A two-step approach for arsenic removal by exploiting an autochthonous Delftia sp. BAs29 and neutralized red mud

Biswas, Rimi; Sarkar, Angana

doi:10.1007/s11356-020-10665-8

Cited by 7 publications

(5 citation statements)

References 52 publications

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“…Primarily, arsenic contamination is caused by the usage of phosphate fertilizers, insecticides, smelting, and mining operations that release arsenic into groundwater and soil leading to severe environmental issues [112]. Water contaminated with arsenic poses a major threat to human health and aquatic organisms in numerous regions of the world [4]. Both ground and surface water contain arsenic contamination that in turn affects human health and aquatic organisms worldwide.…”

Section: Arsenic As a Contaminantmentioning

confidence: 99%

“…Adsorption capacities were found to be 121.5 for As(III) and 80.0 mgg −1 for As(V) at pH 7. Generally, water contains other ions like Ca 2+ , Mg 2+ , PO 4 3− , etc., and there is a chance of interference from these ions during adsorption, resulting in a decreased adsorption efficiency. However, these ions didn't show any interference to affect the removal efficiency and selectivity of arsenic for this hybrid MOF.…”

Section: Metal Organic Framework As An Adsorbentmentioning

confidence: 99%

“…9 [36]. Batch-wise experiments were carried for the elimination of heavy metals at different pH (1)(2)(3)(4)(5)(6). The removal rate of Zn-MOF for hazardous metal ions is less at lower pH, and the maximum uptake was 718 mgg −1 for AsO 4 3− (50 mgL −1 ).…”

Section: Metal Organic Framework As An Adsorbentmentioning

confidence: 99%

“…Fig 4. Structure of a metal organic framework comprising of organic ligands, functional groups, pore space, and metal ions.…”

mentioning

confidence: 99%

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Metal Organic Frameworks to Remove Arsenic Adsorption from Wastewater

Rajasekaran

Devi

Pinheiro

et al. 2021

Inorganic-Organic Composites for Water and Wastewater Treatment

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Water is an integral part of life on earth. Rapid industrialization, urbanization, and population explosion have all contributed to the pollution of ground and surface water with, among other things, heavy metals. This has led to an acute shortage of clean drinking water. Arsenic is one of the most toxic heavy metals found in water, posing a serious threat to the environment, human beings, and aquatic life. Over the years, a considerable amount of research has been directed toward the elimination of arsenic from water via sustainable methodologies. Metal organic frameworks are a class of materials possessing exceptional features like chemical stability, high porosity, multiple functional groups, and large surface areas. These properties can be effectively channelized to make metal organic frameworks excellent adsorbents for the removal of arsenic from contaminated water and make it drinkable. We have reviewed herein, the problems of heavy metal contamination, specifically the different forms of arsenic that pollute water. The importance of metal organic frameworks and the progress made in the synthesis of materials having a metal oxide framework have been discussed. Significant properties like adsorption and mechanistic aspects of adsorption through metal organic frameworks have been described. Furthermore, the characterization of the electronic and geometric aspects

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Section: Arsenic As a Contaminantmentioning

confidence: 99%

Section: Metal Organic Framework As An Adsorbentmentioning

confidence: 99%

Section: Metal Organic Framework As An Adsorbentmentioning

confidence: 99%

“…Fig 4. Structure of a metal organic framework comprising of organic ligands, functional groups, pore space, and metal ions.…”

mentioning

confidence: 99%

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Metal Organic Frameworks to Remove Arsenic Adsorption from Wastewater

Rajasekaran

Devi

Pinheiro

et al. 2021

Inorganic-Organic Composites for Water and Wastewater Treatment

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“…It is worth noting that raw red mud has lower arsenic adsorption capacity compared to modified red mud or synthesized iron oxides/hydroxides as adsorbents. Numerous researchers have reported using modified red mud to successfully remove arsenic from an aqueous solution. − Recently, Xu et al reported arsenic removal from aqueous solution using porous red mud beads …”

Section: Introductionmentioning

confidence: 99%

Low Temperature Processing of Iron Oxide Nanoflakes from Red Mud Extract toward Favorable De-arsenification of Water

2023

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Iron oxide (α-Fe2O3) was synthesized from red mud extract followed by hydrothermal reaction at 150 °C/6–24 h in the presence of NH4OH. The crystallinity of α-Fe2O3 increased with reaction time as confirmed by X-ray Diffraction, while Fourier transform infrared spectroscopy and Raman illustrate the symmetric stretching vibration of the Fe–O bond in α-Fe2O3. The X-ray photoelectron spectroscopic analysis shows O 1s spectra at 530.6, 531.2, and 532 eV, signifying the lattice oxygen in Fe–O, surface oxygen defects, and oxygen in adsorbed hydroxyl groups, respectively. The morphology of α-Fe2O3 nanoflakes was noticed from field emission scanning electron microscopy and transmission electron microscopy. The developed particles reveal the BET surface area in the range of 136–347 m2/g. The maximum As(V) adsorption capacity of 32–41 mg/g was obtained for adsorbent dose of 0.25 g/L. The arsenic level could be lowered down to 2–3 μg/L (<10 μg/L as per WHO’s limit) with contaminated real water (64 μg/L) using 0.25 g/L of sample dose within 5 min of adsorption.

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