A simple green method was developed for rapid synthesis of silver and gold nanoparticles (AgNPs and AuNPs) has been reported using Lonicera japonica flower extract as a reducing and a capping agent. AgNPs and AuNPs were carried out at 70 o C. The successful formation of AgNPs and AuNPs have been confirmed by UV-Vis spectro photometer, fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy dispersive X-ray Analysis (EDAX), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). To our knowledge, this is the first report where Lonicera japonica flower was found to be a suitable plant source for the green synthesis of AgNPs and AuNPs.
The coastal environment is affected by Cu and Zn contamination through diverse routes, including antifouling agents, industrial wastewater, and domestic activities. In this study, Crassostrea gigas and Littorina brevicula were used to examine the distributions of Cu and Zn, which are related to the increase in the use of new antifouling agents that have been used for ships since the TBT ban in 2003. The average Cu and Zn concentrations in the samples were 231.8 μg/g and 492.6 μg/g, respectively. Both the Cu and Zn concentrations were highest in the shipyard samples, followed by the harbor sample for Cu and the industrial area sample for Zn. The results indicated that the Cu concentration was affected by the antifouling agents, and the Zn concentration was affected by both the antifouling agents and industrial wastewater. The areas that need intensive control to address the Cu and Zn contamination in major Korean coasts were identified. 요 약 해양 환경에서 구리와 아연의 오염은 방오제, 산업폐수, 가정하수와 같은 다양한 경로를 통해서 유입이 되고 있다. 이 중 2003년 유기주석화합물사용 금지 이후 선박에 사용되는 신방오제의 사용량증가와 관련된 중금속인 구리 와 아연의 오염분포를 Crassostrea gigas와 Littorina brevicula을 통하여 확인하여 보았다. 이 결과 이들 샘플 중에 구 리와 아연의 평균농도는 각각 231.8 μg/g, 492.6 μg/g으로 나타났다. 구리와 아연 두 물질 모두 수리조선소에서 채 취한 샘플에서 가장 높은 농도로 측정되었으며, 다음으로 구리의 경우 항구에서 채취한 샘플에서 구리의 경우 산업단 지샘플에서 고농도로 측정되었다. 이 결과를 참고 할 때 구리는 방오제에 기인된 영향을 받고 있는 것으로 아연은 방 오제 이외에 산업단지폐수에 영향을 받고 있는 것으로 판단되었다. 본 연구를 통하여 한국 내 주요 연안에 대한 구리 와 아연에 의한 오염 개선을 위하여 집중적으로 관리해야 되는 지역을 파악할 수 있었다.
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