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제올라이트(NaA형, NaX형)의 이온교환성에 관한 연구
정순희,김복련,금경호,서양곤,안주현 경상대학교 환경보전연구소 2001 環境保全硏究所報 Vol.9 No.-
A study has been made of the exchange of Ag^+, Li^+, and Ba^++, Ca^++, Sr^++ ion by using synthetic zeolite-13X and zeolite-NaA. The zeolite used in this work was supplied as beads by Aldrich Chemical Company, Inc., and the formula of unit cell is M_x/n[AlO₂)_x(SiO₂)_y]zH₂O. X-ray diffraction analysis and Fourier transform infrared spectroscopy indicated that the crystallinity of zeolites was retained though sodium ion in zeolite exchanged with the cation. The amount of ion exchanged was measured by the determining of the amount of cation remained in solution by Inductively coupled plasma, and surface area, adsorption isotherm, Ion exchange kinetics. The selectivity of ions was in the order Ag^+>Li^+>Sr^++>Ca^++>Ba^++.
學校周邊騷音에 대한 學生意識構造 조사 : 대구지역 고등학교 2학년을 대상으로
금경호,김복련,서양곤 경상대학교 환경보전연구소 2000 環境保全硏究所報 Vol.8 No.-
The purpose of this study was to investigate the students' consciousness against noise around nine high schools in Taegu City. It was carried out to make up and analyze a question of noise. The results are summarized as follows : 1. Two schools whose Leq was below 50㏈(A) showed comparatively little noise pollution from noise measurement of schools. Four schools, though their Leq was a little more than 50㏈(A), were supposed to have little complaint about noise because their TNI value was less than 50. Three schools was estimated to have extreme discontentment about noise because their Leq was more than 60㏈(A), so exceeded environmental standard value(50㏈(A)) and their TNI exceeded 70. 2. In questionaire, 61.2% of respondents answered that noise around school was very severe. The main sources of noise were street traffic(45.7%). In season the noise of summer was most severe(81.0%) The responsibility of noise was given to school(21.0%) and community(30.1%). The questionaire showed that damage to study was 56.2% in class, 24.8% in examination. The response to noise during class showed that most students studied bearing noise but 12.3% students gave up studying. About physical damage, 10% students answered 'a little severe' or 'severe', so physical damage was not serious. About mental damage, 30% students-answered 'a little severe' or 'severe', so three times large as the physical damage. As the result, today noise around school in Daegu cause great damage to students in school life, especially study and its psychological effect. Therefore, to live in a good sound environment the study of counterplans to noise around school must be continued.