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염화철(Ⅲ)처리 활성탄을 이용한 수중의 질산성질소 제거
유찬서 ( Chan-seo You ),정승광 ( Seung-gwang Jeong ),정정조 ( Cheong-jo Cheong ),정상철 ( Sang-chul Jung ),이경동 ( Gyeog-dong Lee ),라덕관 ( Deog-gwan Ra ) 한국환경기술학회 2009 한국환경기술학회지 Vol.10 No.3
염화철(Ⅲ)처리 입상 활성탄을 제조하여 수중에 존재하는 질산성질소의 제거 방안에 대하여 검토하였다. 염화철처리 활성탄은 일반 활성탄에 비하여 표면에 피흡착질을 축적할 수 있는 수많은 세공들이 관찰되었다. 질산성질소 제거율은 염화철처리 활성탄 첨가량 20g/L에서 96.2%로 가장 높았고, pH변화에 따른 질산성질소 제거율은 큰 차이가 질산성질소 나타나지 않았다. 온도가 증가할수록 질산성질소의 제거율은 감소하는 경향을 나타냄으로써 반응이 발열반응임을 확인할 수 있었다. 제거를 위한 적정 온도는 10℃이었으며, 그때 제거율은 96.2%를 나타냈다. 흡착등온식은 Freundlich식이나 Langmuir식으로 표현이 가능하였다. In order to remove the resolved nitrate in natural water, this study was carried out to investigate the nitrate removal efficiency by using an Iron chloride(Ⅲ) treated activated carbon. The treated activated carbon could be observed a lot of porosity better than conventional activated carbon that showed an elevated capacity of pollutant accumulation on its surface. The highest nitrate removal efficiency was recorded to 96.2 % by adopting of 20 g/L the treated activated carbon. Though the removal efficiency was not affected by pH variation, it showed a tendency in inverse proportion to water temperature. So this process was known to be an exothermic reaction, and optimum temperature in order to get 96.2 % nitrate removal efficiency was concluded to be 10℃. Additionally, the nitrate adsorption reaction between nitrate and Iron chloride(Ⅲ) treated activated carbon was well able to followed to Langmuir and Freundlich adsorption isotherm.
정승조 원광대학교 2007 圓光軍事論壇 Vol.- No.3
Despite the international and domestic disputes, it has already been 4 years since the ROK deployment in Iraq. Today, the Zaitun Unit is successfully carrying out mission in Arbil (아르빌), under the praise of the locals and multinational forces. Following the request of the U.S., our government has deliberately reviewed deploying forces in Iraq in multiple angles. The main purpose of our deployment was to contribute to the peace and stability in Iraq and the Middle East. further develop the ROK-U.S alliance into a more profound relationship, and improve our national status and image on peace. Additional deployments were pursued under the consideration of the public opinion, reports of site survey groups. and characteristics and capabilities of the ROK military. Until now, the deployment has been annually extended with the approval of the National Assembly. To summarize the achievements of the deployment, first, we are providing a model for the most successful civil operations. Second, this has become an opportunity to strengthen Korea's global image in areas such as politics, diplomacy. military. and economy. Lastly. our forces were able to gain experience in stability operations, advance our airlift operation capabilities in foreign warfare, and improve our mission execution capabilities such as forming and managing an analysis team for lessons of war. The encouragement and confidence of our people and the endless interest and support of our military and government are the main reasons behind the success of our contingent in Iraq. There are more tasks to develop in order to expand on such achievements. First. the conditions for the termination of deployment should be promptly reviewed and a roadmap for future deployment must be drawn up. Secondly, further review should be carried out on regulations and policies regarding foreign deployment. An image of a powerful military through foreign deployment should be recognized internationally and domestically. Lastly, the public should be more aware and informed of the achievements made through the deployment in Iraq. Peace Keeping Organizations should become more involved so that the prosperity of world peace and security on the Korean peninsula have a synergy effect on one another, and Korea develops its national brand as a peace-loving nation.