Abstract：
Marine biofouling directly affects the performance and efficiency of uranium (U(VI)) extraction from seawater. Compared to traditional chemical methods, natural plant extracts are generally biodegradable and nontoxic, making them an environmentally friendly alternative to synthetic chemicals in solving the marine biofouling problem. The effectiveness of natural antibacterial plants (i.e., pine needle, peppermint, Acorus gramineus Soland, Cacumen platycladi, and wormwood) in solving the marine biofouling problem was evaluated in this work. Experimental results showed that natural antibacterial plants could kill Vibrio alginolyticus in solution and effectively solve the marine biofouling problem of U(VI) extraction. To improve the adsorption capacity of natural plants for U(VI) in seawater, poly(vinylphosphonic acid) (PVPA) was modified on natural antibacterial plant surfaces by irradiation grafting technology. PVPA and natural antibacterial plants work as active sites and base materials for the U(VI) extraction material, respectively. The recovery performance of PVPA/pine needle for U(VI) was preliminarily studied. Results show that the adsorption of U(VI) on PVPA/pine needle follows pseudo-second-order and Langmuir models, and the maximum adsorption capacity is 111 mg/g at 298 K and pH 8.2.
摘要：
海洋生物污染直接影响海水中铀（U（VI））提取的性能和效率。与传统的化学方法相比，天然植物提取物通常是可生物降解和无毒的，使它们成为解决海洋生物污染问题的合成化学品的环保替代品。天然抗菌植物的有效性(即，松针,薄荷,苏兰，Cacumenplatycladi,和艾草）在解决海洋生物污染问题中进行了评估。实验结果表明，天然抗菌植物可以杀死溶液中的溶藻弧菌，有效解决U（VI）提取的海洋生物污损问题。为提高天然植物对海水中U(VI)的吸附能力,采用辐照接枝技术在天然抗菌植物表面对聚乙烯膦酸(PVPA)进行改性。PVPA和天然抗菌植物作为U（VI）提取材料的活性位点和基础材料，分别。初步研究了PVPA/松针对U（VI）的回收性能。结果表明,PVPA/松针对U(VI)的吸附遵循伪二阶和Langmuir模型,在298K和pH8.2时，最大吸附容量为111mg/g。
