板栗刺壳生物炭对废水中Cr(Ⅵ)的吸附特性研究  

Adsorption of chromium(Ⅵ)in wastewater by a biochar made from chestnut burr shell

作　　者：蒋燕舒 李必冬 杨珺杰 李道霞 李婧[2] 王健 刘达玉[2] 肖龙泉[2] JIANG Yan-shu;LI Bi-dong;YANG Jun-jie;LI Dao-xia;LI Jing;WANG Jian;LIU Da-yu;XIAO Long-quan(Sichuan Institute of Food Inspection,Chengdu 611731,China;College of Food and Biological Engineering,Chengdu University,Chengdu 610106,China)

机构地区：[1]四川省食品检验研究院,四川成都611731 [2]成都大学食品与生物工程学院,四川成都610106

出　　处：《应用化工》2021年第9期2457-2462,共6页Applied Chemical Industry

基　　金：四川省重点研发项目(2019YFS0525);四川省科技计划重点研发项目(2020YFS0504)。

摘　　要：以板栗刺壳为前驱体,高铁酸钾为活化剂,通过化学改性制备得到板栗壳生物炭,并研究了其对废水中Cr(Ⅵ)的吸附性能。借助XRD、FTIR、XPS、FESEM等表征手段发现其表面具有较为发达的孔隙结构及丰富的含氧官能团。研究该材料对水中Cr(Ⅵ)的吸附作用发现,pH为2.5时其表现出最佳的吸附效果,90 min可达到最终平衡吸附量的90%以上,属于快速吸附。进一步研究表明,该材料对Cr(Ⅵ)的最大吸附量为61.312 mg/g,其吸附机理类型符合准二级动力学模型与Langmuir模型。A biochar which can efficiently treat Cr(Ⅵ)in wastewater was obtained by adopting the chestnut burr shell as precursor and K 2FeO 4 as activator.By means of XRD,FTIR,XPS and FESEM,etc.,it is found that the biochar possess abundant pore structure and oxygen-containing functional groups.The optimum adsorption effect was studied at pH=2.5,the adsorption mechanism type was consistent with the quasi-second kinetic model and Langmuir model,and within 90 min,the adsorption amount has reached more than 90%of the final equilibrium adsorption amount,with a maximum adsorption capacity of 61.312 mg/g.

关 键 词：板栗刺壳 生物炭 Cr(Ⅵ) 吸附特性 

分 类 号：TQ91[化学工程]