Vol.:(0123456789) 1 3 Chemistry Africa https://doi.org/10.1007/s42250-019-00094-7 ORIGINAL ARTICLE Textile Wastewater Treatment by Peroxydisulfate/Fe(II)/UV: Operating Cost Evaluation and Phytotoxicity Studies Nadia Bougdour 1  · Rachid Tiskatine 2  · Idriss Bakas 1  · Ali Assabbane 1 Received: 14 June 2019 / Accepted: 9 September 2019 © The Tunisian Chemical Society and Springer Nature Switzerland AG 2019 Abstract The discharges of the wastewater from the textile industry generate a substantial quantity of efuents which can cause vari- ous environmental problems, if disposed of without any prior treatment. Therefore, the treatment of these textile efuents is necessary. The present study aims to investigate the removal efciency of colors from wastewater containing mixed pri- mary direct dyes and real textile industry wastewater using PDS (Peroxydisulfate)/Fe(II)/UV process. A simulated mixture, based on an industrial recipe and containing Reactive Yellow 17 (RY17), Reactive Red 120 (RR120), and Reactive Blue 19 (RB19), was investigated. The obtained results showed that the mineralization rate is around 96.1% for RY17, 99.2% for RR120, 100% for RB19 and 80% for their mixed during 2 h of the treatment. The degradation of real textile wastewater was about 66% under similar conditions. The evaluations showed that ~ 93.82 MAD/m 3 (~ 8.64 EURO/m 3 ) is needed to supply the operating cost. As a vital industrial criterion, it was estimated that the conditions of initial pH of 3, [PDS] = 1 mM and T = 25 °C the highest cost efective case of the process for degrading the mixed dyes. Phytotoxicity studies revealed that the degradation products of mixed dyes and textile efuent were scarcely toxic in nature, thereby increasing the applicability of PDS/Fe(II)/UV for the treatment of textile wastewater. This will open a perspective for the reuse of treated water in crop irrigation. Based on the results of the advanced oxidation technologies experiments, it was found that PDS/Fe(II)/UV is the best treatment method for real textile wastewater. Keywords Textile wastewater · Peroxydisulfate · Degradation · Mixed dyes · Cost evaluation · Phytotoxicity Abbreviations AOT Advanced oxidation technology CC Chemical cost DE Degradation efciency RB19 Reactive blue 19 EC Electricity cost UV Ultra violet K Rate constant RR120 Reactive Red 120 PDS Peroxydisulfate RY17 Reactive Yellow 17 COD Chemical oxygen demand MD Mixed dyes Dt Reaction time MAD Moroccan Dirham OC Operating cost TW Textile wastewater BOD Biochemical oxygen demand EEC Electrical energy consumption 1 Introduction Control of water pollution is a very important scientifc research area. The textile industry is among the principle polluting and the largest consumers of water, dyes and chemicals used during the various stages of textile process- ing. The presence of very small quantities of dyes in water can create aesthetic problems, hinders the photosynthesis, and badly afects the aquatic life thereby posing signifcant risk to the food chain [1]. Conventional methods includ- ing physico-chemical methods, coagulation, activated carbon adsorption and membrane technologies have been used for decolorizing the textile wastewater [2–4].However, these methods non-destructive, indeed, all these processes * Nadia Bougdour chimiste.nadia@gmail.com 1 Team Catalysis and Environment, Faculty of Science, Ibn Zohr University, Agadir, Morocco 2 Thermodynamics and Energetics Laboratory, Faculty of Science, Ibn Zohr University, Agadir, Morocco