Background: Environmental pollution has become a worldwide problem. In this regard, decontamination of wastewater and removal of organic pollutants from environment by photocatalysis has emerged as one of the most promising techniques from the last few decades.

Objective: In order to degrade the harmful pollutants from wastewater, highly efficient non-toxic Fe₂(WO₄)₃ photocatalyst was synthesized via co precipitation method. The photocatalytic activity of the as-synthesized material was examined by degrading methylene blue (MB) under various conditions.

Methods: For this purpose, different experimental parameters such as catalyst load, model compound concentration, H₂O₂ percentage and pH value were adjusted for excellent degradation of MB, and response surface methodology (RSM) along with central composite design (CCD) as adequate model was employed for optimization process.

Results: The experimental results revealed that 1.2 g/L of catalyst load, 10 g/L for dye concentration, 0.5% of H₂O₂ and pH 7 were found to be the optimized values for the aforesaid parameters. The optimized values led to 93% degradation of MB under UV light exposure. In addition, toxicological studies were analysed using various bioassays for both, untreated and treated samples and a conspicuous reduction (69.12%) in the toxicity level was observed.

Conclusion: The study signifies that this method is useful for reclamation of water, making it useful for industry and irrigation.

背景：环境污染已成为世界性问题。在这方面，过去几十年来，通过光催化对废水进行净化和从环境中去除有机污染物已成为最有前途的技术之一。

目的：为了降解废水中的有害污染物，采用共沉淀法合成了高效的无毒Fe ₂（WO ₄）₃光催化剂。通过在各种条件下降解亚甲基蓝（MB）来检查合成后材料的光催化活性。

方法：为此，调整了不同的实验参数，例如催化剂负载量，模型化合物浓度，H ₂ O ₂百分比和pH值，以实现MB的优异降解，并采用响应面方法（RSM）和中央复合设计（CCD）作为参数。适当的模型用于优化过程。

结果：实验结果表明，催化剂负载量为1.2 g / L，染料浓度为10 g / L，H ₂ O _2的0.5％和pH 7是上述参数的最佳值。优化值导致在紫外线下MB降解93％。另外，使用各种生物测定方法对未处理和处理过的样品进行了毒理学研究，观察到毒性水平显着降低（69.12％）。

结论：该研究表明该方法可用于水的再生，可用于工业和灌溉。