Adsorption of terpenic compounds onto organo-palygorskite

Abstract

Essential oils from aromatic plants are currently mentioned as suitable tools for excellent protection of stored grains from insect pest attacks. The present work aimed to study the processes of the synthesis insecticidal formulation with clay. The active terpenic compounds of essential oil of Eucalyptus globulus (Eg) were fixed in the palygorskite by adsorption process. Two sample types of palygorskites were used: raw and organo-palygorskite. The palygorskite clays were characterized by different physicochemical techniques including X-ray diffraction (XRD), Fourier transform infrared (FTIR) analyses, thermogravimetric analysis (TG), differential thermal analysis (DTA), Brunauer-Emmet-Teller (BET), and scanning electron microscope (SEM). Results reveal that the raw clay has a fibrous structure with impurities essential calcite. These structures and physicochemical properties of raw palygorskite and organo-palygorskite give it the potential of material adsorbent. Results show that the adsorption capacity strongly depends on affinity between terpenic compounds and organic cations rather than on interlayer distance of organo-palygorskite. The highest adsorption capacity of terpenic compounds is acquired with palygorskite interlaced by didodecyldimethylammonium bromide (DDDMA). These results validated the potential utility of the Paly-DDDMA as adsorbent fibrous clay for the retention of terpenic compounds in application of environmental preservation.

Adsorption of Carvone and Limonene from Caraway essential oil onto Tunisian montmorillonite clay for pharmaceutical application

“…The correlation coefficient for the pseudo-second-order kinetic model was R 2 Carvone = 0.9986 and R 2 Limonene =0.9966 where the experimental q e,exp values agreed with the calculated q e values (Table 4) and, therefore, indicates that this model is the most suitable to the description of Carvone and Limonene adsorption by purified clay. Similar results was found in the adsorption of terpenic compounds from Eucalyptus globulus essential oil into beidellite, modified beidellite and organo-palygorskite 15,18 his result suggests the adsorption process is controlled by the surface control through chemisorption 18 .…”

Adsorption of Glyphosate by Palygorskite

“…The thermal analysis (from 25 to 1000 ºC) was carried out with run-of-mine and dressed ore samples, showing three mass loss events, related to dehydration, in the temperature ranges of 25 -180, 180 -240 and 240 -460 ºC (Figure 2 SM). The first event is attributed to loss of water adsorbed on the surface of the clay mineral (D1) 14,22,38 ; the second event is characteristic of the loss of zeolitic water present in the channels of palygorskite (D2) 22 ; and the last event is related to the structural water loss from the hydroxyl groups of palygorskite (D3) 10,22,39 . According to Cheng et al 40 , the origin of the palygorskite sample and the amount of impurities are parameters that influence the result of thermal analysis.…”

New Trends in Clay-Based Nanohybrid Applications: Essential Oil Encapsulation Strategies to Improve Their Biological Activity

“…Organically modified palygorskite and beidellite clays were explored by Ghrab et al [110,111] as support materials for Eucalyptus globulus EO-active terpenic compounds adsorption for a potential insecticidal application.…”