Removal of rhodamine B from aqueous solution via adsorption onto microwave-activated rice husk ash

Suc, Nguyen Van; Kim, Dang

doi:10.1080/01932691.2016.1155153

Cited by 42 publications

(12 citation statements)

References 36 publications

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“…CHA proved to be a better and sustainable adsorbent for the removing Rh-B dye among others. This is consistent with the findings reported in the literature on rhodamine-B dyes (Namasivayam and Kanchana 1992;Wilhelm and Stephan 2007;Hema and Arivoli 2007;Sureshkumar and Namasivayam 2008;Vasu 2008;Parab et al 2009;Li et al 2010;Sadasivam et al 2010;Gupta et al 2012;Ashkarran et al 2013;Gong et al 2013;Inyinbor et al 2015;Kooh et al 2016;Dharmendirakumar et al 2016;Dahri et al 2016;Fu et al 2016;Inyinbor et al 2016;Iqbal et al 2017;Singh et al 2017;Suc and Kim Chi 2017;Cheng et al 2017;Goswami and Phukan 2017;Adegoke et al 2019).…”

Section: Adsorption Kinetic Studiessupporting

confidence: 92%

“…Rhodamine-B (Rh-B) dye is an amphoteric dye; though often listed as a basic dye, to the class of xanthene dye, it is noted to be harmful when swallowed, with acute oral toxicity (Namasivayam and Kanchana 1992;Wilhelm and Stephan 2007;Hema and Arivoli 2007;Vasu 2008;Parab et al 2009;Li et al 2010;Gupta et al 2012;Ashkarran et al 2013;Gong et al 2013;Suc and Kim Chi 2017;Cheng et al 2017;Singh et al 2017;Adegoke et al 2019). Rh-B dye causes serious eye damage or irritation, hazardous to aquatic environment with long-term effects (Hema and Arivoli 2007;Sureshkumar and Namasivayam 2008;Sadasivam et al 2010;Gupta et al 2012;Inyinbor et al 2015;Dahri et al 2016;Dharmendirakumar et al 2016;Fu et al 2016;Inyinbor et al 2016;Kooh et al 2016;Goswami and Phukan 2017;Iqbal et al 2017;Adegoke et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Functionalized coconut husks for rhodamine-B dye sequestration

et al. 2019

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This study investigates the efficacy of acid activated coconut husk (CHA) for the removal of rhodamine-B (Rh-B) dye from aqueous solutions. The CHA prepared was characterized using various techniques: SEM, FTIR EDX, Boehm titration and pH pzc , respectively. The effects of different operational parameters including initial concentration, contact time and solution temperatures were examined. Kinetic data for Rh-B dye adsorption onto CHA fitted best to pseudo-second-order kinetic model considering the correlation regression (R 2 ) and the sum of squares of error values. Adsorption data were fitted to Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. Langmuir isotherm was the most fitted among all the models used with maximum monolayer sorption capacity of 1666.67 mg g −1 and the highest regression value of 0.99 indicating that CHA has greater affinity for Rh-B dye adsorption due to increased pore development via acid activation. Thermodynamic studies revealed an endothermic adsorption process with the ΔH 0 value of 62.77 kJ mol −1 . Spontaneity was ascertained based on the negative values of ΔG o (ranging from − 26.38 kJ mol −1 to − 20.93 kJ mol −1 ). The positive value of ΔS 0 (0.276 kJ mol −1 K −1 ) suggests increased randomness that exists between CHA and Rh-B dye. Cost analysis results revealed that CHA is six times cheaper than commercial activated carbon (CAC), providing a savings of 217 US$ kg −1 . CHA adsorbent was found to be suitable for Rh-B dye removal from aqueous solution.

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Section: Adsorption Kinetic Studiessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Functionalized coconut husks for rhodamine-B dye sequestration

et al. 2019

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“…The NiO(10%)/NiTiO 3 exhibits the fastest reaction rate, with a degradation rate constant of 2.40. Compared with similar studies in literatures, including novel photocatalysts [31] and the physical adsorption method based on sodium montmorillonite clay [32], microwave-activated rice husk ash [33], and activated carbon [34], the NiO(10%)/NiTiO 3 composite nanofiber also reveals comparable photocatalysis performance. Moreover, the composite nanofiber photocatalyst owns unique advantages, such as excellent catalytic rate, high stability, ease in separation, and reusability.…”

Section: Photocatalytic Performance and Photocatalytic Mechanismsupporting

confidence: 49%

Photocatalytic Performance of NiO/NiTiO3 Composite Nanofiber Films

et al. 2019

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Photocatalytic degradation of pollutants is one of the cleanest technologies for environmental remediation. Herein, we prepared NiO/NiTiO3 heterostructure nanofiber (200 nm) films by electrospinning and high temperature heat treatment, using nickel acetate and tetrabutyltitanate as nickel and titanium sources, respectively. The NiO/NiTiO3 heterostructure has advantages of good photodegradation rate constant and stability. By controlling the temperature, we can optimize the phase composition of these nanofibers for better photocatalytic performance. Based on our findings of the Rhodamine B degradation results, the best performance was obtained with 10% NiO and 90% NiTiO3; 92.9% of the Rhodamine B (5 mg/L) was degraded after reaction under full spectrum irradiation for 60 min. More importantly, the repeating test showed that these nanofiber films can remain active and stable after multiple cycles. The mechanisms of the photocatalysis reactions were also discussed. This demonstration provides a guideline in designing a new photocatalyst that we hope will serve the environmental needs for this and the coming century.

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“… 38 − 41 Furthermore, studies on the adsorption of organic dyes such as rhodamine B and remazol red by RHA have also been reported. 42 , 43 …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Methylene Blue Adsorption and pH Neutralization of Contaminated Water by Rice Husk Ash

et al. 2021

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In this study, the potential of rice husk ash (RHA) to act as an adsorbent for treating dye-containing wastewater was demonstrated. The RHA used in this study contained 91.7% silica, which was composed of crystalline (cristobalite and tridymite) and amorphous phases. The mechanochemical treatment of RHA led to an increase in its specific surface area from 6.2 to 14.6 m 2 /g in 15 min and dramatically improved its methylene blue (MB) adsorption ability. Langmuir adsorption isotherms revealed that the maximum adsorption capacity of the treated RHA was 8.59 mg/g, which is 2.45 times higher than that of raw RHA. pH-dependent adsorption studies on the RHA revealed that MB was adsorbed on the deprotonated Q 3 silanol through electrostatic interactions. Moreover, the RHA adsorbent showed pH buffering at a pH value of approximately 7; thus, the pH of the solution could be neutralized simultaneously with the adsorptive removal of MB.

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Removal of rhodamine B from aqueous solution via adsorption onto microwave-activated rice husk ash

Cited by 42 publications

References 36 publications

Functionalized coconut husks for rhodamine-B dye sequestration

Functionalized coconut husks for rhodamine-B dye sequestration

Photocatalytic Performance of NiO/NiTiO3 Composite Nanofiber Films

Simultaneous Methylene Blue Adsorption and pH Neutralization of Contaminated Water by Rice Husk Ash

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