Removal of Pb(Ⅱ), Cu(Ⅱ), Cr(Ⅲ) and Zn(Ⅱ) ions from aqueous solutions using the adsorption process on domestic loess minerals has been investigated. Variations of contact time, pH, adsorption isotherms and selectivity of coexisting ions and leachate were experimental parameters. YDI, YPT and KRT samples diluted in 1% aquous solution which was adjusted pH 10.8, 8.0 and 6.50, respectively. The result of XRD measurement, Quartz was mainly observed in all samples. In the case of KRT sample, Kaolinite, Feldspar, Chlorite consisting of clay minerals shows almost same pattern with YPT samples. Different properties showed from the YDI sample containing Iillite, remarkably.For all the metals, maximum adsorption was observed at 30min ∼ 60min. Adsorption of metal ions on loess minerals were reached an equilibrium by shaking the solution for about 30min. Removal efficiency of Pb(Ⅱ) ion for KRT, YPT and YDI were 84.7%, 92% and 100%, respectively. The Cu(Ⅱ) and Zn(Ⅱ) adsorptivity on KRT showed the low in various pH solution However, those on YPT and YDI were high than 90% except for the pH 2 solution. The orders of adsorptivities for domestic loess minerals showed as following : YPT>KRT>YDI. The adsorption isotherms of Cu(Ⅱ) and Zn(Ⅱ) ions on clay minerals were fitted to a Freundlich's. Freundlich constants(1/n) of KRT and YPT domestic loess minerals were 0.63, 0.97 and 0.36, 0.25, respectively.

본 시험은 경사가 있는 미숙의 개간전에서 참깨의 증수방법을 개선하고자 주요 염기영양소의 시용과 적심시기를 다리한 병합처리효과를 구명하였던 바 그 결과를 요약하면 다음과 같다. 1. 염기영양소+적심처리의 병합방법은 적심만의 단일처리에 비하여 그 효과각 인정되었으며, 2. 염기영양소+발아후 50일 적심의 병합처리는 일반관행에 비하여 46%가 증수되었다. 3. 적심만의 단일처리효과는 일반관행에 비하여 17% 증수효과만을 나타냈으며, 4. 적심만의 단일효과는 절수, 분지수, 삭수 및 천립중 증가에 영향을 주었으나, 5. 염기영양소+적심의 병합처리는 작물체의 건경엽중 및 천립중의 증가도를 더욱 높여 증수를 가져오는데 한층 효과적이었다.