Accumulation of dysprosium,samarium,terbium,lanthanum,neodymium and ytterbium by Arthrospira platensis and their effects on biomass biochemical composition  

作　　者：Inga Zinicovscaia Liliana Cepoi Ludmila Rudi Tatiana Chiriac Dmitrii Grozdov Sergey Pavlov Svetlana Djur 

机构地区：[1]Joint Institute for Nuclear Research,6 Joliot-Curie Str.,1419890,Dubna,Russia [2]Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering,30 Reactorului Str.MG-6,Bucharest,Magurele,Romania [3]Institute of Microbiology and Biotechnology,1 Academiei Str.,202&Chisinau,Moldova [4]State University,"Dimitrie Cantemir",3/2 Academiei Str.,2028,Chisinau,Moldova

出　　处：《Journal of Rare Earths》2021年第9期1133-1143,共11页稀土学报（英文版）

摘　　要：The growth of Arthrospira platensis and physiological changes in biomass under the effects of six rare earth elements Dy,Sm,Tb,La,Nd and Yb were evaluated.Elements were tested by three concentrations of 10,20 and 30 mg/L.According to neutron activation analysis data A.platensis’s accumulation capacity toward studied elements changes in the following order of La>Dy>Nd>Sm>Yb>Tb.The results show that Dy and La ions stimulate biomass growth and Yb ions inhibit it,while Sm,Tb and Nd ions do not affect biomass accumulation.The contents of proteins and chlorophyll a are not affected by the presence of rare earth elements in the cultivation medium.Studied elements affect to different extents carbohydrates,phycobilins,β-carotene,lipids and MDA contents in spirulina biomass.Changes in the antioxidant activity under applied metal loads reveal a moderate stress in exposed A.platensis.Cyanobacterium A.platensis can be successfully used for bioremediation of natural water contaminated with REEs as well as REEs recovery from low polluted industrial effluents.

关 键 词：Rare earth elements Arthrospira platensis Biochemical composition Antioxidant activity Neutron activation analysis 

分 类 号：TF845[冶金工程—有色金属冶金] X173[环境科学与工程—环境科学]