两性修饰磁化炭对紫色土吸附菲的增强作用

详细信息    查看全文 | 推荐本文 |

英文篇名：Enhanced Sorption of Phenanthrene on Purple Soil by Adding Amphoteric-modified Magnetized Biochar 作者：张煜镓 ; 李文斌 ; 马莉 ; 康乐 ; 石晓兰 ; 邓红艳 ; 刘伟 ; 孟昭福 英文作者：ZHANG Yujia;LI Wenbin;MA Li;KANG Le;SHI Xiaolan;DENG Hongyan;LIU Wei;MENG Zhaofu;College of Environmental Science and Engineering,China West Normal University;Department of Natural Resource and Environment,Northwest A&F University; 关键词：紫色土 ; BS-12 ; 磁化炭 ; 菲 ; 吸附量 英文关键词：purple soil;;BS-12;;magnetized biochar;;phenanthrene;;adsorption amount 中文刊名：地球与环境 英文刊名：Earth and Environment 机构：西华师范大学环境科学与工程学院;西北农林科技大学资源环境学院; 出版日期：2019-06-21 13:50 出版单位：地球与环境 年：2019 期：05 基金：四川省科技厅项目(2018JY0224);; 西华师范大学基本科研业务费资金项目(17E057);; 国家自然科学基金项目(41271244) 语种：中文; 页：174-180 页数：7 CN：52-1139/P ISSN：1672-9250 分类号：X53

摘要

为了验证两性修饰磁化炭材料对紫色土吸附菲的增强作用,采用共沉淀负载Fe_3O_4法和湿法有机负载分别制备了磁化炭(MC)和不同十二烷基二甲基甜菜碱(BS-12)修饰比例的两性修饰磁化炭(BS+MC),将其以1%的质量比加入到紫色土(PS)中,分别形成PS_(MC)和PS_(BS+MC)混合样品,批处理法研究各混合样品对菲的等温吸附和热力学特征,并对比了不同温度、离子强度和pH值对菲吸附的影响。结果表明:(1) MC和BS-MC材料的添加均增强了PS对菲的吸附能力,菲吸附量呈现PS_(200BS+MC)> PS_(150BS+MC)> PS_(100BS+MC)> PS_C> PS_(MC)> PS_(50BS+MC)> PS_(25BS+MC)> PS的趋势,PS_(BS+MC)对菲的吸附量随着添加材料上BS-12修饰比例的增加而增加。(2)菲在各供试土样上的吸附均表现为增温负效应(物理吸附),溶液pH值变化仅对PS_(150BS+MC)和PS_(200BS+MC)吸附菲有显著影响。离子强度增大不利于各供试土样对菲的吸附。(3) Henry模型适用于描述菲在供试土样上的等温吸附,且该过程呈现自发的、焓减和熵增的特征。从PS_C到PS_(MC)再到PS_(BS+MC),吸附过程呈现自发性、放热量和混乱度均增大的特征。
        To investigate the enhanced sorption of phenanthrene on purple soil by adding amphoteric-modified magnetized biochar,magnetized biochar( MC) and amphoteric-coated magnetized biochar( BS-MC) modified with different ratios of dodecyl dimethyl betaine( BS-12) were prepared by co-precipitating biochar with Fe_3O_4 or with Fe_3O_4 and organic coating,respectively. The materials were added to purple soil( PS) at a mass ratio of 1% to form target soil samples,PSMCand PSBS+MC. Sorption behaviors of phenanthrene on different soil samples and their thermodynamic characteristics were studied using the batch method under different conditions of temperature,p H,and ionic strength. The results indicated the followings:( 1) The sorption capacity of phenanthrene on PS was enhanced by both additives of MC and BS-MC with a trend of PS_(200BS+MC)> PS_(150BS+MC)> PS_(100BS+MC)> PS_C> PS_(MC)> PS_(50BS+MC)> PS_(25BS+MC)> PS. The sorption amount of phenanthrene by PS_(BS+MC) increased as the ratio of BS-12 coating increasing.( 2) Temperature showed a negative effect on phenanthrene sorption capacities on all samples,indicating the physical sorption,p H showed great influence only on PS_(150BS+MC) and PS_(200BS+MC) samples,and ionic strength also showed a negative effect on phenanthrene sorption by all samples.( 3) The Henry model is adequate to describe phenanthrene sorption on all tested samples.In summary,phenanthrene sorption on test soil samples belonged to a spontaneous,enthalpy reducing and entropy increasing process,for the sample series of PSC,PSMCand PS_(BS+MC),their sorption of phenanthrene presented the increasing characteristics of spontaneity,exothermicity and entropy.

引文

[1]王乙震，周绪申，林超，等．南运河生态修复水体有机污染物的污染特征[J]．环境化学，2016,35(2):383-392.
    [2] Trellu C,Mousset E,Pechaud Y,et al. Removal of hydrophobic organic pollutants from soil washing/flushing solutions:A critical review[J].Journal of Hazardous Materials,2016,306:149-174.
    [3]吴城，张晓丽，李关宾．黑碳制备的不同热解温度对其吸附菲的影响[J]．中国环境科学，2007,27(1):125-128.
    [4]陈宝梁，周丹丹，朱利中，等．生物碳质吸附剂对水中有机污染物的吸附作用及机理[J]．中国科学B辑:化学，2008,38(6):530-537.
    [5] Lv G C,Hao J,Liu L,et al. The adsorption of phenol by lignite activated carbon[J]. Chinese Journal of Chemical Engineering,2011,19(3):30-35.
    [6] 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(3):19-33.
    [7]李晓娜，宋洋，贾明云，等．生物质炭对有机污染物的吸附及机理研究进展[J]．土壤学报，2017,54(6):1313-1325.
    [8]王姗，巴淑萍，刘强，等．桑枝基活性炭的制备及其对多环芳烃菲的吸附[J]．净水技术，2013,(6):64-68.
    [9]吴明山，马建锋，杨淑敏，等．磁性生物炭复合材料研究进展[J]．功能材料，2016,47(7):7028-7033.
    [10]姜媛．不同生物质制备的高温生物炭对水中芳香性有机污染物的吸附机制及规律[D]．杭州:浙江大学，2017.
    [11]吴简，刘朋虎，叶菁，等．磁性生物炭吸附废水中重金属的研究进展[J]．亚热带资源与环境学报，2018,13(1):58-65.
    [12] Huang R H,Zheng D S,Yang B C,et al. Preparation and characterization of CTAB-HACC bentonite and its ability to adsorb phenol from phenol from aqueous solution[J]. Water Science and Technology,2011,64(1):286-292
    [13]王韦胜，磁性生物炭填料BAF处理城市生活污水的试验研究[D]．镇江:江苏大学．2016.
    [14]吴明山，马建锋，杨淑敏，等．磁性生物炭复合材料研究进展[J]．功能材料，2016,47(7):7028-7033.
    [15]李文斌，孟昭福，吴琼，等．添加复合吸附剂对塿土吸附菲和Cr(Ⅵ)的影响[J]．环境科学，2016,37(11):4419-4427.
    [16]王腾，谢婷，任爽，等．BS/DTAB复配修饰膨润土的表征及对苯酚、菲的不同吸附模式[J]．农业环境科学学报，2018,37(8):1716-1723.
    [17] Li W B,Liu Z,Meng Z F,et al. Composite modification mechanism of cationic modifier to amphoteric modified kaolin and its effects on surface characteristics[J]. International Journal of Environmental Science and Technology,2016,13(11):2639-2648.
    [18]李文斌，杨淑英，孟昭福，等．DTAB对两性膨润土的复配修饰机制和吸附菲的影响[J]．农业环境科学学报，2015,34(9):1722-1729.
    [19]孟昭福，李荣华，张一平，等．有机修饰塿土对苯胺的吸附[J]．土壤通报，2008,39(1):143-149.
    [20]万卷敏，刘霞，张文娟，等．不同条件下菲和萘在塿土上的吸附特征研究[J]．农业环境科学学报，2011,30(10):1991-1997.
    [21]刘伟，李文斌，孟昭福，等．BS+CTMAB复配修饰黄棕壤对菲的吸附[J]．农业环境科学学报，2018,37(4):725-731.
    [22] Li W B,Meng Z F,Wu Q,et al. Modification mechanism of amphoteric modifier BS-12 on two different clays[J]. Fresenius Environmental Bulletin,2016,25(10):3993-4003.