Acid mine drainage treatment with novel high-capacity bio-based anion exchanger

Gogoi, Harshita; Leiviskä, Tiina; Rämö, Jaakko; Tanskanen, Juha

doi:10.1016/j.chemosphere.2020.128443

Cited by 15 publications

(3 citation statements)

References 35 publications

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“…38 Aminated peat was investigated as anion exchanger both in batch and column applications. 39 Sulfate initial content was 1,950 mg L -1 . The modified bio-based material showed higher sulfate uptake capacity was higher for column application (154.2 mg g -1 ) compared to the batch test (125.7 mg g -1 ).…”

Section: Ion Exchangementioning

confidence: 96%

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: 96%

Review of Sulfate Removal in Low Concentration Brine Solutions

Paulo Guilherme Freitas Melo,

Kátia Cecília de Souza Figueiredo

2024

SCE

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“…The aim of the study was to determine the optimal conditions for purification of this wastewater by a combination of a synthesized biosorbent (Gogoi et al 2019), as well as by a commercial mineral-based sorbent, brucite. The biosorbent has been reported to exhibit high sulfate removal capacity under acidic conditions (pH 2, 189.5 ± 2.7 mg/g) (Gogoi et al 2019(Gogoi et al , 2021a. The main functional groups providing binding sites for sulfate uptake onto the biosorbent are the amine and quaternary ammonium groups.…”

Section: Introductionmentioning

confidence: 99%

Removal of Sulfate and Metals from Wastewater of a Mining Enterprise by a Dual Sorbent System: A Case Study

et al. 2023

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This paper presents the results of wastewater treatment at a mining enterprise developing a complex ore deposit in the Murmansk region, Russia. The main pollutants are sulfate, manganese, and strontium. For this complex wastewater treatment, a two-stage scheme was proposed and tested using two sorbents (at a pH of 6): an aminated peat biosorbent to remove sulfate and a commercial sorbent based on the mineral brucite to remove metals. Optimal conditions were established for purifying the wastewater of sulfate and manganese and strontium ions to the level of maximum available concentrations in water bodies for fishery purposes.

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“…Alarmingly, the problem of water pollution is responsible for approximately 14,000 deaths each day, underscoring the urgent need for effective treatment technologies to eliminate harmful and toxic pollutants from wastewater. Noteworthy technologies in this realm include membrane ltration [1], [2], adsorption [3], ion exchange [4], electro-coagulation [5], precipitation [6], and electro-dialysis [7], among others. However, the application of these technologies can be economically burdensome and raises concerns, considering the growing demand for resources [8].…”

Section: Introductionmentioning

confidence: 99%

Magnetic oxide nano-porous adsorbents: a highly efficient approach for acid Fuchsin removal from medical laboratory effluents via adsorption process

Ahmed

Shwan

Agha

et al. 2023

Reac Kinet Mech Cat

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Natural clay minerals offer a straightforward and industrially e cient pathway for the large-scale production of active silica materials exhibiting diverse morphologies and functions. However, the presence of magnetic oxide nanoparticles (Fe 3 O 4 ), enriched with metal ions, generated during this process has led to their classi cation as contaminants in laboratory e uents due to their speci c adsorption of Acid Fuchsin Dye (AFD) in aqueous solutions. This study focuses on the characterization of clay minerals, particularly examining the interlayer spacing in smectites. Notably, the synthesis of Magnetic Oxide Nano-Porous Clay (MONPC) results in an approximate doubling of the speci c surface area from 10.02 to m 2 g -1 compared to natural clay. The ndings suggest a signi cant impregnation of Fe 3 O 4 within the Natural Clay (NC) matrix. The impregnated and natural clay samples were comprehensively characterized using XRD, SEM-EDS, FTIR, and N 2 adsorption-desorption techniques, con rming the presence of a porous surface structure with a high surface area. Utilizing an adsorbent concentration of 0.1 g/L, MONPC achieved complete removal of AFD from initial dye solutions with a 400 mg/L concentration which is attributed to the strong H-bonding ability of MNOPC with AFD dye as indicated by adsorption mechanism study. The adsorption capacity of AFD onto MONPC reached equilibrium within 60 to 120 minutes, with an initial pH of 9. The Pseudo-Second-Order model accurately depicted the chemisorption process of AFD adsorption, while the Freundlich isotherm model consistently provided a superior t to the data compared to the Langmuir model. Thermodynamic analysis of the MONPC adsorbent demonstrated that the adsorption process was exothermic and spontaneous, with signi cant entropic changes at the solid-liquid interface. These results suggest that the adsorption of AFD dye onto MONPC was favorable in terms of enthalpy but unfavorable in terms of entropy. Considering the high surface area and enhanced adsorption capacity of MONPC, it exhibits tremendous potential as a promising adsorbent for the removal of AFD in wastewater treatment applications.

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Acid mine drainage treatment with novel high-capacity bio-based anion exchanger

Cited by 15 publications

References 35 publications

Review of Sulfate Removal in Low Concentration Brine Solutions

Review of Sulfate Removal in Low Concentration Brine Solutions

Removal of Sulfate and Metals from Wastewater of a Mining Enterprise by a Dual Sorbent System: A Case Study

Magnetic oxide nano-porous adsorbents: a highly efficient approach for acid Fuchsin removal from medical laboratory effluents via adsorption process

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