메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색

논문 기본 정보

자료유형
학술저널
저자정보
Einschlag, Fernando S. Garcia (Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas [INIFTA], Departamento de Quimica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata) Felice, Juan I. (Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas [INIFTA], Departamento de Quimica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata) Triszcz, Juan M. (Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas [INIFTA], Departamento de Quimica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata)
저널정보
한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제7호
발행연도
2009.1
수록면
953 - 960 (8page)

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색

초록· 키워드

오류제보하기
In the present work we analyze the degradation rates of nitrobenzene (NBE) and 4-nitrophenol (PNP), by using UV irradiation in the presence of $HNO_2/NO_2^{-}$ or $NO_3^{-}$ added as sources of hydroxyl radicals. With both nitroaromatic substrates pseudo-first-order kinetics were observed for conversion degrees of at least 45% within the analyzed experimental domain. The apparent rate constants ($k_{app}$) were higher for UV/$NO_3^{-}$ systems than for UV/$HNO_2/NO_2^{-}$ systems at high additive concentrations, whereas the opposite trend was observed for low additive concentrations. In addition, $k_{app}$ values were found to decrease with increasing substrate concentration. The analysis of the distribution of the most important products detected by HPLC suggests that reactions involving nitrogen species are likely to play a secondary role in the apparent rate constants measured. NBE and PNP degradation rates induced by $HNO_2/NO_2^{-}$ photolysis increase to a maximum value and then decrease with increasing additive concentration. On the other hand, substrate degradation rates increase with $NO_3^{-}$ concentrations until a plateau is reached, but no decrease of $k_{app}$ is observed even at very high additive concentrations. The results may be quantitatively described by a simplified model that considers two opposite effects. On the one hand, the increase of additive concentrations increases the amount of photons absorbed by the photoactive species in both systems. On the other hand, high additive concentrations significantly decrease the degradation rates in UV/$HNO_2/NO_2^{-}$ systems where $HNO_2$ and $NO_2^{-}$ are efficient hydroxyl radical scavengers, whereas this decrease is not observed in UV/$NO_3^{-}$ systems since the scavenging ability of $NO_3^{-}$ is much lower. Inner filter and scavenging effects are discussed and the results are compared with the ones previously reported for UV/$H_2O_2$ systems.

목차

등록된 정보가 없습니다.

참고문헌 (0)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

이 논문의 저자 정보

최근 본 자료

전체보기

댓글(0)

0