scholarly journals Efektifitas Penggunaan Karbon Aktif Sebagai Filter Kompresor Untuk Penyelam Tradisional

2019 ◽  
Vol 13 (2) ◽  
Author(s):  
Dwi Priyantini ◽  
Imroatul Farida
Keyword(s):  
Activated Carbon ◽  
Statistical Tests ◽  
P Values ◽  
Co2 Gas ◽  
Improve Health Status ◽  
Before And After ◽  
Activated Carbon Filter ◽  
Carbon Dioxide Levels ◽  
Carbon Filter ◽  
Improve Health

The livelihood of the Indonesian people in the prominent grasslands is fishermen. Traditional fishermen to get a lot of fish, they use it using respiratory aids. Safety, the working health of traditional divers who breathe the burnt compressor and need to be handled properly because it can cause health problems and even death. The use of carbon as a filter that allows you to improve health status and prevent the death of traditional divers. For this reason, this study aims to prove the effectiveness of using filter filters on traditional divers. The method used to determine the concentration of O2 & CO2 gas in the economy on examination using sample gas before and after being given an activated carbon filter with a sample of 20 respondents. Statistical tests using Mann Whitney. The use of activated carbon filters has no effect on respiratory aids in traditional divers as evidenced by the Mann Whitney test showing p values at oxygen levels = 0.842 and p values at carbon dioxide levels = 0.300 ((p> α = 0.05). Activated carbon cannot be used as a respiratory aid for traditional divers and settlement of divers in traditionally carrying out effective and routine maintenance. Keywords: Traditional Divers, Compressors, Filters, Activated Carbon

scholarly journals Physicochemical and sensory changes in aged sugarcane spirit submitted to filtering with activated carbon filter

2012 ◽  
Vol 32 (3) ◽  
pp. 471-477 ◽  
Author(s):  
Felipe Cimino Duarte ◽  
Maria das Graças Cardoso ◽  
Ana Carla Marques Pinheiro ◽  
Wilder Douglas Santiago ◽  
Leonardo Luna de Carvalho
Keyword(s):  
Activated Carbon ◽  
Aging Process ◽  
Filtration Process ◽  
Dry Extract ◽  
Yellow Color ◽  
Before And After ◽  
Activated Carbon Filter ◽  
High Concentrations ◽  
Carbon Filter ◽  
Sensory Tests

Sugarcane spirit is a drink considered as a national symbol of Brazil. It is produced by large producers and by about 30 thousand small and medium home-distilling producers dispersed throughout the country. The copper originating from the home-distillers can become a serious problem since at high concentrations in beverages it may cause serious human health problems. Therefore, the objective of this study was to investigate the influence of the activated carbon used in commercial filters on the physicochemical and sensory characteristics of aged sugarcane spirit. Analyses of copper, dry extract, alcoholic degree, higher alcohols, volatile acids, aldehydes, esters, furfural, and methanol were performed. The sensory evaluation was performed by seven selected trained judges, who analyzed the yellow color, woody aroma and flavor, and intensity of alcoholic aroma and flavor of the cane spirit before and after the filtration process. The sensory tests were carried out using a 9 cm non-structured intensity scale. A reduction was observed in all compounds analyzed physicochemically, except for the esters, which increased after filtration. This increase is probably due to the esterification of the alcohols and acids present. According to the sensory results obtained, a reduction was observed in the intensity of the yellow color, aroma, and wood flavor characteristics, the major characteristics of the aging process.

scholarly journals Validation of chemotherapy drug vapor containment of an air cleaning closed-system drug transfer device

2021 ◽  
pp. 107815522110306
Author(s):  
Galit Levin ◽  
Paul JM Sessink
Keyword(s):  
Activated Carbon ◽  
Closed System ◽  
Membrane Filter ◽  
Drug Transfer ◽  
Glass Vessel ◽  
Air Cleaning ◽  
No Release ◽  
Activated Carbon Filter ◽  
Carbon Filter ◽  
Transfer Device

Purpose The purpose of this study was to test the efficacy of ChemfortTM, an air filtration closed-system drug transfer device to prevent release of chemotherapy drug vapors and aerosols under extreme conditions. The air cleaning system is based on the adsorption of drug vapors by an activated carbon filter in the Vial Adaptor before the air is released out of the drug vial. The functionality of the carbon filter was also tested at the end of device’s shelf life, and after a contact period with drug vapors for 7 days. Cyclophosphamide and 5-fluorouracil were the chemotherapy drugs tested. Methods The Vial Adaptor was attached to a drug vial and both were placed in a glass vessel. A needle was punctured through the vessel stopper and the Vial Adaptor septum to allow nitrogen gas to flow into the vial and to exit the vial via the air filter into the glass vessel which was connected to a cold trap. Potential contaminated surfaces in the trap system were wiped or rinsed to collect the escaped drug. Samples were analyzed using liquid chromatography tandem mass spectrometry. Results Cyclophosphamide and 5-fluorouracil were detected on most surfaces inside the trap system for all Vial Adaptors without an activated carbon filter. Contamination did not differ between the Vial Adaptors with and without membrane filter indicating no effect of the membrane filter. The results show no release of either drug for the Vial Adaptors with an activated carbon filter even after 3 years of simulated aging and 7 days of exposure to drug vapors. Conclusions Validation of air cleaning CSTDs is important to secure vapor and aerosol containment of chemotherapy and other hazardous drugs. The presented test method has proven to be appropriate for the validation of ChemfortTM Vial Adaptors. No release of cyclophosphamide and 5- fluorouracil was found even for Vial Adaptors after 3 years of simulated aging and 7 days of exposure to drug vapors.

Enhancement of nuclease P1 production by Penicillium citrinum YL104 immobilized on activated carbon filter sponge

2014 ◽  
Vol 99 (3) ◽  
pp. 1145-1153 ◽  
Author(s):  
Nan Zhao ◽  
Hengfei Ren ◽  
Zhenjian Li ◽  
Ting Zhao ◽  
Xinchi Shi ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Penicillium Citrinum ◽  
Nuclease P1 ◽  
Activated Carbon Filter ◽  
Carbon Filter

Radioanalytical methods for sequential analysis of actinide isotopes in activated carbon filter-bed waste

2020 ◽  
Vol 326 (3) ◽  
pp. 1559-1568
Author(s):  
Bianca Geraldo ◽  
Leandro Goulart de Araujo ◽  
Roberto Vicente ◽  
Maria Helena Tirollo Taddei ◽  
Sandra Maria Cheberle ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sequential Analysis ◽  
Activated Carbon Filter ◽  
Filter Bed ◽  
Radioanalytical Methods ◽  
Carbon Filter

Biological Contamination Control of Activated Carbon Filter

2011 ◽  
Vol 183-185 ◽  
pp. 1123-1127
Author(s):  
Pei Chao Jian ◽  
Zhao Hui Zhang ◽  
Yu Feng Zhang ◽  
Qin Zhang
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Membrane Fouling ◽  
Alkali Treatment ◽  
Bacterial Count ◽  
Continuous Operation ◽  
Ultrasound Treatment ◽  
Biological Contamination ◽  
Activated Carbon Filter ◽  
Carbon Filter

Activated carbon filter is often used as the pretreatment process of nanofiltration or reverse osmosis membrane system, especially when the content of organics and free chlorine in influent water is high. However, a lot of microorganisms often rapidly reproduce in the activated carbon filter after continuous operation, resulting in a large number of bacteria in the effluent. So when the activated carbon filter was used as pretreatment of membrane systems, membrane fouling caused by biological contamination often occurred. The objective of this paper was to discuss how to effectively control the activated carbon biological contamination. Three different control methods—water backwashing, hot alkali treatment and ultrasound treatment were compared. Results showed that ultrasound treatment was the most effective. A relatively high removal efficiency of biomass (above 90%) was obtained when 40 kHz ultrasound was applied at 90 W for 20 min. Bacterial count in the effluent can be decreased from 3.90×104CFU•mL-1 to 8.5×103CFU•mL-1. After 3 days of continuous operation, bacteria count increased from 8.5×103CFU•mL-1 to 4.06×104CFU•mL-1. After ultrasound treatment, the removal efficiency of CODCr increased from -386.3% to 73.8%.

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