Fe/Ti co-pillared clay for enhanced arsenite removal and photo oxidation under UV irradiation

Li, Yuan; Cai, Xiaoyu; Guo, Jingwei; Zhou, Shimin; Na, Ping

doi:10.1016/j.apsusc.2014.10.111

Cited by 28 publications

(9 citation statements)

References 47 publications

(56 reference statements)

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“…The large quantity of these elements in this fraction shows that they are linked to the crystalline network of the secondary minerals and are not easily remobilized to the aquatic environment. 13,19,28,[45][46][47] Figure 3 also shows that there was a modification in the fractionation profile of trace elements (S11 to S13) after the Mariana environmental accident with deposition of the mud layer (S11a to S13a). Modification in the fractionation profile can be better observed in Table 3, where the average values between sampling points are presented for the concentration of each element in the different sediment fractions.…”

Section: Total Trace Elementsmentioning

confidence: 99%

Trace Elements in River Waters and Sediments Before and After a Mining Dam Breach (Bento Rodrigues, Brazil)

Silva¹,

Bellato²,

Neto³

et al. 2018

Quim. Nova

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, the Fundão dam ruptured which caused the spill of a large quantity of tailings from the extraction of iron ores to the Gualaxo do Norte, Carmo and Doce Rivers. Seven months prior to the rupture, our group had collected water and sediment samples at 13 points along the Tripuí Creek and the entire length of the Carmo River. Six months after deposition of the mud, new samples were collected in the Carmo River. Thus, the present study sought to evaluate the concentrations of trace elements in the waters and their distribution and mobility in sediment by BCR sequential extraction before and after the deposition of the tailings mud. Arsenic concentrations in the water samples were between 10.4 and 50.4 µg L -1 , which exceeded 10 ug L -1 (maximum limit permitted by Brazilian environmental regulations for water destined for human consumption) . The tailing mud layer on the sediments caused concentration increases of As (20%), Cd (13%), Co (5%), Cr (9%), Cu (11%), Ni (4%), Pb (7%) and Zn (19%) in the easily remobilized fractions. The presence of the elements in these fractions was indicative of high ecotoxicological risk and potential harm to the health of the local population.

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Section: Total Trace Elementsmentioning

confidence: 99%

Trace Elements in River Waters and Sediments Before and After a Mining Dam Breach (Bento Rodrigues, Brazil)

Silva¹,

Bellato²,

Neto³

et al. 2018

Quim. Nova

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show abstract

“…Generally, the pillaring increases microporosity of clays that remains stable in high-temperature reactions (Li et al, 2015b), and offers a greater surface area. Thus, the PILC are quite suitable for gas-solid catalytic reactions.…”

Section: Introductionmentioning

confidence: 99%

Performance of Ti-pillared montmorillonite supported Fe catalysts for toluene oxidation: The effect of Fe on catalytic activity

Liang

Liu

et al. 2016

Applied Clay Science

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“…Therefore, a low cost adsorbent with high adsorption capacities of arsenic is desirable. Recently, many researchers successfully developed cerium-based bimetal oxide adsorbents, such as Ce-Ti [31,32] and Fe-Ce [33]. The results indicated a remarkably higher adsorption capacity of As (V) than many reported adsorbents.…”

Section: Introductionmentioning

confidence: 98%

Removal of Arsenite from Water by Ce-Al-Fe Trimetal Oxide Adsorbent: Kinetics, Isotherms, and Thermodynamics

Sun

Zhang

Marhaba

et al. 2016

Journal of Chemistry

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Ce-Al-Fe trimetal oxide adsorbent was prepared. The morphology characteristics of the new adsorbent were analysed by the transmission electron microscope (SEM) method. The SEM results implied its ability in the adsorption of As (III). To verify the analyses, bench-scale experiments were performed for the removal of As (III) from water. In the experiments of adsorption, As (III) adsorption capacity of the trimetal oxide adsorbent was presented significantly higher than activated aluminium oxide and activated carbon. As (III) adsorption kinetics resembled pseudo-second-order adsorption mode. When initial As (III) concentration was 3, 8, and 10 mg·L−1, the maximum adsorption capacity achieved was 1.48, 3.73, and 5.12 mg·g−1, respectively. In addition, the experimental adsorption data were described well by the Freundlich adsorption isotherm model at 20, 30, and 40°C. The enthalpy change(ΔS), the standard free energy(ΔG), and entropy change(ΔH)indicated that the nature of As (III) adsorption was exothermic and spontaneous with increasing randomness on the interface of solid and liquid. And the adsorption mechanism can be interpreted as chemisorption with As (III) multilayer coverage formation on the adsorbent surface.

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Fe/Ti co-pillared clay for enhanced arsenite removal and photo oxidation under UV irradiation

Cited by 28 publications

References 47 publications

Trace Elements in River Waters and Sediments Before and After a Mining Dam Breach (Bento Rodrigues, Brazil)

Trace Elements in River Waters and Sediments Before and After a Mining Dam Breach (Bento Rodrigues, Brazil)

Performance of Ti-pillared montmorillonite supported Fe catalysts for toluene oxidation: The effect of Fe on catalytic activity

Removal of Arsenite from Water by Ce-Al-Fe Trimetal Oxide Adsorbent: Kinetics, Isotherms, and Thermodynamics

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