Industrial wastewater needs to be treated because of the heavy metals presence and their effects on the environment. The aim of this study was to remove heavy metals ions such as copper and zinc from aqueous solutions by using Escherichia coli (E. coli) biofilm which was placed on zeolite. The paper was experimental. Synthetic and real samples were evaluated in laboratory scale. To evaluate the removal efficiency, the effective parameters such as pH, copper and zinc concentrations, and contact time were examined. Optimal conditions were obtained with experiments on the synthetic samples. To study the adsorption isotherms, Langmuir and Freundlich isotherm models were investigated. The copper and zinc cations maximum removal efficiency at 40 mg/L within 10 days was obtained as 54.61% and 57.35%, respectively. By using Langmuir isotherm, the experimental data were fitted with correlation coefficients of 0.98 and 0.95 for copper(II) and zinc(II), respectively. The results showed that the hybrid of zeolite and bacterial biofilm system has the best efficiency for removing the metal copper and zinc cations.

中文翻译：

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通过置于水溶液中的沸石上的大肠杆菌生物膜去除重金属（案例研究：Kerman Bahonar铜络合物的废水）

由于重金属的存在及其对环境的影响，需要对工业废水进行处理。这项研究的目的是通过使用大肠杆菌（E. coli）去除水溶液中的重金属离子，例如铜和锌）置于沸石上的生物膜。该论文是实验性的。合成和真实样品均在实验室规模内进行评估。为了评估去除效率，检查了诸如pH，铜和锌浓度以及接触时间等有效参数。通过对合成样品进行实验获得了最佳条件。为了研究吸附等温线，研究了Langmuir和Freundlich等温线模型。10天之内以40 mg / L去除铜和锌阳离子的最大去除效率分别为54.61％和57.35％。通过使用Langmuir等温线，实验数据的铜（II）和锌（II）的相关系数分别为0.98和0.95。