The 2,4-dichlorophenoxyacetic acid (2,4-D) is an agrochemical used to remove weeds in paddy fields. Due to the toxicity associated, 2,4-D containing water needs treatment. Thus, herein, a sunlight-responsive ZrO-BiO photocatalyst was prepared by green synthesis using cow urine and tested for its efficiency in degrading 2,4-D. The prepared ZrO-BiO was then characterized in detail. The experimental results showed that 40% ZrO-BiO showed the best photocatalytic activity and stable even after five cycles of reuse. Furthermore, the sustainability of the studied technique that was analysed by the newly developed “weightage-based ranking method” showed that the present work addressed 14 of 17 SDGs.

中文翻译：

---

基于牛尿的阳光响应型 ZrO2-Bi2O3 的绿色合成及其在水溶液中光催化 2,4-二氯苯氧基乙酸中的应用 - 动力学、机理和可持续性分析

2,4-二氯苯氧基乙酸 (2,4-D) 是一种用于去除稻田杂草的农用化学品。由于相关毒性，含有 2,4-D 的水需要进行处理。因此，本文利用牛尿通过绿色合成制备了阳光响应型ZrO-Bi2O光催化剂，并测试了其降解2,4-D的效率。然后对制备的 ZrO-Bi2O 进行了详细表征。实验结果表明，40% ZrO-Bi2O表现出最佳的光催化活性，并且即使在重复使用五次后仍保持稳定。此外，通过新开发的“基于权重的排名方法”分析的研究技术的可持续性表明，目前的工作涉及 17 个可持续发展目标中的 14 个。