Adsorption of Pesticides and Their Biodegraded Products on Clay Minerals and Soils.

Fushiwaki, Yuichi; Urano, Kohei

doi:10.1248/jhs.47.429

Cited by 52 publications

(26 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The toxicity, potential bioaccumulation, and non-biodegradability of these compounds represent risks to the environment, especially for human health [1]. Since most pesticides are used in open environment such as ploughed fields, their residues have become one of the major diffuse pollution risks to the world drinking water supplies [2][3][4]. Various studies have reported the contamination of water resources by these chemicals, even at considerable distances from the point of original application [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Özcan

Tor

Aydın

2011

CLEAN Soil Air Water

View full text Add to dashboard Cite

This work describes the potential usability of neutralized red mud for the removal of organochlorine pesticides (OCPs) from aqueous solutions. After examination on the adsorption capability of neutralized red mud for all studied OCPs, the experiments were performed by employing aldrin as a model compound. The effect of several parameters, such as contact time, pH of the solution, initial aldrin concentration, and dosage of the adsorbent was evaluated by batch experiments. The determination of OCPs was carried out using traditional liquid-liquid extraction followed by a GC coupled with m-electron capture detector (GC-mECD). The results showed that adsorption equilibrium time depended upon the initial aldrin concentration and adsorption followed the second-order kinetic model. Kinetic study also indicated that the film diffusion mechanism was a main rate control mechanism. The removal was explained by considering the electrostatic interactions between metal oxides surface of the neutralized red mud and inductively charged centers (negative charge (dÀ) of chlorine atoms and positive charge (dþ) of p-cloud aromatic ring) of the aldrin molecules. In comparison to the Langmuir isotherm model, the Freundlich model better represented the adsorption data. The neutralized red mud was also succesfully employed for the removal of OCPs from real water samples, including tap water and surface (lake) water, fortified with studied OCPs.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Özcan

Tor

Aydın

2011

CLEAN Soil Air Water

View full text Add to dashboard Cite

show abstract

“…An inverse relationship has been often identified between the adsorption ratio of the pesticide on soil or sediment and the water solubility. [3,6,11] However, in this study, the K f value of simetryn was relatively higher despite simetryn having the highest water solubility among the herbicides studied (Table 1). There was no significant relationship between the K f values and the water solubility of the herbicides in this study.…”

Section: Adsorption and Desorption Isothermsmentioning

confidence: 51%

Adsorption and desorption characteristics of several herbicides on sediment

Kawakami

Eun

Ishizaka

et al. 2007

Journal of Environmental Science and Health, Part B

View full text Add to dashboard Cite

The objective of this study was to clarify the adsorption and desorption characteristics of several herbicides in sediment. Five herbicides, esprocarb, thiobencarb, dimethametryn, pretilachlor, and simetryn were examined in this study. The adsorption ratio on the sediment increased in the following order: pretilachlor < dimethametryn < simetryn < thiobencarb < esprocarb. On the other hand, the adsorption ratio on the sediment without organic matter increased in the following order: thiobencarb < esprocarb < pretilachlor < dimethametryn < simetryn. Furthermore, the amounts of simetryn, dimethametryn, and pretilachlor adsorbed on the sediment without organic matter increased, while those of esprocarb and thiobencarb decreased in comparison to the original sediment. These results strongly suggested that the mineral surface in the sediment was very important as the adsorption site for the herbicide, especially in the case of simetryn, dimethametryn, and pretilachlor. All the adsorption and desorption data fitted well with the Freundlich equation. The hysteresis in the adsorption-desorption phenomena in the sediment was observed for all the herbicides, and it was affected by the organic matter in sediment, especially in the case of dimethametryn and pretilachlor.

show abstract

“…The investigation was made initially on the undifferentiated individual samples and then on their clayey fraction alone. Indeed, this fraction is the one which has the most influence on migration of the investigated components into the subsoil, given their high interaction capability (Fushiwaki and Urano 2001;Sheng et al 2002;Li et al 2003). The mineralogical analysis of the clayey fraction consisted of two sequential steps: the first, in which the diffractometric spectrum of the iso-oriented clayey fraction was obtained, and the second, in which the analysis was repeated after treating the samples with ethylene glycol (glycolysis) (Moore and Reynolds 1989).…”

Section: Chemicals and Hplc Equipmentmentioning

confidence: 99%

“…Given its high capability of ion exchange (Moore and Reynolds 1989), montmorillonite has a high capability of adsorbing organic cations, as reported in various studies (Sanchez-Martin et al 2006;Angio et al 2005;Fushiwaki and Urano 2001). As a result, the occurrence of montmorillonite plays a key role in vulnerability studies.…”

Section: Soil Samplingmentioning

confidence: 99%

Influence of surface/groundwater interaction on pollution by pesticides in farmlands of the Fucino Plain, central Italy

et al. 2009

View full text Add to dashboard Cite

This paper analyses flow and transport of pesticides from the unsaturated zone to groundwater so as to predict concentration of those contaminants in the Fucino Plain's groundwater, by site investigations and numerical simulations. Pesticides were detected in surface water (peaks of 13 mu g L(-1)) and groundwater (peaks of 0.37 mu g L(-1)). Modelling tools made it possible to identify that pattern of precipitation, organic matter content, and root thickness are the key factors involved in vertical seepage of pesticides. Numerical simulations indicated that a significant fraction of contaminants is leached from the most surficial soil layers through runoff, while only a secondary fraction is mobilised towards groundwater. Likelihood of contaminating deep groundwater is fairly low, whereas surface waters show higher susceptibility. Results of the proposed conceptual hydrogeological model show that pesticides are more likely to be entrained by mixing of stream water with shallow groundwater in periods of high water exploitation from shallow wells

show abstract

Adsorption of Pesticides and Their Biodegraded Products on Clay Minerals and Soils.

Cited by 52 publications

References 16 publications

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Adsorption and desorption characteristics of several herbicides on sediment

Influence of surface/groundwater interaction on pollution by pesticides in farmlands of the Fucino Plain, central Italy

Contact Info

Product

Resources

About