Overview of Salt Effect of Fertilizer on Nano-Silver Application in Soil

양재의,김상철,김동국 한국토양비료학회 2009 한국토양비료학회지 Vol.42 No.4

Silver nanoparticles have been used in agricultural practice because of their biocide effect. However, limited information is available for the effect of silver nanoparticles on soil quality. Therefore, the main purpose of this study was to evaluate effect of silver nanoparticle application on soil especially when fertilizer is applied. To simulate potassium fertilizer, potassium chloride was mixed with silver nanoparticles in soil. Concentration of silver and chloride was measured and result showed that concentration of both compounds was decreased at the range of 3.4mg kg-1 and 78-84% respectively after treatment. In addition, analysis of microbial population after treatment showed that microbial population was increased when silver nanoparticles and KCl were mixed. Those results indicated that application of fertilizer has impact on biocide effect of silver nanoparticles in soil.

Fertility Status in Northeastern Alpine Soils of South Korea with Cultivation of Vegetable Crops

양재의,조병옥,신영오,김정제,Yang, Jae-E.,Cho, Byong-Ok,Shin, Young-Oh,Kim, Jeong-Je Korean Society of Soil Science and Fertilizer 2001 한국토양비료학회지 Vol.34 No.1

Total upland area for cultivating the vegetable crops in the Alpine soils of Northeastern South Korea has been extending its limit to meet the increasing demand of vegetable food in recent decades. About 70% of these alpine soils are located in over 7% of the slope and most of vegetable crops have been cultivated intensively without practicing the best management systems. Thus, soil erosion and continuous cropping system have degenerated the soil fertility and shown detrimental effects on water quality. We initiated an intensive and extensive investigation to characterize the fertility problems encountered in these uplands. Objectives of this paper were to characterize the fertility status in the Alpine soils cultivated with vegetable crops for many years and to provide the recommendations for adequate soil management measures including fertilization and erosion control. Soils in general have good drainage with textural classes of loam or sandy loam. Their topographical characteristics tended to lead them to shallow plow layers, and the steepness of the terrain created erosion hazard. Of the soils examined, about 11% of uplands over 30% gradient was found in need of an urgent reforestation. A high content of gravel and firm hardness of soil attributed to inhibit the utilization of farm machinery and plant-root development. The average soil pH 5.6 was slightly low relative to pH 5.70 of the national average. Organic matter content was high compared with 2.0% of national average, but decreased with the prolonged cultivation periods. Available $P_2O_5$ concentration was unusually high due to the consequence of over dose application with chemical and organic fertilizers. Exchangeable cations as Ca, Mg, and K were appeared to be decreased in these regions with prolonging the cultivation periods. There were no significant differences in cation exchange capacity (CEC) and electrical conductivity (EC) among locations. Heavy metal contents were mostly lower than the threshold of danger level designated by Soil Environment Conservation Law of South Korea. Results indicated that a proper countermeasure and the best management practice should be immediately implemented to conserve the top soil and fertility in the Alpine regions.

서사(序辭)

양재연(梁在淵) 국어국문학회 2012 국어국문학 Vol.- No.160

임산부산물 수피비료의 특성

양재의,Yang, Jae-Ui 한국조경수협회 1995 造景樹 Vol.25 No.3

Fractionation and Pollution Index of Heavy Metals in the Sangdong Tungsten Mine Tailings

양재의,김휘중,전상호,Yang, Jae-E.,Kim, Hee-Joung,Jun, Sang-Ho Korean Society of Soil Science and Fertilizer 2001 한국토양비료학회지 Vol.34 No.1

Enormous volumes of mining wastes from the abandoned and closed mines are disposed without a proper treatment in the upper Okdong River basin at Southeastern part of Kangwon Province. Erosion of these wastes contaminates soil, surface water, and sediments with heavy metals. Objectives of this research were to fractionate heavy metals in the mine tailing stored in the Sangdong Tungsten tailing dams and to assess the potential pollution index of each metal fraction. Tailing samples were collected from tailing dams at different depth and analyzed for physical and chemical properties. pH of tailings ranged from 7.3 to 7.9. Contents of total N and organic matter were in the ranges of 3.2~5.5%, and 1.3~9.1%, respectively. Heavy metals in the tailings were higher in the newly constructed tailing dam than those in the old dam. Total concentrations of metals in the tailings were in the orders of Zn > Cu > Pb > Ni > Cd, exceeded the corrective action level of the Soil Environment Conservation Law and higher than the natural abundance levels reported from uncontaminated soils. Relative distribution of heavy metal fractions was residual > organic > reducible > carbonate > adsorbed, reversing the degree of metal bioavailability. Mobile fractions of metals were relatively small compared to the total concentrations. Distribution of metals in the tailing dam profiles was metal specific. Concentrations of Cu at the surface of tailing dams were higher than those at the bottom. Pollution index (PI) values of each fraction of metals were ranged from 4.27 to 8.51 based on total concentrations. PI values of mobile fractions were lower than those of immobile fractions. Results on metal fractions and PI values of the tailing samples indicate that tailing samples were contaminated with heavy metals and had potential to cause a detrimental effects on soil and water environment in the lower part of the stream. A prompt countermeasure to prevent surface of tailings in the dams from water and wind erosions is urgently needed.

Treatment of abandoned coal mine discharged waters using lime wastes

양재의,Hee Joung Kim,옥용식,이재영,박준홍 한국지질과학협의회 2007 Geosciences Journal Vol.11 No.2

We evaluated the feasibility using waste lime for reclaiming abandoned coal mines. For this evaluation, lime wastes were reused in neutralizing coal wastes in a field experiment. In runoff and leachate, pH and heavy metals were monitored for approximately 4 months to evaluate ecotoxicity at the remediation site. When the amount of added lime cake was equivalent to the 100% lime requirement for neutralization, stable neutralization was obtained during the entire experimental period. Because of pH neutralization, ecotoxic heavy metals were efficiently contained in the coal waste pile. When smaller amounts of lime cake were applied, although heavy metal releases did not increase, the pH in runoff/leachate fluctuated depending on the amount of precipitation and the history of field treatment. This suggests that field specific environmental factors have to be considered in determining the amount of lime cake required for stable neutralization. These findings from the field study demostrated the potential use of lime waste from soda ash production for reclaming abandoned coal mines.

AEG·KANIS 4200KW기 도입에 대하여

양재의 대한전기학회 1965 전기의 세계 Vol.14 No.1

본기는 1962년 5월 15일자로 설립된 흥한화학섬유주식회사 도농공장에서 일산 15도의 Viscose 인견사를 생산할 목적으로 최대 소요 증기량 매시 57도 및 전력 10,000kw 중 그 일부인 약 4,000kw를 자가발전에 의하여 각 공장의 경제적 운영을 도모키 위하여 서독의 AEG-KANIS회사에서 발주.제작한 것인데 금년 2월 중도에 입하가 개시되어 동년 말까지 설치후 시운전을 완료할 예정이었으나 경제적 기타 사정에 의하여 공사의 지연을 불면하는바 그 시설의 규격, 성능 등에 관한 전반적 개요를 소개하고자 한다.

기력발전소건설급 운영요강

양재의 대한전기학회 1953 전기의 세계 Vol.5 No.-

AEG.KANIS 4200KW기 도입에 대하여

양재의 대한전기학회 1965 전기의 세계 Vol.14 No.5

본기는 1962년 5월 15일자로 설립된 흥한화학섬유주식회사 도농공장에서 일산 15도의 Viscose 인견사를 생산할 목적으로 최대 소요 증기량 매시 57도 및 전력 10,000kw 중 그 일부인 약 4,000kw를 자가발전에 의하여 각 공장의 경제적 운영을 도모키 위하여 서독의 AEG-KANIS회사에서 발주.제작한 것인데 금년 2월 중도에 입하가 개시되어 동년 말까지 설치후 시운전을 완료할 예정이었으나 경제적 기타 사정에 의하여 공사의 지연을 불면하는바 그 시설의 규격, 성능 등에 관한 전반적 개요를 소개하고자 한다.

포스터발표논문초록 / 환경 농약 분야 ( EP : Environment & Pesticides ) : EP78 - 산지에서 영농관리방법이 토양의 특성 및 수량에 미치는 영향

양재의,최중대,한원석,김동국,김정제 한국토양비료학회 1998 한국토양비료학회 학술발표회 초록집 Vol.- No.-