Calix[4]pyrrole for the removal of arsenic (III) and arsenic (V) from water

Namor, Angela F. Danil de; Hakawati, Nawal Al; Hamdan, Weam Abou; Soualhi, Rachida; Korfali, Samira Ibrahim; Valiente, Liliana

doi:10.1016/j.jhazmat.2016.11.066

Cited by 32 publications

(14 citation statements)

References 25 publications

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“…where R is the universal gas constant ( Table 3 shows a comparison of the maximum adsorption capacity of different materials reported in the literatures [17,[65][66][67][68][69][70] as adsorbents for As(III) from aqueous media under different experimental conditions. The q max (52.63 mg/g) value of for ZnO nanorods was much higher than those materials used for removing As(III) ions.…”

Section: Effect Of Temperaturementioning

confidence: 99%

Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies

et al. 2018

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Removal of metals from wastewaters causes a big concern from the environmental point of view due to their extreme toxicity towards aquatic life and humans. Application of As(III) from aqueous solution by ZnO nanorods as adsorbent has been investigated in the present study. The synthesized nanorods were characterized by XRD, FT-IR spectroscopy, SEM, and thermogravimetric analysis. Optimum biosorption conditions were determined with respect to pH, adsorbent dose, contact time, and temperature. The experimental data were examined using the Lagergren's first-order, pseudo-second-order and intraparticle diffusion kinetic models. The results revealed that the pseudo-second-order kinetic model provided the best description of the data. Langmuir and Freundlich isotherm models were applied to the equilibrium data. The maximum As(III) sorption capacity of ZnO nanorods was found to be 52.63 mg/g at pH 7, adsorbent dose 0.4 g, contact time 105 min, and temperature 323 K. The calculated thermodynamic parameters, ΔG o (between − 5.741, − 5.342 and − 4.538 kJ/mol at 303-323 K), ∆H o (13.75 kJ/mol) and ∆S o (0.0616 J/mol K) showed that the sorption of As(III) onto ZnO nanorods was feasible, spontaneous and exothermic, respectively.

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Section: Effect Of Temperaturementioning

confidence: 99%

Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies

et al. 2018

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“…15 In addition to acting as novel solid supports to separate anion mixtures and also as anion transporters across lipid bilayer membranes, 16 they have found signicant applications in uorescent, 17 colorimetric 18 and electrochemical signaling devices. 19 In addition to this, the anion binding ability of C4Ps makes them efficient in various domains of daily life; for example, they have found applications in waste-water treatment, 20 composites in food packaging, storage, preservation, detection of pollutants, removal of heavy metal ions, etc. [21][22][23] In the past two decades, many transformations and modications 5,[24][25][26][27] have been carried out to tune the binding affinity of C4Ps including b/meso-substitution(s), strapping and appending of aromatic rings at the meso-positions.…”

Section: Introductionmentioning

confidence: 99%

New dimensions in calix[4]pyrrole: the land of opportunity in supramolecular chemistry

et al. 2019

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“…The maximum arsenic(III) adsorption capacity of bio-schwertmannite was higher than that of other adsorption materials under similar pH conditions, such as 1-4 mg/g for activated alumina [16], 27.1 mg/g for FeCl 3 −based materials [17], 64.2 mg/g for chitosan-functionalized graphene oxide [18], and 15.28 mg/g for calix pyrrole [4,20]. Therefore, the removal arsenic(III) from groundwater or other contaminated water sources using bio-schwertmannite has great commercial value.…”

mentioning

confidence: 91%

“…Schwertmannite [15], activated alumina [16], FeCl 3 -based materials [17], chitosan-functionalized graphene oxide [18], bismuth impregnated biochar [19], calix [4] pyrrole [20], and other adsorbents have been used for arsenic(III) removal. Schwertmannite, which is a poorly crystalline Fe(III)-oxyhydroxy-sulfate mineral whose chemical formula is Fe 8 O 8 (OH) 8-2x (SO 4 ) x (1 < x < 1.75) [21,22] that acts as a good adsorbent for arsenic(III), has gained increasing attention in recent years [23].…”

mentioning

confidence: 99%

Heating Changes Bio-Schwertmannite Microstructure and Arsenic(III) Removal Efficiency

et al. 2017

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Schwertmannite (Sch) is an efficient adsorbent for arsenic(III) removal from arsenic(III)-contaminated groundwater. In this study, bio-schertmannite was synthesized in the presence of dissolved ferrous ions and Acidithiobacillus ferrooxidans LX5 in a culture media. Bio-synthesized Sch characteristics, such as total organic carbon (TOC), morphology, chemical functional groups, mineral phase, specific surface area, and pore volume were systematically studied after it was dried at 105 • C and then heated at 250-550 • C. Differences in arsenic(III) removal efficiency between 105 • C dried-sch and 250-550 • C heated-sch also were investigated. The results showed that total organic carbon content in Sch and Sch weight gradually decreased when temperature increased from 105 • C to 350 • C. Sch partly transformed to another nanocrystalline or amorphous phase above 350 • C. The specific surface area of 250 • C heated-sch was 110.06 m 2 /g compared to 5.14 m 2 /g for the 105 • C dried-sch. Total pore volume of 105 • C dried-sch was 0.025 cm 3 /g with 32.0% mesopore and 68.0% macropore. However, total pore volume of 250 • C heated-mineral was 0.106 cm 3 /g with 23.6% micropore, 33.0% mesopore, and 43.4% macropore. The arsenic(III) removal efficiency from an initial 1 mg/L arsenic(III) solution (pH 7.5) was 25.1% when 0.25 g/L of 105 • C dried-sch was used as adsorbent. However, this efficiency increased to 93.0% when using 250 • C heated-sch as adsorbent. Finally, the highest efficiency for arsenic(III) removal was obtained with sch-250 • C due to high amounts of sorption sites in agreement with the high specific surface area (SSA) obtained for this sample.

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Calix[4]pyrrole for the removal of arsenic (III) and arsenic (V) from water

Cited by 32 publications

References 25 publications

Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies

Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies

New dimensions in calix[4]pyrrole: the land of opportunity in supramolecular chemistry

Heating Changes Bio-Schwertmannite Microstructure and Arsenic(III) Removal Efficiency

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