Four different plant material extracts containing flavonoid compounds were prepared with fruits of Lycium ruthenicum Murray (LRM) and Vaccinium spp. (VS), Ginkgo biloba L. (GBL) leaves and grape seeds. On the basis of several characterisation, these extracts were then used for functionalising waste wool fibres by an exhaustion dyeing process. Content of deposited flavonoid compounds and aqueous chromium(VI) reductive removal capacity of four plant material extract dyed wool fibres were investigated and compared. The results indicated that LRM and VS extracts contained more flavonoid compounds (0.12-0.15 mg ml⁻¹) than the other two extracts (0.06-0.08 mg ml⁻¹), which led to high content of deposited flavonoid compounds and strong chromium(VI) reductive removal performance of their dyed wool fibres. Importantly, 0.10 mmol L⁻¹ of chromium(VI) species could be almost completely removed by fallen GBL extract dyed wool fibre from water by increasing content of deposited flavonoid compounds up to 8.0 mg g⁻¹, which offer a novel strategy to produce cost-effective, environmental-friendly and renewable chromium(VI) removal material based on waste control by waste.

中文翻译：

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四种不同黄酮类化合物的植物提取物功能化废羊毛加速水性铬 (VI) 还原去除的比较研究

用黑枸杞(LRM) 和Vaccinium spp的果实制备了四种不同的含有类黄酮化合物的植物材料提取物。(VS), Ginkgo biloba L. (GBL) 叶和葡萄籽。在几个表征的基础上，这些提取物随后被用于通过浸染工艺对废羊毛纤维进行功能化。对四种植物提取物染色羊毛纤维的沉积黄酮类化合物含量和水性铬（VI）还原去除能力进行了研究和比较。结果表明，LRM 和 VS 提取物比其他两种提取物（0.06-0.08 mg ml ^{-1 ）含有更多的黄酮类化合物（0.12-0.15 mg ml -1 ）})，这导致其染色的羊毛纤维具有高含量的沉积类黄酮化合物和强铬 (VI) 还原去除性能。重要的是，通过将沉积的类黄酮化合物的含量增加到 8.0 mg g ^-1 ，掉落的 GBL 从水中提取染色羊毛纤维几乎可以完全去除0.10 mmol L ^-1的铬 (VI) ，这提供了一种降低生产成本的新策略-基于废物控制的有效、环保和可再生的铬（VI）去除材料。