Monitoring of Hazardous Chemicals for Effluents of STPs and WWTP in the Nakdong River Basin

Abstract

This study was investigated twenty two hazardous chemicals compounds for effluents of nine sewage treatment plants (STPs) and one waste water treatment plant (WWTP) in the Nakdong Ri-ver Basin. They are eleven phthalates(DMP, DEP, DIBP, DBP, BEEP, DNPP, DHP, DCP, DEHP, DNOP, Dinonyl phthalate, seven aliphatic hydrocarbons(n-Tridecane, n-Tetradecane, n-Pentadecan-e, n-Hexadecane, n-Heptadecane, n-Octadecane, n-Nonadecane, Isoquinoline, 2-Chloropyridine, 2-N-itrophenol, and Benzophenone. The twenty two compounds were analyzed by gas chromatograp-hy mass spectrometry (GC/MS) with liquid-liquid extraction (LLE). Twenteen of twenty two subs-tances were detected. They were DMP, DEP, DIBP, DBP, DEHP, n-Tetradecane, n-Pentadecane, n-Heptadecane, n-Octadecane, n-Nonadecane, Isoquinoline and Benzophenone. Among these, DEHP, DEP and Benzophenone were most frequently observed. They were obtained as ND~36.881 ㎍/L, ND~0.950 ㎍/L, ND~2.019 ㎍/L, respectively. When the substances were calculated the average concentration at 10 points, the maximum average detection concentration was investigated at the Dalseocheon STP.

Anthropogenic Occurrence of Phthalate Esters in Beach Seawater in the Southeast Coast Region, South Korea

“…Additionally, there were higher proportions of DEP than DMP in Spring at all sites, and the ratio varied from 1.4 to 4.4 times while the ratio of DEP to DMP ranged from 0.8 to 1.2 times in Summer. These results are consistent with the water quality of the Nakdong River [17]. As mentioned previously, DD is located at an estuary of the Nakdong River, so the seawater quality at DD can be affected by the water quality of the Nakdong River.…”

“…As mentioned previously, DD is located at an estuary of the Nakdong River, so the seawater quality at DD can be affected by the water quality of the Nakdong River. DEP and DEHP were the most frequently detected PEs in the effluent of a wastewater treatment plant (WWTP) in the Nakdong River Basin [17]. It was also reported that the DEHP concentration range was wide and that the highest concentration was 12.293 µg/L due to the characteristic of the industrial complex occupying the Nakdong River, whereas the DMP detection rate was the lowest (47.4%) and the concentration was 0.954 µg/L [17].…”

“…The high PE concentrations in the areas near the river-sea border (JH and DD) with a range of salinities may have resulted from the close integration of soluble soil and humus derived from rivers containing macromolecular material, which resulted in increased apparent solubility and reduced apparent adsorption of macromolecular material [17]. The concentration of emitted PEs is affected by several natural phenomena such as seawater properties, weather, and other environmental factors [7].…”