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제올라이트와 슬래그계 물질을 이용한 암모늄, 카드뮴, 인산염의 동시 제거능 평가
김용우(Yong-Woo Kim),우희수(Hee-Soo Woo),박희수(Hee-Soo Park),이광헌(Gwanghun Lee),오명학(Myounghak Oh),박준범(Junboum Park) 한국토목섬유학회 2011 한국지반신소재학회 학술발표회 Vol.2011 No.4
The reactive vertical drain could be applied to man-made island constructed by dredged materials and waste landfill. However, these materials could be considered as main reason of multiple contamination such as ammonium, cadmium and phosphate. Therefore, the reactive vertical drain containing various materials is necessary to remediate many kinds of contamination mentioned above simultaneously. In this study, a series of batch test which consists of two process is performed. Zeolite, basic oxygen furnace slag and blast furnace slag are used as reactive materials. Ammonium, cadmium and phosphate are targeted for removal. As a result, zeolite-basic oxygen furnace slag or blast furnace slag sequence batch test shows the best efficiency for multiple contamination removal.
벤토나이트-해포석-구아검 혼합물질이 코팅된 제강슬래그의 해수에 대한 투수성 평가
정의석,이성수,우희수,박준범,Cheong, Eui-Seok,Rhee, Sung-Su,Woo, Hee-Soo,Park, Jun-Boum 한국지하수토양환경학회 2011 지하수토양환경 Vol.16 No.4
Bentonite has been generally used as vertical cutoff barrier material and reported to have several problems regarding its low workability, drying shrinkage cracking by particle cohesion, and ineffective waterproof ability under sea water condition. In this study, the particle sealant, the furnace slag coated by the mixture of bentonite, sepiolite and guargum, was developed to compensate these weak points and the hydraulic conductivity of the particle sealant was evaluated. Drying shrinkage cracking and swelling index was estimated to find the optimal mixing ratio of bentonite, sepiolite and guargum. The hydraulic conductivity of the particle sealants having different amount of sealant (bentonite-sepioliteguargum mixture) coating the furnace slag was estimated using the rigid wall permeameter and flexible wall permeameter. The results showed that drying shrinkage cracking was not found in the bentonite-sepiolite mixture with 20% sepiolite contents and the results from free swelling tests for the sealant having 1 : 0.025, 1 : 0.05 and 1 : 0.075 of weight ratios of bentonite-sepiolite mixture and guargum under simulated sea water condition were higher than those for the bentonitesepiolite mixture without guargum under tap water condition. These three sealants were coated on the furnace slag with 50% and 60% of sealant in the particle sealant and the hydraulic conductivity was estimated. In the cases of the particle sealants having 20% sepiolite in the bentonite-sepiolite mixture and 1 : 0.075 weight ratio of the bentonite-sepiolite mixture and guargum, the hydraulic conductivity from the rigid wall permeameter was below $1.0{\times}10^{-7}$ cm/sec under simulated sea water condition. The hydraulic conductivity of the particle sealant having $1.0{\times}10^{-6}$~$1.0{\times}10^{-7}$ cm/sec by the rigid wall permeameter was estimated using the flexible wall permeameter and found to be below $1.0{\times}10^{-7}$ cm/sec.
정헌섭(Jung, Heon-Seob),민병권(Min, Byung-Kwon),이성훈(Lee, Seong-Hoon),우희수(Woo, Hee-Soo),박현호(Park, Hyun-Ho) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.9
We considered an approach in terms of materials for improvement of insulation performance of vehicle rubber hoses. Ethylene propylene rubber(EPDM) for heater hoses in cooling system and acrylic rubber(AR) for intercooler hose in intake system were chosen for mixing for the vibration and noise performance. We modified EPDM and AR through changing compound of base polymer, reinforcement fillers and additives. Dynamic mechanical analysis(DMA) was used to measure viscoelastic properties such as shear modulus and loss factor($tan{\delta}$). Vehicle acceleration test was also conducted to observe indoor changes in insulation performance of hoses.