[1]何佳闻,何春霞,郭航言,等.5种秸秆生物炭吸附亚甲基蓝及其性能对比研究[J].南京农业大学学报,2019,42(2):382-388.[doi:10.7685/jnau.201807039]
 HE Jiawen,HE Chunxia,GUO Hangyan,et al.Adsorption of methylene blue by five straw biochars and its performance comparison[J].Journal of Nanjing Agricultural University,2019,42(2):382-388.[doi:10.7685/jnau.201807039]
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5种秸秆生物炭吸附亚甲基蓝及其性能对比研究()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
42卷
期数:
2019年2期
页码:
382-388
栏目:
食品与工程
出版日期:
2019-03-19

文章信息/Info

Title:
Adsorption of methylene blue by five straw biochars and its performance comparison
作者:
何佳闻 何春霞 郭航言 明丽
南京农业大学工学院/江苏省智能化农业装备重点实验室, 江苏 南京 210031
Author(s):
HE Jiawen HE Chunxia GUO Hangyan MING Li
College of Engineering/Jiangsu Key Laboratory for Intelligent Agricultural Equipment, Nanjing Agricultural University, Nanjing 210031, China
关键词:
秸秆生物炭亚甲基蓝表征吸附性
Keywords:
strawbiocharmethylene bluesurface featuresadsorb-ability
分类号:
TQ424.3
DOI:
10.7685/jnau.201807039
摘要:
[目的] 亚甲基蓝广泛用于化学指示剂、染料、生物染色剂和药物等领域并在印染工业生产过程中会产生大量有机染料废水并带来巨大的环境风险,为此探讨秸秆生物炭对亚甲基蓝的吸附性能。[方法] 用限氧控温法在500℃下制备5种秸秆(水稻秸秆、玉米秸秆、小麦秸秆、花生秸秆、芦苇秸秆)生物炭,用电镜显微镜扫描、傅里叶红外变换光谱(FTIR)和X射线衍射对5种秸秆生物炭微观结构、官能团、元素进行表征,并用5种秸秆生物炭对亚甲基蓝溶液进行吸附性试验,对比和分析5种秸秆生物炭吸附亚甲基蓝的性能。[结果] 水稻秸秆、小麦秸秆和芦苇秸秆具有圆孔型微孔结构;玉米秸秆和花生秸秆具有平行壁型微孔结构。5种秸秆生物炭的FTIR图谱均含有极性基团和芳香性结构。它们X射线衍射图谱的主峰值均出现在(2θ)介于20.8°~28.1°。pH以及投入量的增加会提高秸秆生物炭吸附能力。吸附动力学符合拟二级动力学模型,吸附等温线符合Langmuir模型。小麦秸秆生物炭对亚甲基蓝吸附能力最大,最大理论吸附量为27.82 mg·g-1;水稻秸秆生物炭和芦苇秸秆生物炭的最大理论吸附量分别为27.28和22.72 mg·g-1;而花生秸秆和玉米秸秆生物炭对亚甲基蓝吸附能力较差。[结论] 在5种秸秆生物炭中,小麦秸秆具有良好的表面特征和吸附亚甲基蓝能力,为有机污染吸附的优选材料。
Abstract:
[Objectives] Methylene blue is widely used in chemical indicators,dyes,biological dyes and pharmaceuticals. It will produce a large number of organic dye wastewater in the process of printing and dyeing industry and bring huge environmental risks.[Methods] Five kinds of biochar(rice straw,corn straw,wheat straw,peanut straw and reed straw) were prepared at 500℃ by the method of oxygen limiting and temperature control. The microstructure,functional group and element of biochar were characterized by scanning electron microscopy,Fourier transform infrared spectroscopy(FTIR) and X-ray diffraction(XRD). The adsorption experiments of methylene blue solution by five kinds of straw biochar were carried out,and the properties of five kinds of straw biochar adsorbed methylene blue solution were compared and analyzed.[Results] Rice straw,wheat straw and reed straw had round hole microporous structure,and corn straw and peanut straw had parallel wall microporous structure. The FTIR spectra of five kinds of straw biochar contained polar groups and aromatic structures. The main peak of the XRD patterns was found to be 2θ was between 20.8° and 28.1°,indicating it was an amorphous structure. pH and the increase of straw biochar input enhanced the adsorption capacity. The adsorption kinetics conformed to a pseudo-second-order kinetic model,and the adsorption isotherm accorded with the Langmuir model. The adsorption capacity of methylene blue by wheat straw biochar was the highest,which was 27.82 mg·g-1. The maximum theoretical adsorption capacity of rice straw and reed straw biochar were 27.28 mg·g-1 and 22.72 mg·g-1,respectively. The adsorption capacity of peanut straw and corn straw biochar to methylene blue was poor.[Conclusions] Among the five kinds of straw biochar,the wheat straw had good surface characteristics and the ability to adsorb methylene blue. It is the preferred material for the adsorption organic contaminants.

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备注/Memo

备注/Memo:
收稿日期:2018-7-18。
基金项目:国家大学生创新训练计划项目(201710307098)
通信作者:何春霞,教授,博导,研究方向为生物质复合材料,E-mail:chunxiahe@tom.com。
更新日期/Last Update: 1900-01-01