Far Eastern Federal University, School of Biomedicine, 8, Sukhanova str., Vladivostok 690091, Russia; A.V. Zhirmunsky Institute of Marine Biology Far Eastern Branch of Russian Academy of Sciences, 17, Palchevskgo str., Vladivostok 690059, Russia.
A.V. Zhirmunsky Institute of Marine Biology Far Eastern Branch of Russian Academy of Sciences, 17, Palchevskgo str., Vladivostok 690059, Russia.
Sci Total Environ. 2016 Sep 15;565:913-921. doi: 10.1016/j.scitotenv.2016.01.108. Epub 2016 Feb 1.
Pectins from sea grasses are considered as promising substances with pronounced metal-binding activity. Due to the high molecular weight and heterogeneous structure, the use of pectins for removal of metal ions is difficult. Technology of directed pectin degradation was developed and homogenous degraded nanoscaled pectin polymers were synthesized. Experimental samples of degraded pectin isolated from Phyllospadix iwatensis were tested for their metal binding activity in comparison with native pectin from this seagrass and commercial citrus pectin. The metal uptake of all pectin compounds was highest within the pH range from 4.0 to 6.0. The Langmuir, Freundlich and BET sorption models were applied to describe the isotherms and constants. Results showed that depolymerized pectin exerts highest lead and cadmium binding activity with pronounced affinity. All pectin compounds were suggested to be favorable sorbents. Therefore, it can be concluded that degraded pectin is a prospective material for creation of metal-removing water treatment systems.
来自海草的果胶被认为是具有显著金属结合活性的有前途的物质。由于其高分子量和异质结构，使用果胶去除金属离子较为困难。因此开发了定向果胶降解技术，并合成了均相降解的纳米级果胶聚合物。实验样品的降解果胶从 Phyllospadix iwatensis 被测试其金属结合活性与天然果胶从这种海草和商业柑橘果胶。所有果胶化合物的金属摄取量在 pH 值 4.0 到 6.0 之间最高。朗缪尔、弗伦德利希和 BET 吸附模型被用来描述等温线和常数。结果表明，解聚果胶表现出最高的铅和镉结合活性，具有明显的亲和力。所有的果胶化合物都被认为是合适的吸附剂。因此，可以得出结论，降解的果胶是一种有前途的材料，可用于创建去除金属的水处理系统。
