Adsorption Performance of Methylene Blue on Modified Coal Gangue

Wang, Hui Juan; Wang, Xiao Li; Wang, Li Xiang

doi:10.4028/www.scientific.net/amr.807-809.521

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…283 [17] use NaOH to modify coal gangue and carry out adsorption test of methylene blue. The research indicates that the removal rate of methylene blue before the modification of coal gangue is 45.45%, and the removal rate after modification is 96.87%, NaOH modification have greatly improved the adsorption capacity of coal gangue.…”

Section: H Xu Et Al / Desalination and Water Treatment 159 (2019) 2mentioning

confidence: 99%

Effect of surface modification on quinoline adsorption onto coking coal

Xu¹,

Wang²,

Qin³

et al. 2019

Desalination and Water Treatment

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The adsorption of quinoline from simulated wastewater by raw coking coal (RCC), HCl modified coking coal (HCC) and NaOH modified coking coal (NCC) are investigated. Effects of initial concentration, adsorbent dosage, adsorption time and temperature for quinoline adsorption on coking coal are studied in batch experiments. The adsorption efficiency for quinoline increase with increasing of adsorbent dosage and adsorption time, the optimum adsorbent dosage is 50 g•L-1 , the adsorption time for quinoline adsorption on RCC, HCC and NCC is 120 mins. Kinetic experiments show that the equilibrium time for quinoline adsorption on raw and modified coking coal is 120 mins, and follow quasi-second order kinetic equation well. The adsorption isotherm data fit Freundlich models, and the adsorption capacity of quinoline on the three adsorbents increase with increasing of temperature from 288 to 313 K. HCC and NCC have a higher adsorption capacity of quinoline than RCC, because modification treatment can improve the specific surface area of RCC. Thermodynamic parameters, the Gibbs free energy change (ΔG°), Enthalpy change (ΔH°) and Entropy change (ΔS°) are calculated and the results show that the adsorption of quinoline on three adsorbents is spontaneous and endothermic. The results illustrate that modified coking coal have high potential as low-cost adsorbent for quinoline removal.

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Section: H Xu Et Al / Desalination and Water Treatment 159 (2019) 2mentioning

confidence: 99%

Effect of surface modification on quinoline adsorption onto coking coal

Xu¹,

Wang²,

Qin³

et al. 2019

Desalination and Water Treatment

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“…Mesoporous microspheres is a special morphology of ordered mesoporous materials with high adsorption capacity and combines the characteristics of mesoporous materials, which in medicine, catalysis, electromagnetism, fillers, adsorption and separation of inorganic ions, small organic molecules and biological macromolecules have certain applications [1][2][3][4][5][6][7] , but less attention to be paid in the field of adsorption of organic dyes. Organic dyes are used in people's lives more and more widely, and the complex composition of dye wastewater, great changes of water quality, deep color and high concentration the difficulty of dealing it have done great harm [8] to the environment, the treatment of dye wastewater has become a top priority. We commonly treat dye wastewater by chemical coagulation method, biochemical, electro-coagulation method and photocatalytic degradation method, but these methods need large investment, energy consumption, complex process and have difficulty popularizing.…”

Section: Introductionmentioning

confidence: 99%

Research on Adsorption of Methylene Blue onto the Mesoporous Silica Microspheres

Huang

Zhang

Qiu

et al. 2012

AMR

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Mesoporous silica microspheres (MSM) with diameter about 100 nm were prepared by hydrothermal synthesis using cetyl trimethyl ammonium bromide(CTAB) as template agent and tetraethyl orthosilicate(TEOS) as silica source. And they were characterized byscanning electron microscopy (SEM) , N2 adsorption-desorption analysis , infrared spectroscopy (FT-IR). Then methylene blue adsorption test was investigated. Effect of pH, temperature of the adsorption of methylene blue onto MSM were studied. The adsorption amount onto MSM increased with the initial pH-value of the solution in the range of 3~10. Alkaline was more favorable to adsorption. The adsorption amount onto MSM decreased with the initial temperature of the solution at 22 °C~ 45 °C. low-temperature was more favorable to adsorption. The adsorption isotherm of methylene blue on MSM could be described by the Langmuir model.

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“…There are few studies on the use of coal gangue as an adsorptive material for dye wastewater. For example, Wang Huijuan et al modified coal gangue with alkali and cooked the coal gangue and NaOH at 1:10 for 1.5 h. Their results disclosed that the modified coal gangue increased the methylene blue adsorption rate from 45.45% to 96.87% [12]. Moreover, Xie Xiaokang et al modified coal measure kaolin with hydrochloric acid and reported a good adsorption capacity of the modified kaolin, with an adsorption quantity of 244 mg•g −1 [13].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Adsorption of Methylene Blue by Acid-Modified Coal Measures Kaolin

Ren,

Shu,

Geng

et al. 2024

Processes

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In this paper, coal measure kaolin after flotation decarburization was made into an adsorbent by ball milling and acid modification to absorb methylene blue in water, achieving the treatment of waste with waste. The objective of this paper is to expand the application of coal measure kaolin, reduce its stock, and lower the raw material cost of adsorbents while treating wastewater containing methylene blue. The optimum milling time, acid boiling conditions, and adsorption conditions were investigated. Furthermore, the adsorption mechanism was investigated by kinetic calculation. The results show that the optimum milling time is 7 h. Relatively good acid modification conditions include a boiling temperature of 100 °C, a stirring time of 135 min, a stirring speed of 1000 r·min−1, and a concentration of hydrochloric acid of 8 mol·L−1. When 0.05 g of flotation kaolin adsorbent was used to adsorb the solution with pH 12 and a methylene blue concentration of 100 mg·L−1, the optimal adsorption conditions were a 38.05 °C adsorption temperature, a 160 r·min−1 stirring speed, and a 31.02 min stirring time. Under these optimal conditions, the adsorption quantity reached 39.92 mg·g−1. The adsorption process involves physical adsorption and spontaneous adsorption. The adsorption type is known as the quasi-second-order adsorption kinetic model. The adsorption form is heterogeneous adsorption in which a monolayer and a multi-molecular layer coexist.

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Adsorption Performance of Methylene Blue on Modified Coal Gangue

Cited by 3 publications

References 1 publication

Effect of surface modification on quinoline adsorption onto coking coal

Effect of surface modification on quinoline adsorption onto coking coal

Research on Adsorption of Methylene Blue onto the Mesoporous Silica Microspheres

A Study on the Adsorption of Methylene Blue by Acid-Modified Coal Measures Kaolin

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