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Removal of Orange-G and Alizarin Red S from Aqueous Solution by CuCl2 Doped Polyaniline Composite Assisted by UV light
摘要： This work describes the adsorption of Orange-G and Alizarin Red S, from aqueous solutions onto 8 % PANI-CuCl2 adsorbent. Adsorption studies were performed by UV light irradiated batch experiments as a function of process parameters such as contact time, initial dye concentration, dosage of adsorbent and initial pH. Temperature was varied to investigate its effect on the adsorption capacity. Equilibrium adsorption isotherms were measured and the experimental data were analyzed by using Langumuir equation. Pseudo-second-order kinetic model was found to correlate with the experimental data well. The experimental data obtained in the present study indicates that CuCl2 doped with polyaniline can be attractive options for removal of dye from waste water.
关键词： Orange-G,PANI-CuCl2,Adsorption,Alizarin Red S
更新于2025-09-09 09:28:46
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Fabrication of MnO2-Amberlite for Photocatalytic Degradation of Alizarin Red S under Visible Light
摘要： Alizarin red S is a common toxic dyestuff causes water pollution that disturbs biota life in river and seawater. This study attempts to apply MnO2 immobilized in amberlite matrix to degrade Alizarin red S under UV illumination. With regard to various stirring time of MnO2-amberlite (6, 12, 18, 24 and 30 h) at room temperature, the BET verification shows the18 h-stirring time of MnO2-amberlite possessed the largest surface area (65.11 m2/g for 0.032 g sample). A strong peak of Mn-O linkage at 588 cm–1 is shown in FTIR spectra of MnO2-amberlite at 18 h stirring. The XRD of MnO2-amberlite at 18 h-stirring time shows a characteristic peak cluster at 25° (2è) related to additional crystal structure due to collision mechanical effect. SEM imaging of pure amberlite and different stirring time of MnO2-amberlite are also investigated. The fabricated MnO2-amberlite successfully degrades Alizarin red S under 1 h UV illumination (265 nm) applying 18 h-stirring time.
关键词： Aqueous solution,Photocatalytic degradation,Alizarin red S,MnO2-Amberlite
更新于2025-09-04 15:30:14
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Study on Resonance Rayleigh Scattering Spectra, Non-linear Scattering Spectra of Alizarin Red-Cetylpyridinium Bromide-Lead System and its Analytical Application
摘要： In pH 7.6 NH3·H2O medium, Alizarin red and cetylpyridinium bromide could react with lead to form ternary ion-association complex. As a result, the intensities of resonance Rayleigh scattering and the resonance non-linear scattering such as second-order scattering and frequency-doubling scattering were enhanced greatly. The maximum wavelength of resonance Rayleigh scattering, second-order scattering and frequency-doubling scattering was located at 288, 544 and 390 nm, respectively. The enhancement of the three scattering intensity (?I) was directly proportional to the concentration of lead in the range of 0.12-3.78 μg/mL for resonance Rayleigh scattering, 0.09-2.86 μg/mL for second-order scattering and 0.07-2.86 μg/mL for frequency-doubling scattering] and the detection limits (3σ) were 2.1ng/mL for resonance Rayleigh scattering method, 7.4 ng/mL for second-order scattering and 8.6 ng/mL for frequency-doubling scattering], respectively. Therefore, a new, high-sensitive method of resonance Rayleigh scattering and resonance non-linear scattering was developed to determine trace amount of lead. In this work, the characteristic of resonance Rayleigh scattering, second-order scattering and frequency-doubling scattering] spectra of the Alizarin red-cetylpyridinium bromide-Pb(II) system has been studied. Meanwhile, the influence of pH, resonance probe dosage, coexisting substances and other factors were investigated. The results show that the method exhibits a good selectivity, high sensitivity and easy operation. In addition, the mechanism of the enhancement of scattering spectra was discussed.
关键词： Resonance Rayleigh scattering,Lead,Cetylpyridinium bromide,Frequency doubling scattering,Alizarin red
更新于2025-09-04 15:30:14