Removal of sulphate from aqueous solution using modified rice straw: Preparation, characterization and adsorption performance

Cao, Wei; Dang, Zhi; Zhou, Xin; Yi, Xiaoyun; Wu, Pingxiao; Zhu, Nengwu; Lu, Guining

doi:10.1016/j.carbpol.2011.03.016

Cited by 132 publications

(69 citation statements)

References 29 publications

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“…However, the pH of the solution increased with an increase of Ca(OH) 2 dosage. e reaction of NaAlO 2 hydrolysis could be inhibited by hydroxide ions; meanwhile, the hydroxide ions could promote the formation of monosulfate, andnally, the SO 4 2− removal decreased with the increase of the solution pH.…”

Section: Removal Of Sulfate Ionsmentioning

confidence: 99%

“…e experimental steps of the ettringite precipitation method are as follows: (1) 1 L of solution sample was taken in a glass reactor, and a certain amount of Ca(OH) 2 and NaAlO 2 was added to the solution. (2) en, the sample was stirred at a certain speed for a certain time. (3) Finally, the sample was taken and filtered under vacuum using a 0.45 μm microporous membrane filter.…”

Section: Removal Of Sulfate Ionsmentioning

confidence: 99%

“…In addition, the wastewater also contains a large number of inorganic anions (NO 3 − , Cl − , and F − ) and heavy metal ions (Mg 2+ and Mn 2+ ). ough SO 4 2− is a common and nontoxic component of various types of water bodies, high concentrations of SO 4 2− in the water can cause a series of serious environmental problems, leading to water mineralization, metal corrosion, pipes and equipment scaling, toxic hydrogen sulfide release, and disruption in the balance of the natural sulfur cycle [2][3][4][5]. In addition, high concentrations of SO 4 2− (>600 mg/L) in the water can cause laxative effects in mammals [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Removal of High-Concentration Sulfate Ions from the Sodium Alkali FGD Wastewater Using Ettringite Precipitation Method: Factor Assessment, Feasibility, and Prospect

Fang

Tang

Chen

et al. 2018

Journal of Chemistry

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e feasibility of removal of sulfate ions from the sodium alkali FGD wastewater using the ettringite precipitation method was evaluated. Factors affecting the removal of sulfate ions, such as NaAlO 2 dosage, Ca(OH) 2 dosage, solution temperature, anions (Cl − , NO 3 − and F − ), and heavy metal ions (Mg 2+ and Mn 2+ ), were investigated, and the optimal experimental conditions for the removal of sulfate ions were determined. Experimental results indicate that the ettringite precipitation method can effectively remove SO 4 2− with removal efficiency of more than 98%. All the investigated factors have influences on the removal of sulfate ions, and among them, the dosage of reagents, solution temperature, and fluoride ions have the strongest influence. In addition, the method can effectively synergistically remove F − and heavy metal ions with removal efficiencies of more than 90% and 99%, respectively; meanwhile, Cl − and NO 3 − also can be removed minimally by the method. e result of actual wastewater treatment shows that the method is feasible for treating high-concentration sulfate wastewater. e ettringite precipitation method has the potential to be a commercial application in the future.

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Section: Removal Of Sulfate Ionsmentioning

confidence: 99%

Section: Removal Of Sulfate Ionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of High-Concentration Sulfate Ions from the Sodium Alkali FGD Wastewater Using Ettringite Precipitation Method: Factor Assessment, Feasibility, and Prospect

Fang

Tang

Chen

et al. 2018

Journal of Chemistry

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“…In recent decade, enormous efforts have been experimentally devoted for development of rapid, simple, and sensitive methods for sulphate adsorption. [4][5][6] For example, Mulinari et al 4 have investigated adsorption of sulphate ions by modification of sugarcane bagasse cellulose and showed a good adsorption capacity. Removal of sulphate ions from aqueous solution using modified rice straw was studied by Cao et al.…”

Section: Sulphate (So 4 2−mentioning

confidence: 99%

“…Removal of sulphate ions from aqueous solution using modified rice straw was studied by Cao et al. 5 Their results exhibit a good sulphate adsorption performance. Also, the properties of sulphate adsorption have been theoretically studied by different groups.…”

Section: Sulphate (So 4 2−mentioning

confidence: 99%

Remove of Sulphate Ion from Environmental Systems by using AlN Nanotubes

Baei¹,

Hashemian²,

Torabi³

et al. 2014

Bulletin of the Korean Chemical Society

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The adsorption behavior of the sulphate (SO4 2− ) on the external surface of (5,0), (8,0), and (10,0) zigzag AlNNTs was studied by using density functional calculations. Adsorption energies in the nanotubes are about −8.59, −8.04, −8.60 eV with a charge transfer of 0.59, 0.48, 0.56|e| from the sulphate ion to the nanotubes, respectively. The adsorption energies indicated that sulphate ion can be absorbed strongly on the nanotubes. Therefore, these nanotubes can be used for adsorption of sulphate ion from the environmental systems. It was found that diameter of the AlNNTs has slight role in the adsorption of sulphate ion. The electronic properties of the nanotubes showed notable changes upon the adsorption process.

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Modifications of Lignocellulose Fibers and its Application in Adsorption of Heavy Metals from Aqueous Solution

Neto

Barros

Melo

et al. 2015

Surface Modification of Biopolymers

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Removal of sulphate from aqueous solution using modified rice straw: Preparation, characterization and adsorption performance

Cited by 132 publications

References 29 publications

Removal of High-Concentration Sulfate Ions from the Sodium Alkali FGD Wastewater Using Ettringite Precipitation Method: Factor Assessment, Feasibility, and Prospect

Removal of High-Concentration Sulfate Ions from the Sodium Alkali FGD Wastewater Using Ettringite Precipitation Method: Factor Assessment, Feasibility, and Prospect

Remove of Sulphate Ion from Environmental Systems by using AlN Nanotubes

Modifications of Lignocellulose Fibers and its Application in Adsorption of Heavy Metals from Aqueous Solution

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