2.4. Adsorption and photocatalysis

2.4. Adsorption and photocatalysis experiments
For Cr(VI) removal by adsorption and photocatalysis process, the
solution was prepared by dissolving potassium dichromate
(K2Cr2O7) in distilled water. In the adsorption process, five pieces of
TCF were placed in the chromium solution. The Cr(VI) solutions
were equilibrated in the dark. The samples were taken during the
time interval for Cr(VI) analysis to obtain the effect of pH and
adsorption isotherm. The adsorption capacity of each adsorption
experiment was calculated as the amount adsorbed Cr(VI) on the
surface of TCF per gram of TCF used.
For photocatalytic process, prior to irradiation, the TCF was
placed in a solution in 1000 mL of photocatalytic reactor. The solution
was illuminated by a 10 W germicide lamp with a nominal
wavelength range of 254 nm located at the centre of the reactor. Air
was bubbled through the reaction solution to ensure a constant
supply of nitrogen gas and to give agitation effect to achieve an
equilibrium state of Cr(VI) and TCF. The dark adsorption was conducted
until it reached equilibrium and, then, a lampwas turned on
to illuminate the TCF for 180 min. The Cr(VI) solution was agitated
thoroughly by the magnetic stirrer. The 1.0 mL of the sample after
illumination was syringed out for Cr(VI) analysis using a 1.5-
diphenylcarbarzide (BDH) colorimetric method (Zhou et al.,
1993). The Cr(VI) determination was measured at the absorbance
at 540 nm in acid solution with a PerkinElmer Lambda 20 UVevis
spectrometer. The residual Cr(VI) concentration in the aqueous
solution was plotted as a function of time. The observed rate constant
(kobs) from each experimental condition was calculated. All
experiments in the adsorption and photocatalytic reactions were
duplicated.

ผลลัพธ์ (อังกฤษ) 2:

2.4. Photocatalysis and adsorption experiments
For Cr (VI) adsorption and Removal by Photocatalysis Process, the
Solution was prepared by dissolving potassium dichromate
(K2Cr2O7) in distilled Water. In the adsorption Process, Five pieces of
TCF were Placed in the chromium Solution. The Cr (VI) Solutions
were equilibrated in the Dark. The samples were taken during the
time interval for Cr (VI) to obtain the Analysis Effect of pH and
adsorption isotherm. The adsorption capacity of each adsorption
experiment was calculated as the amount adsorbed Cr (VI) on the
surface of TCF per Gram of TCF used.
For photocatalytic Process, prior to irradiation, the TCF was
Placed in a Solution in 1000 mL of photocatalytic Reactor. The Solution
was Illuminated by a 10 W Germicide Lamp with a nominal
wavelength of 254 NM Range located at the Centre of the Reactor. Air
was bubbled Through the Reaction Solution to ensure a Constant
Supply of Gas nitrogen and agitation to give Effect to Achieve an
equilibrium State of Cr (VI) and TCF. The Dark adsorption was conducted
until it reached equilibrium and, then, a Lampwas turned on
to illuminate the TCF for 180 min. The Cr (VI) Solution was agitated
thoroughly by the Magnetic stirrer. 1.0 mL of the sample after the
illumination was syringed out for Cr (VI) using a 1.5 Analysis
Diphenylcarbarzide (BDH) colorimetric method (Zhou et al.,
The 1,993th). The Cr (VI) determination was measured at the absorbance
at 540 NM in acid Solution with a PerkinElmer Lambda 20 UVevis
Spectrometer. The residual Cr (VI) concentration in the aqueous
Solution was plotted as a function of time. The observed rate Constant
(Kobs) from each experimental condition was calculated. All
experiments in the adsorption and photocatalytic reactions were
Duplicated.