College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325000, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou University, Wenzhou, Zhejiang 325000, PR China; Institute for Eco-environmental Research of Sanyang Wetland, Wenzhou University, Wenzhou, Zhejiang 325014, PR China.
Bioresour Technol. 2024 Jun;402:130779. doi: 10.1016/j.biortech.2024.130779. Epub 2024 May 1.
Submerged macrophytes are effective in ecological restoration of water bodies polluted by nitrogen and phosphorus, and its restoration capacity depends on underwater illumination condition. This study explored the influencing mechanism of illumination on Vallisneria spinulosa Yan (V. spinulosa Yan) for water restoration. Addition of underwater light source increased the total nitrogen, ammonia nitrogen, total phosphorus, and phosphate removal loads of the V. spinulosa Yan growth system by 61.5, 39.2, 8.5, and 5.0 mg m d, respectively. Meanwhile, the growth of V. spinulosa Yan was obviously promoted, even with high water turbidity. Although the biological nitrogen removal processes were inhibited by adding underwater light source, the growth of V. spinulosa Yan can be significantly improved, thus enhancing the efficiency of water purification via the absorption of nitrogen and phosphorus by V. spinulosa Yan. This study provides a theoretical foundation and technical support for application of submerged macrophytes in ecological water restoration.
沉水植物对氮磷污染水体的生态修复具有显著效果，其修复能力取决于水下光照条件。本研究探讨了光照对苦草（Vallisneria spinulosa Yan）的影响机制及其对水质恢复的影响。增加水下光源可分别使苦草生长系统对总氮、氨氮、总磷和磷酸盐的去除负荷增加 61.5、39.2、8.5 和 5.0mg m-2 d-1。同时，苦草的生长也明显得到促进，即使在高浊度的情况下也是如此。尽管水下光源的添加抑制了生物脱氮过程，但苦草的生长仍可显著提高，从而通过苦草吸收氮磷来提高水净化效率。本研究为沉水植物在生态水修复中的应用提供了理论基础和技术支持。
