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김용무,이해익 강원대학교 농업과학연구소 2003 강원 농업생명환경연구 Vol.14 No.-
A high chromate selective biosorbent with high adsorption capacity was searched by examination of chromate adsorption capacities of 48 species of red, brown, or green marine algae sampled from east coast of Korea. As a result of screening, a red marine algae showed most excellent adsorption characteristics among them, and it was identified as Pachymeniopsis so.. It also showed high selectivity for chromate since it's adsorption capacity for other heavy metal ions such as cadmium and manganese ions was relatively low. The investigation of adsorption isotherms of dried powder of the Pachymeniopsis sp. for chromate adsorption at 25℃ showed Langmuir type dependence. The maximum chromate adsorption capacity of selected algae was about 198 mg/g.
전자폐기물을 잔골재로 적용한 콘크리트의 역학적 특성에 관한 연구
김용무,최소영,김일순,양은익 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 논문집 Vol.22 No.2
The quantities of electronic waste have been increased rapidly, and was caused variety problems such as environmental pollution or dissipation of resource. So, it needed to development of recycling technology about heavy metal in the electronic waste. Meanwhile, filler material (concrete or mortar) was used for shielding radioactive waste, however, it did not used materials that it is proved radiation shielding performance. So, there is a lack of confidence in the shielding performance. Therefore, in this paper, mechanical properties of concrete was evaluated for the applicability using electronic waste as fine aggregate of filler material. From the test results, compressive and flexural strength and elasticity modulus and the micro pore in the 1μm range was significantly affected by substitution of electronic waste, however, it could be improved the performance by using mineral admixture as binder. So, it is shown that the electronic waste could be applicable as fine aggregate of filler material. 전자폐기물의 발생량이 급증하고 있고, 전자폐기물로 인한 환경오염 혹은 자원낭비등과 같은 문제를 야기하고 있다. 따라서 전자폐기물 안에 포함된 중금속을 재활용할 수 있는 기술 개발이 필요하다. 한편, 채움재(콘크리트 혹은 모르타르)는 방사성폐기물의 차폐를 위해 사용되나, 방사성 차폐 성능을 확보한 재료를 적용하고 있지 않다. 따라서 채움재는 차폐성능에 관한 신뢰가 부족한 상황이다. 그러므로 본 연구에서는, 전자폐기물을 채움재의 잔골재로 적용하기 위하여 콘크리트의 역학적 특성을 평가하였다. 실험결과, 압축강도, 휨강도, 탄성계수 및 1μm 영역의 공극이 상당히 영향을 받는 것으로 나타났으나, 광물질 혼화재를 결합재로 사용하면 성능이 개선되었다. 따라서 전자폐기물은 채움재의 잔골재로써 적용이 가능할 것으로 판단된다.