Porous Materials Modified with Fe3O4 Nanoparticles for Arsenic Removal in Drinking Water

Puente‐Urbina, Allen; Montero-Campos, Virginia

doi:10.1007/s11270-017-3513-3

Cited by 19 publications

(6 citation statements)

References 53 publications

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“…Figure 4b represents the variation in % removal of As(III) and As(V) with the change of contact time at a constant adsorbent dose (1 g L −1 ) and initial arsenic concentration (1000 µg L −1 ). It is noted that in both cases arsenic removal increased very rapidly up to 30 min (As(III): 76%, As(V): 87%), this could be ascribed to the availability of high concentration gradient and presence of more active sites on the surface of PNHM/Fe 3 O 4 -40 40,41 . Subsequently, % removal of arsenic getting slower with the increase of contact time and finally attained equilibrium (As(III): 94%, As(V): 99%) at about 240 min.…”

Section: Effect Of the Initial Concentration Of Adsorbatementioning

confidence: 87%

Hollow Polyaniline Microsphere/Fe3O4 Nanocomposite as an Effective Adsorbent for Removal of Arsenic from Water

Dutta

Manna

Srivastava

et al. 2020

Sci Rep

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polyaniline hollow microsphere (pnHM)/fe 3 o 4 magnetic nanocomposites have been synthesized by a novel strategy and characterized. Subsequently, PNHM/Fe 3 o 4-40 (Fe 3 o 4 content: 40 wt.%) was used as an adsorbent for the removal of arsenic (As) from the contaminated water. Our investigations showed 98-99% removal of As(III) and As(V) in the presence of PNHM/Fe 3 o 4-40 following pseudo-second-order kinetics (R 2 > 0.97) and equilibrium isotherm data fitting well with Freundlich isotherm (R 2 > 0.98). The maximum adsorption capacity of As(III) and As(V) correspond to 28.27 and 83.08 mg g −1 , respectively. A probable adsorption mechanism based on X-ray photoelectron spectroscopy analysis was also proposed involving monodentate-mononuclear/bidentate-binuclear As-Fe complex formation via legend exchange. In contrast to NO 3 − and SO 4 2− ions, the presence of PO 4 3− and CO 3 2− co-ions in contaminated water showed decrease in the adsorption capacity of As(III) due to the competitive adsorption. The regeneration and reusability studies of spent PNHM/Fe 3 o 4-40 adsorbent showed ~83% of As(III) removal in the third adsorption cycle. PNHM/Fe 3 o 4-40 was also found to be very effective in the removal of arsenic (<10 μg L −1) from naturally arsenic-contaminated groundwater sample. Arsenic (As) remains one of the major sources of toxic pollutant in groundwater, affecting millions of people throughout the world. It associated into groundwater from several sources of natural and anthropogenic origins. The chronic exposure of arsenic contaminants in water beyond the World Health Organization (WHO) permissible limit (10 µg L −1) results in a serious toxicological and carcinogenic effect on human health 1. It is also widely established that the presence of arsenite [As(III)] in water is more toxic and soluble compared to arsenate [As(V)] 2,3. As a result, several technologies namely, co-precipitation, coagulation, oxidation, ion exchange, adsorption, membrane separation, etc. have been adopted for the treatment of such contaminated water 4,5. However, many conventional and other approaches are not cost-effective and environmental friendly towards arsenic removal selectivity. For example, the precipitation of iron coagulation is cost-effective; however, it generates huge amounts of sludge, leading to secondary pollution problems 6. Similarly, membrane separation exhibits high efficiency but involves high operational cost 6. In this regard, the removal of toxic pollutants from water through adsorption has been receiving considerable attention due to its sludge-free operation, cost-effectiveness, high efficiency/selectivity, ease of use, and reusability facilities 7. Several nanoparticles, such as activated carbon, carbon nanotubes, graphene, manganese oxide, zinc oxide, titanium oxide, and ferric oxides emerged as effective nanoadsorbents give better performance compared to other conventional adsorbents in removal of arsenic, phosphate, selenium and nitrite anions, and other heavy metals from drinking water 8-13. In this co...

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Section: Effect Of the Initial Concentration Of Adsorbatementioning

confidence: 87%

Hollow Polyaniline Microsphere/Fe3O4 Nanocomposite as an Effective Adsorbent for Removal of Arsenic from Water

Dutta

Manna

Srivastava

et al. 2020

Sci Rep

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“…Diatomite modified by iron oxide for arsenic removal from water was another hot topic. − Knoerr et al obtained diatomite-Fe by treating diatomite in Fe(SO 4 )·7H 2 O solution to remove trace quantities of As(III) from water. The Fe compound on diatomite was mainly ferric oxyhydroxide (lepidocrocite (α-FeOOH) and goethite (γ-FeOOH)) with fibrillary shape (Figure ).…”

Section: Adsorption Of Heavy Metals On Diatomite-based Functional Mat...mentioning

confidence: 99%

Environmental Applications of Diatomite Minerals in Removing Heavy Metals from Water

Zhao

Tian

Duan

et al. 2019

Ind. Eng. Chem. Res.

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Heavy metals released into the environment could accumulate in living organisms, thus causing various diseases and disorders. Diatomite, an eco-environmental functional material, has been proved to be a very promising and effective adsorbent in heavy metal-contaminated water treatment because of its high porosity, low density, high specific surface area, and surface silanol groups. This review (i) describes the characteristics, advantages, and limitations of diatomite; (ii) presents the capability of heavy metals adsorption onto diatomite-based functional materials; and (iii) discusses main adsorption mechanisms involved (ion-exchange, electrostatic interaction, chelation, and complexation) as well. Future studies about enhancing adsorption capacity and regeneration of diatomite-based functional materials are suggested.

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“…The low-cost and fast production of magnetic composites have gained increasing interest as filtering materials to obtain clean drinking water [32,33]. Carbon-based magnetic materials are used to remove heavy metal ions, organic dyes, and microbial contaminants from water [34,35].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted rapid synthesis of C@Fe3O4 composite for removal of microplastics from drinking water

Elmacı¹

2020

Adıyaman University Journal of Science

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Filtration is a basic requirement for the production of clean drinking water. However, filtering of large-scale drinking water is a time-consuming and costly process. Addressed herein is a new approach to the removal of microplastics, defined as dangerous organic pollutants, from water. As magnetic adsorbent, highly porous and well dispersed C@Fe3O4 composites were produced by a facile and rapid one-pot microwave synthesis method in minutes. The prepared C@Fe3O4 composites were used as an adsorbent in water contaminated with microplastics. The obtained results revealed that the microplastics adhered to the composite surface and were successfully removed from the water with an external magnet. In this point, this study provides a new approach to the rapid, effective, and low-cost removal of microplastic pollutants from drinking water.

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Porous Materials Modified with Fe3O4 Nanoparticles for Arsenic Removal in Drinking Water

Cited by 19 publications

References 53 publications

Hollow Polyaniline Microsphere/Fe3O4 Nanocomposite as an Effective Adsorbent for Removal of Arsenic from Water

Hollow Polyaniline Microsphere/Fe3O4 Nanocomposite as an Effective Adsorbent for Removal of Arsenic from Water

Environmental Applications of Diatomite Minerals in Removing Heavy Metals from Water

Microwave-assisted rapid synthesis of C@Fe3O4 composite for removal of microplastics from drinking water

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