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A composite of Ni-Fe-Zn layered double hydroxides/biochar for atrazine removal from aqueous solution

查看全文 作　　者：Yifan [1]Wang;Jiaming [1]Kang;Simeng [1]Jiang;Hui [1]Li;Zheyi [1]Ren;Qinbo [1]Xu;Qun [1]Jiang;Wenzhu [1]Liu;Ruizhen [1]Li;Ying [1]Zhang 高影响力作者 机构地区：[1]School of Resources and Environment,Northeast Agricultural University,Harbin 150030,People’s Republic of China高影响力机构 出　　处：《Biochar》索引2020年第2卷第4期,共10页高影响力期刊 基　　金：This research was supported by the MOA Modern Agricultural Talents Support Project,the Plan for Training Talents with Special Funds for the Development of Local Colleges and Universities by Central Finance,the Second Batch of the National“10,000 Person Plan”in 2016,the National Natural Science Foundation of China(31972941);and the Central Committee Guides Local Science and Technology Development Projects(ZY18A05);Heilongjiang Provincial Key Laboratory of Soil Protection and Remediation. 摘　　要：This study assembled corn stalk-derived biochar(BC)with layered double hydroxide(LDH)through a rapid coprecipitation of biochar and metal(Ni/Fe/Zn)hydroxide precipitates.A BC and LDH composite(BC-LDH)and modified BC-LDH material after heating(BC-LDH-P)were prepared successfully for atrazine adsorptive removal.The physicochemical properties of the synthesized samples were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),Fourier transform infrared(FT-IR),and X-ray photoelectron spectroscopy(XPS).Batch experiments were conducted to study the sorption of atrazine onto BC,BC-LDH,and BC-LDH-P from the aqueous solution.The adsorption of atrazine onto BC-LDH and BC-LDH-P were performed following with the pseudo-second-order kinetic model,and the sorption isotherms agreed well with the Freundlich fitting model.The adsorption amounts of the three materials are arranged in descending order is as follows:BC-LDH-P>BC-LDH>BC(143.15>123.10>95.93 mg g−1,respectively).Due to the high crystallinity of the LDH material and the high binding degree with biochar,Ni/Fe/Zn-LDH biochar composites offer a potential alternative to a carbon-based adsorbent for atrazine removal from aqueous solution. 关 键 词：Layered double hydroxide(LDH) BIOCHAR ATRAZINE ADSORPTION
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