Doctoral School of Exact and Natural Sciences, University of Bialystok, Ciolkowskiego 1K Str., 15-245, Bialystok, Poland.
Department of Analytical and Inorganic Chemistry, Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K Str., 15-245, Bialystok, Poland.
Environ Pollut. 2023 Sep 1;332:121982. doi: 10.1016/j.envpol.2023.121982. Epub 2023 Jun 8.
Phytoremediation of benzotriazoles (BTR) from waters by floating macrophytes is not well understood, but it seems to have the potential to be used in conjunction with conventional wastewater treatment plants. The effectiveness of removing four compounds from the benzotriazole group by floating plants Spirodela polyrhiza (L.) Schleid. And Azolla caroliniana Willd. From the model solution, was studied. The observed decrease in the concentration of studied compounds was in the range 70.5%-94.5% using S. polyrhiza, and from 88.3% to 96.2% for A. caroliniana. It was determined using chemometric methods that the effectiveness of the phytoremediation process is mainly influenced by three parameters: exposure time to light, pH of the model solution and the mass of plants. Using the design of experiments (DoE) chemometric approach, the optimal conditions for removing BTR were selected: plant weight 2.5 g and 2 g, light exposure 16 h and 10 h, and pH 9 and pH 5 for S. polyrhiza and A. caroliniana, respectively. Studies on the mechanisms of BTR removal have shown that the reduction in concentration is mainly due to the process of plant uptake. Toxicity studies have proved that the tested BTR affected the growth of S. polyrhiza and A. caroliniana and induced changes in the levels of chlorophyllides, chlorophylls as well as carotenoids. More dramatic loss in plant biomass and photosynthetic pigment contents was observed in A. caroliniana cultures exposed to BTR.
水生漂浮植物对水体中苯并三唑（BTR）的修复作用尚未得到充分研究，但似乎有可能与传统的污水处理厂联合使用。本研究考察了浮萍（Spirodela polyrhiza（L.）Schleid.）和满江红（Azolla caroliniana Willd.）两种漂浮植物从模型溶液中去除苯并三唑类 4 种化合物的效果。研究发现，浮萍对目标化合物的去除率为 70.5%-94.5%，满江红为 88.3%-96.2%。通过化学计量学方法确定，该修复过程的有效性主要受三个参数的影响：暴露于光下的时间、模型溶液的 pH 值和植物的质量。利用实验设计（DoE）化学计量学方法，选择了去除 BTR 的最佳条件：植物重量分别为 2.5 g 和 2 g、光照时间分别为 16 h 和 10 h、pH 值分别为 9 和 5，分别适用于浮萍和满江红。BTR 去除机制的研究表明，浓度的降低主要是由于植物的吸收过程。毒性研究证明，测试的 BTR 会影响浮萍和满江红的生长，并诱导叶绿素、类胡萝卜素等的含量变化。暴露于 BTR 的满江红培养物中，植物生物量和光合色素含量的损失更为明显。
