The processed protein-rich scales of Labeo bata fish have been characterized as cycloid pattern from the scanning electron and atomic force microscopic images. The scales when used for the bromophenol blue (BPB) adsorption from aqueous phases show the good BPB removal performance at pH 4.8 (± 0.1). The kinetic data acquired at that pH fits well both with the pseudo-second order and the Weber-Morris kinetic equations. Arrhenius activation energy (E_a = 4.20 kJ. mol^-1) as well as temperature dependent kinetic parameter (A = 75.56 g. mg^-1. min^-1) which are estimated indicate the facile BPB adsorption. The data of adsorption equilibriums describe the Freundlich model very well. Thermodynamics shows that the BPB adsorption by the fish scale is spontaneous (∆G⁰ = negative, ∆H⁰ = -21.49 kJ. mol^-1 and ∆S⁰ = + 27.75 J.mol^-1.K^-1). The BPB adsorption by the tested fish scale has taken place with electrostatic mechanism.

中文翻译：

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水溶液中溴酚蓝在生物废料Labeo bata鱼鳞上的吸附行为

根据扫描电子和原子力显微镜图像，已加工的Labeo bata鱼富含蛋白质的鳞片已表征为摆线样式。当用于从水相吸附溴酚蓝（BPB）时，水垢显示出在p H 4.8（±0.1）时良好的BPB去除性能。在那个P H处获得的动力学数据与拟二阶动力学方程和Weber-Morris动力学方程都非常吻合。阿伦尼乌斯活化能（E_一= 4.20千焦。摩尔^-1），以及温度依赖性动力学参数（A =75.56克。毫克^-1。分钟^-1）的估算值表明了BPB的易吸附性。吸附平衡数据很好地描述了Freundlich模型。热力学表明鱼鳞对BPB的吸附是自发的（∆G ⁰ =负，∆H ⁰ = -21.49 kJ.mol ^-1和∆S ⁰ = + 27.75 J.mol ^-1 .K ^-1）。被测鱼鳞对BPB的吸附是通过静电机制发生的。