15 documents found, page 1 of 2

A dispersive solid phase extraction-based method for chromium(vi) analysis usin...

Biochar from carrot residues chemically modified with magnesium for removing ph...

Determination of chromium (VI) by dispersive solid-phase extraction using disso...

Film based on magnesium impregnated biochar/cellulose acetate for phosphorus ad...

Phosphorus (P) is a nutrient necessary for agricultural production and a potential originator for eutrophication in water bodies, resulting in qualitative changes; it may also affect the aquatic ecosystem and human health. In addition, as a finite resource, the importance of studying strategies to remove it from water is evident, thus making possible its recycling. Many studies have used powdered materials, inc...

Layered double hydroxides: matrices for storage and source of boron for plant g...

The increase of the absorption efficiency of boron (B) by plants is essential for increasing crop productivity. The intercalation of B in MgAl layered double hydroxides (LDHs) is an alternative to evaluating how these materials can provide B to plants. In this work, a MgAl LDH intercalated with borate ions (Mg2Al-B-LDH) was synthesized by the constant pH coprecipitation method, and the material produced was eva...

Difenoconazole and linuron dissipation kinetics in carrots under open-field con...

The dissipation of difenoconazole and linuron using an open-field experimental approach with carrots exposed to one-, two- and fivefold the recommended dose of the pesticides was evaluated to provide safe recommendation to ensure food safety of carrots. The pesticide residue analysis was performed with solid-liquid extraction with low temperature partitioning technique (SLE/LTP) followed by gas chromatography a...

Qualidade de sementes de soja encapsuladas com alginato de sódio

O objetivo deste trabalho foi avaliar a eficiência do alginato de sódio na qualidade de sementes de soja em dois substratos, papel germitest® e areia. As sementes de soja encapsuladas com o alginato de sódio foram avaliadas por meio dos seguintes testes: germinação, primeira contagem de germinação, comprimento parte aérea e raiz de plântulas, massa de plântulas, índice de velocidade de germinação e emergência, ...

Ozone treatment for pesticide removal from carrots: Optimization by response su...

The present study aimed to optimize ozone (O3) treatments, as gas and dissolved in water, to remove difenoconazole and linuron in carrots. We employed a central composite design to study three variables governing the efficacy of treatments: O3 concentration, temperature and treatment time. The temperature did not influence the efficacy of treatments. The removal percentage of pesticides increases with increases...

Mesoporous carbon derived from a biopolymer and a clay: preparation, characteri...

The production of carbon-based materials is a field of intense scientific research due to the diversity of potential applications that this kind of material presents. In this paper, it is reported the synthesis of porous carbonaceous material (PCM) based on the pyrolysis at 850 °C of a composite made of Laponite (commercially available synthetic clay) and Cassava starch, followed by clay removal through acid di...

Determination of Haloxyfop-Methyl, Linuron, and Procymidone pesticides in carro...

This study aimed to optimize and validate an analytical method for extraction, detection, and quantification of haloxyfop-methyl, procymidone, and linuron pesticides in carrot samples using solid–liquid extraction methods and low temperature partition (SLE-LTP), accompanied by gas chromatography coupled to mass spectrometry (GC-MS). For SLE-LTP technical optimization, we utilized a complete factorial planning, ...