+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Concurrent patterns of sorption-degradation for oryzalin and degradates

, : Concurrent patterns of sorption-degradation for oryzalin and degradates. Journal of Agricultural & Food Chemistry 46(8): 3292-3299, Aug

Sorption and degradation are linked, dynamic processes which largely govern the potential for herbicides and their degradation products to reach groundwater. Patterns of concurrent degradation and sorption of the dinitroaniline herbicide oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) and its degradates were determined on four soils representative of typical use areas. Radiolabeled oryzalin was applied to soil at either 1.64 or 3.14 mug/g and incubated at 25degree C under aerobic conditions for up to 6 months. The time required for 50% and 90% degradation of oryzalin ranged from 24 to 42 and 79 to 140 days, respectively. The radiocarbon was rapidly incorporated into the soil organic matter; up to 57% of the applied radiocarbon was recalcitrant to extraction after 6 months. The degradation pathway deduced is similar to that for the related dinitroaniline herbicide trifluralin. Apparent distribution coefficients were measured separately for the pool of material in the soil solution (Kss, determined from a 5-min desorption) and the total desorbable pool of material (Kd, determined from a 24-h desorption). Sorption coefficients increased by a factor of 3 over 6 months, indicating that the total pool of extractable oryzalin became less available for desorption and degradation. Values of Kss remained constant over time, indicating that material in the soil solution and the desorbable pool were in equilibrium. The amount of oryzalin and degradates in soil solution was a function of the desorption energy from the surface and was not limited by solubility. Similar, though less consistent, trends were observed for oryzalin degradation products.


DOI: 10.1021/jf980289s

Other references

Nichols, G.R.; Davis, G.J.; Lefkowitz, J.B., 1989: Sudden death due to fibromuscular dysplasia of the sinoatrial nodal artery. A case of sudden death is reported in a previously healthy 28-year-old female. No gross abnormalities of the heart or other organ systems were identified at autopsy. Routine microscopic sections of heart were unremarkable; however, sections of the...

Gao Ruiji; Tang Tianfu; Xue Yaosong, 1988: The connection of the upper Precambrian in N. China with the Sinian System in S. China. The Upper Precambrian in the Democratic People's Republic of Korea was investigated by the authors in 1985. It is divided into two parts, i.e. the Juxian Group and the Xiangyuan System. The Juxian group which overlies unconformably the rock s...

Bagirov, R.B., 1965: Anatomical study of Coronilla hyrcana Prilipko. Farmatsevtychnyi Zhurnal 20(4): 33-37

Sandroni, C.; Cavallaro, F.; Callaway, C.W.; D'Arrigo, S.; Sanna, T.; Kuiper, M.A.; Biancone, M.; Della Marca, G.; Farcomeni, A.; Nolan, J.P., 2014: Predictors of poor neurological outcome in adult comatose survivors of cardiac arrest: a systematic review and meta-analysis. Part 2: Patients treated with therapeutic hypothermia. To systematically review the accuracy of early (≤7 days) predictors of poor outcome, defined as death or vegetative state (Cerebral Performance Categories [CPC] 4-5) or death, vegetative state or severe disability (CPC 3-5), in comatose adult su...

Carluccio, S.; Delbue, S.; Signorini, L.; Setola, E.; Bagliani, A.; Della Valle, A.; Galli, A.; Ferrante, P.; Bregni, M., 2015: Generation of tumor-specific cytotoxic T-lymphocytes from the peripheral blood of colorectal cancer patients for adoptive T-cell transfer. This study designs a strategy for an adoptive cellular therapy (ACT) protocol based on the ex-vivo selection of autologous peripheral blood-derived CD8-enriched T-cells, stimulated with dendritic cells (DCs) that had been pulsed with apoptotic tum...

McKENDRICK.J.G., 1901: La matiere vivante. Revue Scientifique, XVI 609-612

Ahmad, I.; Gibson, P.R., 2006: Management of iron deficiency in patients admitted to hospital: time for a rethink of treatment principles. Background: Iron deficiency is very common in patients admitted to hospital. Its management is changing with new insights into iron absorption and therapeutic options. Aims: The aims of this study were to develop guidelines for the correction of i...

Fuster, R.García.; Argudo, Jé.A.Montero.; Albarova, O.Gil.; Sos, F.Hornero.; López, S.Cánovas.; Codoñer, Mía.Bueno.; Miñano, Jé.A.Buendía.; Albarran, I.Rodríguez., 2005: Prognostic value of chronic obstructive pulmonary disease in coronary artery bypass grafting. Coronary and chronic lung diseases have become a common association. This comorbidity has been generically considered by most of the operative risk scores, but its functional severity has seldom been addressed by these models. Our objective was to...

Shonka, J.J.; Debord, D.M.; Bennett, T.E.; Weismann, J.J.; Logan, R.J., 1996: An imaging contamination monitoring system for surfaces. Health Physics 70(6 SUPPL ): S28

Fargasova, A., 2001: Effect of Cd in combination with Cu, Zn, Pb and Fe on root prolongation and metal accumulation in the roots and cotyledons of mustard (Sinapis alba) seedlings. S. alba seeds were germinated on filter paper in Petri dishes containing 50 ml of tap water and added metal compounds for 8 days at 23 +or-1 degrees C shielded from direct sunlight. The following metals were used, at concentrations equal to the pr...