Research Progress of Biochar-Based Adsorbents for Phosphorus Removal in Wastewater
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.
biocharadsorption dephosphorizationreclaimationmechanism of actioninfluence factor
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