Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2E3, Canada.
Department of Agriculture Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada.
Sci Total Environ. 2019 Jan 10;647:1539-1546. doi: 10.1016/j.scitotenv.2018.08.085. Epub 2018 Aug 7.
Biopolymers derived from modified poultry feathers (KB) were developed to target a broad range of potentially toxic trace elements for their removal from synthetic wastewater and industrial process affected water. The chemical modifications increased surface functionality of KBs for enhanced metal adsorption. Unmodified KB (SM-03) added to synthetic wastewater spiked with nine transition and redox sensitive elements (30-50 μg L each) removed >82% of Pb, Ni, Co and Zn, whereas modified KBs (SM-01 and SM-06) removed 68-100% of Se, V and Cr. Similar results were observed when spiked process water was used. Experimental observation suggested chemical reduction of redox sensitive elements on the modified KB surfaces to their non-toxic/non-mobile redox states. Biopolymer SM-06 showed a maximum adsorption capacity of 17 mg g for V and 15 mg g for Cr at ~20 °C. Due to the abundance of raw material and simplicity of the modifications presented here, modified KBs may serve as a useful option for large-scale water treatment.
从改性家禽羽毛（KB）中提取的生物聚合物旨在去除合成废水中和受工业过程影响的水中的多种潜在有毒痕量元素。化学修饰增加了 KB 的表面功能，以增强金属吸附。未改性的 KB（SM-03）添加到含有 9 种过渡和氧化还原敏感元素（每种 30-50μg/L）的合成废水中，可去除>82%的 Pb、Ni、Co 和 Zn，而改性的 KB（SM-01 和 SM-06）则可去除 68-100%的 Se、V 和 Cr。当使用加标工艺水时，观察到了类似的结果。实验观察表明，改性 KB 表面上的氧化还原敏感元素被化学还原为无毒/非迁移的氧化还原态。生物聚合物 SM-06 在~20°C 时对 V 的最大吸附容量为 17mg/g，对 Cr 的最大吸附容量为 15mg/g。由于原料丰富，且此处介绍的修饰方法简单，改性 KB 可能是大规模水处理的一种有用选择。
