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Uptake and biosorption potential of Pistia stratiotes for Cr6+

机译：开心果层对Cr6 +的吸收和生物吸附潜力

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Uptake and biosorption potential of Pistia stratiotes for Cr6+ was examined. The study was conducted in two phases: in the first phase, the effect of different Cr6+ concentrations on plant weight, leaf number and root length was determined along with plants uptake potential. Higher concentration of Cr6+ (> 8 ppm) had inhibitory effects on increase in plant weight due to impairment of the metabolic machinery. Leaf number and root length showed no increase when exposed to a Cr6+ concentration of ~ 10 ppm. When grown in solutions containing 2, or 4 ppm Cr6+ concentrations, P. stratiotes removed 100% of Cr6+. However at increasing concentrations of 6 and 8 ppm, only 50% reduction in respective solutions was recorded. In a second phase biosorption capacity of dead P. stratiotes was determined. The optimal pH range for maximum Cr6+ biosorption lied between 1-2. Maximum biosorption capacity of dead biomass was recorded at 200 ppm of the initial Cr6+ concentration. The volume and pH of a Cr6+ solution passing through the columns were critically important affecting the biosorption capacity of P. stratiotes. These findings are important for cost-effective and environmental friendly removal of Cr6+ from tannery effluents which are posing serious risk to human and environmental health in tannery hubs of Pakistan.
机译：研究了水浮萍对Cr6 +的吸收和生物吸附潜力。该研究分两个阶段进行：在第一阶段，确定了不同浓度的Cr6 +对植物重量，叶片数和根长以及植物吸收潜力的影响。由于代谢机制的损害，较高浓度的Cr6 +（> 8 ppm）对植物重量的增加具有抑制作用。当暴露于约10 ppm的Cr6 +浓度时，叶数和根长没有增加。当在浓度为2 ppm或4 ppm的Cr6 +的溶液中生长时，P。条纹去除100％的Cr6 +。但是，当浓度增加为6和8 ppm时，记录到相应溶液仅减少了50％。在第二阶段，测定了死去的条纹藻的生物吸附能力。最大Cr6 +生物吸附的最佳pH范围介于1-2之间。死生物质的最大生物吸附能力记录为初始Cr6 +浓度的200 ppm。穿过色谱柱的Cr6 +溶液的体积和pH值对影响条纹藻的生物吸附能力至关重要。这些发现对于从制革厂废水中经济高效且环境友好地去除Cr6 +具有重要意义，这些废水对巴基斯坦制革厂枢纽的人类和环境健康构成严重威胁。

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