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RISS 인기검색어
- 검색키워드
- 저자 : N.Essam (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Use and Evaluation of Lignin as Ion Exchangers
Essam. N. Ads,A. M. A. Nada,A. M. El-Masry 대한화학회 2011 대한화학회지 Vol.55 No.1
Modified lignins were prepared. Soda and peroxy lignins were precipitated from black liquor produced from bagasse pulping with soda and peroxyacid pulping process. The precipitated lignins were hydrolyzed using 10% HCl. Different functional groups were also incorporated into lignin by carboxylation and phosphorylation reactions. Moreover crosslinking of these lignins were carried out using epichlorohydrin. Characterization of the modified lignins and lignins derivative were carried out using Infrared spectroscopy. Thermal analysis of these compounds were also carried out using TGA and DTA techniques. Efficiency of sorption of metal ions by the modified lignin was also investigated. It was found that, the peroxylignin and its derivatives show higher efficiency toward metal ions uptake than the soda lignin.
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Use and Evaluation of Lignin as Ion Exchangers
Ads, Essam.N.,Nada, A.M.A.,El-Masry, A.M. Korean Chemical Society 2011 대한화학회지 Vol.55 No.1
수산화나트륨과 과산화 무기산을 사용하여 흑색 액체로부터 수산화 리그닌과 과산화 리그닌을 얻었다. 과산화 리그닌을 10% HCl을 사용하여 가수분해하여 가수분해 리그닌을 얻었다. 카르복실화와 인산화과정을 거쳐 카르복시 리그닌과 인산화 리그닌을 얻었다. 에피클로르히드린을 사용하여 가교 리그닌도 얻었다. 이들 얻어진 리그닌들을 적외선분광법, 열김량분석, 시차열분석법으로 분석 하였다. 이들 얻어진 리그닌의 금속이온 흡착효과를 조사하였다. 과산화 리그닌이 수산화된 리그닌 보다 흡착 능력이 우수하였다. Modified lignins were prepared. Soda and peroxy lignins were precipitated from black liquor produced from bagasse pulping with soda and peroxyacid pulping process. The precipitated lignins were hydrolyzed using 10% HCl. Different functional groups were also incorporated into lignin by carboxylation and phosphorylation reactions. Moreover crosslinking of these lignins were carried out using epichlorohydrin. Characterization of the modified lignins and lignins derivative were carried out using Infrared spectroscopy. Thermal analysis of these compounds were also carried out using TGA and DTA techniques. Efficiency of sorption of metal ions by the modified lignin was also investigated. It was found that, the peroxylignin and its derivatives show higher efficiency toward metal ions uptake than the soda lignin.
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Future Voyage Data Recorder Based on Multi-Sensors and Human Machine Interface for Marine Accident
I. Morsi,M. S. Zaghloul,N.Essam 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
Voyage data recorders (VDR) enable accident investigators to review procedures and instructions before an incident and help to identify the cause of any accident. The Future data recording should be capable of recording data audio and video during day and night. The recording should be of high integrity, digital as well as independent of ship supplies. Voyage data recorder, popular name black- box, is used for recording all kinds of navigation information. VDR is a data recording system designed for all vessels required to comply with the International Maritime Organization IMO"s and International Convention safety of life at sea SOLAS requirements (IMO). Data from various sensors on board the vessel is collected, digitized, compressed and then stored in an externally mounted protective storage unit. The protective storage unit is a tamper-proof unit designed to with stand the extreme shock impact, pressure and heat, which could be associated with a marine incident (fire, explosion, collision, sinking, etc). This research realizes the importance of obtaining these stored data for accident analysis. This paper considers a real case accident, by downloading and replaying the data of real black box for a sunken ship in the red sea. Eventually, video recorded data of the accident will be more helpful to the investigation.
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