Abstract
In this paper CuO-NH-NH2 nanoparticle was synthesized and used to remove anionic dyes from single and binary systems. The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Energy-dispersive X-ray spectroscopy (EDAX) and X-ray diffraction (XRD) were used to characterize the nanoparticle. Direct Red 80 (DR80) and Direct Green 6 (DG6) were used as anionic dyes. The effect of adsorbent dosage, dye concentration and pH on dye removal was evaluated. Kinetic of dye adsorption followed pseudo-second order for single and binary system. The results showed that the experimental data were correlated reasonably well by Langmuir and Freundlich isotherm in single and binary system, respectively. The maximum dye adsorption capacity (Q0) was 217.3913 and 250 mg/g for DR80 and DG6, respectively.
Keywords:
Introduction
Increasing attention has been paid over the years to the environmental problems related to industrial activities. More and more water is being consumed, due to industrial activity, while water supply has remained constant. This …show more content…
The chemical structure of dyes was shown in Fig. 1. All other chemicals were of analytical grade and obtained from Merck (Germany).
Fig 1
Synthesis of CuO and CuO-NH-NH2
Synthesis of CuO: 1 g of CuSO4.5H2O and 1 g of NaOH were dissolved under stirring in 90 mL of distilled water. The mixed solution was sealed in a glass bottle and kept static at 120 °C for 24 h, and then cooled to room temperature naturally. The final precipitate was washed with distilled water several times to remove the possible residues and then dried at 120 °c for 12 hr.
Synthesis of CuO-NH-NH2: 1 g of CuO and 1.5 mL of ? were poured into toluene and refluxed for 24 h at 250 °C. The precipitate was filtered, washed with toluene and deionized water and dried.
Physicochemical
In this paper CuO-NH-NH2 nanoparticle was synthesized and used to remove anionic dyes from single and binary systems. The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Energy-dispersive X-ray spectroscopy (EDAX) and X-ray diffraction (XRD) were used to characterize the nanoparticle. Direct Red 80 (DR80) and Direct Green 6 (DG6) were used as anionic dyes. The effect of adsorbent dosage, dye concentration and pH on dye removal was evaluated. Kinetic of dye adsorption followed pseudo-second order for single and binary system. The results showed that the experimental data were correlated reasonably well by Langmuir and Freundlich isotherm in single and binary system, respectively. The maximum dye adsorption capacity (Q0) was 217.3913 and 250 mg/g for DR80 and DG6, respectively.
Keywords:
Introduction
Increasing attention has been paid over the years to the environmental problems related to industrial activities. More and more water is being consumed, due to industrial activity, while water supply has remained constant. This …show more content…
The chemical structure of dyes was shown in Fig. 1. All other chemicals were of analytical grade and obtained from Merck (Germany).
Fig 1
Synthesis of CuO and CuO-NH-NH2
Synthesis of CuO: 1 g of CuSO4.5H2O and 1 g of NaOH were dissolved under stirring in 90 mL of distilled water. The mixed solution was sealed in a glass bottle and kept static at 120 °C for 24 h, and then cooled to room temperature naturally. The final precipitate was washed with distilled water several times to remove the possible residues and then dried at 120 °c for 12 hr.
Synthesis of CuO-NH-NH2: 1 g of CuO and 1.5 mL of ? were poured into toluene and refluxed for 24 h at 250 °C. The precipitate was filtered, washed with toluene and deionized water and dried.
Physicochemical