http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 신현무 (검색결과 55 건)
- 무료
- 기관 내 무료
- 유료
-
-
연속추출법에 의한 폐광산 지역의 중금속 오염토양의 용출 가능성 평가
신현무 慶星大學校 環境問題硏究所 1999 環境硏報 Vol.9 No.1
Soils were sampled from two abandoned metal mines and analyzed by Korea Soil Analytical Method(KSAM) and the sequential extraction procedure(SEP). In order to evaluate the potential leaching possibility, the results obtained by two kinds of analytical methods were compared. Almost heavy metal concentrations analyzed by KSAM were much higher than summed fractions of water soluble and exchangeable, which was extremely low and useable fraction by plants. It indicated that those fractions were leached for a long time by soil weathering processes. Thus, almost residual fractions after weathering processes were composed of organic bound, carbonate bound, sulfide bound, and crystal form and not readily dissolved by rain water. The total concentrations of each fraction by SEP were higher than those of KSAM, which demonstrated that analysis by KSAM could overestimate the potential leaching fraction.
-
-
TiO₂와 토양 유기물에 의한 Cr(VI)의 환원 반응
신현무 慶星大學校 1998 論文集 Vol.19 No.1
Through the reduction reaction of Cr(VI) with soil organic matter such as humic acid, and the adsorption of humic acid and Cr(VI) to TiO2 which was known as excellent surface catalyst, following results could be obtained. In the Cr(VI) reduction reaction with humic acid, the reaction occured under the acidic condition and the rate proceeded faster with increasing humic acid concentration. In the comparison between the reduction and oxidation environment for Cr(VI) reduction, even if there was observed no significant difference, the reaction was somewhat faster in the reduction environment than in the oxidation one. The adsorption of humic acid to TiO₂ surface was followed the S type of adsorption isotherm, which indicated that the adsorption was multilayer coverage. Therefore, humic acid adsorption was low in the low concentration of solute and adsorption increased with increasing humic acid concentration in solution. In effect of pH on the adsorption of Cr(VI) to TiO2, the adsorption of Cr(VI) occured at pH below 7 and increased significantly with decreasing pH.
-
동전기를 이용한 유수지 오염 퇴적토내 Cd, Pb 및 Cr제거
신현무,Shin, Hyun-Moo 한국지하수토양환경학회 2009 지하수토양환경 Vol.14 No.1
본 연구에서는 토양수세법의 적용이 곤란한 낮은 투수성의 중금속오염이 심각한 E 유수지의 퇴적토에 대하여 동전기법의 적용성을 검토하였다. 이를 위하여 퇴적토 내 총 Cr, Pb,Cd농도 및 퇴적토의 물리화학적 특성을 조사하고, 또한 BCR 연속추출법을 통하여 동전기복원 전후 중금속들이 어떤 형태로 존재하는지를 살펴봄으로써 오염 퇴적토 내 중금속의 처리 가능부분에 대한 평가 하였다. 동전기를 적용한 결과, 총 Cr 및Pb는 양극 쪽으로 이동하였으며, 반면 Cd의 경우는, 동전기정화 전 대부분이 이온교환/탄산염 결합태를 차지하고 있어 제거가 용이할 것으로 판단되었지만, 양극 쪽 보다는 토양 체의 중간에 가장 높게 그리고 전체적으로 음극 쪽으로 이동하는 경향을 보이고 있다. 이 때, 양그 쪽의 총 Cr농도는 초기 농도보다 약 3.5배 증가한 반면, 음극 쪽에서는 대부분 제거되고 매우 낮은 경향을 나타냈다. 동전기복원전과 처리 후 퇴적토 내 중금속 결합형태를 각 구간 중 양극부분과 음극부분과 비교한 결과, 총 Cr은 잔류태가 양극과 음극 쪽에서 감소한 반면, 산화물 태는 증가한 경향을 보였다, Pb의 경우도 반응 전에 비해 반응 후 반잔류태 부분이 감소하고 산화물 태 부분이 다소 큰 폭으로 변화된 것을 나타내고 있었으며, 양극 부분 보다는 음극부분에서 분율이 증가되어있다. 그러나 Cd는 반응 전 대부분을 차지하던 이온교환/탄산염 결합 태부분은 양극과 음극부분에서 모두 감소한 것으로 나타난 반면 반응 전 무시할 정도로 낮았던 잔류 태 부분 및 산화물 태가 증가한 경향을 보였다. For the reservoir sediment highly contaminated with total Cr, Pb, and Cd, the applicability of electrokinetic remediation method was evaluated. Also, BCR sequential extraction method was adopted to compare the heavy metal speciation in between before and after electrokinetic reaction that is operated under constant current condition for the sediment. After reaction, total Cr and Pb moved toward the direction of anode, while Cd tended to cathode and stayed highest in the midst of sediment specimen. From the BCR sequential extraction analysis, it was known that for total Cr and Pb the residual fraction that showed high fraction before reaction decreased and changed to the oxidation fraction. On the other hand, for Cd the fraction of exchangeable/carbonate that dominated most fractions before reaction changed to the residual and oxidation fractions.
-
신현무,윤삼석,이창언 慶星大學校 環境問題硏究所 2002 環境硏報 Vol.12 No.1
In order to evaluate the characteristics of heavy metal adsorption to soil, three kinds of heavy metals (Pb,Cu,Cd), commonly existing in abandoned mine area, were selected and use for adsorption experiments. Through the adsorption kinetics, Cu^2+ and Cd^2+ were reached to pseudo-equilibrium state within I hour, whereas Pb^2+ was within 3 hours. The result of adsorption isotherm demonstrated that the Freundlich model was more suitable than Langumuir in explanation of selected metals adsorption and K_F value was in the order of Pb^2+> Cu^2+> Cd^2+. All selected metals adsorbed to soil more than 80% in the range of pH above 4.
-
용출시험방법에 따른 도시 하수 슬러지 소각재의 중금속 용출 비교
신현무 慶星大學校 1998 論文集 Vol.19 No.2
Sewage sludges generated from municipal sewage treatment plants in Pusan metropolitan city were used for studying the metal extractability by different extraction methods, KS, EP Tox, TCLP, and MEP. In the comparison of the results associated with three extraction methods, no significant problems was found out in use of current KS extraction method for the estimation of hazard of wastes. From the extraction by MEP methods, which is the measure for the evaluation of extractability in the acidic rainy condition, the leaching of metals was negligible but the of Cu. leaching rate of heavy metals was decreased with pH increase.
-
-
Cu, Pb, 및 Cd로 오염된 토양의 동전기적 방법에 의한 제거에 있어 중금속 종이 미치는 영향
신현무,윤삼석 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1
Three kinds of toxic heavy metals, such as lead, copper, and cadmium, existing abundantly in contaminated soils were selected to investigate pH change, electroosmotic flow, and the removal rate in the application of electrokinetic process. In the change of pHs, they reached to about 12 and 2 at each cathodic and anodic region, respectively, and maintained for reaction being proceeded. Electroosmotic flow rates were not influenced by the kind of metal species but by electropotential gradient. On the soils contaminated by each metal, the removal rate of Cd was the fastest among three as in the order of Cd>Pb>Cu. While on the soils contaminated by mixed metal species, Cu was the fastest. Metal species transported by electrokinetic processes were distributed in between 0.9 and 1.0 of normalized region. In the case of soils contaminated by one kind of metal. the relative concentrations of Pb and Cd estimated in between normalized region 0.9 and 1.0 were 5.2 and 5.7, respectively.
-
TEL(Tetraethyllead)의 토양흡착에 대한 온도 및 토양/용액 비의 영향
신현무 慶星大學校 環境問題硏究所 1996 環境硏報 Vol.6 No.1
In order to understand the concentration of TEL in soiln and solution phase, TEL adsorption experiments were carried out under various soil/solution ratios and different temperature conditions. The results demonstrate that the lower the soil-solution ratio is the greater the TEL adsorption onto soil is and the partition coefficient decreased with increasig soi-solution ratio. Also, TEL adsorption results with respect to different temepratures indicated that the amount of TEL adsorbed increased with increasing temperature.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
