This study investigates the characteristics of metallic and ionic elements concentration, concentration according to transport path, and factor analysis in PM10 at Guducsan in Busan in the springtime of 2015. PM10 concentration in Guducsan and Gwaebeopdong were 59.5± 9.04 ㎍/㎥ and 87.5±20.2 ㎍/㎥, respectively. Contribution rate of water-soluble ions and secondary ion in PM10 concentration in Guducsan were 37.0% and 27.8% respectively. [NO3 -/SO4 2-] ratio and contribution rate of sea salt of PM10 in Guducsan and Gwaebeopdong were 0.91 and 1.12, 7.0% and 5.3%, respectively. The results of the backward trajectory analysis indicates that PM10 concentration, total inorganic water-soluble ions and total secondary ions were high when the air parcels moved from Sandong region in China than non-Sandong and northen China to Busan area. The results of the factor analysis at Guducsan indicates that factor 1 was anthropogenic source effects such as automobile emissions and industrial combustion processes, factor 2 was marine sources such as sea salts from sea, and factor 3 was soil component sources.

Background: Turmeric (Curcuma longa L.) that is used as a food material has antioxidant, anticancer and anti-inflammatory properties. Recently the demand for functional foods and drugs has increased. The present study was carried out to determined of contents of residual sulfur dioxide, heavy metals, ash, acid insoluble ash and curcuminoids in turmeric from the Seoul Yak-ryeong market. Methods and Results: A total of 31 samples were obtained. Residual sulfur dioxide was not detected in any samples. Heavy metals (arsenic, cadmium, lead and mercury) were analyzed by ICP-MS (Inductively Coupled Plasma Mass Spectrometer) and a mercury analyzer and were detected in the ranges of 0.00 - 0.28, 0.00 - 0.07, 0.00 - 0.29 and 0.002 - 0.027㎎/g respectively. No significant difference were observed between the average heavy metal contents of domestic and imported tumeric. However, average content of ash in domestic samples (7.8%) were significantly higher than that in imported samples (6.1%), whereas that of curcuminoids was significantly higher in imported samples (47.6㎎/g) than in domestic samples (11.2㎎/g). The average content of acid insoluble ash was not significantly different between two sample types (0.9% in each). Conclusions: There are no specific standards for turmeric used as food materials. Therefore, this study can be provided as basic data for the establishment of quality standards for turmeric.

This study is the adhesion strength of the sprayed metal in accordance with a proportion ratio of the Zn-Al. Results showed the most excellent adhesion strength for metal spraying Al100 For the metal spraying Zn100, ZnAl85, ZnAl95 exhibited a similar level of adhesion strength results.

Recently, Advanced water treatment facilities with Ozone are being introduced domestically. However, waterproofing/corrosion prevention construction method of concrete structure for existing advanced water treatment makes waterproofing/corrosion prevention materials and concrete deteriorated because of strong oxidation of ozone. Therefore, in this study, As a one of studies for improving durability of advanced water treatment plant applied by metal spray system, electrochemical corrosion protection of metal spraying film according to surface treatment in pH 5 acid solution which is similar to pH concentration in real ozone treatment was evaluated..

In this paper, the heavy metal leaching of mortar substituted the crushed waste glass as fine aggregate are evaluated. From the results, when the heavy weight waste glass substitution ratio increase, leching quantities of heavy metal is increased. Therefore, it is needed that the characteristics of heavy metal leching according to waste glass substitution ratio in mortar specimens.

Development of appropriate construction technology at frozen soil environments for developing resources is essential. However, cathodic protection technology using monitoring at frozen soil environments is lack. In this study, we want to build a real-time monitoring system at frozen soil environments through corrosion monitoring using type of gavanic metal

In this study, the leaching characteristics of magnesium from mine residue by acid leaching method was studied. First, It was confirmed the effect of the particle size. The particle size was selected 80 mesh in consideration of the leaching amount and recycling rate of Mg. And after, It was compared to the leaching characteristics of magnesium by H2SO4, HCl and HNO3. Among them, leaching efficiency of H2SO4 was best. After the experiments were conducted with H2SO4. The effect of various parameters such as acid concentration, reaction temperature, and liquid/solid ratio on the leaching process were investigated. It was determined that the leaching amount of magnesium increased with reaction acid concentration, temperature, and liquid/solid ratio, and decreasing particle size. Maximum leaching amount of magnesium was obtained at the condition of particle size blow 80 mesh, temperature 80oC, 6 M H2SO4, 10/1 liquid/solid ratio, 6 h of reaction time and 180 rpm.