Fitorremediação de solos contaminados com arsênio (As) utilizando braquiária

Araújo, Alessandra Silveira Antunes; Guilherme, Luiz Roberto Guimarães; Lopes, Gertrudes Teixeira; Campos, Mari Lucia

doi:10.1590/s1413-70542011000100010

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…Araújo et al (2011) evaluated the phytoextraction potential of As by B. decumbens growing under six different types of soil and concluded that this species cannot be considered an As phytoextractor. According to Araújo et al (2011) B. decumbens can be considered a tolerant species since this species tends to concentrate the As content mostly in roots.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of metal accumulation in the forage grass Brachiaria decumbens Stapf grown in contaminated soils with iron tailings

Ferreira

Gaião

Kozovits

et al. 2021

Integr Envir Assess & Manag

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The biggest world tailing dam rupture occurred in Brazil in 2015, releasing approximately 32 million m3 of iron tailings in the Doce River watershed, along its 660 km trajectory, reaching the Atlantic Ocean. This disaster significantly altered water and soil properties, increasing the soil metal contents, mainly iron concentration. Little is known about the concentration of toxic elements in plants grown in these areas. Brachiaria decumbens stands out as the most cultivated grass in the affected areas and is widely used for cattle grazing. This study verified the metal contents in soils and in samples of B. decumbens grown in the initial pathway of the debris flow. It was noted that the tailing deposition altered the substrate chemically, increasing Fe by 181% and reducing Zn soil contents by 188%. However, the metal contents in the forage grass were below the toxic limit for cattle feed. In addition, the results suggest that the natural geological characteristics of the region also influenced the metal contents in plants since those plants grown in nonaffected areas also showed high metal concentrations. The impacted area soils had a slightly basic pH, which can reduce the metal availability. Considering that, in the future, these soils would return to their natural acid state, the metal contents in plants grown in the affected regions could probably increase. Thus, long‐term studies are needed to ensure the food safety of the forage production in these areas. Integr Environ Assess Manag 2022;18:528–538. © 2021 SETAC

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Section: Discussionmentioning

confidence: 99%

Evaluation of metal accumulation in the forage grass Brachiaria decumbens Stapf grown in contaminated soils with iron tailings

Ferreira

Gaião

Kozovits

et al. 2021

Integr Envir Assess & Manag

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“…Each pot was fertilized with 1g of N, P, K fertilizer (08-20-10), and six Brachiaria decumbens seeds (Figueiredo et al 2013) were planted at a depth of 2cm. Plants were allowed to grow in a greenhouse with daily watering for three months (Araújo et al 2011). After development, each pot was again fertilized with 1g of N, P, K (20-05-20), and the B. decumbens leaves were pruned at the height of 40cm off the ground.…”

Section: ( )mentioning

confidence: 99%

Biocidal potential of Eugenia pyriformis essential oil in the control of Rhipicephalus (Boophilus) microplus in the free-living cycle

et al. 2019

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Brazil has one of the largest commercial cattle herds in the world, which naturally coexist with an enormous number of parasitic species. Southern cattle tick, Rhipicephalus (Boophilus) microplus, is among these species, interfering with animal productivity and causing losses to the beef and dairy cattle sector. The use of chemical acaricides in the control of this mite has resulted in the emergence of resistant populations. In this sense, alternative control measures using plants as sources of botanical acaricides have shown to be effective. Eugenia pyriformis Cambess is a Brazilian plant with antioxidant and antimicrobial activity; however, there are no reports on its acaricidal activity in the literature. The present study aimed to evaluate the acaricidal and larvicidal potential of E. pyriformis leaf essential oil (EO) on southern cattle tick at different stages of the reproductive cycle. E. pyriformis leaves were collected and dried, and had their EO extracted by hydrodistillation (3h) using a modified Clevenger apparatus. Chemical analysis was performed by gas chromatography coupled with mass spectrometry (GC/MS), and 32 compounds belonging to the sesquiterpene class were identified: hydrocarbons (17.98%) and oxygenated forms (81.96%), with spathulenol (43.65%) and caryophyllene oxide (12.17%) as the most common. The EO was evaluated by the Adult Immersion Test at the concentrations (500.00 to 3.12mg/mL) in which the following parameters were measured: mortality of females (%), hatchability of eggs (%), and product efficiency (%). Larvae were assessed by the Larval Packet Test at concentrations ranging from 25.00 to 0.00004mg/mL. Lethal concentrations (LC) required for killing 50 and 99.9% of adult females and larvae were determined using Probit analysis. LC50 and LC99.9 of EO were 0.06 and 24.60mg/mL and 1,208.80 and 2,538mg/mL for larvae and adult females, respectively. Action of the EO in the free-living cycle of R. (B.) microplus larvae was another parameter assessed. To this end, the larvae were deposited in pots containing Brachiaria decumbens and, after migration to the leaf apex, a solution containing LC99.9 (24.60mg/mL) of the EO was sprayed. After 24h, 72.25% of the larvae had died, indicating stability of the EO when subjected to uncontrolled temperature and humidity conditions. The mechanism of action through which the EO killed the larvae and adult females was investigated by the Bioautographic Method, which showed inhibition of 3.15mg/mL of the EO on the acetylcholinesterase (AChE) enzyme. The results found in the present experiment indicate that E. pyriformis essential oil is an alternative in the control of southern cattle tick in the larval (parasitic) and free-living cycle (non-parasitic) stages under field conditions.

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“…Apesar disso, Araújo et al (2011) relatam que as plantas com fatores menores que um, apresentam tolerância aos elementos metálicos, como o Cu.…”

Section: Relação Das Concentrações De Cu Na Parte Aérea E Nos Tubércuunclassified

Consumo Hídrico De Calla Lily Submetida Ao Manejo De Irrigação via Solo E Teores De Cobre1

Menegaes

Swarowsky

Backes

et al. 2017

R_I

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RESUMONa floricultura as interações do sistema solo-planta-água refletem, diretamente, na qualidade do produto final, em que a compreensão destas relações auxilia no entendimento dos mecanismos de resposta da planta. Com o presente trabalho objetivou-se avaliar o desenvolvimento e o consumo hídrico da calla lily (Zantedeschia spp.) submetida a diferentes manejos de irrigação e teores de Cu (cobre), sendo cultivada em solo de áreas vitivinícolas com excesso desse nutriente. O delineamento experimental foi inteiramente casualizado, em esquema fatorial 4x3 (teores de Cu: zero, 300, 500 e 700 mg kg -1 de CuSO4 e manejo de irrigação: 40, 60 e 80% da capacidade de retenção de água no vaso (CRA)), com cinco repetições. O balanço hídrico foi realizado em intervalo de três dias e, o solo utilizado foi coletado no município de Pinto Bandeira, RS, localizado na Serra Gaúcha, em área vitivinícola. O experimento foi realizado no período de outubro de 2013 a março de 2014, em casa de vegetação, em Santa Maria, RS. Verificou-se que os teores do Cu adicionados ao solo não interferiram no consumo hídrico diário da calla lily, obtendo médias diárias de 0,5, 0,8 e 1,2 mm dia -1 para as lâminas de 40, 60 e 80% da CRA, respectivamente. Calla lily pode ser cultivada em ambientes com altos teores de Cu, pois a planta apresenta tolerância ao mesmo.

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Fitorremediação de solos contaminados com arsênio (As) utilizando braquiária

Cited by 14 publications

References 23 publications

Evaluation of metal accumulation in the forage grass Brachiaria decumbens Stapf grown in contaminated soils with iron tailings

Evaluation of metal accumulation in the forage grass Brachiaria decumbens Stapf grown in contaminated soils with iron tailings

Biocidal potential of Eugenia pyriformis essential oil in the control of Rhipicephalus (Boophilus) microplus in the free-living cycle

Consumo Hídrico De Calla Lily Submetida Ao Manejo De Irrigação via Solo E Teores De Cobre1

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