Effects of xanthan gum on atomization and deposition characteristics in water and Silwet 408 aqueous solution

Shilin Wang, Xiongkui He, Jianli Song, Shuangshuang Wang, Xiaoming Jia, Yun Ling

Abstract


In order to investigate the effects of viscosity on spray formation and utilization of pesticide, different concentrations of xanthan gum (XG) were added into water and 0.1% Silwet 408 aqueous solution. Droplet size, relative span (RS), fan angle, length of breakup and maximum retention (Rm) were measured with the LU120-02 nozzle spraying under the pressure of 0.3 MPa. The dynamic spreading of the different solutions on maize leaves was tested using a 5 μL micro-injector. The results showed: VMD, RS, length of breakup and Rm went up as the increasing of XG concentration in the range of 0-0.5% with the same solution, while the fan angle of nozzle and spreading area on maize leaf showed the opposite tendency. Silwet 408 could reduce the surface tension of liquid, which could alter the dominant mode of spray formation and lead to earlier sheet breakup, especially in low viscosity solutions. Under the same concentration of XG the addition of Silwet 408 could reduce the RS of drop size spectrum but has no effect on VMD or fan angle. In water solution, there was no difference with different concentrations of XG in the spreading time on maize leaf. Besides, in the 0.1% Silwet 408 aqueous solution, the spraying time and area were several-fold of that in water with same XG concentration. Moreover, with the same XG concentration, the smaller surface tension liquid indicated lower Rm, and the difference was magnified as the concentration increases. This work has demonstrated that initial spray characteristics such as droplet size and RS, fan angle, length of breakup, Rm and spreading area can vary depending on the viscosity of spray liquids. Therefore, by transforming the viscosity of the spray liquid to adjust the droplet spectrum to reduce drift, increasing the Rm and spreading area to improve liquid utilization and reduce the usage of pesticides.
Keywords: atomization, xanthan gum, spray, droplet size, breakup length, dynamic spreading
DOI: 10.25165/j.ijabe.20181103.3802

Citation: Wang S L, He X K, Song J L, Wang S S, Jia X M, Ling Y. Effects of xanthan gum on atomization and deposition characteristics in water and Silwet 408 aqueous solution. Int J Agric & Biol Eng, 2018; 11(3): 29–34.

Keywords


atomization, xanthan gum, spray, droplet size, breakup length, dynamic spreading

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References


Matthews G A, Bateman R, Miller P. Pesticide Application Methods. John Wiley & Sons, 2014.

Hilz E, Vermeer A W P. Spray drift review: The extent to which a formulation can contribute to spray drift reduction. Crop Protection, 2013; 44: 75–83.

Werner S R L, Jones J R, Paterson A H J, Archer R H, Pearce D L. Droplet impact and spreading: Droplet formulation effects. Chemical Engineering Science, 2007; 62(9): 2336–2345.

Sikalo S, Marengo M, Tropea C, Ganic E N. Analysis of impact of droplets on horizontal surfaces. Experimental Thermal & Fluid Science, 2002; 25(7): 503–510.

Wang M, Lin F, Ong J Y, Lin S. Dynamic behaviors of droplet impact and spreading-Water on glass and paraffin. Colloids & Surfaces A: Physicochemical & Engineering Aspects, 2009; 339(1): 224–231.

Lefebvre A H, McDonell V G. Atomization and sprays. CRC press, 2017.

Nuyttens D, Baetens K, De Schampheleire M, Sonck B. Effect of nozzle type, size and pressure on spray droplet characteristics. Biosystems Engineering, 2007; 97(3): 333–45.

Dorr G J, Hewitt A J, Adkins S W, Hanan J, Zhang H, Noller B. A comparison of initial spray characteristics produced by agricultural nozzles. Crop Protection, 2013; 53: 109–117.

Ellis A, Swan T, Miller P, Waddelow S, Bradley A, Tuck C R. Design factors affecting spray characteristics and drift performance of air induction nozzles. Biosystems Engineering, 2002; 82(3): 289–296.

Sidahmed M M. A theory for predicting the size and velocity of droplets from pressure nozzles. Transactions of the ASAE, 1996; 39(2): 385–391.

Czaczyk Z. Influence of air flow dynamics on droplet size in conditions of air-assisted sprayers. Atomization & Sprays, 2012; 22(4): 275–282.

Vallet A, Tinet C. Characteristics of droplets from single and twin jet air induction nozzles: A preliminary investigation. Crop Protection, 2013; 48: 63–68.

Fritz B K, Hoffmann W C, Bagley W E, Kruger G R, Czaczyk Z, Henry R S. Measuring droplet size of agricultural spray nozzles-measurement distance and airspeed effects. Atomization & Sprays, 2014; 24(9): 747–760.

Wang S, Dorr G J, Khashehchi M, He X. Performance of Selected Agricultural Spray Nozzles using Particle Image Velocimetry. Journal of Agricultural Science & Technology, 2015; 17(3): 601–613.

Hilz E, Vermeer AWP. Spray drift review: The extent to which a formulation can contribute to spray drift reduction. Crop Protection, 2013; 44: 75–83.

Hewitt A J. Spray optimization through application and liquid physical property variables–I. Environment Systems and Decisions, 2008; 28(1): 25–30.

Ellis M, Tuck CR, Miller P. The effect of some adjuvants on sprays produced by agricultural flat fan nozzles. Crop Protection, 1997; 16(1): 41–50.

Miller P, Ellis M. Effects of formulation on spray nozzle performance for applications from ground-based boom sprayers. Crop Protection, 2000; 19(8-10): 609–615.

Ellis M, Tuck CR, Miller P. How surface tension of surfactant solutions influences the characteristics of sprays produced by hydraulic nozzles used for pesticide application. Colloids & Surfaces A: Physicochemical &

Engineering Aspects, 2001; 180(3): 267–276.

Qin K, Cloeter M, Tank H. Modeling the Spray Atomization of Emulsion Embedded Agricultural Solutions. Journal of ASTM International, 2010; 7(10): 1–9.

Rangel R H, Sirignano W A. Nonlinear growth of Kelvin–Helmholtz instability: Effect of surface tension and density ratio. Physics of Fluids, 1988; 31(7): 1845–1855.

Deng W, Meng Z J, Chen L P. Measurement Methods of Spray Droplet Size and Velocity. Journal of Agricultural Mechanization Research, 2011; 33(5): 26–30. (in Chinese)

Zhu J W, Shi J, Zhu G N. Influence of Droplet Size and Spray Volume on Retention of Chlorpyrifos on Cabbage Leaves. China Vegetables, 2003; 1(6): 3–5. (in Chinese)

Werner S R L, Jones J R, Paterson A H J, Archer R H, Pearce D L. Droplet impact and spreading: Droplet formulation effects. Chemical Engineering Science, 2007; 62(9): 2336–2345.

Crooks R, Cooper-Whitez J, Boger D V. The role of dynamic surface tension and elasticity on the dynamics of drop impact. Chemical Engineering Science, 2001; 56(19): 5575–5592.

Sikalo S, Marengo M, Tropea C, Ganic E N. Analysis of impact of droplets on horizontal surfaces. Experimental Thermal & Fluid Science, 2002; 25(7): 503–510.

Bertola V. Effect of polymer additives on the apparent dynamic contact angle of impacting drops. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2010; 363(1-3): 135–140.

Wang M, Lin F, Ong J Y, Lin S. Dynamic behaviors of droplet impact and spreading-Water on glass and paraffin. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2009; 339(1): 224–231.

Sybranda V Z, Brink J, Calitz F J, Coertze S, Fourie PH. The use of adjuvants to improve spray deposition and Botrytis cinerea control on Chardonnay grapevine leaves. Crop Protection, 2010; 29(1): 58–67.

Garcera C, Molto E, Chueca P. Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell). Crop Protection, 2011; 30(6): 693–697.

Stelter M, Brenn G, Durst F. The influence of viscoelastic fluid properties on spray formation from flat-fan and pressure-swirl atomizers. Atomization & Sprays, 2002; 12(1-3): 299–327.

Miller E, Gibson B, McWilliams E, Rothstein J P. Collision of viscoelastic jets and the formation of fluid webs. Applied Physics Letters 87, 2005; 014101–1.

Brenn G, Liu ZB, Durst F. Three-dimensional temporal instability of non-Newtonian liquid sheets. Atomization & Sprays, 2001; 11(1): 49–84.

Psomas S K, Liakopoulou-Kyriakides M, Kyriakidis D A. Optimization study of xanthan gum production using response surface methodology. Biochemical Engineering Journal, 2007; 35(3): 273–280.

Katzbauer B. Properties and applications of xanthan gum. Polymer Degradation & Stability, 1998; 59(1-3): 81–84.

Cloeter M D, Qin K, Patil P. Planar laser induced fluorescence (PLIF) flow visualization applied to agricultural spray nozzles with sheet disintegration; Influence of an oil-in-water emulsion. ILASS-Americas 22nd Annual Conf. on Liquid Atomization and Spray Systems. Cincinnati, USA, 2010.

Zisman W A. Relation of the equilibrium contact angle to liquid and solid constitution. Advances in Chemistry, 2008; 43: 1–51.

Yuan H, Qi S, Yang D B. Study on the point of run-off and the maximum retention of spray liquid on crop leaves. Chinese Journal of Pesticide Science, 2000; 2(4): 66–71. (in Chinese)

Stainier C, Destain M F, Schiffers B. Effect of the entrained air and initial droplet velocity on the release height parameter of a Gaussian spray drift model. Commun Agric Appl Biol Sci, 2006; 71(2 Pt A): 197–200.

Xie C, He X, Song J. Comparative research of two kinds of flat fan nozzle atomization process. Transactions of the CSAE, 2013; 29(5): 25–30. (in Chinese)




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