太平洋中部深海粘土中稀土的赋存状态及浸出研究
|
摘要
对太平洋中部深海粘土中的稀土元素赋存状态进行了表征,同时还研究了H2SO4溶液浸出稀土工艺,考察了H2SO4浓度、浸出时间、液固比、浸出温度等因素对深海粘土中Y浸出率的影响。研究结果表明:深海粘土主要由粘土、沸石、磷灰石等组成,稀土元素主要赋存于磷灰石中;Y的最佳浸出工艺条件为:H2SO4浓度为1 mol·L-1,浸出温度为40℃,浸出时间为60 min,液固比为4∶1,Y的浸出率为84.38%。
Occurrence state of rare earth in pelagic clay from the Central Pacific was characterized and process ofleaching rare earth by sulphuric acid was reported in this paper. Effects of process parameters on leaching ratio of rare earth element Y,including the sulphuric acid concentration,liquid-solid ratio,leaching temperature and time were investigated. The results showed that rare earth was main occurrence in apatite,and the pelagic clay was mainly composed of clay,zeolite and apatite. The best result of leaching ratio of rare earth element Y in this work was 84. 38%,and leaching of the pelagic clay with sulphuric acid solution( 1 mol·L- 1) and liquid-solid ratio was4 /1 at 40 ℃ for 1 h.
Occurrence state of rare earth in pelagic clay from the Central Pacific was characterized and process ofleaching rare earth by sulphuric acid was reported in this paper. Effects of process parameters on leaching ratio of rare earth element Y,including the sulphuric acid concentration,liquid-solid ratio,leaching temperature and time were investigated. The results showed that rare earth was main occurrence in apatite,and the pelagic clay was mainly composed of clay,zeolite and apatite. The best result of leaching ratio of rare earth element Y in this work was 84. 38%,and leaching of the pelagic clay with sulphuric acid solution( 1 mol·L- 1) and liquid-solid ratio was4 /1 at 40 ℃ for 1 h.
引文
[1]Toyoda K,Nakamura Y,Masuda A.Rare earth elements of Pacific pelagic sediments[J].Geochim.Cosmochim.Acta,1990,54:1093.
[2]张霄宇,邓涵,张富元,章伟艳,杜泳,江彬彬.西太平洋海山区深海软泥中稀土元素富集的地球化学特征[J].中国稀土学报,2013,31(6):729.Zhang X Y,Deng H,Zhang F Y,Zhang W Y,Du Y,Jiang B B.Enrichment and geochemical characteristics of rare earth elements in deep-sea mud from seamount area of western Pacific[J].Journal of the Chinese Society of Rare Earths,2013,31(6):729.
[3]Yasuhiro Kato,Koichiro Fujinaga,Kentaro Nakamura,Yutaro Takaya,Kenichi Kitamura,Junichiro Ohta,Ryuichi Toda,Takuya Nakashima,Hikaru Iwamori.Deepsea mud in the Pacific Ocean as a potential resource for rare-earth elements[J].Nat.Geosci.,2011,4:535.
[4]de Baar H J W,Bacon M P,Brewer P G,Bruland K W.Rare earth elements in the Pacific and Atlantic oceans[J].Geochim.Cosmochim.Acta,1985,49:1943.
[5]Yoshiaki Kon,Mihoko Hoshino,Kenzo Sanematsu,Sayaka Morita,Maiko Tsunematsu,Nobuyuki Okamoto,Nobuhiko Yano,Mikiya Tanaka,Tetsuichi Takagi.Geochemical characteristics of apatite in heavy REE-rich deep-sea mud from Minami-Torishima Area Southeastern Japan[J].Resour.Geol.,2014,64(1):47.
[6]Kazutaka Yasukawa,Hanjie Liu,Koichiro Fujinaga,Shiki Machida,Satoru Haraguchi,Teruaki Ishii,Kentaro Nakamura,Yasuhiro Kato.Geochemistry and mineralogy of REY-rich mud in the eastern Indian Ocean[J].J.Asian Earth Sci.,2014,93:25.
[2]张霄宇,邓涵,张富元,章伟艳,杜泳,江彬彬.西太平洋海山区深海软泥中稀土元素富集的地球化学特征[J].中国稀土学报,2013,31(6):729.Zhang X Y,Deng H,Zhang F Y,Zhang W Y,Du Y,Jiang B B.Enrichment and geochemical characteristics of rare earth elements in deep-sea mud from seamount area of western Pacific[J].Journal of the Chinese Society of Rare Earths,2013,31(6):729.
[3]Yasuhiro Kato,Koichiro Fujinaga,Kentaro Nakamura,Yutaro Takaya,Kenichi Kitamura,Junichiro Ohta,Ryuichi Toda,Takuya Nakashima,Hikaru Iwamori.Deepsea mud in the Pacific Ocean as a potential resource for rare-earth elements[J].Nat.Geosci.,2011,4:535.
[4]de Baar H J W,Bacon M P,Brewer P G,Bruland K W.Rare earth elements in the Pacific and Atlantic oceans[J].Geochim.Cosmochim.Acta,1985,49:1943.
[5]Yoshiaki Kon,Mihoko Hoshino,Kenzo Sanematsu,Sayaka Morita,Maiko Tsunematsu,Nobuyuki Okamoto,Nobuhiko Yano,Mikiya Tanaka,Tetsuichi Takagi.Geochemical characteristics of apatite in heavy REE-rich deep-sea mud from Minami-Torishima Area Southeastern Japan[J].Resour.Geol.,2014,64(1):47.
[6]Kazutaka Yasukawa,Hanjie Liu,Koichiro Fujinaga,Shiki Machida,Satoru Haraguchi,Teruaki Ishii,Kentaro Nakamura,Yasuhiro Kato.Geochemistry and mineralogy of REY-rich mud in the eastern Indian Ocean[J].J.Asian Earth Sci.,2014,93:25.