In the present work, the potential adsorptive behavior of algal cells (Chlorella pyrenoidosa) for decolorization of dye industry wastewater has been studied in the form of free algal cells (FAC) and immobilized algal cells (IAC). Effect of concentrations of real dye industry wastewater (50 and 100%), temperatures (30, 40, 50, and 60 °C) at controlled pH, and equal amount of algal cells (2 g mL⁻¹) have been studied. Adsorption isotherms (Langmuir and Freundlich) with kinetic and thermodynamic equations were applied to experimental data; 52–87% of decolorization was noticed with both algal cells and concentrations at room temperature. But, maximum (98%) decolorization was obtained at 50 °C with immobilized form of algal cell. Results were analyzed by Langmuir and Freundlich equations at different temperatures and were found to be more significant (R² = 0.99) with Langmuir isotherm for adsorption with IAC. The pseudo-second-order kinetic model was also found significant (R² = 0.90) to explain the kinetics of adsorption more efficiently. Endothermic nature reaction has been in adsorption process and thermodynamic parameters (ΔG, ΔH, and ΔS) also have been calculated. It has been concluded from the results that adsorption of the dye in wastewater that follows a pseudo-second-order kinetics provides a low-cost approach solution for treatment.

在目前的工作中，以游离藻细胞（FAC）和固定藻细胞（IAC）的形式研究了藻类细胞（Chlorella pyrenoidosa）对染料工业废水脱色的潜在吸附行为。实际染料行业废水的浓度（50％和100％），温度（30、40、50和60°C）在受控pH下以及等量藻类细胞（2 g mL ^{-1）的影响}）已被研究。具有动力学和热力学方程的吸附等温线（Langmuir和Freundlich）被用于实验数据。藻类细胞及其在室温下的浓度均可观察到52–87％的脱色。但是，在固定化藻类细胞的情况下，在50°C下可获得最大（98％）脱色。通过在不同温度下的Langmuir和Freundlich方程对结果进行了分析，结果发现Langmuir等温线对IAC的吸附更有意义（R ² = 0.99）。还发现伪二级动力学模型很重要（R ²= 0.90）以更有效地解释吸附动力学。吸热性质反应一直在吸附过程中，并且还计算出了热力学参数（ΔG，ΔH和ΔS）。从结果可以得出结论，染料在废水中的吸附遵循伪二级动力学，为处理提供了一种低成本的解决方案。