Influence of Olive Oil Mill Waste Amendment on Fate of Oxyfluorfen in Southern Spain Soils

Abstract

Oxyfluorfen herbicide residues have been previously reported in surface and ground water in the Guadalquivir river basin in Spain. Soil factors and processes (sorption, dissipation and leaching) influencing the potential offsite transport of oxyfluorfen to surface and ground water were characterized in laboratory experiments for two soils from Southern Spain. The influence of olive-oil mill waste amendment on the soil processes was also determined. Oxyfluorfen sorption in unamended soils was not significantly affected by soil active components (organic matter and clay fraction). However, a significant increase in soil sorption of the herbicide was observed with upon amendment. Laboratory half-life values for oxyfluorfen in unamended sandy clay loam and silty clay soils at 40% moisture content and 25°C were 29 and 19 days, respectively, and it increased by a factor of 4 upon amendment. Oxyfluorfen's mobility along soil profile increased with the amendment in leaching studies at 25°C, suggesting that dissolved organic matter of amendment can play an important role enhancing soil vertical movement of the pesticide. The increase in soil adsorption and persistence observed with olive-oil mill waste amendment can promote its losses by runoff following winter application, whereas vertical movement of oxyfluorfen can be enhanced following spring application when olive-oil mill waste amendment is also applied. Keywords

Sensitive Time-Resolved Fluorescence Immunoassay for Quantitative Determination of Oxyfluorfen in Food and Environmental Samples

“…Compared with the MRLs of oxyfluorfen are 0.02 mg/kg in Canada, and 0.01 in Food and Agriculture Organization (FAO) of the United Nations, the sensitivity of the TRFIA could meet the requirements for the detection of oxyfluorfen under an appropriate pretreatment. According to the published articles, the LOD values of ELISA, CELIA (Sheng et al, 2018 ), HPLC (Xiang et al, 2002 ), and GC (Calderon et al, 2015 ) were 4.8, 1.6, 7, and 50 ng/mL; the TRFIA were more sensitive than the above-mentioned methods.…”

“…At present, the detection method of oxyfluorfen is limited to the method of instrumental analysis [such as high-performance liquid chromatography (HPLC), gas chromatography, HPLC-MS, etc.] (Xiang et al, 2002 ; Wang et al, 2007 , 2012 ; Calderon et al, 2015 ); however, there are some problems by instrument detection, such as high consumption (the instrument is very expensive), high pollution (dosage of organic solvent, not environmentally friendly), complex operation of the program, and difficulties of realizing high-throughput detection (Bettencourt Da Silva et al, 2012 ; López-Blanco et al, 2018 ; Yang et al, 2018 ; Drabova et al, 2019 ). The immune analysis is a simple, rapid, sensitive, low-cost, high-throughput detection technology that has become one of the hotspots and development trends in the field of food and environmental products quality safety testing (Watanabe et al, 2004 ; Brian et al, 2009 ; Navarro et al, 2013 ).…”

Development of immunoassays for detecting oxyfluorfen residue in agricultural and environmental samples

“…Currently, several instrument-based methods, such as gas chromatograph (GC) 3,4 and liquid chromatography (LC) 5,6 are commonly used to detect oxyuorfen in environmental and agricultural samples. GC coupled to mass spectrometry (GC-MS) [7][8][9][10] has been the most popular method to detect the oxy-uorfen residue in recent years.…”

Electrobioremediation of Oxyfluorfen-Polluted Soil by Means of a Fixed-Bed Permeable Biological Barrier

“…Oxyfluorfen is a frequently used herbicide to control weeds. It has very low solubility in water (0.116 mg L -1 ), low vapour pressure (0.026 mPa at 25 ºC), and low biodegradability because the metabolism of this compounds by the plants is not possible, and it is only slowly assimilated by microorganisms (Sondhia, 2010;Calderón et al, 2015).…”