添加小麦秸秆生物炭对黄土吸附苯甲腈的影响

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摘要

选择苯甲腈为目标污染物,研究添加不同热解温度制备小麦秸秆生物碳对黄土吸附苯甲腈的影响. 研究表明:不加生物炭黄土对苯甲腈的吸附约8h达到平衡,而加入生物炭后,黄土对苯甲腈的吸附时间缩短,并随着加入生物炭热解温度的升高,吸附平衡时间缩短越明显,同时,黄土对苯甲腈的饱和吸附量也显著增加;添加生物炭黄土对苯甲腈的动力学吸附数据显示较好的符合了准二级动力学方程;无论是否添加生物炭,苯甲腈在黄土上的吸附都符合Freundlich吸附的等温模型,随系统温度升高,添加生物炭黄土对苯甲腈的饱和吸附量也显著增加,表明该吸附过程为吸热反应;苯甲腈在黄土上的吸附等温线符合C-型吸附等温模式. 计算结果显示,平均吸附自由能E介于1.865~3.171kJ/mol,表明苯甲腈在黄土上的吸附,无论是否添加生物炭,都以物理吸附为主;热力学参数计算结果显示,无论是否添加生物炭,黄土对苯甲腈的吸附过程中吉布斯自由能ΔG^θ均小于0、熵变ΔS^θ和焓变ΔH^θ均大于0,表明土壤对苯甲腈的吸附为自发进行的吸热过程. 研究结果说明,添加生物炭黄土对苯甲腈的吸附过程包含表面吸附和颗粒内部扩散、外部液膜扩散等机制.

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	蒋煜峰
	Uwamungu Jean Yves
	孙航
	胡雪菲
	慕仲锋
	展惠英
	LIU Peng-yu

关键词 ：黄土, 苯甲腈, 吸附动力学, 吸附热力学, 吸附机理

Abstract：

Benzonitrile was selected as the target pollutant to investigate the effect of biochar produced from wheat residue at different temperatures on the adsorption of benzonitrile onto loess soil. The results showed that the adsorption equilibrium of benzonitrile onto loess was about 8h without biochar, and after the addition of biochar into loess soil, the adsorption equilibrium time of benzonitrile was shortened, meanwhile, with the increase of pyrolysis temperature of biochar added into soil, the adsorption equilibrium time was obviously reduced, while the saturation adsorption amount of benzonitrile onto loess soil was also significantly increased. The kinetic data showed that the adsorption of benzonitrile onto loess soil could be better described by a pseudo-second-order kinetic model, the boundary layer control and intraparticle diffusion were both involved in the adsorption process. Besides, the adsorption equilibrium data were well described by the Freundlich isothermal model. The saturated adsorption capacity was improved as temperature increased with or without the biochar, suggesting a spontaneous endothermic process. The average adsorption free energy E was between 1.865and 3.171kJ/mol, which indicated that adsorption of benzonitrile onto loess was physical adsorption with or without biochar. Thermodynamic parameter analysis showed that Gibbs free energy was less than zero, while Entropy (ΔH^θ) and Enthalpy (ΔS^θ) were greater than zero, indicating an endothermic process for adsorption of benzonitrile onto loess soil. The results indicated that the adsorption process of benzonitrile onto loess with the addition of biochar involved a surface adsorption, diffusion within the particles, and external film diffusion mechanism.

Key words： loess soil benzonitrile adsorption kinetics adsorption thermodynamics adsorption mechanism

收稿日期: 2015-09-30

PACS:

X53

基金资助:

国家自然科学基金项目(41363008,21067005,41272147)

通讯作者: 蒋煜峰 E-mail: jiangyf7712@126.com

作者简介: 蒋煜峰(1977-),男,甘肃张掖人,博士/副教授,主要从事土壤污染控制研究.发表论文50余篇.

引用本文:

蒋煜峰, Uwamungu Jean Yves, 孙航, 胡雪菲, 慕仲锋, 展惠英, LIU Peng-yu. 添加小麦秸秆生物炭对黄土吸附苯甲腈的影响[J]. 中国环境科学, 2016, 36(5): 1506-1513. JIANG Yu-feng, UWAMUNGU J. Yves, SUN Hang, HU Xue-fei, MU Zhong-feng, ZHAN Hui-ying, LIU Peng-yu. Effect of wheat-waste biochar on the adsorption behavior of benzonitrile onto loess soil. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(5): 1506-1513.

链接本文:

http://manu36.magtech.com.cn/Jweb_zghjkx/CN/ 或 http://manu36.magtech.com.cn/Jweb_zghjkx/CN/Y2016/V36/I5/1506

[1]	Rasmussen J J, Wiberg-Larsen P, Baattrup-Pedersen A, et al. The legacy of pesticide pollution: An overlooked factor in current risk assessments of freshwater systems [J]. Water Research, 2015,84:25-32.
[2]	Gevao B, Semple K T, Jones K C. Bound pesticide residues in soils: a review [J]. Environ. Pollut, 2000,108(1):3-14.
[3]	Navarro S, Vela N, Navarro G. An overview on the environmental behaviour of pesticide residues in soils [J]. Spanish Journal of Agricultural Research, 2007,5(3):357-375.
[4]	Liu A A, Huang Z, Deng G H, Guo Y. Adsorption of benzonitrile at the air/water interface studied by sum frequency generation spectroscopy [J]. Chinese Science Bulletin, 2013,58(13):1529-1535.
[5]	International Program on Chemical Safety (IPCS), ICSC1103 Benzonitrile[R/OL], http://www.inchem.org/documents/icsc/icsc/ eics1103.htm.
[6]	曾芳,刘忠珍,王荣辉,等.理化性质对土壤吸附-解吸苄嘧磺隆的影响 [J]. 环境科学研究, 2015,28(7):1107-1113.
[7]	张涛,徐冰冰,吴丰昌.腐殖酸对苯并三唑的吸附动力学及热力学研究 [J]. 环境科学研究, 2014,27(5):540-546.
[8]	高敏苓,宋文华,依艳丽.棕壤不同粒径组分对阿特拉津吸附-解吸作用的影响 [J]. 南开大学学报(自然科学版), 2009,42(6): 92-98.
[9]	BUSTER H R. Atrazine and other S-trazine herbicides in lakes and rains in Switzerland [J]. Environmental Science and Technology, 1990,24:1049-1058.
[10]	杨炜春,王琪全,刘维平.除草剂阿特拉津在土壤-水环境中的吸附及其机理 [J]. 环境科学, 2000,21(4):94-97.
[11]	Lehmann J, Joseph S. Biochar for Environmental Management: Science, Technology and Implementation [M]. Earthscan Publications Ltd., London, UK. 2015.
[12]	郎印海,刘伟,王慧.生物炭对水中五氯酚的吸附性能研究 [J]. 中国环境科学, 2014,34(8):2017-2023.
[13]	孙宏文编.生物炭与环境 [M]. 北京:化学工业出版社, 2013.
[14]	王宁,侯艳伟,彭静静,等.生物炭吸附有机污染物的研究进展 [J]. 环境化学, 2012,31(3):287-295.
[15]	Hao F H, Zhao X C, Ouyang W, et al. Molecular structure of corncob-derived biochars and the mechanism of atrazine sorption [J]. Agron. J. 2013,105(3):773-782.
[16]	Tan X, Liu Y, Zeng G, et al. Application of biochar for the removal of pollutants from aqueous Solutions [J]. Chemosphere, 2015,125:70-85.
[17]	Ahmad M, Rajapaksha A U, Lim J E, et al. Biochar as a sorbent for contaminant management in soil and water: A review [J]. Chemosphere, 2014,99:19-33.
[18]	Xiao F, Pignatello J J. Interactions of triazine herbicides with biochar: Steric and electronic effects [J]. Water Research, 2015, 80:179-188.
[19]	Cabrera A, Cox L, Spokas K, et al. Influence of biochar amendments on the sorption-desorption of aminocyclopyrachlor, bentazone and pyraclostrobin pesticides to an agricultural soil [J]. Sci. Total Environ. 2014, 470-471:438-443.
[20]	Kasozi G N, Zimmerman A R, Nkedi-Kizza P, et al. Cate and humic acid sorption onto a range of laboratory-prod black carbons (biochars) [J]. Environmental science technology, 2010, 44(16):6189-6195.
[21]	张继义,李金涛,鲁华涛,等.小麦秸秆生物碳质吸附剂从水中附硝基苯的机理 [J]. 环境科学研究, 2012,25(3):333-339.
[22]	杨乐,邓辉,李国学,等.新疆绿洲区秸秆燃烧污染物释放量及固碳减排潜力 [J]. 农业环境科学学报, 2015,34(5):988-993.
[23]	胡雪菲.生物碳对寒旱区石油污染黄土中多环芳烃吸附行为影响的研究 [D]. 兰州:兰州交通大学, 2014.
[24]	Ho Y S, McKay G. Sorption of dye from aqueous solution by peat [J]. Chemical Engineering Journal, 1998,70:115-124.
[25]	Ho Y S, McKay G. The kinetics of sorption of basic dyes from aqueous solution by sphagnum moss peat [J]. Canadian Journal of Chemical Engineering, 1998,76:822-827.
[26]	Ho Y S, McKay G. Kinetic models for the sorption of dye from aqueous solution by wood [J]. Journal of Environmental Science and Health Part B: Process Safety and Environmental Protection, 1998,76(B2):183-191.
[27]	Weber W J, Jr Morriss J C. Kinetics of adsorption on carbon from solution [J]. Journal of Sanitary Engineering Division: American Society of Civil Engineering, 1963,89:31-60.
[28]	Langmuir I. The adsorption of gases on plane surfaces of glass, mica and platinum [J]. Journal of American Chemical Society, 1918,40:1361-1403.
[29]	Freundlich H. Uber die adsorption in losungen (Adsorption in solution) [J]. Physical Chemistry Periodical, 1906,57:384-470.
[30]	Dubinin M M, Zaverina E D, Radushkevich L V. Sorption and structure of active carbons. I. Adsorption of organic vapors [J]. Russian Journal of Bioorganic Chemistry, 1947,21:1351-1362.
[31]	Jiang Y F, Sun H, Yves U J, et al. Impact of biochar produced from post-harvest residue on the adsorption behavior of diesel oil on loess soil [J]. Environmental Geochemistry and Health, 2015,DOI 10.1007/s10653-015-9712-1.
[32]	Chen Z, Chen B, Chiou C T. Fast and slow rates of naphthalene sorption to biochars produced at different temperatures [J]. Environ. Sci. Technol, 2012,46(20):11104-11111.
[33]	邓建才,蒋新,胡维平,等.吸附反应时间对除草剂阿特拉津吸附行为的影响 [J]. 生态环境, 2007,16(2):402-406.
[34]	Karapanagioti H K, Kleineidam S, Sabatini D A, et al. Impacts of heterogeneous organic matter on phenanthrene sorption: equilibrium and kinetic studies with aquifer material [J]. Environ. Sci. Technol., 2000,34(3):406-414.
[35]	Chen J P, Wu S, Chong K H. Surface modification of a granular activated carbon by citric acid for enhancement of copper adsorption [J]. Carbon, 2003,41:1979-1986.
[36]	Jiang Y F, Sun H, Yves J U, et al. Impact of biochar produced from post-harvest residue on the adsorption behavior of diesel oil on loess soil [J]. Environ. Geochem. Health. 2015, DOI 10.1007/s10653-015-9712-1.
[37]	Özcan A, Özcan A S, Tunali S, et al. Determination of the equilibrium, kinetic and thermodynamic parameters of adsorption of copper (II) ions onto seeds of Capsicum annuum [J]. J. Hazard. Mater., 2005,B124:200-208.
[38]	俞美花.生物质炭对环境中阿特拉津的吸附解吸作用及机理研究 [D]. 北京:中国矿业大学, 2014.
[39]	Kiran I, Akar T, Ozcan A S, et al. Biosorption kinetics and isotherm studies of Acid Red 57by dried Cephalosporium aphidicola cells from aqueous solutions [J]. Biochem. Eng. J. 2006,31:197-203.
[40]	Tan W, Li G, Bai M, et al., The study of adsorption mechanism of mixed pesticides prometryne-acetochlor in the soil-water system [J]. International Biodeterioration & Biodegradation, 2015, 102:281-285.
[41]	谢国红,陈军,李德广,等.土壤吸附五氯酚钠的热力学研究 [J]. 安徽农业科学, 2006,34(2):2811-2812.
[42]	Vonopen B, Kordel W, Klein W. Sorption of nonpolar and polar compounds to soils: Processes, measurement and experience with the applicability of the modified OECD-guideline [J]. Chemosphere, 1991,22:285-304.
[43]	陈虹.石油烃在土壤上的吸附行为及对其它有机污染物吸附的影响 [D]. 大连:大连理工大学, 2009.
[44]	张鹏.生物炭对西维因与阿特拉津环境行为的影响 [D]. 天津:南开大学, 2013.张彩霞.生物炭对五氯酚钠和克百威在黄土中的吸附影响 [D]. 兰州:西北师范大学, 2014.
[45]	张彩霞.生物炭对五氯酚钠和克百威在黄土中的吸附影响 [D]. 兰州:西北师范大学, 2014.