Preparation of porous resin loaded with crystalline hydrous zirconium oxide and its application to the removal of arsenic

Suzuki, Toshishige M.; Bomani, John O.; Matsunaga, Hideyuki; Yokoyama, Toshiro

doi:10.1016/s1381-5148(99)00038-3

Cited by 197 publications

(107 citation statements)

References 12 publications

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“…Therefore, much effort was directed towards the design and synthesis of new polymers with tailored properties (Horák et al 2004;Grochowicz et al 2008;Wu et al 2012;Naghash and Shafie 2013;Zaleski et al 2015). A very interesting approach to the modification of the properties of preformed porous polymers is combining them with various inorganic species with technological importance such as silica gel, titania, zirconium oxide, and others (Suzuki et al 2000;Kierys et al 2010Kierys et al , 2013Koubková et al 2014). Polymer beads play a critical role in such polymer-inorganic composite materials by acting as supports, templates, or matrices.…”

Section: Introductionmentioning

confidence: 99%

Positron porosimetry study of mesoporous polymer–silica composites

et al. 2016

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The polymer-SiO 2 composites prepared using polymers with different chemical composition and porosity (i.e. XAD4, XAD16, and XAD7) as well as series of composites synthesized with different contents of silica species and at different pH were investigated. The study was conducted to compare the results of nitrogen adsorption and positron porosimetry for these three sets of samples. The possible causes of the inconsistency between the results of both methods are discussed. The impact of the chemical character of the polymer support surface on the final properties of the polymer-silica composite was found to be greater than its porosity (i.e. the shape of pores and their connectivity). Changing the SiO 2 content influences mostly the pore volume of composites. To significantly modify their pore size distribution, more than 30 wt% of silica species are required. The composite synthesized at pH 5 has the widest pore size distribution among all samples supported by XAD7. The discrepancies concerning the porosity derived with both methods are the smallest for composites where XAD7 was used as the support. This allows determination of the relation V = (3.38 V PALS -0.03) cm 3 /g, which may be useful for estimation of pore volumes corresponding to those found by nitrogen adsorption.

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Section: Introductionmentioning

confidence: 99%

Positron porosimetry study of mesoporous polymer–silica composites

et al. 2016

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“…Many adsorbents for arsenic removal incorporate a metal oxide that chemically adsorbs arsenate and arsenite. Since the retention mechanism involves chemical adsorption, metal oxide-based adsorbents have a much higher specificity for arsenic anions compared with other anions that are usually present in potable water, such as chloride and sulfate (Pierce and Moore, 1982;Ghosh and Yuan, 1987;Gao et al, 1995;Suzuki et al, 2000;Dutta et al, 2004;Jang, 2004;Jeong et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Homopolymer Polyacrylonitrile-Based Fibrous Sorbents for Arsenic Removal

Chaudhary

Farrell

2014

Environmental Engineering Science

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This research investigated the modification of homopolymer polyacrylonitrile (PAN) fibers for use as an adsorbent for removing arsenic from drinking water. Fibers were chemically modified and cross-linked using combinations of hydrazine hydrate and sodium hydroxide (NaOH) before being loaded with ferric hydroxide using two different iron loading procedures. Effects of reagent concentrations and reaction times on degree of chemical modification and fiber properties were investigated using Fourier transform infrared spectroscopy and ion-exchange measurements. Arsenate adsorption was a function of both the iron loading and the properties of the underlying fiber. For fibers treated with only a single reagent, both Fe 3 + and arsenate adsorption could be understood in terms of ion-exchange properties of the fiber surfaces. However, for fibers treated with both hydrazine and NaOH, the ion-exchange properties of the surface could not explain the Fe 3 + and arsenate adsorption behavior. The best arsenate removal performance was obtained using the simplest pretreatment procedure of soaking in 10% NaOH at 95°C for 90 min, followed by precipitation coating of ferric hydroxide. This simple preparation procedure involves only two commonly available and inexpensive reagents and can be carried out without any specialized equipment. This suggests that adsorbents based on inexpensive homopolymer PAN fabric may be produced in developing areas of the world where commercial products may not be available.

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“…Adsorption, biosorption, complexation, chemical precipitation, solvent extraction, ion exchange and membrane processes have been commonly used in heavy metal contained wastewater treatment [5]- [6]. Adsorption is a high efficient and economical method in heavy metal removal from aqueous solutions among all the processes mentioned above [7].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Characteristics of Copper (II) onto Ferrocene Modified Resin

Wang¹,

Tian²,

He³

et al. 2013

IJESD

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Abstract-Ferrocene (Fc) modified cation exchange resin (FMCER) was synthesized for copper adsorption process and characterized by XRF and BET analysis. Fc has been successfully impregnated into resin, and Fc loaded on resin was about 0.1792% (w/w). Both surface area and pore width of resin was enlarged. Results from batch experiments indicated that the adsorption kinetics of Cu 2+ obeyed pseudo-second-order kinetic model and the adsorption rate constant was 0.0011 g/mg/min. Langmuir adsorption isotherm model fitted the adsorption of Cu 2+ well. The adsorption process of Cu 2+ was exothermic reaction. The adsorption process was pH dependent and the optimal pH was found to be 4-5, and maximum removal efficiency was 38.59% at pH 4.Index Terms-Ferrocene modified cation exchange resin, Cu 2+ , adsorption kinetics, isotherm study.

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Preparation of porous resin loaded with crystalline hydrous zirconium oxide and its application to the removal of arsenic

Cited by 197 publications

References 12 publications

Positron porosimetry study of mesoporous polymer–silica composites

Positron porosimetry study of mesoporous polymer–silica composites

Preparation and Characterization of Homopolymer Polyacrylonitrile-Based Fibrous Sorbents for Arsenic Removal

Adsorption Characteristics of Copper (II) onto Ferrocene Modified Resin

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