Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Ecotoxicity Assessment of Silver Nanomaterials with Different Physicochemical Characteristics in Diverse Aquatic Organisms

다양한 특성의 은나노물질이 수생생물에 미치는 독성영향평가

  • Hong, Nam-Hui (Gyeongnam Department of Environmental Toxicology Chemistry, Korea Institute of Toxicology) ;
  • Jung, Youn-Joo (Gyeongnam Department of Environmental Toxicology Chemistry, Korea Institute of Toxicology) ;
  • Park, June-Woo (Gyeongnam Department of Environmental Toxicology Chemistry, Korea Institute of Toxicology)
  • 홍남희 (안전성평가연구소 경남환경독성본부) ;
  • 정윤주 (안전성평가연구소 경남환경독성본부) ;
  • 박준우 (안전성평가연구소 경남환경독성본부)
  • Received : 2016.08.16
  • Accepted : 2016.09.07
  • Published : 2016.09.30
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Abstract

Silver nanomaterials have been intensively applied in consumer products of diverse industrial sectors because of their strong biocidal properties and reported to be hazardous to aquatic organisms once released in the environment. Nanomaterials including sliver, are known to be different in toxicity according to their physicochemical characteristics such as size, shape, length etc. However studies comparing toxicity among silver nanomaterials with different physicochemical characteristics are very limited. Here, toxicities of silver nanomaterials with different size (50, 100, 150 nm), length (10, $20{\mu}m$), shape (wire, sphere), and coating material (polyvinylpyrrolidone, citrate) using OECD test guidelines were evaluated in aquatic species (zebrafish, daphnia, algae) and compared. On a size property, the smaller of silver nanomaterials, the more toxic to tested organisms. Sphered type of silver nanomaterials was less toxic to organisms than wired type, and shorter nanowires were less toxic than longer ones. Meanwhile the toxic effects of materials coated on silver nanomaterials were slightly different in each tested species, but not statistically significant. To the best of our knowledge, it is first investigation to evaluate and compare ecotoxicity of silver nanomaterials having different physicochemical characteristics using same test species and test guidelines. This study can provide valuable information for human and environmental risk assessment of silver nanomaterials and guide material manufacturers to synthesize silver nanomaterials more safely to human and environment.

지금까지 개발된 나노물질 중 은나노물질은 일상 생활제품에 가장 많이 활용된 나노물질 중 하나로 알려져 있고 다양한 경로를 통해 환경에 유입되어 환경 및 인체에 부정적인 영향을 미칠 수 있는 것으로 알려져 있다. 화학물질과 달리 나노물질은 물리화학적 특성에 따라 동일 나노물질이더라도 그 유해성이 다르다고 알려져 있지만 기존 연구들은 다양한 특성을 동일 시험조건에서 평가하기 보다는 하나의 특성에 대해 독성을 보고하는 수준에 그치고 있다. 따라서 기존 연구들의 서로 다른 시험생물, 시험조건, 나노물질 특성 등을 고려할 때 나노물질의 물리화학적 특성에 따른 독성의 체계적인 비교평가가 어려운 한계가 존재한다. 본 연구는 은나노물질의 다양한 물리화학적 특징에 따라 수생생물에 미치는 독성영향을 평가하고자 한다. 대표적인 3종 (어류, 물벼룩, 조류)의 수생생물에 대한 은나노물질의 입자상 크기 (50, 100, 150 nm), 형태 (입자형, 선형), 코팅물질 종류 (PVP, citrate)에 따라 생태독성평가를 진행하였다. 연구결과, 나노 물질의 크기가 작을수록 그리고 입자상 형태보다 선형에서 독성이 비교적 높게 나타났다. 특히 선형 은나노의 경우, 길이에 비례하여 그리고 입자에 비해 비교적 높은 독성을 나타냈다. 반면, 은나노의 코팅물질 종류는 대상 수생생물에 따라 독성의 영향이 다르게 평가되었다. 본 연구는 은나노물질의 다양한 물리화학적 특성에 기인한 독성을 동일한 시험 조건, 시험생물에서 체계적으로 비교 평가하였다는 점에서 의의가 있으며 본 연구결과는 은나노물질의 환경 및 인체 위해성평가 자료로서 활용될 수 있을 뿐 아니라 보다 안전한 은나노물질 소재개발을 위한 과학적 자료로서 활용될 수 있을 것으로 사료된다.

Keywords

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