Photolysis Reaction of Linear Alkhylbenzene Sulphonate in Saturated Soil: Kinetics Parameters Evaluation

  • Edia Rahayuningsih Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia
  • I Made Bendiyasa Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia
  • B Radjagukguk Department of Soil Science, Gadjah Mada University, Yogyakarta, Indonesia
Keywords: fate, photolysis, methylene blue active substances, detergent of linear alkhylbenzene sulphonate, saturated soil

Abstract

Fate of detergent of linear alkhylbenzene sulphonate (LAS) in the soil can be described if the values of kinetics parameters are known. The objectives of the study were to determine the kinetics parameters of photolysis reaction of LAS in saturated soil system, to identify variables affecting the parameters, and to set-up empirical equations correlating parameter to the pertinent variables. The experimental works were performed in batch reactor which was equipped with ultraviolet of 53 or 789 lumens. One hundred grams of soil was mixed with 1000 ml of water and then the mixture was left for 24 hour in the reactor. A certain amount of LAS was then added to the soil solution and stirrer was put on, so that the LAS concentration in the mixture became 20 ppm. Before the light put on, the soil solution was analyzed its biomass content using a plate count method and LAS concentration using Methylene Blue Active Substances (MBAS) method. Subsequently the slurry were stirred and lighted continuously. At a certain time interval, 5 cubic centimeters of solution was taken from the reactor then its biomass content and LAS concentration were analyzed. The variables studied were different soil type and the light intensity. When effects of one variable studied, the other variables were kept constant.

Photolysis reaction of LAS in saturated soil took place both in soil solution and particle. The kinetics parameters are the function of soil organic matter (%OM) and clay mineral (%CM) content, as well as light intensity. The photolysis reaction rate constants of LAS in soil solution and particle for light intensity of 53 lumens are described as follows:

kPS = 3.79 x 10 -4 (%OM) + 4.41 x 10 -3 (%CM)
kPL = 7.73 x 10 -3 (%OM) + 1.18 x 10 -3 (%CM)

For the light intensity of 789 lumens, the kinetics parameters are

kPS = 16.3 x 10 -4 (%OM) + 0.075 x 10 -3 (%CM)

30 Photolysis Reaction of Linear Alkhylbenzene Sulphonate in Saturated Soil: Kinetics Parameters Evaluation

kPL = 49.3 x 10 -3 (%OM) + 1.46 x 10 -3 (%CM)
kd = 8.06 x 10 -4 (%OM) + 7.39 x 10 -5 (%CM)

References

1. Environmental Health Criteria (EHC) 169, 1996, Linear Alkylbenzene Sulfonates and Related Compounds, International Programe on Chemical Safety (IPCS) INCHEM Home.
2. Mikami Y, Nagai H, Sakai Y, Fukushima S, and Nishino T., 1969, “Effects of a Detergent on The Development of The Mouse Embryo”, Congenit Anom(Senten Ijo), 9: 230 (in Japanese).
3. Miyamoto, J., 1977, “Degradation of Fenitrothion in Terrestial and Aquatic Environments including Photolytic and Microbial Reactions”, Proceedings of a Symposium on Fenitrothion, Ottawa, National Research Council of Canada.
4. Rahayuningsih E., Bendiyasa, I.M., Radjagukguk, B., Petrus, H.T.B.M., and Permana A.D.C., 2007, “Hydrolysis reaction of linear alkhylbenzene sulphonate (LAS) in saturated soil”, Proceeding International Seminar Numerical Analysis on Engineering, Padang, Indonesia
5. Rahayuningsih, E., Tyoso, B.W., Sediawan, W.B., Supranto, dan Radjagukguk, B., 2002, “Sorption Analysis of Fenitrothion Pesticide in a Flooded Soil System”, Regional Symposium on Chemical Engineering, Kualalumpur, Malaysia.
6. Rahayuningsih,E., Tyoso,B.W, Sediawan,W.B., Supranto, dan Radjagukguk, B., 2001, “Analisis Perpindahan Massa Pestisida Organofosfor Disertai Tinjauan Peruraiannya dalam Tanah Sawah”, Disertasi S3, Universitas Gadjah Mada, Yogyakarta.
7. Schnoor, J.L., 1992, “Fate of Pesticides and Chemicals in the Environment”, John Wiley and Sons, New York.
8. Sekizawa,J. and Eto, M., 1992, “Environmental Health Criteria 133: Fenitrothion”, pp. 28- 58, Word Health Organization, Genewa.
9. Valsaraj, K.T. and Thibodeaux, L.J., 1988, “Equilibrium Adsorption of Chemical Vapors on Surface Soils, Landfills and Landfarms”, A Review, J. of Hazardous Materials, 19, 79-99.
10. Wolfe, N.L., Paris, D.F., Steen, W.C., and Baughman,G.L., 1980, “ Correlation of Microbial Degradation Rate with Chemical structure”, J. Environ. Sci., 14:1143 1144.
Published
2009-12-31
How to Cite
Rahayuningsih, E., Bendiyasa, I. M., & Radjagukguk, B. (2009). Photolysis Reaction of Linear Alkhylbenzene Sulphonate in Saturated Soil: Kinetics Parameters Evaluation. ASEAN Journal of Chemical Engineering, 9(2), 25-34. Retrieved from https://journal.ugm.ac.id/v3/AJChE/article/view/8056
Section
Articles