Adsorption of phenol, phosphate and Cd(II) by inorganic–organic montmorillonites: A comparative study of single and multiple solute

Ma, Longlong; Zhu, Jianxi; Xi, Yunfei; He, Hongping; Ayoko, Godwin A.

doi:10.1016/j.colsurfa.2016.02.032

Cited by 44 publications

(10 citation statements)

References 41 publications

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“…Ma et al [ 87 ] used inorganic–organic montmorillonites (IOMts) obtained by modifying polyhydroxy-aluminium (Al 13 )-pillared montmorillonite (AlPMt) with a cationic surfactant (C16) and a zwitterionic surfactant (Z16). Analysis of the phosphorus adsorption process using these materials showed that, for concentrations in the 20–140 mg P/L range and a solution with a pH of 5.0, the sorption capacity ranged between 10.07 and 13.04 g P/kg, depending on the type of modification [ 87 ].…”

Section: Synthesized and Waste Materials And Their Modificationsmentioning

confidence: 99%

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

et al. 2020

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Modern technologies designed to treat wastewater containing phosphorus compounds are based on the processes of adsorption and precipitation. In addition, more environmentally friendly and cheaper materials are being sought to ensure greater conformity with overarching assumptions of green chemistry and sustainable development. Against that background, this paper offers a review and analysis of available information on the considered reactive materials that have the capacity to remove phosphorus from wastewater. These materials are categorised as natural (with a sub-division in line with the dominant sorption groups of Al/Fe or Ca/Mg), waste, or man-made. Notably, most studies on sorbents have been carried out in laboratory systems via experimentation under static conditions. Among the natural materials, opoka has the highest sorption capacity of 181.20 g P/kg, while red mud (in the waste material category) is most efficient at binding phosphorus with a level of 345.02 g P/kg. Finally, among the group of commercial materials, Rockfos® has the highest sorption capacity of 256.40 g P/kg. In addition, this paper recognises the effect of composition, pH, and physical properties on a reactive material’s capacity to absorb phosphorus, as well as the possibility for further potential use in the production of fertilisers.

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Section: Synthesized and Waste Materials And Their Modificationsmentioning

confidence: 99%

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

et al. 2020

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“…Properties of clays depend strictly on the crystal chemical feature of the clay minerals of which they are composed. However, due to their cation exchange capacity, low cost, and high availability clays were often considered to study the interaction mechanisms with various organic and inorganic pollutants [20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31].…”

Section: Introductionmentioning

confidence: 99%

Kinetic, isotherm and mechanism investigations of the removal of phenols from water by raw and calcined clays

Ouallal

Dehmani

Moussout

et al. 2019

Heliyon

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In this work, the phenols removal of phenol from water by raw clay (RCG) and calcined one at 1000 °C (CCG) of Goulmima city (Morocco) was investigated. The kinetics and isotherms experiments were also studied at pH = 4. The results indicated that the phenol adsorption reached equilibrium within 3 h, and the removal of phenol was enhanced at the same temperature by CCG (2.932 mg/g) adsorbent, compared to RCG (1.640 mg/g) due to the removal of organic matter by heat treatment, and an increase in adsorption temperature, indicating the endothermic process. The adsorbents were characterized by means of X-ray fluorescence, FTIR, XRD, B.E.T, and TGA/DTA analysis and showed that the clay consists essentially of silica and alumina. The experimental data were examined by using linear and nonlinear forms of the kinetics and the isotherms models. Based on the errors of the calculated values of R 2 (Coefficient of determination), χ 2 (Chi-square) and standard deviation (Δq (%)), it was found that the nonlinear forms of second-order kinetic model and Freundlich and Redlich-Peterson (R–P) isotherm models are best fit the experimental data for both adsorbents. However, the enthalpy ΔH° is less than 20 kJ/mol and the free energy ΔG° has a negative value, which shows that the adsorption is done physically and spontaneously on heterogeneous sites. The interest of this study is the use of FTIR and XRD to determine the effect of calcination on the phenol adsorption mechanism. However, the analysis of both adsorbents, before and after adsorption of phenol, shows that the adsorption mechanism of phenol is provided by the hydrogen bonding of the water molecules.

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“…Hg 2+ ion is one of the most prevalent forms of mercury species in environmental waters 2 , 3 , which can further transform into the more toxic methylmercury by microbial methylation 4 , 5 . Hg 2+ ion can accumulate in animal and human bodies through food chains 6 , with a high enrichment factor, and then affect the nerves, immune, and digestive systems and cause serious damage of kidney, liver, and brain 7 , 8 . Hence, there is a great need to develop a simple and rapid method for detection of trace Hg 2+ ion in water.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of AO/LDH fluorescence composite and its detection of Hg2+ in water

Mei

et al. 2017

Sci Rep

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Divalent mercury ion (Hg2+) is one of the most common pollutants in water with high toxicity and significant bioaccumulation, for which sensitive and selective detection methods are highly necessary to carry out its detection and quantification. Fluorescence detection by organic dyes is a simple and rapid method in pollutant analyses and is limited because of quenching caused by aggregation dye molecules. Hydrotalcite (LDH) is one of the most excellent carrier materials. In this study, an organic dye acridine orange (AO) was successfully loaded on the LDH layers, which significantly inhibited fluorescence quenching of AO. The composite AO/LDH reaches the highest fluorescence intensity when the AO initial concentration is 5 mg/L. With its enhanced fluorescent property, the composite powder was fabricated to fluorescence test papers. The maximal fluorescence intensity was achieved with a pulp to AO/LDH ratio of 1:5 which can be used to detect Hg2+ in water by naked eyes. Hg2+ in aqueous solution can be detected by instruments in the range of 0.5 to 150 mM. The novelty of this study lies on both the development of a new type of mineral-dye composite material, as well as its practical applications for fast detection.

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Adsorption of phenol, phosphate and Cd(II) by inorganic–organic montmorillonites: A comparative study of single and multiple solute

Cited by 44 publications

References 41 publications

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

Reactive Materials in the Removal of Phosphorus Compounds from Wastewater—A Review

Kinetic, isotherm and mechanism investigations of the removal of phenols from water by raw and calcined clays

Fabrication of AO/LDH fluorescence composite and its detection of Hg2+ in water

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