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論文

Adsorption of Rose Bengal dye from aqueous solution by amberlite IRA-938 resin; Kinetics, isotherms, and thermodynamic studies

Naushad, M.*; Alothman, Z. A.*; Awual, M. R.; Alfadul, S. M.*; Ahamad, T.*

Desalination and water treatment, 57(29), p.13527 - 13533, 2016/06

 被引用回数:174 パーセンタイル:99.77(Engineering, Chemical)

In this study, the effectiveness of amberlite IRA-938 resin for Rose Bengal (RB) dye removal from aqueous phase was evaluated. For the RB dye removal, equilibrium was achieved within 45 min because rate of adsorption was fast. The adsorption equilibrium for RB dye onto amberlite IRA-938 resin was in good agreement with Langmuir adsorption isotherm. It was observed that amberlite IRA-938 resin had excellent RB dye adsorption capacity. The environmental applicability of amberlite IRA-938 resin was performed in the separation of RB dye from the tap water sample spiked with 50 mg/L RB dye solution. The breakthrough and exhaustive capacity were 100 and 325 mg/g, respectively.

論文

Bromate removal from water samples using strongly basic anion exchange resin Amberlite IRA-400; Kinetics, isotherms and thermodynamic studies

Naushad, M.*; Khan, M. R.*; Alothman, Z. A.*; Awual, M. R.

Desalination and water treatment, 57(13), p.5781 - 5788, 2016/03

 被引用回数:35 パーセンタイル:89.28(Engineering, Chemical)

The removal of bromate from aqueous medium by Amberlite IRA-400 anion exchange resin was explored in order to identify the capability of this resin to remove bromate from real water samples. The effects of several physicochemical parameters such as contact time, initial bromate concentration, initial pH, and temperature were studied. The concentration of bromate was determined using ultra-performance liquid chromatography tandem mass spectrometry. The adsorption kinetics and isotherms were well fitted by pseudo-second-order model and Freundlich model, respectively.

論文

Schiff based ligand containing nano-composite adsorbent for optical copper(II) ions removal from aqueous solutions

Awual, M. R.; Eldesoky, G. E.*; 矢板 毅; Naushad, M.*; 塩飽 秀啓; Alothman, Z. A.*; 鈴木 伸一

Chemical Engineering Journal, 279, p.639 - 647, 2015/11

 被引用回数:197 パーセンタイル:99.28(Engineering, Environmental)

A novel Schiff base ligand based nano-composite adsorbent (NCA) was prepared for the detection and removal of copper (Cu(II)) ions in wastewater samples. Upon the addition of Cu(II) ions to NCA at optimum conditions, the clear color was visible to the naked-eye in the detection system. This NCA exhibited an obvious color change from yellowish to dark green in the presence of Cu(II) ions in aqueous solution. The NCA could detect the Cu(II) ions over other foreign ions with high sensitivity and selectivity. For adsorption behaviour, influences several factors such as solution pH, contact time, concentration for Cu(II) ion adsorption was investigated by batch experiment in detail. The results showed that neutral solution pH was suitable to get optimum Cu(II) ions adsorption.

論文

Synthesis of sodium dodecyl sulfate-supported nanocomposite cation exchanger; Removal and recovery of Cu$$^{2+}$$ from synthetic, pharmaceutical and alloy samples

Naushad, M.*; Alothman, Z. A.*; Alam, M. M.*; Awual, M. R.; Eldesoky, G. E.*; Islam, M.*

Journal of the Iranian Chemical Society, 12(9), p.1677 - 1686, 2015/09

 被引用回数:42 パーセンタイル:80.04(Chemistry, Multidisciplinary)

A new surfactant-based nanocomposite cation exchanger, sodium dodecyl sulfate-Th(IV) tungstate (SDS-TT) was prepared by the sol-gel method. The SDS-TT was characterized by FTIR, XRD, TGA, SEM, EDS and TEM. The distribution studies for various metal ions on SDS-TT were performed in different acidic mediums. On the basis of distribution coefficient values, SDS-TT was found to be selective for Cu$$^{2+}$$ metal ion. SDS-TT was successfully used for the quantitative separation of Cu$$^{2+}$$ from the synthetic mixture, pharmaceutical formulation and brass sample.

論文

Large-pore diameter nano-adsorbent and its application for rapid lead(II) detection and removal from aqueous media

Shahat, A.*; Awual, M. R.; Khaleque, M. A.*; Alam, M. Z.*; Naushad, M.*; Chowdhury, A. M. S*

Chemical Engineering Journal, 273, p.286 - 295, 2015/08

 被引用回数:232 パーセンタイル:99.54(Engineering, Environmental)

The detection and removal of lead (Pb(II)) ions in water is essential for both human health and the natural environment. This study reported the feasibility of the large-pore diameter nano-adsorbent for capturing low level Pb(II) ions from aqueous solutions in a batch system, in order to comply with the toxicity limit for discharging wastewaters. The proposed Pb(II) detection system has good characteristics with high sensitivity and selectivity, robustness, easy operation, portability and use of a small sample volume. The competing ions effect was assessed with spiked samples and the nano-adsorbent exhibited high selectivity to Pb(II) ions with optimum color formation and the detection procedure can be easily applied to rapid on-site Pb(II) ions monitoring.

論文

Adsorption kinetics, isotherms, and thermodynamic studies for the adsorption of Pb$$^{2+}$$ and Hg$$^{2+}$$ metal ions from aqueous medium using Ti(IV) iodovanadate cation exchanger

Naushad, M.*; Alothman, Z. A.*; Awual, M. R.; Alam, M. M.*; Eldesoky, G. E.*

Ionics, 21(8), p.2237 - 2245, 2015/08

 被引用回数:239 パーセンタイル:99.7(Chemistry, Physical)

In the current study, Ti(IV) iodovanadate cation exchanger (TIV) was synthesized and applied for the removal of Pb$$^{2+}$$ and Hg$$^{2+}$$ metal ions from the aqueous medium. The adsorption studies were performed by the batch techniques and adsorption parameters viz. contact time, pH, initial metal ion concentration, and temperature were also investigated. The optimum adsorption of Pb$$^{2+}$$ and Hg$$^{2+}$$ were observed at pH6. The pseudo-second order equation represented the adsorption kinetics with high correlation coefficient. Langmuir model showed the best fitting to the isotherm equilibrium data, with a maximum adsorption capacity of 18.8 mg/g for Pb$$^{2+}$$ and 17.2 mg/g for Hg$$^{2+}$$.

論文

Functional ligand anchored nanomaterial based facial adsorbent for cobalt(II) detection and removal from water samples

Shahat, A.*; Awual, M. R.; Naushad, M.*

Chemical Engineering Journal, 271, p.155 - 163, 2015/07

 被引用回数:195 パーセンタイル:99.28(Engineering, Environmental)

Ligand anchored functional nanomaterials are increasingly gaining interest as efficient materials for various types of toxic pollutants. In this study, the organic ligand was densely anchored onto the mesoporous silica by the building-block approach as facial adsorbent, characterized and then examined for the cobalt (Co(II)) ion detection and removal from aqueous solutions. This study also examined the possibility of using facial adsorbent to remove low concentrations of Co(II) ions from water solution. The sorption isotherms fit the Langmuir sorption model well and the maximum Co(II) ion sorption capacity was 157.73 mg/g. The effective eluent of 0.20M HCl was used to elute the Co(II) from the facial adsorbent, and the adsorbent was simultaneously regenerated into the initial form after rinsing with water.

論文

Investigation of ligand immobilized nano-composite adsorbent for efficient cerium(III) detection and recovery

Awual, M. R.; Hasan, M. M.*; Shahat, A.*; Naushad, M.*; 塩飽 秀啓; 矢板 毅

Chemical Engineering Journal, 265, p.210 - 218, 2015/04

 被引用回数:195 パーセンタイル:99.29(Engineering, Environmental)

In this study, the organic ligand of 4-dodecyl-6-((4-(hexyloxy)phenyl)diazenyl) benzene-1,3-diol (DPDB) and mesoporous silica have been used to prepare the nano-composite adsorbent. The nano-composite adsorbent was fabricated by indirect immobilization of DPDB onto the mesoporous silica. The experimental data clarified that the Ce(III) was detected and adsorbed by the adsorbent at pH 2.50. The limit of detection for Ce(III) ions by the adsorbent was 0.12 microgram/L and the sorption capacity was 150.37 mg/g at optimum conditions. The proposed adsorbent allowed the sensitive, selective, easy to use, cost-effective, high efficiency, fast kinetics and stable capturing of Ce(III) ions even in the presence of diverse competing ions.

論文

Preparation of new class composite adsorbent for enhanced palladium(II) detection and recovery

Awual, M. R.; Hasan, M. M.*; Naushad, M.*; 塩飽 秀啓; 矢板 毅

Sensors and Actuators B; Chemical, 209, p.790 - 797, 2015/03

 被引用回数:126 パーセンタイル:99.21(Chemistry, Analytical)

In this study, we have developed S and N containing ligand of 5-tert-butyl-2-hydroxybenzaldehyde thiosemicarbazone. The organic ligand was anchored onto the mesoporous silica by an indirect method for the preparation of composite adsorbent. The adsorbent can detect Pd(II) ions at ultra-trace levels and recover the Pd(II) with high sorption capacity and efficiency. The adsorption isotherm data were well fitted with the Langmuir model, and the maximum sorption capacity of the composite adsorbent was 171.65 mg/g, which was close to the equilibrium sorption capacity.

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