Preparation of Kenaf Biochar and Its Adsorption Properties for Methylene Blue  

作　　者：Xin Wan Zhigang Xia Xiaoli Yang Chenfeng Zhou Yuanming Zhang Haoxi Ben Guangting Han Wei Jiang 

机构地区：[1]College of Textiles,Qingdao University,Qingdao,260000 China [2]State Key Laboratory of Bio Fibers and Eco-Textiles,Qingdao University,Qingdao,266071,China [3]State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan,430000,China [4]Key Laboratory of Textile Fiber and Products(Wuhan Textile University),Ministry of Education,Wuhan,430200,China

出　　处：《Journal of Renewable Materials》2022年第12期3391-3404,共14页可再生材料杂志（英文）

基　　金：This work was supported by National Natural Science Foundation of China(51903131);Natural Science Foundation of Shandong Province(ZR2019QEM007);Key Research and Development Program of Shandong Province(2020CXGC011101);State Key Laboratory of Bio-Fibers and Eco-Textiles(Qingdao University)(ZKT16 and ZKT21);Special Foundation of“Taishan Scholar”Construction Program(ts20190932).

摘　　要：The toxic dyestuff's from printing and dyeing wastewater have caused serious damages to the ecological environ-ment,thus exploring effective methods to remove them having become a key topic.Here,a series of biochar sam-ples were synthesized form kenaf to adsorb methylene blue(MB),which was acted as the dye representative for the test of adsorption capacity due to the presence of abundant double bond and aroma tic heterocyclic ring.By tuning the raw materials and pyrolysis temperature,a super adsorption capacity about 164.21 mg·g^(-1) was obtained over the biochar that pyrolyzed at 700℃ with the kenaf fiber as raw material Through the physical adsorption,elemental analysis,FTIR spectra and NH_(3)-TPD,it was found the high surface area and pore volume of biochar played a key role in the adsorption of MB,and the acidic sites would also assist the adsorption process.Besides,the adsorption kinetic model was ftted and calculated,implying the MB physically adsorbed on the bio-char rapidly and then occurred chemical adsorption on the acidic sites.In addition,through KBC700 recycling experiments,it was found that kenaf biochar had a good binding force to MB,which effectively avoided secondary pollution.This work provides important insights for the adsorption mechanism of MB by biochar,also offers some guidance for the further synthesis of biochar from various biomass.

关 键 词：Kenaf biochar pyrolysis temperature ADSORPTION methylene blue kinetic analysis 

分 类 号：O64[理学—物理化学]