Adsorption of heavy metals in water by modifying Fe3O4 nanoparticles with oxidized humic acid

Xue, Shuwen; Xiao, Yawen; Wang, Guoqiang; Fan, Jinjin; Wan, Keji; He, Qiang; Gao, Mingqiang; Miao, Zhenyong

doi:10.1016/j.colsurfa.2021.126333

Cited by 75 publications

(21 citation statements)

References 39 publications

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“…After six cycles, the removal percentage was reduced by 5.1% for Pb(II), 6.7% for Cd (II), and 8.5% for Cu(II) heavy metals. Xue et al [ 132 ] studied the regeneration cycles for Fe 3 O 4 NPs modified with HA, using 0.1 mol L −1 HCl as the regenerative agent. After four desorption cycles, the adsorbent showed 95% of removal efficiency for Pb(II), Cu(II), Cd(II), and of around 70% for Ni(II) in a high acidic medium of pH = 1.0.…”

Section: In-detail Discussion Of the Adsorbent Propertiesmentioning

confidence: 99%

Differentiating Nanomaghemite and Nanomagnetite and Discussing Their Importance in Arsenic and Lead Removal from Contaminated Effluents: A Critical Review

2021

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Arsenic and lead heavy metals are polluting agents still present in water bodies, including surface (lake, river) and underground waters; consequently, the development of new adsorbents is necessary to uptake these metals with high efficiency, quick and clean removal procedures. Magnetic nanoparticles, prepared with iron-oxides, are excellent candidates to achieve this goal due to their ecofriendly features, high catalytic response, specific surface area, and pulling magnetic response that favors an easy removal. In particular, nanomagnetite and maghemite are often found as the core and primary materials regarding magnetic nanoadsorbents. However, these phases show interesting distinct physical properties (especially in their surface magnetic properties) but are not often studied regarding correlations between the surface properties and adsorption applications, for instance. Thus, in this review, we summarize the main characteristics of the co-precipitation and thermal decomposition methods used to prepare the nano-iron-oxides, being the co-precipitation method most promising for scaling up processes. We specifically highlight the main differences between both nano-oxide species based on conventional techniques, such as X-ray diffraction, zero and in-field Mössbauer spectroscopy, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and X-ray magnetic circular dichroism, the latter two techniques performed with synchrotron light. Therefore, we classify the most recent magnetic nanoadsorbents found in the literature for arsenic and lead removal, discussing in detail their advantages and limitations based on various physicochemical parameters, such as temperature, competitive and coexisting ion effects, i.e., considering the simultaneous adsorption removal (heavy metal–heavy metal competition and heavy metal–organic removal), initial concentration, magnetic adsorbent dose, adsorption mechanism based on pH and zeta potential, and real water adsorption experiments. We also discuss the regeneration/recycling properties, after-adsorption physicochemical properties, and the cost evaluation of these magnetic nanoadsorbents, which are important issues, but less discussed in the literature.

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Section: In-detail Discussion Of the Adsorbent Propertiesmentioning

confidence: 99%

Differentiating Nanomaghemite and Nanomagnetite and Discussing Their Importance in Arsenic and Lead Removal from Contaminated Effluents: A Critical Review

2021

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“…This has sparked interest in finding materials that are both efficient and affordable. Various uses low-cost adsorbent materials including saw dust, humic acid, biomass, cellulose, peat, chitin, chitosan, orange waste, rice husk, and wheat bran are employed by diverse researchers [9][10][11][12]. Another low-cost adsorbents showing capability to adsorb heavy metals are clays [13].…”

Section: Introductionmentioning

confidence: 99%

In situ chemical synthesis and characterization of PAN/clay nanocomposite for potential removal of Pb+2 ions from aqueous media

et al. 2021

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A green synthesis of polymer clay nanocomposites (PCNs) was carried out by in situ polymerization for their potential in order to remove the heavy metal from aqueous solution. At first stage, cloisite was functionalized using Vinyl Triethoxy Silane (VTES) to generate radicals on its surface. After functionalization, the monomer was grafted at these functional sites. The grafting was induced by varying initiator ratio (1.0 2.0 and 3. 0wt %). The maximum grafting of 78% was obtained with 2.0%wt initiator. To enhance number of active sorption sites the PNCs were further modified using hydroxylamine hydrochloride (NH 2 OH.HCl). The characterizations of prepared samples were carried out via Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), Thermogravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM). The adsorption potential of prepared sorbents was checked for lead metal ions via Atomic Absorption Spectroscopy (AAS). The prepared PCNs showed 92% adsorption potential of Pb(II) ion at 5.0 pH with 240 min contact time. KeywordsPolymer clay nanocomposites (PCNs) • Polyacylonitrile (PAN) • Hydroxylamine hydrochloride (NH 2 OH.HCl) • Atomic Absorption Spectroscopy (AAS)

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“…For evaluating how K + , Ca 2+ , and Mg 2+ ions affected Pb 2+ -, Cu 2+ -, and Cd 2+ -ion adsorption, Ca(NO 3 ) 2 , KNO 3 , and Mg(NO 3 ) 2 solutions with 0–5 ppm concentrations were added to solutions containing 10 ppm Pb 2+ , Cu 2+ , and Cd 2+ ions and 0.5 g L –1 HA-Ca/Fe 3 O 4 adsorbent …”

Section: Methodsmentioning

confidence: 99%

“…In particular, adsorption has gained high popularity due to low cost and favorable performance . Many kinds of adsorbents have gained application in heavy-metal removal, including graphene oxide (GO), metal–organic framework (MOF), activated carbon (AC), biochar, or natural macromolecular compound. − Being used as the low-cost sorbent material of low-rank coal origin, humic acid (HA) contains numerous acidic groups like carboxyl (−COOH), phenolic hydroxyl (−OH), and other O-containing functional groups that provide more adsorption sites and enhance the adsorption capacity …”

Section: Introductionmentioning

confidence: 99%

“…Because Ca 2+ is abundant in nature and does not harm the environment, in the study, CaCl 2 was employed for modifying HA/Fe 3 O 4 and promoting the adsorption for heavy metals from wastewater. In addition, according to existing studies in the literature, the main mechanism of heavy-metal adsorption onto HA/Fe 3 O 4 was complexation of O-containing functional groups, and other possible mechanisms were rarely described . Due to the introduction of Ca 2+ ions, in this study, we used a new method to determine the typical removal mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Calcium-Modified Fe₃O₄ Nanoparticles Encapsulated in Humic Acid for the Efficient Removal of Heavy Metals from Wastewater

et al. 2021

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Ca-modified Fe3O4 nanoparticles encapsulated in humic acid (HA-Ca/Fe3O4) were produced using a co-precipitation method. Furthermore, the adsorption performance of HA-Ca/Fe3O4 as well as the effect of coexisting ions and mechanisms were evaluated. A good description of the adsorption process was given using pseudo-second-order kinetic and Langmuir models. The adsorption capacities of HA-Ca/Fe3O4 for Pb2+, Cu2+, and Cd2+ were 208.33, 98.33, and 99.01 mg g–1, respectively. The 0.02–0.1 times concentrations in alkali and alkaline-earth metals promoted Pb2+ and Cd2+ adsorption; however, any concentration of alkali and alkaline-earth metals inhibited Cu2+-ion adsorption, probably owing to the differences in ionic radii between the interfering and heavy-metal ions. Pb2+, Cu2+, and Cd2+ removal using HA-Ca/Fe3O4 occurred via ion exchange, complexation of O-containing functional groups, mineral precipitation, and π-electron coordination. A method was proposed to calculate the contribution of these mechanisms to the adsorption process. In practice, HA-Ca/Fe3O4 can remove 99% Pb2+ and 91% Cu2+ and Cd2+ from real wastewater samples. Following five adsorption–desorption cycles, HA-Ca/Fe3O4 adsorption capacity did not change significantly. The aforementioned results indicated that HA-Ca/Fe3O4 presented a good potential in removing heavy metals in wastewater.

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Adsorption of heavy metals in water by modifying Fe3O4 nanoparticles with oxidized humic acid

Cited by 75 publications

References 39 publications

Differentiating Nanomaghemite and Nanomagnetite and Discussing Their Importance in Arsenic and Lead Removal from Contaminated Effluents: A Critical Review

Differentiating Nanomaghemite and Nanomagnetite and Discussing Their Importance in Arsenic and Lead Removal from Contaminated Effluents: A Critical Review

In situ chemical synthesis and characterization of PAN/clay nanocomposite for potential removal of Pb+2 ions from aqueous media

Calcium-Modified Fe₃O₄ Nanoparticles Encapsulated in Humic Acid for the Efficient Removal of Heavy Metals from Wastewater

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Adsorption of heavy metals in water by modifying Fe3O4 nanoparticles with oxidized humic acid

Cited by 75 publications

References 39 publications

Differentiating Nanomaghemite and Nanomagnetite and Discussing Their Importance in Arsenic and Lead Removal from Contaminated Effluents: A Critical Review

Differentiating Nanomaghemite and Nanomagnetite and Discussing Their Importance in Arsenic and Lead Removal from Contaminated Effluents: A Critical Review

In situ chemical synthesis and characterization of PAN/clay nanocomposite for potential removal of Pb+2 ions from aqueous media

Calcium-Modified Fe3O4 Nanoparticles Encapsulated in Humic Acid for the Efficient Removal of Heavy Metals from Wastewater

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Product

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Calcium-Modified Fe₃O₄ Nanoparticles Encapsulated in Humic Acid for the Efficient Removal of Heavy Metals from Wastewater