Sorption/desorption differences among three ferrihydrites prepared by different synthesis methods

Meng, Shuangming; Liu, Hui; Yang, Chao; Wei, Yu Jhe; Hou, Denglu

doi:10.1016/j.apsusc.2012.01.004

Cited by 13 publications

(8 citation statements)

References 22 publications

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“…Similarly, a single application of ferrihydrite could not enhance the stability of lead immobilized in acidic to alkaline pH conditions, although it could Environmental Technology alter the lead and antimony phases to more stable ones and reduce the levels of both elements. In addition, the amounts of lead sorption by ferrihydrite range from 32.4 to 55.6 mg g −1 , [15,18] significantly lower than the values for hydroxyapatite, [35] suggesting that a large amount of ferrihydrite is required to immobilize lead in shooting range soil. For example, the required amount of ferrihydrite to immobilize all lead phases in the soil used in this study was calculated to be 462 g kg −1 for a lead sorption capacity of ferrihydrite of 50 mg g −1 .…”

Section: Simultaneous Lead and Antimony Immobilization By The Combinementioning

confidence: 82%

“…[14] Iron hydrous oxide material can sorb heavy metals and metalloids, forming inner-and outer-sphere complexes with the surface hydroxyl groups of the material. [15][16][17][18][19][20] However, the level of sorption by iron hydrous oxide material depends on the type of element and the net electric charge of the material surface, which varies with the solution pH. Thus, the reaction of heavy metals with iron hydrous oxide material is a tradeoff with that of metalloids, because anions can be easily sorbed under acidic pH conditions while cations cannot be sorbed.…”

Section: Introductionmentioning

confidence: 96%

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Simultaneous lead and antimony immobilization in shooting range soil by a combined application of hydroxyapatite and ferrihydrite

Ogawa

Katoh

Sato

2015

Environmental Technology

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This study investigated whether a combined application of hydroxyapatite and ferrihydrite could immobilize lead and antimony in shooting range soil in which the level of lead contamination is markedly higher than that of antimony. In addition, we evaluated the stability of lead and antimony immobilized by the combined application with varying soil pH. The levels of water-soluble lead and antimony for the combined application were lower than those of single applications of hydroxyapatite or ferrihydrite, indicating that the combined application could suppress the levels of water-soluble lead and antimony by 99.9% and 95.5%, respectively, as compared with the levels in shooting range soil without immobilization material. The amounts of residual lead and amorphous Fe/Al oxide-bound antimony fractions in sequential extraction increased with a decrease in the exchangeable and carbonate lead fractions as well as in non-specifically bound and specifically bound antimony fractions. The alteration of lead and antimony phases to chemically more stable ones as a result of the combined application would result in the suppression of their mobility. The stability of immobilized lead and antimony in the combined application was equal to that of lead with a single application of hydroxyapatite and that of antimony with a single application of ferrihydrite within neutral to alkaline pH conditions, respectively. Therefore, this study suggests that the combined application of hydroxyapatite and ferrihydrite can simultaneously immobilize lead and antimony in shooting range soil with neutral to alkaline pH.

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Section: Simultaneous Lead and Antimony Immobilization By The Combinementioning

confidence: 82%

Section: Introductionmentioning

confidence: 96%

Simultaneous lead and antimony immobilization in shooting range soil by a combined application of hydroxyapatite and ferrihydrite

Ogawa

Katoh

Sato

2015

Environmental Technology

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“…5b) [46]. In the case of Zeolite and nZVI, pH which indicates that the Pb 2+ sorption process promotes the release of OH − , whereas in the case of Mt, a diminished pH is obtained as a consequence of the Pb 2+ sorption [46].…”

Section: Removal Studiesmentioning

confidence: 94%

“…In the case of composites, an increase of the pH and surface charge is observed, and therefore the Pb 2+ is mainly absorbed as a bindetate-mononuclear complex, which is a structure less suitable for desorption [46][47][48]. …”

Section: Removal Studiesmentioning

confidence: 97%

Nanoscale zero valent supported by Zeolite and Montmorillonite: Template effect of the removal of lead ion from an aqueous solution

Arancibia‐Miranda

Baltazar

García

et al. 2016

Journal of Hazardous Materials

243

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“…Ferrihydrite (Fh) has significant retention effects on the migration of contaminants in both anionic and cationic forms due to its properties like small particle size, large specific surface area and high value of the point of zero charge (pH PZC ∼8.0) (Meng et al, 2012;Kumar et al, 2014;Hu et al, 2019). In an acidic and neutral medium, at pH < 8.0, its surface is positively charged and in a basic medium, at pH > 8.0, the surface has a negative charge (Ajouyed et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions

Dzieniszewska

Kyzioł-Komosińska

Pająk

2020

PeerJ

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The adsorption behavior of Cr(III) and Cr(VI) ions onto laboratory-synthesized 2-line ferrihydrite was investigated under a batch method as a function of initial chromium concentration (0.1–1000 mg L−1) and pH (3.0 and 5.0). Moreover, the effect of the type of anion (chloride and sulfate) on Cr(III) adsorption was studied. The affinity of Cr(III) ions for the ferrihydrite surface depended on both the type of anion and pH of the solution and the maximum adsorption capacities decreased as follows: q (SO42−, pH 5.0) > q (SO42−, pH 3.0) > q (Cl−, pH 5.0) > q (Cl−, pH 3.0), and were found to be 86.06 mg g−1, 83.59 mg g−1, 61.51 mg g−1 and 40.67 mg g−1, respectively. Cr(VI) ions were bound to ferrihydrite in higher amounts then Cr(III) ions and the maximum adsorption capacity increased as the pH of the solution decreased and was 53.14 mg g−1 at pH 5.0 and 83.73 mg g−1 at pH 3.0. The adsorption process of Cr species was pH dependent, and the ions were bound to the surface of ferrihydrite by surface complexation. The Sips isotherm was the best-fit model to the results obtained from among the four isotherm models used, i.e., Freundlich, Langmuir, Dubinin-Radushkevich and Sips, indicating different adsorption centers participate in Cr uptake. In order to assess the bonding strength of the adsorbed chromium ions the modified BCR procedure, dedicated to the samples with a high iron content, was used. The results of the sequential extraction showed that Cr(III) ions were bound mainly in the immobile residual fraction and Cr(VI) ions were bound in the reducible fraction. The presence of Fe (oxyhydr)oxides in soil and sediments increases their adsorption capacity for Cr, in particular for hexavalent Cr in an acid environment due to their properties (high pHPZC).

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Sorption/desorption differences among three ferrihydrites prepared by different synthesis methods

Cited by 13 publications

References 22 publications

Simultaneous lead and antimony immobilization in shooting range soil by a combined application of hydroxyapatite and ferrihydrite

Simultaneous lead and antimony immobilization in shooting range soil by a combined application of hydroxyapatite and ferrihydrite

Nanoscale zero valent supported by Zeolite and Montmorillonite: Template effect of the removal of lead ion from an aqueous solution

Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions

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