Adsorption of polycarboxylate dispersant onto imidacloprid particle surfaces

doi:10.3969/j.issn.0438-1157.2013.08.028

Abstract

Abstract: The adsorption characteristics of poly-carboxylate dispersant(Tersperse 2700)onto imidacloprid particle surfaces,such as adsorption thermodynamics,kinetics,adsorption force and adsorption conformation,were studied with determining adsorption amounts by remnants of concentration,adsorption layer thickness and Fourier transform infrared spectroscopy.The thermodynamic parameters obtained are as follows:ΔH_ad<0,ΔG_ad<0,ΔS_ad>0,indicating that the adsorption is a spontaneous exothermic process.The adsorption layer thickness decreases as temperature increases.Theoretically,higher temperature is not beneficial to adsorption process.The result of adsorption kinetics shows that the adsorption of dispersant 2700 onto imidacloprid particle surfaces corresponds with Lagergren adsorption rate equation.The adsorption rate increases with temperature and activation energy E_a=12.62 kJ·mol^-1,so the adsorption process is physical adsorption.The result of adsorption force shows that van der Waals force is an important force at different temperatures.The adsorption is monolayer and multi-point.The hypothetical adsorption model shows that the adsorption stability on imidacloprid particle surfaces is maintained by apparent stereo-hindrance effect and electrostatic repulsion produced by dispersant 2700.

Key words: dispersant, imidacloprid, adsorption, pesticide

摘要： 通过测定吸附量、吸附层厚度和傅里叶红外光谱研究聚羧酸盐分散剂Tersperse 2700在农药吡虫啉颗粒表面的吸附热力学、动力学、吸附作用力和吸附形态。热力学和动力学研究结果表明:吸附等温线符合Langmuir模型,随温度升高Langmuir常数和饱和吸附量明显降低,由ΔG_ad<0、ΔH_ad<0、ΔS_ad>0可知该吸附为自发、放热、熵增过程,结合吸附层厚度随温度升高而降低的现象可认为高温不利于该吸附进行;吸附动力学符合Lagergren方程,半饱和吸附时间随温度升高而降低表明该吸附速率随温度升高而增加,该吸附过程的表观活化能E_a为12.62 kJ·mol^-1,表明该吸附为物理吸附。吸附作用力和吸附形态研究结果表明:分散剂2700在吡虫啉颗粒表面的吸附作用力以范德华力为主;吸附形态为单层多点式吸附,通过建立假设吸附模型认为分散剂2700以空间位阻效应和静电斥力效应共同维持在吡虫啉颗粒表面的吸附稳定性。

关键词: 分散剂, 吡虫啉, 吸附, 农药

CLC Number:

TQ450.4

HAO Han, MA Chao, FENG Jianguo, FAN Tengfei, CHEN Baoying, WU Xuemin. Adsorption of polycarboxylate dispersant onto imidacloprid particle surfaces[J]. CIESC Journal, 2013, 64(8): 2898-2906.

郝汉, 马超, 冯建国, 范腾飞, 陈保莹, 吴学民. 聚羧酸盐分散剂在吡虫啉颗粒表面的吸附特性[J]. 化工学报, 2013, 64(8): 2898-2906.

References 33

[1]	Xu Yan(徐妍).Study on mechanism of physical and chemical stability of chlorfenapry,fluorph andatrazine aqueous suspension concentrate[D].Beijing:Chinese Agricultural University,2011
[2]	Lee M J,Lee M H,Shim C K.Inverse targeting of drug to reticuloendothelial system-rich organs by lipid micro-emulsion with poloxamer 338[J].International Journal of Pharmaceutics,1995,113(2):175-177
[3]	Lu Fusui(路福绥).The physical stabilization of suspension concentrate formulations[J].Agrochemicals(农药),2000,39(10):8-10
[4]	Xu Yan(徐妍),Ma Chao(马超),Liu Shilu(刘世禄),Zhang Zheng(张政),Wang Xiaodong(王晓东),Wu Xuemin(吴学民).Improving the quality of aqueous suspension concentrate of pesticide[J].Modern Agrochemicals(现代农药),2010,9(2):18-24
[5]	Hua Chun(华纯).Imidacloprid and its formulation[J].Modern Agrochemicals(现代农药),2007,6(4):10-13
[6]	Qian Q Z,George S.Effect of motive gases on fine grinding in a fluid energy mill[J].Powder Technology,2002,122(2/3):129-135
[7]	Luckham P F.The physical stability of suspension concentrates with particular reference pharmaceutical and pesticide formulation[J].Pesticide Science,1989,25(1):25-34
[8]	Liu Y Q,Gao L.Dispersion of aqueous alumina suspensions using copolymer with synergistic functional groups[J].Material Chemistry and Physics,2003,82:362-369
[9]	Li Chongzhi(李崇智),Qi Yanjun(祁艳军),Chen Jialong(陈家珑),Feng Naiqian(冯乃谦).Application study on HPC with polycarboxylate water reducer[J].New Building Materials(新型建筑材料),2008,6:57-62
[10]	Visscher K B,Mcintyre P F.Aqueous graft copolymer pigment dispersants[P]:EP,1197536.2002-04-17
[11]	Zhou Mingsong(周明松),Qiu Xueqing(邱学青),Wang Weixing(王卫星).Study on the dispersants of coal water slurry[J].Coal Conversion(煤炭转化),2004,27(3):12-16
[12]	Zhang Wujie(张武杰),Liu Youli(刘佑利).The research of high molecular polymer applying to agricultural chemical dispersant[J].Agricultural Technology & Equipment(农业技术与装备),2009,14:16-17
[13]	Xu Yan(徐妍),Ma Chao(马超),Jia Ran(贾然),Cai Mengling(蔡梦玲),Hu Yijun(胡奕俊),Wu Xuemin(吴学民).Fourier transform infrared spectroscopy and FT-Raman spectrometer study of hyperdispersant on atrazine surface[J].Spectroscopy and Spectral Analysis(光谱学与光谱分析),2011,31(3):640-643
[14]	Xu Yan(徐妍),Sun Baoli(孙宝利),Ma Chao(马超),Zhang Ping(张平),Cai Mengling(蔡梦玲),Wu Xuemin(吴学民).XPS and SEM spectroscopy study of hyperdispersant on atrazine surface[J].Spectroscopy and Spectral Analysis(光谱学与光谱分析),2011, 31(9):2569-2573
[15]	Zhuang Zhanxing(庄占兴),Lu Fusui(路福绥),Liu Yue(刘月),Chen Tiantian(陈甜甜),Luo Wanchun(罗万春).Studies on the adsorption properties of NNO dispersant on the surface of hexaflumuron particles[J].Chinese Journal of Pesticide Science(农药学学报),2008,10(4):477-482
[16]	Zhuang Zhanxing(庄占兴),Lu Fusui(路福绥),Chen Tiantian(陈甜甜),Liu Yue(刘月),Luo Wanchun(罗万春).Adsorption properties of MOTAS dispersant on the interface of hexaflumuron particles[J].Chemical Journal of Chinese Universities(高等学校化学学报),2009,30(2):332-336
[17]	He Youjie(何有节),Man Yanyan(满严严),Shi Bi(石碧).Determination of carboxyl groups in the oxidizing degraded products of black wattle extract by conductometric titration[J].Leather Science and Engineering(皮革科学与工程),2003,13(3):26-29
[18]	Jiang Junshu(蒋俊树),Nie Lei(聂磊).Development of Imidacloprid certified reference material[J].Chemical Analysis and Meterage(化学分析计量),2006,15(3):4-7
[19]	Wu Gang(吴刚).Material Characterization and Application(材料结构表征及应用)[M].Beijing:Chemical Industry Press,2002:356-357
[20]	Yi Conghua(易聪华),Tang Qianqian(汤潜潜),Huang Xin(黄欣),Qiu Xueqing(邱学青).Adsorption behavior of polycarboxylate superplasticizer on cement particle surfaces[J].CIESC Journal(化工学报),2012,63(8):2460-2468
[21]	Pang Yuxia(庞煜霞),Liu Lei(刘磊),Lou Hongming(楼宏铭),Yi Conghua(易聪华),Qiu Xueqing(邱学青).Adsorption characteristics of lignosulfonates on the surface of dimethomorph[J].Chemical Journal of Chinese Universities(高等学校化学学报),2012,33(8):1820-1825
[22]	Bai B J,Wu Y F,Grigg R B.Adsorption and desorption kinetics and equilibrium of calcium lignosulfonate on dolomite porous media[J].Journal of Physical Chemistry C,2009,113(31):13772-13779
[23]	Von O B,Kordel W,Klein W.Sorption of nonpolar and polar compounds to soils processes measurements and experience with the applicability of the modified OECD-GUIDELINE 106[J].Chemosphere,1991,22:285-304
[24]	Yoshioka K,Tazawa E,Kawai K.Adsorption characteristics of water-reducers on cement component minerals[J].Cement and Concrete Research,2002,32:1507-1513
[25]	Zheng Dafeng(郑大锋),Qiu Xueqing(邱学青),Lou Hongming(楼宏铭).Measurement of adsorption layer thickness of water reducer by using XPS[J].Journal of Chemical Industry and Engineering(China)(化工学报),2008,59(1):256-259
[26]	Zhou Mingsong(周明松),Qiu Xueqing(邱学青),Yang Dongjie(杨东杰).Adsorption property of lignin and naphthalene dispersants on coal-water interface[J].Chemical Journal of Chinese Universities(高等学校化学学报),2008,29(5):987-992
[27]	Uzun I,Guzel F.Kinetics and thermodynamics of the adsorption of some dyestuffs and p-nitrophenol by chitosan and MCM-chitosan from aqueous solution[J].Journal of Colloid and Interface Science,2004,274(2):398-412
[28]	Ho Y S,McKay G.Pseudo-second order model for sorption process[J].Process Biochemistry,1999,34:451-465
[29]	Chien S H,Clayton W R.Application of Elovich equation to the kinetics of phosphate release and sorption in soils[J].Soil Science Society of America Journal,1980,44:265-268
[30]	Espinosa J M,Padilla W R,Ontiveros O A,Perea C R.Thermodynamic characterization of the adsorption process of mordant black 17 dye onto polyamide fabric[J].Macromolecular Materials and Engineering,2001,286(5):302-308
[31]	Hendrik N,Murielle R,Pierre L,Paul V M,Will Y V.Removal of PCBs from waste water using fly ash[J].Chemosphere,2003,53(6):655-665
[32]	Victor K D,Robert D V.The effect of adsorbed polystyrene on the stability of graphon dispersions in toluene[J].Journal of Colloid and Interface Science,1976,54(1):22-26
[33]	Toyoharu N.Effect of chemical structure on steric stabilization of polycarbxylate-based superplasticizer[J].Journal of Advanced Concrete Technology,2006,4:225-232

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