全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

四环素在乌栅土中的吸附与解吸

Keywords: 四环素,乌栅土,吸附解吸,pH,二价阳离子

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用批平衡实验方法,研究了四环素(TC)在太湖地区乌栅土中的吸附解吸,以及pH和典型二价阳离子Ca2+和Mg2+对TC吸附的影响。结果表明,TC在乌栅土中的吸附可以用线性方程拟合,所得Kd和Koc值分别为419.38L·kg-1和19782.07L·kg-1,Kd和Koc值较高,这表明乌栅土中的TC不易迁移和淋溶,对太湖地区地表水和地下水等饮用水源的影响风险较小。对单次吸附解吸过程的结果采用滞后性指数评价TC的解吸的滞后性,得到滞后性指数为2.58,显示TC在乌栅土中的解吸存在明显的滞后性。TC在乌栅土中的吸附也受pH条件和二价阳离子的明显影响,低pH条件可以明显地促进TC在土壤中的吸附,而高pH条件下,TC吸附受到抑制,并更易于达到最大吸附量。通过对低pH条件TC+离子含量分数的分析表明,TC+离子能明显地增加TC在土壤上的吸附,并且其离子所占比例与分配系数具有良好的相关关系。典型二价阳离子Ca2+和Mg2+的存在也可以明显降低TC在土壤上的吸附。

References

[1]  王冉 刘铁铮 王恬.抗生素在环境中的转归及其生态毒性[J].生态学报,2006,26(1):265-270.
[2]  Jagobsen P, Berglind L. Persistence of oxytetracycline in sediments from fish farms[J]. Aquaculture, 1988, 70:365-370.
[3]  Hirsch R, Ternes T, Haberer K, et al. Occurrence of antibiotics in the aquatic environment[J]. Sci Total Environ, 1999, 225 : 109-118.
[4]  Kreuzig R, Kullmer C, Matthies B, et al. Fate and behavior of pharma- ceutical residues in soils[J]. Fresen Environ Bull, 2003, 12: 550-558.
[5]  邓建才 蒋新 王芳 等.潮土中阿特拉津解吸滞后特征[J].环境科学,2005,26(6):137-142.
[6]  Huang W, Yu H, Weber Jr, et al.Hysteresis in the sorption and desorption of hydrophobic organic contaminants by soils and sediments: I.A comparative analysis of experimental protocols[J]. J Contam Hydrol, 1998, 31 : 129-148.
[7]  Huang W, Peng P, Yu Z, et al.Effect of organic matter heterogeneity on the sorption and desorption of organic contaminants by soils and sediments[J]. Appl Geochem, 2003, 18 : 955-972.
[8]  Figueroa R A, Leonard A, Mackay A A. Modeling tetracycline antibiotic sorption to clays[J]. Environ Sci Technol, 2004, 38:476-483.
[9]  Laak T L, Gebbink W A, Tolls J.The effect of pH and ionic strength on the sorption of sulfachloropyridazine, tylosin, and oxytetracycline to soil [J]. Environ Toxic Chem, 2006, 25:904-911.
[10]  Jin L, Amaya-Mazo X, Apel M E, et al.Ca^2+ and Mg^2+ bind tetracycline with distinct stoichiometries and linked deprotonation[J]. Biophy Chem, 2007, 128: 185-196.
[11]  陈翠红 朱琨.表面活性剂对黄土吸附苯甲酸的影响[J].农业环境科学学报,2007,26(2):598-602.
[12]  黄丽 王茹 胡红青 等.有机酸对针铁矿和膨润土吸附Cd^2+,Pb^2+的影响[J].土壤学报,2006,43(1):98-103.
[13]  Andreozzi R, Canterino M, Lo Giudice R, et al. Lincomycin solar photodegradation, algal toxicity and removal from wastewaters by means of ozonation[J]. Water Res, 2006, 40 : 630-638.
[14]  Andreozzi R, Raffaele M, Nicklas P. Pharmaceuticals in STP effluents and their solar photodegradation in aquatic environment[J]. Chemosphere, 2003, 50:1319-1330.
[15]  Sengelov G, Agerso Y, Halling-Sorensen B, et al. Bacterial antibiotic resistance levels in Danish farmland as a result of treatment with pig manure slurry[J]. Environ Int, 2003, 28:587-595.
[16]  Kay P, Blackwell P A, Boxall A B A. A lysimeter experiment to investigate the leaching of veterinary antibiotics through a clay soil and comparison with field data[J]. Environ Pollut, 2005, 134 : 333-341.
[17]  Kummerer K. Drugs in the environment : emission of drugs, diagnostic aids and disinfectants into wastewater by hospitals in relation to other sources-a review[J]. Chemosphere, 2001, 45:957-969.
[18]  许文思.中国抗生素工业[J].中国抗生素杂志,1998,23(2):92-99.
[19]  董长勋 李恋卿 王芳 等.黄泥土对铜的吸附解吸及其pH变化[J].农业环境科学学报,2007,26(2):521-525.
[20]  沈学优 卢瑛莹 等.有机物在水/双阳离子有机膨润土界面的吸附贡献率研究[J].浙江大学学报:理学版,:.
[21]  Shan Z J, Zhu Z L, Hua X M. Investigation of effect of herbicide-suola on groundwater[J]. A cta Sci Circumstantine, 1994, 14: 72-78.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133