No abstract

The aims of this study were the determination of (i) tetracycline (TC) and the degradation products removal efficiency of Elazı g Municipal Wastewater Treatment Plant (ii) the removal of TC and the degradation products in a pilot scale constructed wetland reactor planted with Lemna gibba L., which takes the effluent of the treatment plant (iii) the comparison of the removal of TC and the degradation products in the treatment plant and pilot scale reactor and (iv) the contribution of the planted rector to the treatment plant in terms of removal of TC and the degradation products. For these aims, composite samples were taken from both the influent and effluent of the treatment plant and the pilot scale reactor and then TC and degradation products analyses were done by UFLC/MS-MS. TC, 4-epianhydrotetacycline (EATC) and anhydrotetracycline (ATC) removal efficiencies of the treatment plant were determined as 79.65, 64.42, and 80.19%, respectively. 4-epitetracycline (ETC) removal efficiency was not seen. TC, ETC, EATC, and ATC removal efficiencies in the planted reactor were obtained as 55.42, 89.85, 39.31 and 63.42%, respectively. The data obtained from the results of the analyses were also evaluated statistically. As a result, it was seen that Lemna gibba L. was efficient to remove TC and the degradation products and improved the treatment plant TC and the degradation products removal efficiency.

No abstract

In this study, the efficiency of Lemna gibba L. on tetracycline (TC) removal from the solutions prepared at various initial TC concentrations (50, 100 and 300 µg/L) was investigated. The study was conducted in the reactors planted with Lemna gibba L. plants. Lemna gibba L. plants in the reactors were harvested at various hydraulic retention times. Then, the concentrations of TC were determined by using LC/‐MS‐MS. The maximum removal efficiencies for the TC50, TC100 and TC300 in the planted reactors were 99.8 ± 4.1; 99.9 ± 4.9 and 99 ± 4.9%, respectively. The harvesting times for Lemna gibba L. at TC50, TC100 and TC300 concentrations were determined to be 12, 8 and 12 hours, respectively. First‐, second‐ and pseudo‐first‐order kinetics are determined in the planted reactors (with Lemna gibba L.). According to the study results, second‐order kinetics were obtained at TC50, TC100, TC300 concentrations. As a result, the Lemna gibba L. plant can be used as an alternative treatment method to other advanced treatment methods and it can be done with a cheap method by adapting to existing treatment plants. Lemna gibba L. plants can be used to remove pollutants by applying them to polluted lakes and water bodies.

No abstract