Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China.
Department of Materials and Nanotechnology, SINTEF Industry, Forskningsveien 1, Oslo, 0373, Norway.
Carbohydr Polym. 2021 May 1;259:117710. doi: 10.1016/j.carbpol.2021.117710. Epub 2021 Jan 29.
Harmful algal blooms induce severe environmental problems. It is challenging to remove algae by the current available treatments involving complicate process and costly instruments. Here, we developed a CaO@PEG-loaded water-soluble self-branched chitosan (CP-SBC) system, which can remove algae from water in one-step without additional instrumentation. This approach utilizes a novel flocculant (self-branched chitosan) integrated with flotation function (induced by CaO@PEG). CP-SBC exhibited better flocculation performance than commercial flocculants, which is attributed to the enhanced bridging and sweeping effect of branched chitosan. CP-SBC demonstrated outstanding biocompatibility, which was verified by zebrafish test and algae activity test. CaO@PEG-loaded self-branched chitosan can serve as an "Air flotation system" to spontaneous float the flocs after flocculation by sustainably released O. Furthermore, CP-SBC can improve water quality through minimizing dissolved oxygen depletion and reducing total phosphorus concentrations.
有害藻类水华会引发严重的环境问题。目前可用的处理方法涉及复杂的工艺和昂贵的仪器，难以去除藻类。在这里，我们开发了一种 CaO@PEG 负载的水溶性自支化壳聚糖（CP-SBC）系统，它可以一步去除水中的藻类，而无需额外的仪器。这种方法利用了一种新型絮凝剂（自支化壳聚糖）与浮选功能（由 CaO@PEG 诱导）相结合。CP-SBC 表现出比商业絮凝剂更好的絮凝性能，这归因于支化壳聚糖增强的桥接和清扫效应。CP-SBC 表现出优异的生物相容性，这通过斑马鱼试验和藻类活性试验得到了验证。负载 CaO@PEG 的自支化壳聚糖可用作“空气浮选系统”，通过持续释放 O2 使絮凝后的絮体自发浮起。此外，CP-SBC 可以通过最小化溶解氧消耗和降低总磷浓度来改善水质。
