Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
Sci Total Environ. 2016 Jan 1;539:175-184. doi: 10.1016/j.scitotenv.2015.08.120. Epub 2015 Sep 8.
Concentration of uranium was determined in aquatic plants and substrate (sediment or water) of fresh water ecosystem on and around uranium mill tailings pond at Jaduguda, India. Aquatic plant/substrate concentration ratios (CRs) of uranium were estimated for different sites on and around the uranium mill tailings disposal area. These sites include upstream and downstream side of surface water sources carrying the treated tailings effluent, a small pond inside tailings disposal area and residual water of this area. Three types of plant groups were investigated namely algae (filamentous and non-filamentous), other free floating & water submerged and sediment rooted plants. Wide variability in concentration ratio was observed for different groups of plants studied. The filamentous algae uranium concentration was significantly correlated with that of water (r=0.86, p<0.003). For sediment rooted plants significant correlation was found between uranium concentration in plant and the substrate (r=0.88, p<0.001). Both for other free floating species and sediment rooted plants, uranium concentration was significantly correlated with Mn, Fe, and Ni concentration of plants (p<0.01). Filamentous algae, Jussiaea and Pistia owing to their high bioproductivity, biomass, uranium accumulation and concentration ratio can be useful for prospecting phytoremediation of stream carrying treated or untreated uranium mill tailings effluent.
在印度贾杜达铀矿的铀矿尾渣池及其周边的淡水生态系统中的水生植物和基质（沉积物或水）中，测定了铀的浓度。对铀矿尾渣处理区及其周边不同地点的水生植物/基质铀浓度比（CR）进行了估算。这些地点包括上游和下游的地表水来源，这些地表水携带经过处理的尾矿废水，一个在尾矿处理区内部的小池塘，以及该地区的残余水。调查了三种类型的植物群体，即藻类（丝状和非丝状）、其他自由漂浮和水淹没以及底生根植物。研究表明，不同植物群体的浓度比存在广泛的变化。丝状藻类的铀浓度与水的铀浓度呈显著相关（r=0.86，p<0.003）。对于底生根植物，植物中的铀浓度与基质中的铀浓度呈显著相关（r=0.88，p<0.001）。对于其他自由漂浮物种和底生根植物，铀浓度与植物中的 Mn、Fe 和 Ni 浓度呈显著相关（p<0.01）。丝状藻类、Jussiaea 和 Pistia 由于其高生物生产力、生物量、铀积累和浓度比，可以用于探测处理或未处理的铀矿尾渣废水的溪流的植物修复。
