Adsorption of Herbicide Diuron in Pineapple-Growing Soils of Eastern Thailand

Abstract

Nowadays, social direction focuses on natural and organic farming, which bans or restricts the use of pesticides. However, chemicals such as herbicides and insecticides are still importantly essential in crop and livestock productions-particularly in the tropics, where severe outbreaks of weeds and pests are common and threaten the loss of such productions. Diuron (N-(3,4-dichlorophenyl)-N, N-dimethylurea) is the main systemic phenyl urea herbicide which inhibits the photosynthesis at PS II of plants [1-2]. Diuron formulation is usually in wettable powder (WP) and suspension concentration (SC). It is a broad-spectrum residual herbicide registered for pre-emergence and post-emergence to control of both broadleaf and annual grassy weed [3]. The application of diuron has been directed moderately persistently in agricultural soil and water, air, organisms and other environments [4-7]. It could result in soil and water pollution and other ecological problems. For its toxicity, diuron is slightly toxic to mammals and birds, moderately toxic to aquatic invertebrates and exerts

Cover Crop Straw Interferes in the Retention and Availability of Diclosulam and Diuron in the Environment

“…Diuron is a non-ionic herbicide that shows high retention in soil and high affinity for organic matter via hydrophobic interactions [53], justifying the higher affinity for straw compared to diclosulam (Figure 1). In general, the sorption of diuron is greater in soils with higher organic matter content [54]. The partitioning of diuron at the soil/solution interface (Kd sorption) varies depending on the soil types in which the diuron is applied.…”

Sorption and Desorption of Tire Rubber and Roadway-Derived Organic Contaminants in Soils and a Representative Engineered Geomedium

“…Although many previous studies have reported sorption outcomes for diverse organic compounds, − few studies have focused on emerging stormwater and roadway-derived contaminants despite their ubiquity and sometimes high concentrations. ,− Also, the high concentrations (e.g., milligrams per liter) frequently used to facilitate analytical detection in laboratory studies ,, often substantially exceed environmental concentrations. To address these data gaps, we investigated the sorption–desorption characteristics of ≤11 stormwater-derived contaminants.…”

Comportamento de herbicidas pré-emergentes em palhadas de diferentes plantas de cobertura

“…O diuron é um herbicida não-iônico que apresenta alta retenção no solo e alta afinidade pela matéria orgânica por interações hidrofóbicas Karickhoff, 1990) o que justifica a maior afinidade pela palhada que o diclosulam (Figura 3.3). De maneira geral, a sorção do diuron é maior em solos com maiores teores de matéria orgânica (Tantarawongsa;Ketrot, 2020). A partição do diuron na interface solo/solução (Kdsorção) varia em função dos tipos de solos em que o diuron é aplicado.…”