生物炭基吸附剂去除污水中磷的研究进展

Research Progress of Biochar-Based Adsorbents for Phosphorus Removal in Wastewater

控制水体富营养化的需求和磷矿供应短缺的现状促使人们寻求能够从废水中分离和回收磷的技术。生物炭基吸附剂对污水中的磷具有较高的选择性和去除效率。文章综述了生物炭基吸附剂的制备方法、吸附能力、可再生性以及磷回收应用的研究现状,梳理总结了生物炭基吸附剂除磷过程的影响因素和作用机理,提出了通过不同原料复配或改性提高生物炭基材料对磷的吸附选择性、不同吸附位点对不同形态磷的作用机制、考虑磷与新污染物等共存体系的研究展望,提高其经济性并促进资源回收,推动生物炭基吸附剂的应用。

The need of control eutrophication and the short supply of phosphorite urge people to seek technologies for separation and recovery of phosphorus from wastewater.Biochar-based adsorbents exhibit higher removal selectivity and efficiency for phosphorus in wastewater.The preparation methods,adsorption capacity,reclaiming and recovery of phosphorus by biochar-based adsorbents are reviewed.Besides,influence factors and the mechanism of action for phosphorus removal by biochar-based adsorbents are summarized.The research perspectives of improving the adsorption selectivity of biochar-based materials by compounding or modifying raw materials,the mechanism of different adsorption sites for different forms of phosphorus,considering the coexistence of phosphorus and emerging contaminants,are proposed.The economy of biochar-based adsorbents should be improved and resource recovery should be facilitated to promote the application of biochar-based adsorbents.