. 1).…”

Section: Gas Environment Effectsupporting

confidence: 70%

“…In the presence of CO 2 , char yield is usually reduced towards formation of volatiles (Minkova [17] and Butterman and Castaldi [15]). Jindarom et al [16] observed that for temperatures around 350 to 750 °C, the use of CO 2 in comparison of N 2 resulted in chars with higher char specific surface and basicity levels. High specific surfaces as well as high porosity are two desired characteristics for soil amendment applications since it may represent a favourable site for beneficial microorganisms proliferation as well as an exchange surface for nutrient retention or water absorption attributes (Lehmann and Joseph [1]).…”

Section: Introductionmentioning

confidence: 99%

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Biomass char production at low severity conditions under CO₂and N₂environments

Pilon

Lavoie

2011

WIT Transactions on Ecology and the Environment

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In a perspective of biomass value addition, biomass char, a thermochemical product, long time considered as a residue, is now getting attention and may represent a vector in the sustainability of the whole biomass sector. Some char types were shown to have great potential as a solid fuel or precursor for further transformations as well as having attributes for storage and transportation. Other types showed potential as a soil carbon sequestration technique and soil amendment enhancing biomass yields. Depending on several factors, but mostly on biomass and production conditions, biomass char physico-chemical characteristics may vary tremendously. Therefore, in order to be used in accordance for specific utilizations, its characteristics must be carefully understood and controlled. In this study, chars with varying properties were produced in a custom-made lab-scale fixed bed reactor. Along these experiments, various biomass chars were produced under CO 2 and N 2 for temperatures of 300 and 500 °C. Char was produced from switchgrass (Panicum virgatum L.) an energy crop grown in Canada. It was then characterized for ultimate and proximate analysis as well as for calorific value. In addition, specific surface was characterized by Brunauer-Emmett-Teller (BET) technique. Char organic content composition was verified by Soxhlet extractions using dichloromethane and extracts were analysed by GC-MS.

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Section: Gas Environment Effectsupporting

confidence: 81%

“…All parameters studied did not vary, which is consistent to theory mentioning that CO 2 is inert at lower temperature (Jindarom et al [16], tab. 1).…”

Section: Gas Environment Effectsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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Biomass char production at low severity conditions under CO₂and N₂environments

Pilon

Lavoie

2011

WIT Transactions on Ecology and the Environment

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“…Most of the chars derived from many sources have been found to exhibit good performance for basic dyes (Table 1). However, the bamboo biochar in this study exhibited a high adsorption capacity for acid dye and was found to be comparable to those of many corresponding chars from rice straw, sewage sludge and crop residues (Hameed and El-Khaiary 2008;Jindarom et al 2007;Xu et al 2011). …”

Section: Effect Of Ph On Adsorption Capacitymentioning

confidence: 99%

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Yang

Lin

Wei³

et al. 2013

Int. J. Environ. Sci. Technol.

154

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Metal-complex dyes are widely used in textile industry, but harmful to the environment and human health due to aromatic structure and heavy metal ions. The objective of this work was to evaluate the adsorption potential of bamboo biochar for the removal of metalcomplex dye acid black 172 from solutions. Freundlich model was more suitable for the adsorption process of bamboo biochar than Langmuir isotherm, indicating multilayer adsorption of acid black 172 on a heterogeneous bamboo biochar surface. Adsorption kinetics analysis of pseudo-second-order and Weber-Morris models revealed that intraparticle transport was not the only rate-limiting step. The bamboo biochar exhibited a good adsorption performance even at high ionic strength. Analysis based on the artificial neural network indicated that the temperature with a relative importance of 29 % appeared to be the most influential parameter in the adsorption process for dye removal, followed by time, ionic strength, pH and dye concentration.

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“…This particularly concerns adsorbents prepared from PET mixed with decomposable Mg compounds. In comparison with results reported by others [35], RR198 uptake by the studied adsorbents can be estimated as superior compared to that measured for the char produced from sewage sludge.…”

Section: Removal Of Reactive Red 198 From Watermentioning

confidence: 59%

Removal of model contaminants from water by porous carbons obtained through carbonization of poly(ethylene terephthalate) mixed with some magnesium compounds

2012

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Porous carbons were prepared through carbonization of poly(ethylene terephthalate) contained in mixtures with either light basic magnesium carbonate, or magnesium carbonate, or magnesium hydroxide, or magnesium oxide. Pore structure of the obtained carbon materials was presented in relation to a kind of magnesium compound and weight ratio of the raw materials used for preparations. Additionally, an influence of the preparation temperature on the porosity and the pore creation mechanism are briefly discussed. The carbons obtained were tested as sorbent materials for elimination of model contaminants from water. For that purpose, removal of several pollutants of different molecular weights including phenol, Basic Red 18 dye, and Reactive Red 198 dye is presented and discussed in relation to the porosity of the prepared materials.

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Surface characterization and dye adsorptive capacities of char obtained from pyrolysis/gasification of sewage sludge

Cited by 170 publications

References 21 publications

Biomass char production at low severity conditions under CO₂and N₂environments

Biomass char production at low severity conditions under CO₂and N₂environments

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Removal of model contaminants from water by porous carbons obtained through carbonization of poly(ethylene terephthalate) mixed with some magnesium compounds

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Surface characterization and dye adsorptive capacities of char obtained from pyrolysis/gasification of sewage sludge

Cited by 170 publications

References 21 publications

Biomass char production at low severity conditions under CO2and N2environments

Biomass char production at low severity conditions under CO2and N2environments

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Removal of model contaminants from water by porous carbons obtained through carbonization of poly(ethylene terephthalate) mixed with some magnesium compounds

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Product

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Biomass char production at low severity conditions under CO₂and N₂environments

Biomass char production at low severity conditions under CO₂and N₂environments