Arsenite removal in groundwater treatment plants by sequential Permanganate―Ferric treatment

Arslan, Ahmad; Cornelissen, Emile; Wetering, S. van de; Dijk, Tim van; Genuchten, Case M. van; Bundschuh, Jochen; Wal, A. van der; Bhattacharya, Prosun

doi:10.1016/j.jwpe.2018.10.014

Cited by 55 publications

(9 citation statements)

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“…20 These concentrations are of concern, especially because the World Health Organization provisional limit for As in drinking water is 10 μg L −1 , 19 and target concentrations are even lower in some countries (e.g., Denmark, 5 μg L −1 ; 21 the Netherlands, 1 μg L −1 ). 22,23 GR phases are among the most effective Fe (oxyhydr)oxides for As sequestration under anoxic conditions and circumneutral to slightly alkaline pH. 24 We have shown that synthetic GR sulfate can adsorb up to 160 mg As(III) and 105 mg of As(V) per g solid and that geochemical factors such as pH, ionic strength, and the presence of coexisting ions can greatly affect the As uptake.…”

Section: ■ Introductionmentioning

confidence: 96%

“…Among the most toxic oxyanions, arsenic (As) is often found in high concentrations in drinking and groundwaters, where it poses a significant global environmental and public health concern. , Concentration of As in contaminated natural waters can be as high as 5000 μg L –1 , while that in mining-influenced environments (e.g., groundwaters affected by mine drainage) can reach up to 850 000 μg L –1 . These concentrations are of concern, especially because the World Health Organization provisional limit for As in drinking water is 10 μg L –1 , and target concentrations are even lower in some countries (e.g., Denmark, 5 μg L –1 ; the Netherlands, 1 μg L –1 ). , …”

Section: Introductionmentioning

confidence: 99%

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Direct Visualization of Arsenic Binding on Green Rust Sulfate

Perez

Freeman

Brown

et al. 2020

Environ. Sci. Technol.

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Metrics & MoreArticle Recommendations * sı Supporting Information ABSTRACT: "Green rust" (GR), a redox-active Fe(II)−Fe(III) layered double hydroxide, is a potential environmentally relevant mineral substrate for arsenic (As) sequestration in reduced, subsurface environments. GR phases have high As uptake capacities at circumneutral pH conditions, but the exact interaction mechanism between the GR phases and As species is still poorly understood. Here, we documented the bonding and interaction mechanisms between GR sulfate and As species [As(III) and As(V)] under anoxic and circumneutral pH conditions through scanning transmission electron microscopy (STEM) coupled with energy-dispersive X-ray (EDX) spectroscopy and combined it with synchrotron-based X-ray total scattering, pair distribution function (PDF) analysis, and As K-edge Xray absorption spectroscopy (XAS). Our highly spatially resolved STEM−EDX data revealed that the preferred adsorption sites of both As(III) and As(V) are at GR crystal edges. Combining this data with differential PDF and XAS allowed us to conclude that As adsorption occurs primarily as bidentate binuclear ( 2 C) innersphere surface complexes. In the As(III)-reacted GR sulfate, no secondary Fe−As phases were observed. However, authigenic parasymplesite (ferrous arsenate nanophase), exhibiting a threadlike morphology, formed in the As(V)-reacted GR sulfate and acts as an additional immobilization pathway for As(V) (∼87% of immobilized As). We demonstrate that only by combining highresolution STEM imaging and EDX mapping with the bulk (differential) PDF and extended X-ray absorption fine structure (EXAFS) data can one truly determine the de facto As binding nature on GR surfaces. More importantly, these new insights into As−GR interaction mechanisms highlight the impact of GR phases on As sequestration in anoxic subsurface environments.

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Section: ■ Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Direct Visualization of Arsenic Binding on Green Rust Sulfate

Perez

Freeman

Brown

et al. 2020

Environ. Sci. Technol.

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“…[4] Tehnik emulsi membran cair telah banyak diaplikasikan untuk beberapa penelitian, misalnya ekstraksi logam kadmium. [5,6] tembaga. [7,8,9,10,11] timbal [12,13,14,15,16,17,18], kromium [19], kobal [20,21], arsen [22], ekstraksi dan pemisahan Penisilin G [23] .…”

Section: Pendahuluanunclassified

Pengaruh Tembaga(II) dan Kadmium(II) Terhadap Persen Ekstraksi Merkuri(II) Menggunakan Emulsi Membran Cair Tipe W/O Bersurfaktan Ganda dengan Benzoil Aseton Sebagai Pembawa Kation

2017

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A study of the effect of copper (II) and cadmium (II) on mercury (II) extraction percent using a fluorescent w / o liquid membrane emulsion with benzoyl acetone as a cation carrier was used. The optimum conditions used in this study are as follows. The emulsion was made using a mixture of surfactant span-80 & span-20 = 2%, emulsification rate = 2000 rpm for 10 min, internal phase membrane phase / phase ratio = 1, HNO3 concentration in internal phase = 2M. Extraction was performed on 30 ppm mercury as external phase with pH = 2 and extraction rate 300 rpm for 10 min and the ratio of phase volume of external / emulsion = 7, The result showed that mercury extraction (II) with liquid membrane emulsion, relatively selective to copper (II) and cadmium (II). The results also showed that the presence of copper (II) and cadmium (II) to 30 ppm, decreased mercury (II) percentage of 12.12% and 11.74%, respectively.

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“…Potassium permanganate (KMnO 4 ) is a highly strong oxidizing agent that is commonly used for water purification from numerous pollutants, mainly for the destruction of compounds that cause undesirable taste, odor, and color for the treated water 1 . Remarkably, permanganate is still one of the most oxidizing chemicals ever applied to remove each iron, manganese, and arsenic from water 2 , 3 , In addition to its great ability to oxidize cyanide, phenols, and organic compounds 4 – 8 .…”

Section: Introductionmentioning

confidence: 99%

Potassium permanganate dye removal from synthetic wastewater using a novel, low-cost adsorbent, modified from the powder of Foeniculum vulgare seeds

Bani-Atta

2022

Sci Rep

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In this study, Seeds powder of Foeniculum vulgare was used to prepare a novel adsorbent, the modification of the prepared adsorbent was done by each of ZnCl2, oxalic acid, and CuS, all samples have been characterized by different techniques and examined for Potassium permanganate (KMnO4) adsorption. Among the four modified and unmodified adsorbents, the sample modified by oxalic acid has the highest percentage removal for KMnO4 adsorption (%R = 89.36). The impact of KMnO4 concentration, adsorbent dose, contact temperature, contact time, and solution pH on the adsorption performance was also investigated. The experimental data of this adsorption was analyzed by different kinetic and isotherm models. As Constants of thermodynamic ΔG°, ΔH°, and ΔS° have been also evaluated. Surface area, pore volume, and pore size of the modified oxalic acid F. vulgare seeds powder adsorbent were determined as 0.6806 m2 g−1, 0.00215 cm3 g−1, and 522.063 Å, as pHZPC also was stated to be 7.2. The R2 values obtained from applying different isotherm and kinetic models (0.999 and 0.996) showed that the adsorption performance of KMnO4 follows the Langmuir and Pseudo 2nd order models. Furthermore, high adsorption capacities of 1111.11, 1250.00, and 1428.57 mg g−1 were achieved at three temperatures that were used in this study. Constants of thermodynamic ΔG°, ΔH°, and ΔS° values indicate chemical and spontaneous adsorption at the adsorbent surface. Therefore, the modified adsorbent can be used to remove KMnO4 dye from pollutant water samples.

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Arsenite removal in groundwater treatment plants by sequential Permanganate―Ferric treatment

Cited by 55 publications

References 55 publications

Direct Visualization of Arsenic Binding on Green Rust Sulfate

Direct Visualization of Arsenic Binding on Green Rust Sulfate

Pengaruh Tembaga(II) dan Kadmium(II) Terhadap Persen Ekstraksi Merkuri(II) Menggunakan Emulsi Membran Cair Tipe W/O Bersurfaktan Ganda dengan Benzoil Aseton Sebagai Pembawa Kation

Potassium permanganate dye removal from synthetic wastewater using a novel, low-cost adsorbent, modified from the powder of Foeniculum vulgare seeds

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