Remoção de atrazina e metabólitos pela filtração lenta com leito de areia e carvão ativado granular

Coelho, Edumar Ramos Cabral; Bernardo, L Di

doi:10.1590/s1413-41522012000300003

Cited by 10 publications

(8 citation statements)

References 23 publications

(9 reference statements)

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“…According to Sezerino [34], a coefficient of uniformity lower than or equal to 5 is recommended for sand. Coelho and Di Bernardo [8] obtained coefficients of uniformity equal to 2.0 and lower than 1.7 for sand and granular activated carbon, respectively. Brinck [9] obtained coefficients of uniformity equal to 1.76 and 1.97 for different sands and 1.30 and 1.96 for different anthracites.…”

Section: Physicochemical Analysis Of Rainwatermentioning

confidence: 94%

“…For double-layer and treble-layer water filters, the thickness of the sand layer should vary from 15 to 30 cm, while the anthracite layer should be 45 to 60 cm. In upward-flow water filters, the minimum thickness required for the support layer is 0.40 m [8].…”

Section: Introductionmentioning

confidence: 99%

“…The first two processes require operation below a pressure of 5 bar (equivalent to 500 KPa in the international system) and are mainly recommended for solid/liquid separation and the elimination of particles. Ultrafiltration retains mineral and organic particles as well as biological particles (algae, bacteria, and viruses), in addition to eliminating dissolved organic molecules [8].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Analysis of Granular and Membrane Filters for Rainwater Treatment

Teixeira

Ghisi

2019

Water

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The objective of this study was to compare the efficiency of rainwater treatment using two types of filters: one with filtration materials (gravel, sand, and anthracite) and the other employing membranes. In both cases, the quality of the rainwater after passing through the filter met the standards required by NBR 15527:2007 (Brazilian Association of Technical Standards (ABNT)) and the United States Environmental Protection Agency (EPA) for non-potable uses according to the parameters pH, temperature, turbidity, ammonia, nitrate, nitrite, alkalinity, and calcium hardness. The results obtained were also compared with Directive 2914/2011 of the Brazilian Ministry of Health, which deals with water potability, and with Resolution 357/2005 of CONAMA (Brazilian National Council for the Environment), which is applied to surface water bodies, especially rivers, and establishes the possibility of direct contact of the water with human skin. It was concluded that the rainwater obtained from both filters could be used for non-potable uses, such as toilet flushing, garden irrigation, and sidewalk cleaning, as well as for direct-contact activities, such as bathing and washing clothes.

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Section: Physicochemical Analysis Of Rainwatermentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative Analysis of Granular and Membrane Filters for Rainwater Treatment

Teixeira

Ghisi

2019

Water

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“…The interaction, presence, or removal of pesticides in the soil, as well as effective action for which the product is applied, are aspects influenced by different physical, chemical, and biological processes (McBride 1994;Freire et al 2004;Coelho and Bernardo 2012). These processes often occur simultaneously, resulting in the complexity of this relationship pesticide-soil (Reemtsma et al 1999;Lavorenti et al 2003;Sarwar et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Organic matter content in riparian areas of soil composed of woody vegetation and grass and its effects on pesticide adsorption

Rebello

Bortolozo

Parron

2018

Int J Recycl Org Waste Agricult

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Purpose Riparian zones are identified as mitigation areas of agricultural pollutants to river ecosystems. However, the mitigation mechanisms of these pollutants remain unclear mainly on the effects of different types of riparian vegetation and its organic matter content in the pollutants removal process. This study aims to assess the content of organic matter in soils composed of woody vegetation and grass and its effects on four pesticides adsorption. Adsorption studies were conducted in soil collected in riparian vegetation areas composed of grass and trees under the influence of an agricultural area. Methods The analyses were performed in 21 shakers containing 100 g soil and a L of water previously contaminated with pesticide that were stirred for 30, 60, 120, 240, 360, 720, and 1440 min. A study was made of maximum adsorption capacity using the time 360 min and the concentrations of 5, 20, 40, and 50 μg L −1. Results The soils of woody vegetation areas had a higher concentration of organic matter as compared with grass areas, and time 360 min achieved the highest adsorption capacity with minimum values of 84% adsorption for the area of land made up of trees and 67% for grass areas. The soils of woody vegetation areas had a higher concentration of organic matter as compared with grass areas, time 360 min. Conclusion The best adsorption capacity was obtained with minimal adsorption amounts of 84% to the area of soil composed of 67% for trees and grass areas.

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“…É considerada um processo que apresenta simplicidade operacional, capaz de remover sólidos, utilizado há décadas para o tratamento de água visando à potabilidade em comunidades rurais (Coelho & Di Bernardo, 2012).…”

Section: Introductionunclassified

Diferentes formas de aplicação da semente de Moringa oleifera no tratamento de água

Arantes

Paterniani

Rodrigues

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OCoagulantes naturais e sistemas de filtração são tecnologias de tratamento de água, indicadas para comunidades rurais ou isoladas. Este estudo objetivou comparar duas formas de aplicação de coagulante extraído de sementes de Moringa oleifera. Utilizaramse o coagulante líquido (10 mL L -1 a 20 g L -1) e sachê contendo 0,8 g de pó de sementes de Moringa oleifera. Após as etapas de dispersão da proteína presente nas sementes de Moringa oleifera, coagulação e floculação efetuaram-se pré-filtração ascendente e filtração lenta. Diferenças significativas foram observadas entre o uso do coagulante líquido e sachê na redução de turbidez e cor aparente. Com o uso dos sachês o pré-filtro foi menos eficiente notando-se reduções médias de turbidez igual 73 e 83% para os sachês e coagulante líquido, respectivamente. No filtro lento verificou-se redução média de 84 e 60% com o uso de sachês e coagulante líquido, respectivamente. Considerando todo o sistema de filtração, o uso dos sachês resultou em elevados percentuais de redução de turbidez e cor aparente; além de que seu preparo não requer o uso de água, condição que favorece sua aplicação em regiões em que há escassez de água com qualidade. Different forms of application of Moringa oleifera seeds in water treatmentA B S T R A C T Natural coagulants and filtration systems are suitable water treatment technologies in rural or isolated communities. This research aimed to compare two forms of application of coagulant extracted from Moringa oleifera seeds. Coagulant liquid (10 mL L -1 at 2%) and pouches containing 0.8 g powder were used. The dispersion, coagulation and flocculation steps were performed prior to both up flow gravel pre-filtration and slow sand filtration. Significant differences were observed for the liquid coagulant and pouches regarding the reduction of turbidity and apparent color. Although the up flow gravel pre-filter was less effective with the use of pouches, with an average reduction of turbidity of 73.5 and 82.5% for the pouches and liquid coagulant, respectively, the effluent of the slow filter presented lower turbidity, with an average reduction of 83.9 and 60.1% for the pouches and liquid coagulant, respectively. Considering the filtration system (up flow gravel pre-filter and slow sand filter) the use of pouches showed high reduction of turbidity and apparent color. The preparation of pouches does not require the use of water, a condition that favors its application in areas with lack of water of acceptable quality. Palavras-chave:saneamento rural coagulante natural filtração lenta

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Remoção de atrazina e metabólitos pela filtração lenta com leito de areia e carvão ativado granular

Cited by 10 publications

References 23 publications

Comparative Analysis of Granular and Membrane Filters for Rainwater Treatment

Comparative Analysis of Granular and Membrane Filters for Rainwater Treatment

Organic matter content in riparian areas of soil composed of woody vegetation and grass and its effects on pesticide adsorption

Diferentes formas de aplicação da semente de Moringa oleifera no tratamento de água

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