Dil Ebrahim Alipanahpour, Ghaedi Mehrorang, Ghezelbash Gholam Reza, Asfaram Arash
Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
Ecotoxicol Environ Saf. 2017 May;139:158-164. doi: 10.1016/j.ecoenv.2017.01.030.
Present study is based on application of live yeast Yarrowia lipolytica 70562 as new biosorbent was investigated for the simultaneous biosorption of Crystal Violet (CV) and Brilliant Green (BG) from wastewater. The effect of operating parameters such as initial dye concentrations (6-14mgL), solution pH (4.0-8.0) and contact time (4-20h) was investigated by response surface methodology (RSM) for modeling and optimization of biosorption process and accordingly the best operational conditions was set as: initial CV and BG concentration of 8.0, and 10mgL, pH of 7.0 and contact time of 16h. Above specified conditions lead to achievement of maximum biosorption of 98.823% and 99.927% for CV and BG dyes, respectively. The experimental equilibrium data well explained according to Langmuir isotherm model with maximum biosorption capacity of 65.359 and 56.497mgg for BG and CV, respectively. The second order and intraparticle diffusion models as cooperative mechanism has high efficiency and performance for interpretation of real data.
本研究基于将解脂耶氏酵母70562作为新型生物吸附剂应用于从废水中同时生物吸附结晶紫（CV）和亮绿（BG）展开。通过响应面法（RSM）研究了初始染料浓度（6 - 14mg/L）、溶液pH值（4.0 - 8.0）和接触时间（4 - 20h）等操作参数对生物吸附过程建模和优化的影响，据此将最佳操作条件设定为：CV和BG的初始浓度分别为8.0和10mg/L，pH值为7.0，接触时间为16h。上述特定条件分别使CV和BG染料的生物吸附率达到最大值98.823%和99.927%。实验平衡数据根据朗缪尔等温线模型得到了很好的解释，BG和CV的最大生物吸附容量分别为65.359和56.497mg/g。二阶和颗粒内扩散模型作为协同机制对实际数据的解释具有较高的效率和性能。
