Removal of dyes from aqueous solutions using activated carbon prepared from rice husk residue

Li, Yaxin; Zhang, Xian; Yang, Ruiguang; Li, Guiying; Hu, Changwei

doi:10.2166/wst.2015.450

Cited by 30 publications

(13 citation statements)

References 29 publications

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“…The adsorption effect of algae residue biochar on methyl orange molecules becomes worse, thus reducing the removal rate (Subbaiah & Kim 2016;Yu et al 2018). The experimental results are consistent with the conclusions of removing methyl orange dye in an aqueous solution by activated carbon prepared by (Li et al 2016) using rice husk residue and biochar prepared by (Yu et al 2018) using chicken manure. Therefore, to improve the adsorption capacity of algal residue biochar on methyl orange dye solution, the initial pH of the reaction system was adjusted to 2.0 in the other batches of experiments.…”

Section: Effect Of Initial Phsupporting

confidence: 84%

“…The above results showed that when the concentration of methyl orange in the solution was constant, the adsorption sites on the biochar surface also increased accordingly with the increase of biochar dosage. A large number of active sites competed for limited methyl orange molecules, which reduced the amount of methyl orange adsorbed by unit mass biochar (Li et al 2016;Malviya et al 2019;Huang et al 2020), but the removal rate of methyl orange by biochar increased gradually.…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

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Characterization of algae residue biochar and its application in methyl orange wastewater treatment

Zhu

2021

Water Science and Technology

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In this work, Spirulina residue was used as the raw material to prepare different biochars by changing the pyrolysis time. Moreover, the obtained products were characterized by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction energy spectra. This experiment used the batch adsorption method to study the adsorption effect of pH, dosage, and pyrolysis time on methyl orange. The adsorption of methyl orange onto Spirulina residue biochar (SRBC) were fitted with the Langmuir isotherm model and pseudo-second-order kinetics. The results showed that the surface functional groups of SRBC obtained by dry pyrolysis were abundant, and could effectively adsorb methyl orange dye in an aqueous solution. The sample prepared at 500 °C for 5 h had the best adsorption effect on methyl orange. The change of pyrolysis time will affect the physicochemical properties of biochar from Spirulina residue, thereby affecting its adsorption effect on methyl orange dye. The analysis showed that the chemical adsorption of SRBC on methyl orange might be the primary way of dye removal. The results can provide a reference for preparing biochar from algae residue and biochar application in the removal of dye wastewater.

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Section: Effect Of Initial Phsupporting

confidence: 84%

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

Characterization of algae residue biochar and its application in methyl orange wastewater treatment

Zhu

2021

Water Science and Technology

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“…Therefore, although PF is a non-graphitizable material, ACs synthesized from this precursor presents outstanding physicochemical properties, with equal or even better results than most of the graphitizable precursors offering an interesting destination for waste PF [4,24,39,40].…”

Section: Tablementioning

confidence: 99%

High value activated carbons from waste polystyrene foams

Paula

Castro

Ortega

et al. 2018

Microporous and Mesoporous Materials

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Activated carbons (AC) with excellent textural properties have been obtained for the first time from waste polystyrene foam (PF), without any previous treatment, following a simple and conventional two-step procedure (formation of char followed by chemical activation). Even considering that the PF is not a graphitizable material, the best AC produced from this precursor has a very high BET surface area larger than 2700 m 2 g-1 and a pore volume of 1.2 cm 2 g-1 , with a significant contribution of small mesopores. As a consequence, this AC reveals a surprising capacity to adsorption of relatively large molecules and a high specific capacitance when applied as a supercapacitor electrode. The maximum amount of adsorbed methylene blue obtained by batch equilibrium experiments are greater than 1g g-1. In the context of the technical difficulties and low economic return of the reuse and recycling of waste PF, this work offers a strategic destination for this environmentally unfriendly residue.

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“…The main limitation regarding the application of AC in WWTPs is the high cost of the available commercial ACs, for which the used precursors have a great contribution [12]. Therefore, the use of wastes (industrial and agricultural) as new resources to produce ACs is gaining increasing attention since it can be also an alternative management strategy, in line with the new paradigm of a circular and sustainable economy [13,14]. Primary paper mill sludge (PS), a residue derived from the primary treatment of the effluents of the pulp and paper industry, may be a promising precursor of ACs.…”

Section: Introductionmentioning

confidence: 99%

Production of highly efficient activated carbons from industrial wastes for the removal of pharmaceuticals from water—A full factorial design

Jaria

Silva

Oliveira

et al. 2019

Journal of Hazardous Materials

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The wide occurrence of pharmaceuticals in aquatic environments urges the development of cost-effective solutions for their removal from water. In a circular economy context, primary paper mill sludge (PS) was used to produce activated carbon (AC) aiming the adsorptive removal of these contaminants. The use of low-cost precursors for the preparation of ACs capable of competing with commercial ACs continues to be a challenge. A full factorial design of four factors (pyrolysis temperature, residence time, precursor/activating agent ratio, and type of activating agent) at two levels was applied to the production of AC using PS as precursor. The responses analysed were the yield of production, percentage of adsorption for three pharmaceuticals (sulfamethoxazole, carbamazepine, and paroxetine), specific surface area (S), and total organic carbon (TOC). Statistical analysis was performed to evaluate influencing factors in the responses and to determine the most favourable production conditions. Four ACs presented very good responses, namely on the adsorption of the pharmaceuticals under study (average adsorption percentage around 78%, which is above that of commercial AC), and S between 1389 and 1627 m g. A desirability analysis pointed out 800 °C for 60 min and a precursor/KOH ratio of 1:1 (w/w) as the optimal production conditions.

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Removal of dyes from aqueous solutions using activated carbon prepared from rice husk residue

Cited by 30 publications

References 29 publications

Characterization of algae residue biochar and its application in methyl orange wastewater treatment

Characterization of algae residue biochar and its application in methyl orange wastewater treatment

High value activated carbons from waste polystyrene foams

Production of highly efficient activated carbons from industrial wastes for the removal of pharmaceuticals from water—A full factorial design

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