气候变化领域集成服务门户(CCPortal): Anthropogenic spherules in Zuari estuary; south west coast of India

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DOI	10.1016/j.marpolbul.2019.03.058
	Anthropogenic spherules in Zuari estuary; south west coast of India
	Shetye S.S.; Rudraswami N.G.; Nandakumar K.; Manjrekar S.
发表日期	2019
ISSN	0025326X
起始页码	1
结束页码	5
卷号	143
英文摘要	In this study we report silica rich anthropogenic spherules from the marine environment. We found spherical, dumbbell, teardrop and fused spherules in Zuari estuary (near the Dona paula jetty), south west coast of India. The spherules were composed of SiO2 (69.8%), Na2O (13.2%), CaO (8.8%), MgO (3.8%), and traces of Al2O3, and FeO. Their high Na and Ca contents rules out the possibility of being an impact spherule or microtektite, or anthropogenic spherules coming from fly ash. Their elemental composition suggests that these are glass micro beads that have many applications including production of road and pavement marking materials, such as traffic paints. Considering that the glass micro beads are known to have high concentrations of Pb, As, and Sb that can leach into the marine environment, this study also raises questions regarding the impact of such spherules on marine biota, and highlights the need for further detailed study. © 2019 Elsevier Ltd
英文关键词	Anthropogenic; Microtektites; Morphology; Spherules; Zuari
语种	英语
scopus关键词	Alumina; Aluminum oxide; Fly ash; Glass; Iron oxides; Magnesia; Morphology; Road and street markings; Silica; Anthropogenic; Elemental compositions; Impact spherules; Marine environment; Microtektites; Pavement markings; Spherules; Zuari; Sodium compounds; aluminum oxide; antimony; arsenic; calcium; calcium oxide; iron oxide; lead; magnesium oxide; silicon dioxide; sodium; calcium; silicon dioxide; sodium; biota; concentration (composition); fly ash; human activity; marine ecosystem; marine pollution; morphology; silica; spherule; anthropogenic spherule; Article; chemical composition; concentration (parameter); environmental impact; estuary; fly ash; geographic and geological phenomena; India; chemistry; estuary; Indian Ocean; water pollutant; Goa; India; Zuari Estuary; Calcium; Estuaries; India; Indian Ocean; Silicon Dioxide; Sodium; Water Pollutants, Chemical
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149910
作者单位	CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
推荐引用方式 GB/T 7714	Shetye S.S.,Rudraswami N.G.,Nandakumar K.,et al. Anthropogenic spherules in Zuari estuary; south west coast of India[J],2019,143.
APA	Shetye S.S.,Rudraswami N.G.,Nandakumar K.,&Manjrekar S..(2019).Anthropogenic spherules in Zuari estuary; south west coast of India.Marine Pollution Bulletin,143.
MLA	Shetye S.S.,et al."Anthropogenic spherules in Zuari estuary; south west coast of India".Marine Pollution Bulletin 143(2019).