http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Arslan-Alaton, Idil (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Arslan-Alaton, Idil,Tureli, Gokce,Olmez-Hanci, Tugba Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.5
Treatability of synthetic Acid Blue 193 and Reactive Black 39 production wastewaters and real Reactive Black 39 production effluent via photo-Fenton-like process was investigated. The Central Composite Design technique was used to study the effect of some critical process parameters of the photo-Fenton process (e.g. reaction time, initial COD and $Fe^{3+}$ : $H_2O_2$ molar ratio) on synthetic Acid Blue 193 production wastewater treatment efficiency in terms of color, chemical oxygen demand (COD) and total organic carbon (TOC) removals. Selected process parameters were optimized to obtain maximum color, COD and TOC removal efficiencies. Optimum working conditions were established as 45 min reaction time and a $Fe^{3+}$ : $H_2O_2$ molar ratio of 0.073 for wastewater having an initial COD ($COD_o$) of $200\;mg\;L^{-1}$. Under these conditions, 99% color, 83% COD and 58% TOC abatements were experimentally obtained. In case of real Reactive Black 39 production effluent, photo-Fenton-like treatment efficiency was found to be considerably lower than that of the synthetic acid and reactive dye production wastewaters, which was attributable to the relatively high chloride (i.e. a well known $^{\cdot}OH$ radical scavenger) content of the real effluent.
-
Arslan-Alaton Idil,Koba-Ucun Olga,Farasat Shima 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.11
Simulated reactive dyebath effluent (pH≈11.0–11.5) bearing the commercially important textile azo dye Reactive Red 21 (100 mg/L) can be successfully decolorized via ozone (feed rate=72 mg/min) and peroxide (=0.75–6.00 mM)/ozone treatment processes. Persulfate (PS), peracetic acid (PAA) and percarbonate (PC) were selected as alternative oxidants to the more conventional hydrogen peroxide. Color (peak absorbance) and total organic carbon (TOC) removals increased with increasing PS concentration, but decreased when PC was introduced due to free radical scavenging effects of carbonate alkalinity. PAA improved color and TOC removal rates, but thereby also contributed to the TOC content of the dyebath effluent. PAA-assisted ozonation showed the highest performance in terms of color removal at an optimum PAA concentration (=1.5 mM). According to the gas phase-and-dissolved ozone measurements, addition of the peroxides PS-PAA enhanced ozone decomposition and increased ozone absorption rates whereas PC addition stabilized aqueous, molecular ozone. The originally non-toxic reactive dyebath effluent (≈10% relative inhibition) did not exhibit serious acute toxicity towards Vibrio fischeri photobacterium throughout ozonation and ozone/PS treatment, whereas a slight increase was observed for ozone/PAA-ozone/PC that decreased with applied ozone dose. The 7th-day-biochemical-oxygen-demand (BOD7; <10 mg/L) decreased with ozone dose speaking for less biodegradable oxidation products.
-
Olmez-Hanci, Tugba,Imren, Ceren,Arslan-Alaton, Idil,Kabdasli, Isik,Tunay, Olcay Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.5
This paper discusses the feasibility of the ultraviolet radiation-hydrogen peroxide ($H_2O_2$/UV-C) process as an advanced oxidation process (AOP) in the treatment of endocrine disrupting compounds (EDC). Dimethyl phthalate (DMP) was chosen as the model compound owing to its classification as an EDC. Experiments have been conducted at various pH values (3.5, 6.0 and 9.0) and initial $H_2O_2$ concentrations (0-60 mM) in a batch reactor equipped with a low-pressure mercury UV-C lamp in order to evaluate the optimal operation conditions of the $H_2O_2$/UV-C process. The most effective pH value for the degradation of DMP by $H_2O_2$/UV-C treatment was found as 6.0. DMP abatement increased with increasing $H_2O_2$ concentrations from 5 to 30 mM. Further increase in initial $H_2O_2$ concentration, however, reduced both the rate and extent of DMP removal as well as chemical oxygen demand (COD) and total organic carbon (TOC) removals. A simple kinetic model was proposed for DMP, COD and TOC abatements confirmed pseudo-first-order reaction. The electrical energy per order (EE/O) values for DMP oxidation and TOC mineralization were calculated as 3.3 and $19\;kWh\;m^{-3}\;order^{-1}$ respectively for the optimum treatment conditions ($H_2O_{2,o}$ = 30 mM, $pH_o$ = 6.0, $DMP_{o}\;=\;100\;mg\;L^{-1}$). Inhibition of oxygen uptake rate by activated sludge (ISO 8192) was evaluated as a tool for assessing the acute toxicity of untreated and $H_2O_2$/UV-C treated DMP. According to the results obtained in this work, the use of the $H_2O_2$/UV-C process is recommended to achieve a complete DMP oxidation and high mineralization degree of aqueous solution of DMP.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
