Academic Journal
Transformation of plant cuticles in soil: Effect on their sorptive capabilities. Soil Sci Soc
| العنوان: | Transformation of plant cuticles in soil: Effect on their sorptive capabilities. Soil Sci Soc |
|---|---|
| المؤلفون: | Keren Stimler, Baoshan Xing, Benny Chefetz |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://departments.agri.huji.ac.il/soils/chefetz/pubfile-11.pdf. |
| سنة النشر: | 2006 |
| المجموعة: | CiteSeerX |
| الوصف: | Plant cuticular materials play an important role in sorption of polar and nonpolar pollutants in soils. The objective of this study was to examine the effect of decomposition and transformation of plant cuticles on their sorption behavior with triazine herbicides and poly-cyclic aromatic hydrocarbons (PAHs). Sorption–desorption behavior was studied during 12 mo of incubation of cuticles isolated from tomato (Lycopersicon esculentum Mill.) fruits and pummelo [Citrus maxima (Burm.) Merr.] leaves in sandy soil. Sorption and desorption experiments and spectroscopic and chemical analyses were performed on the samples after 0, 1, 3, 6, and 12 mo of incubation. The de-composition of the cuticles (46–49 % after 12 mo) did not affect the organic-C-normalized Freundlich capacity coefficient (KFOC) for the PAHs. In addition, throughout the incubation period, the two PAHs exhibited linear and reversible sorption isotherms with both cuticles. The isotherms of the triazines were significantly affected by the de-composition of the cuticles from pummelo leaves, whereas only minor changes were recorded for the tomato cuticle samples. For the micro-cosm with cuticles from the pummelo leaves, the KFOC values of the triazines increased with increasing decomposition. Preferential deg-radation of pectin and cutin probably facilitated the interaction be-tween the triazines and the residual cutan and more condensed cutin moieties. Our data suggest that both cutin and cutan play important roles in the sorption of polar and highly nonpolar and aromatic com-pounds in soils; however, with decomposition, the more condensed structure of the cutin andmainly the cutan biopolymer govern sorption of the cuticle residues. SORPTION AND DESORPTION are the major processesinfluencing the fate of hydrophobic organic com-pounds (HOCs) in soils. Among the natural sorbents in the environment, soil organic matter (SOM) plays a sig-nificant role in the overall sorption of many organic compounds, even at very low levels (.0.1%). Not only the quantity, ... |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.559.6100; http://departments.agri.huji.ac.il/soils/chefetz/pubfile-11.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.559.6100 http://departments.agri.huji.ac.il/soils/chefetz/pubfile-11.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.B63AAD06 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |