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Chemical Speciations of Elements in the Fe-Mn Crusts by Sequential Extraction
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  • Journal title : Ocean and Polar Research
  • Volume 26, Issue 2,  2004, pp.231-243
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2004.26.2.231
 Title & Authors
Chemical Speciations of Elements in the Fe-Mn Crusts by Sequential Extraction
Kim, Jong-Uk; Moon, Jai-Woon; Chi, Sang-Bum; Ko, Young-Tak; Lee, Hyun-Bok;
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 Abstract
Sequential extraction was carried out on twenty two subsamples of three ferromanganese crusts from three seamounts (Lemkein, Lomilik, and Litakpooki) near the Marshall Islands in the western Pacific. The extraction was designed to fractionate Fe-Mn crust forming elements into low defined groups: (1) exchangeable and carbornate, (2) Mn-oxide, (3) Fe-oxyhyd.oxide, and (4) residual fraction. X-ray diffraction result shows that target material were well removed by each extraction step except for CFA in phosphatized crusts generation. According to chemical analysis of each leachate, most of elements in the Fe-Mn crusts are bound with two major phases. Mn, Ba, Co, Ni, Zn, (Fe, Sr, Cu, and V) are strongly bounded with Mn-oxide phase, whereas Fe, Ti, Zr, Mo, Pb, Al, Cu,(V, P, and Zn) show chemical affinity with Fe-oxyhydroxide phase. This result indicates that significant amount of Al, Ti, and Zr can not be explained by detrital origin. Ca, Mg, K, and Sr mainly occur as exchangeable elements and/or carbonate phase. Outermost layer 1 and inner layer 2 which are both young crusts generations are similar in chemical speciations of elements. However, some of Fe-oxyhydroxide bounded elements (Pb, Y, Mo, Ba, Al, and V) in phosphatized innermost layer 3 are released during phosphatization and incorporated into phosphate (Pb, Y, Mo, and Ba) or Mn-oxide phase (Al and V). Our sequential extraction results reveal that chemical speciations of elements in the hydrogenetic crusts are more or less different from interelemental relationship calculated by statistical method based on bulk chemistry.
 Keywords
sequential extraction;Fe-Mn crusts;phosphatization;hydrogenetic elements;
 Language
Korean
 Cited by
1.
직교배열표 실험계획법에 의한 심해저 점착성 연약지반용 무한궤도차량의 선회성능에 대한 실험 연구,최종수;홍섭;김형우;

한국해양공학회지, 2006. vol.20. 4, pp.37-42
2.
한국이 탐사 중인 해저광물자원의 희유금속 함량과 의미,박상준;문재운;이경용;지상범;

자원환경지질, 2010. vol.43. 5, pp.455-466
3.
부이 특성에 따른 궤도 차량 동적 거동,김형우;민천홍;이창호;홍섭;배대성;오재원;

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