The Enhanced Carbamate Adsorption of Modified Bentonite with Coscinium fenestratum

Abstract

Abstract-Pesticides daily pollutes soil and water in farmland and environment in ASEAN agricultural developing countries. In this study, pesticide adsorption was studied by bentonite modification, targeting the "organoclay" adsorbent in comparison to native bentonite, which was probably reported to adsorb agricultural pesticide. Commercial bentonite was modified with the berberine containing natural extract from Coscinium fenestratum; the local folk medicine in Thailand. The modified clay by extracted berberine was able to adsorb carbamate pesticide carbaryl with significant rate. HPLC analysis of residue carbaryl after adsorption process showed that it was up to 80% carbaryl adsorption when bentonite was modified by extracted berberine with ratio 1:100 (w/w), whereas commercial bentonite has showed at 70%. Modified bentonite by C. fenestratum extract and berberine revealed by scanning electron microscopy showed that the different transform levels of this clay surface, herein, the highest carbaryl adsorption occurred when berberine/bentonite ratio for modification process was 1/200 (w/w). SEM results also demonstrated that the amount of berberine should be taken into consideration in term of bentonite modification for pesticide adsorption. Coscinium fenestratum plant will be further studied for its contribution to pesticide adsorption material in Thailand.

Acid activation of bentonite clay for recycled automotive oil purification

“…https://doi.org/10.1051/e3sconf/202019103002 aromatic content that indicates if there is fuel present in the UMO. Thus, after the adsorption using the activated clays S40% and MIX40%, the intensity of the UMO bands decrease, this confirm that clays are efficient [13,21]. Table 1 details the results obtained in the UV-Vis analysis and the efficiency in batch adsorption process.…”

“…[6]. In wastewater treatments, activated clay has shown to be efficient in the removal of heavy metals, pesticides, and other hazardous contaminants [11][12][13]. In the oil recycling process, the use of activated bentonite has additional advantages such as reducing the residual sludge volume and the oil loss in the sludge [9].…”

A review on the adsorption of diuron, carbaryl, and alachlor using natural and activated clays

“…Tha‐in et al (2013) investigated the ability of modified bentonite with berberine (C 20 H 18 NO 4 ) + , contained in the natural extract of Coscinium fenestratum, to adsorb carbaryl. High‐performance liquid chromatography (HPLC) analysis of residue carbaryl after the adsorption process showed up to 80% carbaryl adsorption when bentonite was modified by extracted berberine, while commercial bentonite showed a 70% adsorption capacity.…”

Facile fabrication of organobentonite–carboxymethyl chitosan hybrid film that absorbs organophosphate insecticides

“…BBr-bentonite-CMCh and Na-bentonite-CMCh films (insets in figure 4e and c, respectively) were intensively used for filtration to remove 5 ppm OP insecticides from spiked water samples. This work was carried out based on our previous and selected reports elsewhere about: (i) the diverse absorptivity of bentonite to various OP insecticides [6,7,9,[38][39][40][41]; (ii) the large water solubility of CMCh over a wide range of pH from 4 to11 and temperature from 10 to 50 • C, which is not influenced by ionic strength in aqueous solution [42,43]; (iii) the non-toxic nature of both bentonite and CMCh material to humans and the environment [19,34,44,45]. Apparently, the BBr-bentonite-CMCh film could absorb OP insecticides in water.…”

“…Bentonite clay and carboxymethyl chitosan (CMCh) products are now commercialized world-wide and studied variously for environmental application. Bentonite is a well-known material for the development of environment clean-up techniques by its absorptivity for diverse materials from heavy-metal toxins, e.g., As (III), Cd (II), Cu (II, III), Ni (II) and Pb (II) [1][2][3][4][5], to agricultural herbicides and insecticides, e.g., atrazine, carbaryl, dichlovos, parathion, paraoxon [6][7][8][9], and hazardous polycyclic aromatic hydrocarbons, e.g. naphthalene, flouranthene, benzo[a]pyrene and benzo[a]anthracene [10,11].…”