Iron oxide and its modified forms as an adsorbent for arsenic removal: A comprehensive recent advancement

Siddiqui, Sharf Ilahi; Chaudhry, Saif Ali

doi:10.1016/j.psep.2017.08.009

Cited by 279 publications

(85 citation statements)

References 240 publications

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“…6d shows the appearance of two peaks in XPS spectra of As 3d due to the presence of both As(III) (~43.70 eV) and As(V) (~44.40 eV) and their content corresponding to ~42.02 and 57.98%, respectively 13,51 . These findings further strengthen the fact that Fe 3+ present in PNHM/Fe 3 O 4 -40 plays an imperative role in oxidizing As(III) (more toxic) to As(V) (less toxic), followed by adsorption 51,66 .…”

supporting

confidence: 70%

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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supporting

confidence: 70%

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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“…Sodium (meta) arsenite was used to obtain As(III) solutions (2,5,10,20, and 40 mg/L) that were prepared in deionized water and adjusted at pH 2 and 8, respectively. For adsorption experiments, 0.4 g/L of manganese ferrite NPs were placed in polyethylene bottles of 30 mL to add 10 mL of arsenic solution.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…Last are statements supported by successful arsenic removal from water using iron oxide NPs such as magnetite [9][10][11], mixed magnetite/maghemite [12], hematite [13,14], manganese/cobalt ferrite [15,16], nickel ferrite [17], and magnetic composites [6,18]. Therein, efforts have been constantly done toward the functionalization of magnetic materials in order to obtain nanocomposites with an enhanced adsorption capacity of aqueous arsenic species [19][20][21][22][23][24]. Furthermore, as the mechanism of the adsorption process is not yet fully understood, adsorption studies using ferrite NPs are mainly focused in thermodynamics and the mechanisms of arsenic adsorption on the NPs surface, highlighting the redox reactions over the proposed surface complex formation [2,11,25].…”

Section: Introductionmentioning

confidence: 99%

Linear and nonlinear kinetic and isotherm adsorption models for arsenic removal by manganese ferrite nanoparticles

et al. 2019

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In the present work, we analyzed the linear and nonlinear model suitabilities for adsorption data from aqueous As(III) removal by manganese ferrite nanoparticles (NPs). Hence, As(III) adsorption onto ferrite NPs was formerly analyzed by the intraparticle diffusion model (IPD). Then, adsorption kinetics was described by the pseudo-first-order (PFO), pseudosecond-order (PSO), and Elovich models, while equilibrium adsorption was fitted to the Freundlich and Langmuir isotherms. Linear and nonlinear kinetic and isotherm models were solved and compared. The nonlinear data fitting was applied through the lsqcurvefit user-defined function (Matlab ver. 7.10.0). The initial adsorption rate was influenced by intraparticle diffusion and surface or film diffusion from the arsenic bulk solution to ferrite NPs, according to the IPD model. Adsorption kinetics of As(III) on manganese ferrite NPs was better described by the PSO model, followed by the Elovich model and then the PFO model. Equilibrium adsorption data were only worthily described by the Freundlich isotherm model. While the PSO, Elovich and Freundlich linear models showed even better fit than the nonlinear models, determinant bias was depicted for the PFO and Langmuir linear models. Thus, to use nonlinear adsorption models is highly advisable, having the Matlab lsqcurvefit function been proven very useful to face such task.

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“…When developing cheap sorption materials, particular attention is paid to various iron compounds (oxides, hydroxides and oxyhydroxides) [13,14], which is caused by the high adsorption tendency of the latter to remove arsenic. However, along with their efficiency and cheapness, they have a significant drawback -high dispersion, which complicates the separation of solid and liquid phases when used in water purification sorption technologies [15,16]. Therefore, it is advisable to ferment the iron-containing compounds on different substrates, which significantly improves the processability of sorption processes.…”

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

Obtaining of iron-containing silicate composites for contaminated water purification from arsenic compounds

Бондарєва

Тобілко

Kholodko

et al. 2019

TAPR

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Об'єктом дослідження є палигорськіт-природний глинистий мінерал шарувато-стрічкової структури. Для нього характерною є висока питома поверхня, вторинна поруватість та сорбційна здатність щодо катіонів металів. Проте, за рахунок негативного заряду поверхні, палигорськіт є неефективним при очищенні вод від забруднення, що знаходяться в аніонній формі, зокрема, від сполук арсену. Суттєвим недоліком використання дисперсних алюмосилікатів в якості сорбентів є складність їх відділення від рідкої фази після процесу сорбційного очищення. Тому авторами для підвищення сорбційних властивостей палигорськіту щодо забруднювачів, які знаходяться у водному середовищі в формі аніонів, було використано метод модифікування його поверхні ферумвмісними сполуками, що включає в себе обробку підготовленого палигорськіту солями заліза(ІІІ) в слабко лужному середовищі. В роботі використовувалися фізико-хімічні методи дослідження структури модифікованих та вихідних зразків палигорськіту, зокрема, метод інфрачервоної спектроскопії (ІЧ-спектроскопії) та метод низькотемпературної адсорбції-десорбції азоту. Отримані результати вказують на те, що поверхня палигорськіту вкрита сполуками заліза(ІІІ), що привело до підвищення питомої поверхні з 213 м 2 /г до 275 м 2 /г та розміру пор з 1,9 нм до 2,25 нм. Одержані зразки відрізняються від вихідного мінералу підвищеною сорбційною здатністю по відношенню до сполук арсену(V). Величина максимальної сорбції арсену модифікованим зразком становить 7,8 мг/г, що значно перевищує таку для природного палигорськіту-0,2 мг/г. Показано, що вилучення арсену ферумвмісним силікатом відбувається достатньо швидко і не залежить від величини рН водного середовища в діапазоні 3-8. Це пов'язано з тим, що при обробці поверхні палигорськіту оксигідроксидами заліза, останній набуває підвищеної реакційної здатності за рахунок збільшення кількості активних сорбційних центрів. Ключові слова: сорбція арсену, очищення води, оксигідроксиди заліза, глинисті мінерали, модифікування поверхні.

show abstract

Iron oxide and its modified forms as an adsorbent for arsenic removal: A comprehensive recent advancement

Cited by 279 publications

References 240 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

Linear and nonlinear kinetic and isotherm adsorption models for arsenic removal by manganese ferrite nanoparticles

Obtaining of iron-containing silicate composites for contaminated water purification from arsenic compounds

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