Heavy metal adsorptivity of calcium-alginate-modified diethylenetriamine-silica gel and its application to a flow analytical system using flame atomic absorption spectrometry

Mori, Miwako; Suzuki, Toshinobu; Sugita, Tsuyoshi; Nagai, Daisuke; Hirayama, Kazuo; Onozato, Makoto; Itabashi, Hideyuki

doi:10.1016/j.aca.2014.06.015

Cited by 13 publications

(1 citation statement)

References 32 publications

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“…3) though the adsorption capacity was alleviated than Na 2 CO 3 regenerated adsorbent. Compared to slow release of Cu(II) using the sodium carbonate, the released Cu(II) quickly approached 6.7 mM within 5 min using hydrogen chloride, showing the potential of this process for enrichment of copper metal in a system as reported elsewhere [6]. The elution mechanism might involve the ionexchange of Cu(II) with Na + or H + [7].…”

Section: Advances In Engineering Research Volume 141mentioning

confidence: 99%

Fast removal of concentrated heavy metal ions using an alginate-poly(ethylene imine) biological adsorbent

Ye¹,

XSong²

2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abstract. Accumulation of heavy metals in aqueous environment has raised increasing concerns for public health. An alginate based biodegradable adsorbent was successfully developed for fast removal of heavy metals, and could adsorb 99.4% Cu(II) in 10 min when immersed in 10 mM Cu(II). Surface characteristics exhibited 25.65 wt% occupancy of Cu(II), further demonstrating the high adsorption capacity of the adsorbent. The adsorbent can be regenerated using either 10 wt% of Na 2 CO 3 or 0.1 M HCl. Reusability under each condition did not show decrease. Adsorption of Fe(II) was also tested. The adsorbent showed 95% removal of Fe(II) in just 2 min. These results demonstrate successful design and preparation of a novel biodegradable adsorbent with a matrix of properties suitable for application in fast removal of heavily polluted waste water containing a high content of metal ions.

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Section: Advances In Engineering Research Volume 141mentioning

confidence: 99%

Fast removal of concentrated heavy metal ions using an alginate-poly(ethylene imine) biological adsorbent

Ye¹,

XSong²

2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Electrolytic removal of alizarin red S by Fe/Al composite hydrogel electrode for electrocoagulation toward a new wastewater treatment

Zhang

2016

Environ Sci Pollut Res

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This paper studies Fe/Al composite hydrogel electrode electrocoagulation (EC) and adsorption of alizarin red S (ARS). ARS removal efficiency and degradation mechanism when applying Fe/Al composite hydrogel electrode were investigated. The optimum experimental factors and degradation of ARS were discussed. ARS degradation was optimal operation at initial pH 3 with O.The experimental results showed that the COD removal efficiency was better, reaching to about 90 % when applying the novel electrode system. The discoloration rate also reached the best effect of 99 % in the superior technical conditions. The optimum electrolysis time is about 30 min. Results revealed that the efficiency in the EC process with Fe/Al composite hydrogel electrodes were much better than that in conventional electrode system. In addition, Fe/Al composite hydrogel electrodes are environment-friendly material, which reuse waste and reduce cost. Hydrogel has certain iron exchange capacity to eliminate the residual metal irons. It is found that the application of ultrasonic helps to accelerate the electrocoagulation of ARS. This study not only realizes the ultrasonic, flotation, coagulation, and adsorption of the combination but also gains economy and environment. Consequently, the unique performance of Fe/Al composite hydrogel electrodes opens promising perspectives for fast, high, and economical treatment of wastewater containing dyes or/and organic contaminants.

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Synthesis of mesoporous silica-coated magnetic nanoparticles modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole and its application as Cu(II) adsorbent from aqueous samples

Wondracek

Jorgetto

Silva

et al. 2016

Applied Surface Science

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This study presents an alternative, rapid, and environment-friendly synthesis procedure of a magnetic core-shell mesoporous SBA-15 silica composite, its functionalization with 4-amino-3-hydrazino-5mercapto-1,2,4-triazole (Purpald), and its application in dispersive solid-phase microextraction (DSPME) for Cu(II) from water. The materials were characterized through magnetization measurements, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR) of 29 Si and 13 C, elemental analysis, and surface area measurements. FTIR and NMR analyses indicated the presence of the ligand on the functionalized material and that it was coupled through a C S bond. TEM images clearly show that the magnetite core particles were effectively coated with a silica shell. The material presented a surface area of 287.99 m 2 g −1 and an average pore diameter of approximately 15.1 nm. The material had its point of zero charge (PZC) determined (6.17) and its adsorption capacity was evaluated as a function of time, pH, and metal concentration. Dynamic adsorption equilibrium was reached in 120 min, and it had a good correlation with the pseudo-second-order kinetic model (r 2 = 0.9997). The maximum experimental adsorption capacity (0.0786 mmol g −1) and the value calculated by the linearized Langmuir model (0.0799 mmol g −1) are very approximate, indicating the formation of a monolayer over the material. Furthermore, the material proved to be very stable, because their adsorption capacity remained greater than 95% even after 10 cycles of adsorption/desorption. A high enrichment factor of 98.1-fold was observed, indicating that this material is suitable for the preconcentration of trace Cu(II) ions before analysis through flame atomic absorption spectrometry (FAAS).

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Heavy metal adsorptivity of calcium-alginate-modified diethylenetriamine-silica gel and its application to a flow analytical system using flame atomic absorption spectrometry

Cited by 13 publications

References 32 publications

Fast removal of concentrated heavy metal ions using an alginate-poly(ethylene imine) biological adsorbent

Fast removal of concentrated heavy metal ions using an alginate-poly(ethylene imine) biological adsorbent

Electrolytic removal of alizarin red S by Fe/Al composite hydrogel electrode for electrocoagulation toward a new wastewater treatment

Synthesis of mesoporous silica-coated magnetic nanoparticles modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole and its application as Cu(II) adsorbent from aqueous samples

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