The use of Moringa oleifera as a natural coagulant in surface water treatment

Camacho, Franciele Pereira; Sousa, Vânia Serrão; Bergamasco, Rosângela; Teixeira, Margarida Ribau

doi:10.1016/j.cej.2016.12.031

Cited by 213 publications

(105 citation statements)

References 26 publications

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“…A moringa é uma planta tropical bem conhecida devido as suas características nutricionais únicas e a presença de componentes ativos coagulantes que podem ser amplamente utilizada em tratamentos ambientais como, por exemplo, purificação de água para consumo e águas residuárias provenientes de diversos processos [18][19][20][21][22][23] . …”

Section: Ntroduçãounclassified

Biomassas brasileiras aplicadas à remoção de urânio de drenagem ácida de minas por processos de biossorção

Boniolo

Yabuki

Mortari

et al. 2017

RHE

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Resumo: Este trabalho teve como objetivo avaliar a redução da concentração de urânio em área de drenagem ácida de mina. O Brasil possui a sexta maior reserva de urânio do mundo e há grande quantidade de rejeitos acumulados contendo íons metálicos, semimetálicos e radiotóxicos. O método utilizado neste estudo para remover urânio foi a biossorção mediante a aplicação de biomassas brasileiras. Os efluentes aplicados foram coletados na mina Osamu Utsumi, que pertence às Indústrias Nucleares do Brasil e os biossorventes empregados nos ensaios foram cascas de banana, semente de moringa e borra de café. A decomposição térmica, a porosimetria de adsorção de nitrogênio e a microscopia eletrônica de varredura (MEV) foram realizadas para caracterizar fisicamente os biossorventes. A partir dos resultados obtidos, observou-se que os biossorventes com maior área de superfície e maior volume de poros resultaram em maiores valores de eficiência de remoção, com uma ordem crescente desses parâmetros: cascas de banana < borra de café < sementes de moringa. Considerando as amostras de efluentes com concentração de urânio de 6 mg L -1 , as sementes de moringa apresentaram remoção de aproximadamente 87%, enquanto a borra de café e cascas de banana apresentaram remoção de 74 e 56%, respectivamente.Palavras-chave: Adsorção de urânio. Drenagem ácida de mina. Casca de banana. Semente de moringa. Borra de café.Abstract: This work aimed to evaluate the uranium concentration reduction in acid mine drainage. Brazil owns the sixth biggest uranium reserve in the world and there is large amount of accumulated tailings containing metallic, semi-metallic and radiotoxic ions. The method used in this study to remove uranium was biosorption by applying Brazilian biomass. The applied effluents were collected at the Osamu Utsaumi mine, which belongs to Industries Nucleares of Brazil and the biosorbents used in the tests were banana peel, moringa seed and spent coffee ground. Thermal decomposition, nitrogen adsorption porosimetry and scanning electron microscopy (SEM) were performed in order to characterize the biosorbents physically. From the results, it was observed that the biosorbents with a higher surface area and higher pore volume resulted in higher removal efficiency values, with an ascending order of these parameters: banana peels

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Section: Ntroduçãounclassified

Biomassas brasileiras aplicadas à remoção de urânio de drenagem ácida de minas por processos de biossorção

Boniolo

Yabuki

Mortari

et al. 2017

RHE

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“…A recent study by Katata-seru et al [19] synthesised Moringa oleifera seed extract with iron chloride solution ultimately increase the removal percentage of nitrate from ground and surface water to 85%. A study on the oil extraction of Moringa oleifera seeds and its effectiveness at different turbidity was done by [17]. The research discovered that oil extraction is not necessary when using Moringa oleifera as natural coagulant and it performed better in removing Chlorophyll A and turbidity in high turbid water.…”

Section: Fruit Wastesmentioning

confidence: 99%

Effectiveness of Natural Coagulant in Coagulation Process: A Review

Amran¹,

Zaidi²,

Muda³

et al. 2018

IJET

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Natural coagulants have been increasingly popular in the past few years due to its benefits and the fact that it resolves mos t of the associated problems when using chemical coagulants. Plant-based natural coagulants perform coagulation either by polymer bridging or charge neutralization, it can be extracted from various plant components. Concerted research and development efforts have been conducted in discovering new plant species and constituents that can be used as natural coagulants, which further boosting the effectiveness of existing plant-based natural coagulants. The objective of this paper is to provide a mini review on studies done over the span of ten years regarding plant-based natural coagulants. This paper also includes advantages and disadvantages of natural coagulants prior to identify several potential research gaps to provide platform towards the need of further study.

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“…[12] This characteristic hinders the application of biological processes, since numerous organic compounds in young leachate cannot be degraded by the microorganisms in these treatments. [26,28,29] In this process, the hydrolyzed coagulant species come into contact with impurities, forming destabilized particles during the fast mixing step. [20][21][22][23] Coagulation-flocculation is a widely accepted pretreatment method employed to remove materials that are in colloidal suspension (organic and/or inorganic) or that remain dispersed in the solution and cannot be removed by conventional physical processes.…”

Section: Introductionmentioning

confidence: 99%

“…This method has been applied for the treatment of several types of effluents, [12,[23][24][25][26][27] using chemical (aluminum sulfate, ferric chloride, polyaluminum chloride) or vegetable salts (biocoagulants). [26,28,29] In this process, the hydrolyzed coagulant species come into contact with impurities, forming destabilized particles during the fast mixing step. The collision of these destabilized particles (an essentially physical step) then forms larger particles or flocs, which can be removed by means of sedimentation, flotation or rapid filtration.…”

Section: Introductionmentioning

confidence: 99%

“…[23] However, when the aim is to eliminate organic load, color and odor, a limiting factor is that organic compounds cannot be destroyed (mineralized) by this method alone, thus requiring the use of additional treatments. [28] The use of AOPs has been considered the best solution to degrade refractory compounds in wastewater. [31] These methods are characterized by their generation of hydroxyl radicals ( * OH), which can mineralize highly recalcitrant compounds.…”

Section: Introductionmentioning

confidence: 99%

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Landfill Leachate Treatment by Combining Coagulation and Advanced Electrochemical Oxidation Techniques

et al. 2019

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This paper presents and discusses the results obtained in the treatment of raw landfill leachate (RLL) with a combination of coagulation-flocculation (Alum) and electrochemical techniques, using a filter-press reactor with a boron-doped diamond electrode. The success of the treatment was demonstrated by the quality of the treated water, which was evaluated based on parameters such as color, odor, turbidity, chemical oxygen demand, biochemical oxygen demand, free and total chlorine, total nitrite and nitrate, ammonia and microbiological tests (mesophiles and termotolerant coliforms). The best conditions for coagulation-flocculation involved a dosage of 20 mL/L Al 2 (SO 4 ) 3 (50 g/L) at pH 6.0. To reduce energy consumption, the electrochemical treatments were carried out by applying different limiting current density (i lim ) step sequences. This strategy reduced the energy consumed in the removal of the organic load by up to 40 % while maintaining a similarly effective mineralization rate (> 90 % COD removal) between the steps. Microbiological tests revealed that the number of mesophiles was more than twelve orders of magnitude lower after electrolysis, indicating the important sanitizing effect caused by the HClO/chloramine species generated in the process. Color, turbidity and ammoniacal nitrogen were completely eliminated from the treated leachate by the end of the electrolysis process.[a] M.

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The use of Moringa oleifera as a natural coagulant in surface water treatment

Cited by 213 publications

References 26 publications

Biomassas brasileiras aplicadas à remoção de urânio de drenagem ácida de minas por processos de biossorção

Biomassas brasileiras aplicadas à remoção de urânio de drenagem ácida de minas por processos de biossorção

Effectiveness of Natural Coagulant in Coagulation Process: A Review

Landfill Leachate Treatment by Combining Coagulation and Advanced Electrochemical Oxidation Techniques

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