Influence of dissolved organic matter on sorption of 2, 4-dichlorophenoxyacetic acid in ferralsol
WU Dong-ming1,2, REN Chang-qi3, LI Qin-fen1,2, WU Chun-yuan1,2, LI Wei1,2
1. Institute of Environment and Plant Protection, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; 2. Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Danzhou 571737, China; 3. Academy of Tropical agriculture and forestry, Hainan University, Haikou 570228, China
Abstract：In this study,the sorption kinetics and isotherms of 2,4-dichlorophenoxyacetic acid (2,4-D) in three ferralsols were investigated,and the effect of dissolved organic matters (DOMs) was compared.The results showed that the sorption kinetics of 2,4-D in ferralsols followed Pseudo first-order equation,and the isotherm data were fitted well by Henry and Freundlich model,indicated that 2,4-D sorption on the ferralsols was an spontaneous,exothermic and anisotropic process dominated by physical forces.The value of Kd for 2,4-D ranged from 0.61 to 2.02 L/kg,implying that 2,4-D was difficult to be sorbed by the soils,which could result environmental risk to the groundwater.The sorption of 2,4-D in the ferralsol was significantly affected by the soil pH values,and was also closely related to the content of mineral and clay.Moreover,in the presence of dissolved organic matter,DOM with high hydrophobicity (CC) and DOM with medium hydrophobicity (SPd) inhibited 2,4-D sorption on the three ferralsols,causing the Kd values decreased by 10.7%~58.8%.Conversely,there was no significant effect by DOM with low hydrophobicity (RS).The influence of DOM on the sorption of 2,4-D in ferralsols were closely associated with both characteristics of DOM and soil.The effect of soil pore blocking increased with the increase of the soil mineral components and the clay contents.Meanwhile,with the increase of the hydrophobicity of DOM,the effect of solubility enhancement and pore blocking increased,which decreased the 2,4-D sorption in the ferralsols.The hydrophobiv acid fraction (HOA) and hydrophobic neutral fraction (HON) were the key fractions for this process.
USEPA. Pesticides industry sales and usage, 2008 and 2012 market estimates[EB/OL]. https://www.epa.gov/pesticides/pesticides-industry-sales-and-usage-2008-2012-market-estimates.
[2]
Salman J M, Hameed B H. Sorption of 2,4-dichlorophenoxyacetic acid and carbofuran pesticides onto granular activated carbon[J]. Desalination, 2010,256(1-3):129-135.
[3]
Paszko T, Muszyński P, Materska M, et al. Sorption and degradation of phenoxyalkanoic acid herbicides in soils:A review[J]. Environmental Toxicology & Chemistry, 2016,35(2):271-286.
[4]
Njoku V O, Islam M A, Asif M, et al. Sorption of 2,4-dichlorophenoxyacetic acid by mesoporous activated carbon prepared from H3PO4-activated langsat empty fruit bunch[J]. Journal of Environmental Management, 2015,154:138-144.
[5]
Kamaraj R, Davidson D J, Sozhan G, et al. Sorption of 2,4-dichlorophenoxyacetic acid (2,4-D) from water by in situ, generated metal hydroxides using sacrificial anodes[J]. Journal of the Taiwan Institute of Chemical Engineers, 2014,45(6):2943-2949.
Gaultier J, Farenhorst A, Sung M K, et al. Sorption-desorption of 2, 4-dichlorophenoxyacetic acid by wetland sediments[J]. The Society of Wetland Scientists, 2009,29(3):837-844.
[9]
Cox L, Cecchi A, Celis R, et al. Effect of Exogenous Carbon on Movement of Simazine and 2,4-D in Soils[J]. Soil Science Society of America Journal, 2001,65(6):1688-1695.
[10]
Florescéspedes F, Fernándezpérez M, Villafrancasánchez M, et al. Cosorption study of organic pollutants and dissolved organic matter in a soil[J]. Environmental Pollution, 2006,142(3):449-456.
Li Y L, He W, Liu W X, et al. Influences of binding to dissolved organic matter on hydrophobic organic compounds in a multi-contaminant system:Coefficients, mechanisms and ecological risks[J]. Environmental Pollution, 2015,206:461.
Cabrera A, Cox L, Spokas K A, et al. Comparative sorption and leaching study of the herbicides fluometuron and MCPA in a soil amended with biochar and other sorbents[J]. Journal of Agricultural and Food Chemistry, 2011:1-36.
[16]
Baskaran S, Bolan N S, Rahman A, et al. Effect of exogenous carbon on the sorption and movement of atrazine and 2,4-D by soils[J]. Australian Journal of Soil Research, 1996,34(4):609-622.
[17]
Li K, Xing B, Torello W A. Effect of organic fertilizers derived dissolved organic matter on pesticide sorption and leaching[J]. Environmental Pollution, 2005,134(2):187-194.
[18]
Hiller E, Tatarková V, Šimonovi?ová A, et al. Sorption, desorption, and degradation of (4-chloro-2-methylphenoxy) acetic acid in representative soils of the Danubian Lowland, Slovakia[J]. Chemosphere, 2012,87(5):437-444.
[19]
Spark K M, Swift R S. Effect of soil composition and dissolved organic matter on pesticide sorption[J]. Science of the Total Environment, 2002,298(1-3):147-161.
Wu H H, Lin Y Y, Wu J Y, et al. Surface Sorption of Iron Oxide Minerals for Phenol and Dissolved Organic Matter[J]. Earth Science Frontiers, 2008,15(6):133-141.
Gondar D, López R, Antelo J, et al. Sorption of paraquat on soil organic matter:effect of exchangeable cations and dissolved organic carbon[J]. Journal of Hazardous Materials, 2012,235-236(2):218-223.
Drori Y, Aizenshtat Z, Chefetz B. Sorption-Desorption Behavior of Atrazine in Soils Irrigated with Reclaimed Wastewater[J]. Soil Science Society of America Journal, 2005,69(6):1703-1710.
[28]
Kaiser K, Guggenberger G, Derenne S, et al. The role of DOM sorption to mineral surfaces in the preservation of organic matter in soils[J]. Organic Geochemistry, 2000,31(7):711-725.
[29]
Barriuso E, Baer U, Calvet R. Dissolved Organic Matter and Sorption-Desorption of Dimefuron, Atrazine, and Carbetamide by Soils[J]. Journal of Environmental Quality, 1992,21(3):359-367.
[30]
Lerman I, Chen Y, Xing B, et al. Sorption of carbamazepine by carbon nanotubes:Effects of DOM introduction and competition with phenanthrene and bisphenol A[J]. Environmental Pollution, 2013,182(6):169-176.
[31]
Chiou C T, Malcolm R L, Brinton T I, et al. Water solubility enhancement of some organic pollutants and pesticides by dissolved humic and fulvic acids[J]. Environmental Science & Technology, 1986,20(5):502-508.
[32]
Kawahigashi M, Kaiser K, Rodionov A, et al. Sorption of dissolved organic matter by mineral soils of the Siberian forest tundra[J]. Global Change Biology, 2006,12(10):1868-1877.
[33]
Oren A, Chefetz B. Sorptive and Desorptive Fractionation of Dissolved Organic Matter by Mineral Soil Matrices[J]. Journal of Environmental Quality, 2012,41(2):526-533.
Zhou J, Chen H, Huang W. Effects of rice straw-derived dissolved organic matter on pyrene sorption by soil[J]. Environmental Toxicology and Chemistry, 2010,29(9):1967-1975.
[36]
Plazinski W, Rudzinski W, Plazinska A. Theoretical Models of Sorption Kinetics Including a Surface Reaction Mechanism:A Review[J]. Advances in Colloid and Interface Science, 2009,152(1/2):2-13.
