High-speed recovery of antimony using chelating porous hollow-fiber membrane

Nishiyama, Shin; Saito, Kaori; Saito, Kyoichi; Sugita, Kazuyuki; Sato, Katsuyuki; Akiba, Mitsuo; Saito, Tomonori; Tsuneda, Satoshi; Hirata, Akira; Tamada, Masao; Sugo, Takanobu

doi:10.1016/s0376-7388(02)00558-6

Cited by 48 publications

(26 citation statements)

References 22 publications

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“…For the removal of Sb(V), although Sb(V) could be adsorbed by membrane pores during filtration [9], the removal efficiency is low because of the relatively large pore diameter (average pore diameter: 30 nm). Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Antimony (Sb), which is similar to arsenic (As), has received great attention due to its high toxicity and carcinogenicity towards humans after long-time exposure [1][2][3]. The maximum contaminant level (MCL) in drinking water for Sb is 5.0 and 6.0 µg/L in the USA and Europe, respectively [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Previous study has compared the behaviors between As and Sb during coagulation, and referred to the following order of the removal efficiency for As and Sb with Fe-based coagulants at neutral pH condition: As(V) > Sb(III) > As(III) > Sb(V) [7]. To remove Sb effectively, various technologies have been investigated, such as coagulation/flocculation [8], membrane separation [9], electrochemical methods [10], adsorption [11], etc. Most studies have found that adsorption is still the most promising method to remove antimony, after considering the cost and practical operation [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the flocs could be well separated from the solution by the UF membrane. Furthermore, although the UF membrane pore diameter is relatively large (from several nanometers to dozens of nanometers), it can also remove heavy metals partially due to adsorption by the membrane pores [9], leading to an increase in the Sb(V) removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal

Wang

Liu

et al. 2017

Journal of Membrane Science

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A B S T R A C TAntimony (Sb) is harmful to human health, and Sb(V) is much more difficult to remove from water than other toxic elements such as arsenic (As). Theoretical studies have suggested that in situ flocs have stronger adsorption ability toward heavy metals than pre-made adsorbents. We believe that rational design of in situ flocs and the associated device structure will enable a floc-based device to be utilized in the removal of heavy metals. Based on this concept, we developed an integrated process taking advantage of the strong adsorption abilities of in-situ Al or Fe hydrolytic flocs and excellent separation properties of ultrafiltration (UF) membranes. We found that flocs could be well dispersed in a membrane tank with aeration from the bottom, and Fe-based flocs performed better in removing Sb(V) and alleviating membrane fouling than Al-based flocs. We also demonstrated that higher Sb (V) removal efficiency was induced with continuous injection, and lower solution pH. By controlling the aeration rate, injection frequency and the solution pH, membrane fouling was alleviated, especially under weakly acidic conditions. Additionally, owing to the higher rejection efficiency of the UF membrane, the effluent quality was improved, including the iron concentration, turbidity, and chromaticity. This innovative separation method shows promising potential for application in removing heavy metals in water treatment.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal

Wang

Liu

et al. 2017

Journal of Membrane Science

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“…Additionally, Dominguez et al [10] ) from water; Liao et al [18] prepared an affinity membrane system on the basis of condensed tannins and natural collagen fiber membranes and investigated the adsorption-desorption behaviors of UO 2 2+ . Nishiyama et al [19] also prepared a chelated polyethylene porous hollow-fiber membrane containing an iminodiethanol (IDE) group whereas Yuan et al [20] successively applied electrospun metal oxide-TiO 2 nanofiber for elemental mercury removal from flue gas. Recently several researchers have utilized electrospun fibrous mat for ion removal [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Metal adsorption behavior of 2,4-dinitrophenyl hydrazine modified polyacrylonitrile nanofibers

Jitjaicham¹,

Kampalanonwat²,

Supaphol³

2013

Express Polym. Lett.

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Abstract. Electrospun polyacrylonitrile nanofiber mats (es-PAN nanofiber mats) were surface modified by 2,4-dinitrophenyl-hydrazine (2,4-DNPH) to yield the metal ion adsorption material (es-PAN-DNPH nanofiber mats) and were investigated their adsorption behaviors. Functional modification of the es-PAN nanofiber mats and conventional polyacrylonitrile fibers (c-PAN fibers) were prepared by using 4% (w/v) of 2,4-DNPH in 1,2-ethandiol at 110°C for 6 h to obtained c-PAN-DNPH fibers. The average diameter of the es-PAN-DNPH nanofiber mats was 0.25 !m, which was comparatively smaller than the es-PAN precursor. Their functional groups were confirmed by Fourier transform infrared spectroscopy (FT-IR) and their adsorption behaviors to trace Ag(I), Bi(III), Ga(III), and In(III) from aqueous solutions and were investigated by the induced couple plasma technique. The FT-IR spectra showed the existence of NN=C-NHNH-, O=C-NHNH-, and -NO 2 functional groups for metal complexes. The adsorption capacities of the obtained es-PAN-DNPH were 7.14 to 36.36% higher than those of c-PAN-DNPH fibers. All adsorption plots onto es-PAN-DNPH nanofiber mats and c-PAN-DNPH fibers followed the Langmuir isotherm and indicated monolayer adsorption characteristics.

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Effect of Pollutant Species on the Performance of Chelating Membranes for Wastewater Treatment

et al. 2023

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A chelating membrane was fabricated to simultaneously remove metal ions and proteins from simulated wastewater. For a mixture consisting of a single ion and protein, the chelating membrane exhibited overall good separation performance (except for Cd2+), with both ion removal and protein rejection surpassing 90 %. The removal of metal ions highly depends on the chelation of amidoxime groups with ions rather than the complexation of proteins with ions. An increase in the content of metal ions has a detrimental impact on the protein rejection efficiency owing to the damaging effect of heavy metals on the protein. Similarly, increasing the amount of protein adversely affects the removal of ions due to the weakened chelation of amidoxime groups with metal ions.

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High-speed recovery of antimony using chelating porous hollow-fiber membrane

Cited by 48 publications

References 22 publications

Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal

Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal

Metal adsorption behavior of 2,4-dinitrophenyl hydrazine modified polyacrylonitrile nanofibers

Effect of Pollutant Species on the Performance of Chelating Membranes for Wastewater Treatment

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