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An investigation on modification of natural zeolite with ZnO for the degradation of tartrazine. In this study, ZnO as a semiconductor is modified into a natural zeolite as support to form ZnO/zeolite that can increase the efficiency degradation of tartrazine. Further, the formed catalyst was added to tartrazine by determining the variation in ozonolysis time, the amount of addition of the catalyst, and the addition of a catalyst time. The results of degradation were determined by UV-Vis spectrophotometer at 424 nm. The result showed that the percentage of degradation obtained on each catalyst in the degradation. The resulted percent degradation of 20 ml of tartrazine at concentration of 15 mg/L using 20 mg ZnO/zeolite was 56.80%, while using 0.77 mg ZnO was 42.25%, and with the addition of 19.23 mg of Zeolite was 31.18%, all of that condition was proceeded by 40 minutes of ozonolysis. Thus, the result indicates that the ZnO/zeolite catalyst can increase percentages of tartrazine degradation by ozonolysis. It is known that the catalyst ZnO/zeolite is very effective in increasing the degradation of tartrazine. Analysis of tartrazine compounds using fourier-transform infrared spectroscopy (FTIR) after degradation changes in wavenumber indicates that there is a breaking of the bonds of tartrazine compounds. Characterization of ZnO/zeolite catalyst using FTIR, X-Ray diffraction (XRD) and scanning electron microscope (SEM), in each spectrum there was no shift, indicating that there is no change in ZnO/zeolite structure

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Permethryn is a synthetic pyrethroid pesticides which is lees toxic to mammals and very toxic to fish, water insects and microorganisms. The permethryn compound degradation research had been done by sonolysis method using natural zeolyte supported TiO 2-anatase as catalyst on the treatment of certain condition. Degradation is done sonolysis method using ultrasonic wave with at frequency 45 KHz. The samples are permethryn 96,1 % and narural zeolyte supported TiO 2-anatase as catalyst which can accelerate the degradation quickly and efficiently. Meanwhile, UV spectrophotometer is used to analyze samples at a wavelength of 272 nm. As a result, using the sonolysis could degrade the permethryn compound 20 mg/L at 40 o C and 120 minutes of irradiation time, without the addition of natural zeolyte supported TiO 2-anatase reached 22,23 %, and the degradation permethryn 20 mg/L at 40 o C and irradation time 75 minutes with the addition of 50 mg natural zeolyte supported TiO 2-anatase up to 81,10 % by 75 minutes of radiation time.

The use of the chicken eggshell with its membrane as low-cost adsorbent had been done to the removal of synthetic dyes in aqueous solution. Adsorption method in the batch system was done to adsorb Methylene Blue and Indigo Carmine as the cationic and anionic dyes. Some parameters were studied such as pH, contact time, initial concentration of dyes and mass of ES+M to find the optimum adsorption. The functional group of ES+M like hydroxyl, amine, carboxyl and thiol were used to binding the dyes. The characteristics of ES+M were determined by FTIR and XRF to analyzed functional group and elements composition before and after adsorption. The adsorption capacity optimum of ES+M to adsorb Methylene Blue was 11.54 mg/g with % RE 92.34% in 30 minutes, and Indigo Carmine was 8.04 mg/g with % RE 64.34% in 15 minutes.