The Effects of Inland Pollution Sources around the Port of Jeokyang and Jangpo after Rainfall Events on Bacteriological Water Quality in the Changseon Area, Korea

Abstract

The influences of inland pollution sources nearJeokyang and Jangpoports following rainfall events on the bacteriological water quality and safety of commercial shellfish were investigated in the Changseon area, Korea. Stream flow rates exhibited 1.9-to 5.7-fold increases after rainfall events and then fell to 68~81% of that level after 24 h. The calculated impact area of inland pollution sources was 0.47 km 2 in the Jeokyangport area and 0.27 km 2 in the Jangpoport area at 24 h following 11 mm of rainfall. When the flow rate of inland pollution increased, the level of male-specific bacteriophage (MSB) decreased, and no MSB could be detected in seawater samples, whereas 30 PFU/100 g was detected in shellfish samples. Fecal coliform levels in seawater and shellfish samples did not exceed their respective tolerance levels (4.5 MPN/100 mL) and 130 MPN/100 g, respectively and thus complied with the standard for approved shellfish growing area. The sanitary conditions of areas adjacent to Jeokyang and Jangpoports under conditions of rainfall below 29 mm met the criteria for approved growing area under the United States National Shellfish Sanitation Program and the EC Regulations.

Bioaccumulation of Heavy Metals in the Mussel Mytilus galloprovincialis in the Changseon area, Korea, and Assessment of Potential Risk to Human Health

“…About 1.0 g powdered sample was placed in a 60 mL digestion vessel (Savillex, Eden Prairie, MN, USA), after which 20 mL nitric acid was added. The vessel was covered and left overnight at ince, has been the designated shellfish-cultivation area for export since 2009 because it is an important mussel-cultivation area in Korea (Ha et al, 2013). The products are consumed domestically or exported mainly to the EU (Mok et al, 2013).…”