Removal of sulfate from wastewater via synthetic Mg–Al layered double hydroxide: An adsorption, kinetics, and thermodynamic study

Rahman, Matlubur; Kameda, Tomohito; Miura, Tatsuya; Kumagai, Seiji

doi:10.1016/j.jics.2021.100185

Cited by 13 publications

(4 citation statements)

References 47 publications

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“…The best results obtained for sulfate removal were 135.14 and 92.59 mg g -1 for LDH with Mg 2+ /Al 3+ molar ratios of 2:1 and 4:1, respectively. 37 Even presenting relevant results, the process of ion exchange is limited in terms of selectivity and ability to remove sulfate ions, making it difficult to implement as a primary method of treatment. 38 Aminated peat was investigated as anion exchanger both in batch and column applications.…”

Section: Ion Exchangementioning

confidence: 99%

Review of Sulfate Removal in Low Concentration Brine Solutions

Paulo Guilherme Freitas Melo,

Kátia Cecília de Souza Figueiredo

2024

SCE

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Sulfate is a common ion present in natural water bodies at low concentrations and as effluent in different metallurgical processes. The discharge of sulfate in rivers and waterbodies can cause direct and indirect damage to the environment. Regulatory agencies have been increasing the constraints in sulfate content limit for discharge focused on human equity and environmental protection. A common practice is the precipitation of sulfate with lime, but the remaining solution still has ca. 1,500 mg L-1 of sulfate, which is not acceptable for disposal or reuse. This work describes the main routes for sulfate removal such as chemical precipitation, biological degradation, ion exchange, and separation through membranes and discusses the main advantages and issues of each approach. One of the main challenges is to scale up the tests and show the performances at the industrial level. The subject must be the focus of constant study to obtain relevant results so that usual technologies are replaced by more innovative, cheap and efficient methods.

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Section: Ion Exchangementioning

confidence: 99%

Review of Sulfate Removal in Low Concentration Brine Solutions

Paulo Guilherme Freitas Melo,

Kátia Cecília de Souza Figueiredo

2024

SCE

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“…After 30 min, the adsorption rates of both PTB-LDOs decreased gradually, and finally both of them reached the adsorption equilibrium at around 150 min. In order to clarify the adsorption mechanism of PTB-LDO3 and PTB-LDO4 prepared in this work, and to understand the controlling factors in the adsorption process, we used pseudo-first-order kinetics and pseudo-second-order kinetics to fit two adsorption capacity-time curves to judge the characteristics of adsorption behav-ior [34,35]. The models of first-order and second-order dynamics conform to the following two equations.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Removal of Fluoride from Phosphogypsum Leaching Solution with Phosphate Tailing Based Layered Double Hydroxides: Kinetics and Equilibrium Isotherms

Liu

Zhang

Xiao³

et al. 2022

Minerals

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In this work, ternary and quaternary layered double oxides (PTB-LDO3 and PTB-LDO4) based on phosphate tailings were synthesized by the coprecipitation method. The as-prepared samples were characterized and applied to remove fluorine ions from a phosphogypsum leaching solution. The results indicated that both the precursor of PTB-LDO3 and PTB-LDO4 showed a layered structure with characteristic diffraction peaks of hydrotalcite. Compared with PTB-LDO4, PTB-LDO3 exhibited better adsorption performance at pH 5–6 and a dosage of 0.04 mg L−1. The adsorption kinetics results revealed that the adsorption of fluorine by PTB-LDO3 and PTB-LDO4 reached the adsorption equilibrium in about 3 h, and followed the pseudo-second-order model. The adsorption data could be fitted better with the Langmuir isotherm with the maximum adsorption amounts of 26.03 mg g−1 and 15.66 mg g−1 for PTB-LDO3 and PTB-LDO4, respectively. The adsorption of fluorine by PTB-LDO3 and PTB-LDO4 were both spontaneous and exothermic, and exhibited excellent reusability and stability. This study provides a possibility for the combined treatment of phosphorus chemical solid waste (phosphorus tailings) and phosphorus chemical wastewater (phosphogypsum leaching liquid).

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“…MG has been linked to immune and reproductive system disruptions, as well as kidney failure (Kavci, 2021) . Various technologies exist for removing dyes from textile wastewater, including degradation under visible light (Jabeen et al, 2023) , membrane (Raval et al, 2022) , biodegradation (Cheng et al, 2021) , chemical oxidation (Al-Balawi et al, 2023) , and ad-sorption (Rahman et al, 2021) . The adsorption process is particularly advantageous due to its simplicity, effectiveness, efficiency, and cost-effectiveness (Palapa et al, 2023;Thotagamuge et al, 2021;Wu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization Fe3O4/Humic Acid for the Efficient Removal of Malachite Green

Ahmad,

Zahara,

Wijaya

et al. 2023

Sci. Technol. Indones

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The dye pollutants that contaminate water and food resulting from commercial manufacture and illicit addiction are a worldwide threat that harms the ecosystem, the food supply, and the health of humans. Magnetite/Fe3O4 humic acid (MHA) with various ratios was synthesized using a two-step process involving coprecipitation and hydrothermal treatment in order to effectively overcome these obstacles. Analyses of SEM, XRD, FTIR, and VSM were used to describe the morphology and physicochemical aspects of MHA. The adsorption kinetics studies indicated that the adsorption mechanism of malachite green adhered to the pseudo-second-model and that the adsorption was adequately described by the Langmuir isotherm. The thermodynamic studies demonstrated spontaneous, endothermic, disorderly adsorption. MHA2 had maximal malachite green adsorption capacities of 83.333 mg/g. Malachite green and MHA may interact via interaction, electrostatic attraction, van der Waals forces, H-bonding, pore filling, pore locking, and/or mechanical adhesion; however, physisorption dominates the adsorption process. Malachite green's adsorption characteristics change significantly after up to four cycles. It has been demonstrated that MHA has a high capacity for dye adsorption and a broad range of potential applications.

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Removal of sulfate from wastewater via synthetic Mg–Al layered double hydroxide: An adsorption, kinetics, and thermodynamic study

Cited by 13 publications

References 47 publications

Review of Sulfate Removal in Low Concentration Brine Solutions

Review of Sulfate Removal in Low Concentration Brine Solutions

Removal of Fluoride from Phosphogypsum Leaching Solution with Phosphate Tailing Based Layered Double Hydroxides: Kinetics and Equilibrium Isotherms

Fabrication and Characterization Fe3O4/Humic Acid for the Efficient Removal of Malachite Green

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