Hexavalent chromium(Cr(Ⅵ))is found in a variety of effluents,such as electroplating,printing,tanning,dyes,ceramics,etc.[1,2].The acute toxicity of Cr(Ⅵ),the tremendous industrial consump-tion and the low deposit of chromium element make it essential to detoxicate Cr(Ⅵ)and recover Cr from Cr(Ⅵ)containing wastew-ater[3].Shortcomings such as harsh reaction conditions,high cost,additive of toxic reductants,secondary pollution,and lack of selec-tivity are present in commonly reported approaches or traditional methods(Table S1 online)[4-6].The utilization of abundant natu-ral biomass for environmental remediation is in line with sustain-able development[7].Xu et al.[8]and Shen et al.[9]converted biomass into photocatalyst or absorbent for Cr(Ⅵ)removal.Never-theless,the harsh conditions like high temperature and pressure,the concentrated acid as well as the introduction of other metal ions required for the preparation of biomass-based materials make these approaches complicated,not cost-effective,and less environ-mentally friendly.Here,we developed a novel method that uses native biomass(i.e.,starch,chitin,and chitosan)directly without any further treatment for efficient and selective extraction of aque-ous Cr(Ⅵ)under visible light irradiation and mild reaction condition.

Ling Yao;Zewen Shen;Zhuoyu Ji;Yezi Hu;Duoyue Tang;Guixia Zhao;Xiangke Wang

College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China

科学通报（英文版）

[1]Ling Yao;Zewen Shen;Zhuoyu Ji;Yezi Hu;Duoyue Tang;Guixia Zhao;Xiangke Wang-.Cr(Ⅵ)detoxification and simultaneous selective recovery of Cr resource from wastewater via photo-chemical extraction using biomass)[J].科学通报（英文版）,2022(21):2154-2157

tanning,detoxicate

detoxification,simultaneous,selective,recovery,resource,from,wastewater,via,chemical,extraction,using,biomass,Hexavalent,chromium,found,variety,effluents,such,electroplating,printing,dyes,ceramics,etc,acute,toxicity,tremendous,industrial,consump,low,deposit,element,make,essential,containing,Shortcomings,harsh,reaction,conditions,high,cost,additive,reductants,secondary,pollution,lack,tivity,are,present,commonly,reported,approaches,traditional,methods,Table,S1,online,utilization,abundant,natu,ral,environmental,remediation,sustain,development,Xu,Shen,converted,into,photocatalyst,absorbent,removal,Never,theless,like,temperature,pressure,concentrated,acid,well,introduction,other,metal,required,preparation,materials,these,complicated,not,effective,mentally,friendly,Here,developed,novel,that,uses,native,starch,chitin,chitosan,directly,without,any,further,treatment,efficient,aque,under,visible,light,irradiation,mild

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