One-step removal of harmful algal blooms by dual-functional flocculant based on self-branched chitosan integrated with flotation function
| Autor: | Tian Hu, Xia-Xiao Wu, Tianfu Wu, Huaitian Bu, Sun Chao, Yongtao Li, Lin Minzhao, Zeng-Lin Li, Gang-Biao Jiang, Wei-Xiong Li |
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| Rok vydání: | 2020 |
| Předmět: |
Flocculation
Polymers and Plastics Biocompatibility Harmful Algal Bloom One-Step Biocompatible Materials macromolecular substances 02 engineering and technology 010402 general chemistry 01 natural sciences Algal bloom Polyethylene Glycols Chitosan chemistry.chemical_compound Algae Materials Chemistry Animals Total phosphorus Zebrafish biology Organic Chemistry technology industry and agriculture Oxides Phosphorus Calcium Compounds 021001 nanoscience & nanotechnology Pulp and paper industry biology.organism_classification 0104 chemical sciences Oxygen Kinetics chemistry Larva 0210 nano-technology Porosity |
| Zdroj: | Carbohydrate polymers. 259 |
| ISSN: | 1879-1344 |
| Popis: | 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 CaO2@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 CaO2@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. CaO2@PEG-loaded self-branched chitosan can serve as an "Air flotation system" to spontaneous float the flocs after flocculation by sustainably released O2. Furthermore, CP-SBC can improve water quality through minimizing dissolved oxygen depletion and reducing total phosphorus concentrations. |
| Databáze: | OpenAIRE |
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