SN@silicate: an anionic dye sorbent and its reuse

Wei, Yanping; Gao, Hong‐Wen

doi:10.1039/c2jm16132j

Cited by 19 publications

(14 citation statements)

References 39 publications

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“…The biosorption of both dyes was favorable at high temperatures indicating the endothermic nature of the process. This might be due to increase in the number of molecules att aining suffi cient energy to undergo chemical reaction with the biosorbent [28]. Another reason was the increase in the number of pores on the biomass surface at high temperature.…”

Section: Eff Ect Of Temperaturementioning

confidence: 99%

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Removal of anionic dyes by rice milling waste from synthetic effluents: equilibrium and thermodynamic studies

Bhatti¹,

Safa

2012

Desalination and Water Treatment

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A B S T R AC TThis study describes the removal of Everdirect Orange-3GL and Direct Blue-67 by low cost rice milling waste in a batch mode. The eff ect of various process parameters like solution pH, particle size, biosorbent dose, initial dyes concentration, contact time and temperature on the removal of anionic dyes was investigated. Maximum biosorption capacity of rice milling waste was observed at pH 1 and 3 for Everdirect Orange-3GL and Direct Blue-67, respectively. The results showed that the biosorption capacity of rice milling waste decreased with increase in biosorbent dose and increased with increase in initial dyes concentration and temperature. A maximum biosorption capacity of 31.44 and 52.63 mg/g was observed for Everdirect Orange-3GL and Direct Blue-67, respectively. Analysis of equilibrium data was done by commonly used isotherms. The experimental data followed the Langmuir, Freundlich and Temkin isotherm models very well. Adsorption data of both dyes was bett er described by the pseudo-secondorder kinetic model. Thermodynamic study revealed that the process was feasible and spontaneous at higher temperatures. Positive value of H° (13.31 and 40.64 kJ/mol) showed that the process was endothermic in nature. FT-IR spectrum was also taken to investigate the functional groups involved in the biosorption of anionic dyes. The results suggested the applicability of rice milling waste in industrial processes for remediation of industrial effl uents.

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Section: Eff Ect Of Temperaturementioning

confidence: 99%

“…A similar behavior was observed for the adsorption of anionic dyes by the hybrid material prepared from octadecyl dimethyl hydroxyethyl quaternary ammonium (SN) and magnesium silicate. This hybrid contained a large number of positive charges which att racted the anionic dyes [28].…”

Section: Thermodynamics Studiesmentioning

confidence: 99%

Removal of anionic dyes by rice milling waste from synthetic effluents: equilibrium and thermodynamic studies

Bhatti¹,

Safa

2012

Desalination and Water Treatment

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“…occulation and disinfection. 64 A few studies have suggested that phenolic compounds can be adsorbed by sorbent through intermolecular acting force (mainly hydrophobic interaction). 34 Adsorption of phenol, o-chlorophenol and BPA in the PEI@SiO 2 composite is to accord with the lipidwater-partition law (Fig.…”

Section: Adsorption Of Solo Phenolic Compounds On Pei@siomentioning

confidence: 99%

PEI@SiO₂: synthesis from diatomite and application for capturing phenolic compounds from aqueous solution

Chen

Gao

2014

RSC Adv.

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“…多数 IO 材料通常以超细粉末形式存在, 使用时难以与水溶液有效分离. 魏艳平等 [9] 将磁性铁氧化物与 IO 材料复合, 使材料带有磁性通过磁铁分离 [10] . 这种方法也用于无机吸附剂的回收, 如将磁性铁氧化物与活性炭复合, 以方便活性炭的回收 [11] .…”

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Betaine OSB-12@kaolin Hybrid Material Synthesized for Adsorption of Dyes

徐刚¹,

郜洪文²

2012

Acta Chim. Sinica

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A new nano-sized inorganic/organic (IO) hybrid material was synthesized by self-assembly of OSB-12 into layered aluminum silicate via a coprecipitation method. The process of the fabrication of hybrid material consisted of the following steps. Firstly, aluminum nitrate and OSB-12 were homogeneous mixed in the water. Thereafter, sodium silicate was slowly added in. Elemental analysis indicated that the combination ratio of aluminum silicate and OSB-12 was 2.2∶1. The hybrid was characterized by Zeta potential, Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM) and surface area and porosity analyzer. The results showed that OSB-12 was inserted into the aluminum silicate layer in hydbrid material with lamellar and porous structure. Based on the amphiphilic characteristic of OSB-12, the resulted hybrid could be used as a sorbent to cationic and anionic dyes simultaneously. Meanwhile, the micron fiber contained hybrid and polyacrylonitrile (PAN) was also prepared by electrospinning, which can provide a convenient recycle of sorbent from water. Various factors affecting the adsorption were investigated. Under the optimum conditions, the maximum adsorption capacity was 471 mg/g of cationic (weak acid pink red B) and 847 mg/g of anionic dyes (victoria blue BO) respectively. The adsorptions process obeyed the Langmuir isothermal model and Frendlich isothermal model, because of the electric charge attraction playing a key role between ionic dye and OSB-12 embedding in the hybrid sorbent. The changes of Zeta potential of dye solution confirmed the point. In addition, the reused of the waste fiber was also been considered, the fiber was roasted in high temperature (600 ℃) to obtain a porous kaolin material which had tremendous adsorption capacity to heavy metal, the adsorption capacity was more than 8.3 mg/g of Cr 3＋ . It can be predicted that the hybrid had a tremendous application potential in dye wastewater treatment from dye removal efficiency and material separation properties.

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SN@silicate: an anionic dye sorbent and its reuse

Cited by 19 publications

References 39 publications

Removal of anionic dyes by rice milling waste from synthetic effluents: equilibrium and thermodynamic studies

Removal of anionic dyes by rice milling waste from synthetic effluents: equilibrium and thermodynamic studies

PEI@SiO₂: synthesis from diatomite and application for capturing phenolic compounds from aqueous solution

Betaine OSB-12@kaolin Hybrid Material Synthesized for Adsorption of Dyes

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SN@silicate: an anionic dye sorbent and its reuse

Cited by 19 publications

References 39 publications

Removal of anionic dyes by rice milling waste from synthetic effluents: equilibrium and thermodynamic studies

Removal of anionic dyes by rice milling waste from synthetic effluents: equilibrium and thermodynamic studies

PEI@SiO2: synthesis from diatomite and application for capturing phenolic compounds from aqueous solution

Betaine OSB-12@kaolin Hybrid Material Synthesized for Adsorption of Dyes

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PEI@SiO₂: synthesis from diatomite and application for capturing phenolic compounds from aqueous solution