[1]敖涵婷,曹威,阚晋,等.载锆玉米秸秆生物炭的结构表征及磷吸附效果[J].华侨大学学报(自然科学版),2018,39(6):851-858.[doi:10.11830/ISSN.1000-5013.201807029]
　AO Hanting,CAO Wei,KAN Jin,et al.Structural Characterization and Phosphorus Adsorption of Zirconium-Loaded Corn Stalk Biochar[J].Journal of Huaqiao University(Natural Science),2018,39(6):851-858.[doi:10.11830/ISSN.1000-5013.201807029]
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载锆玉米秸秆生物炭的结构表征及磷吸附效果()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第39卷
期数:
2018年第6期
页码:
851-858
栏目:
出版日期:
2018-11-20

文章信息/Info

Title:
Structural Characterization and Phosphorus Adsorption of Zirconium-Loaded Corn Stalk Biochar
文章编号:
1000-5013(2018)06-0851-08
作者:
敖涵婷;  曹威;  阚晋;  邓彩军;  魏琳
华侨大学 土木工程学院, 福建 厦门 361021
Author(s):
AO Hanting;  CAO Wei;  KAN Jin;  DENG Caijun;  WEI Lin
College of Civil Engineering, Huaqiao University, Xiamen 361021, China
关键词:
玉米秸秆;  生物炭;  锆氧化物;  结构表征;  磷酸盐吸附
Keywords:
corn stalk;  biochar;  zirconium oxide;  structure characterization;  phosphate adsorption
分类号:
X524
DOI:
10.11830/ISSN.1000-5013.201807029
文献标志码:
A
摘要:
以玉米秸秆为原料,利用氧氯化锆浸渍-限氧热解法制备一种新型的载锆生物炭阴离子吸附剂.采用场发射扫描电镜(FE-SEM)、傅里叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)和比表面积测定(BET-N2)等手段,对空白生物炭(BC)及载锆生物炭(Zr-BC)的形貌、组成及结构进行表征.结果表明:热解后的生物炭表面形貌粗糙,均发育有裂纹和蜂窝状大孔结构;与BC相比,Zr-BC比表面积和平均孔径都有降低,且表面元素含C量大幅降低,含O量显著增加,Zr质量分数达到15.7%;Zr-BC表面主要官能团有羟基(-OH)、羧基(-COOH)、锆羟基氧化物等,构成吸附性能的结构基础;当pH值为2时,Zr-BC对磷酸盐吸附效果最显著,符合Freundlich等温吸附线模型.通过多种阴离子混合吸附测试发现,Zr-BC对水中磷酸盐有较高吸附量,且选择性较高.
Abstract:
A novel anion adsorbent, zirconium-impregnated biochar(Zr-BC), was prepared from corn stalk by using zirconium oxychloride impregnation-limited oxygen pyrolysis method. Field emission scanning electron microscopy(FE-SEM), Fourier transform infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy(XPS), and BET-N2 specific surface were employed to characterize the surface morphology, element composition and structure of the zirconium-impregnated biochar(Zr-BC)and the blank biochar(BC). The results showed that Zr-BC had rough surface with plenty of cracks and macropore structure, and its specific surface area and medium pore size were both decreased in contrast to BC. Moreover, Zr-BC surface contained much more O and less C element than that of BC, and Zr content reached 15.7%. Major surface functional groups of Zr-BC included hydroxyl(-OH), carboxyl(-COOH), and particularly zirconium oxyhydroxide, underlying the structural basis for anion adsorption. The adsorption of phosphate by Zr-BC was highly dependent on pH value, and the optimum pH value was 2. The equilibrium isotherm data of phosphate on Zr-BC were well fitted to the Freundlich isotherm models. Adsorption experiments with mixed anions solution showed that Zr-BC had a higher adsorption capacity for phosphate and exhibited high selectivity.

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备注/Memo

备注/Memo:
收稿日期: 2018-07-19
通信作者: 曹威(1984-),男,副教授,博士,主要从事新型低成本高效水处理吸附剂的研制与应用的研究.E-mail:weicao@hqu.edu.cn.
基金项目: 国家自然科学基金资助项目(51408239); 福建省自然科学基金资助项目(2016J01193, 2015J01015)
更新日期/Last Update: 2018-11-20