Evaluation of the natural coagulant Moringa oleifera as a pretreatment for SODIS in contaminated turbid water

Keogh, Michael B.; Elmusharaf, Khalifa; Borde, Preeti; McGuigan, Kevin G.

doi:10.1016/j.solener.2017.10.010

Cited by 50 publications

(29 citation statements)

References 18 publications

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“…Articles regarding coagulation processes by MO seed powder were not included in the present review because most of them do not quantify the microorganisms removed. However, MO seed powder has also been widely reported to reduce water turbidity and also reduction coliform count which makes the seed powder a good source for water purification [26,27]. Even though the articles that addressed the used of moringa to treat drinking water none of them quantified and compared that infected and treated water according to European Union standard for a drinking water.…”

Section: Discussionmentioning

confidence: 99%

The antimicrobial properties of Moringa oleifera Lam. for water treatment: a systematic review

et al. 2020

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Plant extracts have been used as alternatives to the conventional chemical water treatment. Moringa oleifera Lam. is one of the plants used for this purpose due to its antimicrobial and coagulant properties. However, there is no systematization of Moringa's application methodology. Different parts of the plant, extraction methods and concentrations can be applied to remove several pathogens present in contaminated drinking water. In the present work, reported Moringa applications with antimicrobial effect were systematically reviewed, in order to identify effective methodology(ies) for water treatment. Forty-nine articles were screened for: (1) part of the plant used, (2) extraction method, (3) extract concentration, (4) targeted pathogens, and (5) inhibition zone obtained. Nine articles complied with these criteria and were carefully analyzed; eight of them reported on leaf extracts and only one on seed extracts. Two approaches were used: analysis by pathogen and overall analysis. A total of eight different extraction methods were reported. Extract concentrations used ranged from 0.02 to 800 mg mL −1 and were tested on twenty pathogens. Our analysis revealed that none of such methods is effective against all the tested pathogens. However, leaf extracts obtained with distilled water or with 95% ethanol were the most effective ones for a higher number of pathogens such as Escherichia coli and, possibly, Vibrio cholerae. Moreover, Moringa's extract concentration of 30 mg mL −1 obtained by the 95% ethanol extraction method was the most efficient. Findings suggest an effective procedure to use Moringa, reinforcing its importance as an environmentally friendly alternative for water treatment in areas lacking a water supply system.

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Section: Discussionmentioning

confidence: 99%

The antimicrobial properties of Moringa oleifera Lam. for water treatment: a systematic review

et al. 2020

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“…The pseudo-second order model derived from the Ho-Mckay's postulation on the adsorption kinetics are expressed as in Eqs. 7and (8). The underlying principle of the pseudo second order model is that the predominant forces are chemical in nature [35] and the adsorption is adapted and transfigured due to the sharing of valence electrons between the adsorbent and the adsorbate molecules.…”

Section: Adsorption Isotherm and Kineticsmentioning

confidence: 99%

“…In recent studies, plant based bio-coagulants are being reported for their high coagulation capacities. The 4 major plant-based coagulants that are studied extensively are -Strychnos potatorum, Moringa Oleifera [8], Tannin and Cactus. To completely comprehend on how to utilize natural coagulants, it becomes essential to understand the coagulation mechanisms of these coagulants.…”

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confidence: 99%

Removal of solids from surfactant wastewater through synergetic utilization of Strychnos potatorum and Colocasia esculenta

Sriram¹,

Swaminathan²,

Saravanan³

2019

DWT

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The presence of surfactants typically found in laundry discharge poses a serious threat to aquatic niche when let out in open water bodies. In the present study, activated carbon produced from a novel source, Colocasia esculenta has been suggested as adsorbent to trap turbid colloids present in the surfactant wastewater. A synthetic wastewater was prepared by spiking kaolin in aqueous solution for different concentrations and the adsorption studies have been conducted. The carbon has been modified into carbon-sodium alginate bead complex and the operating parameters like pH, adsorbent dosage and its contact time under different concentrations have been optimized. The maximum equilibrium uptake capacity of 2.067 mg/g was achieved at 60 min with adsorbent dosage of 1.5 g conducted in neutral pH. Langmuir and Freundlich models were used to predict the reaction kinetics and it was hypothesized that multi-layer physisorption is predominant at higher concentrations. Strychnos potatorum, a common household bio-coagulant has been suggested in the continuous mode process designed specifically to treat the discharge form laundry. The total dissolved solids present in the wastewater has been reduced from 168 ppm to 12 ppm with a total reduction of 92.86%, while the turbidity has been reduced from an average 132 NTU to 10 NTU.

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“…Os coagulantes naturais, em locais remotos, são utilizados há vários anos (Katata-Seru et al, 2018), devido principalmente à dificuldade no acesso aos produtos químicos utilizados comumente como coagulantes (Keogh et al, 2017). Os principais aspectos positivos dos coagulantes naturais são: compostos não corrosivos; não promovem problemas de saúde e dispensam ajustes de pH e alcalinidade (Choy et al, 2014).…”

Section: Introductionunclassified

Uso de sementes de Moringa oleifera como agente coagulante para o tratamento de água (Use of Moringa oleifera seeds as a coagulant for the treatment of water)

Balbinoti¹,

Beghetto

Silva

et al. 2018

Rev. Bras. Geog. Fis.

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O sulfato de alumínio e o policloreto de alumínio são coagulantes químicos eficientes para formação de flocos em unidades de tratamento de água. No entanto, estes coagulantes podem contribuir para o desenvolvimento da doença de Alzheimer pelo alumínio residual na água pós-tratamento. Em razão disso, esta pesquisa teve como objetivo verificar a aplicação de extrato salino (CaCl2) de sementes de Moringa oleifera no tratamento de águas com baixa turbidez, usando flotação por ar dissolvido (FAD). A eficiência do processo foi determinada mediante os parâmetros cor, turbidez, pH e condutividade, os quais foram discriminados por Análise de Componentes Principais. Duas condições de turbidez (10 e 20 uT) foram utilizadas neste estudo, enquanto os ensaios de coagulação, floculação e FAD foram realizados com extratos salinos da semente nas dosagens de 10, 20, 30, 40 e 50 mg L-1. Os resultados indicaram que houve remoção de turbidez (64,2 e 78,2%) e cor (77,6 e 72,4%) em águas com turbidez de 10 e 20 uT, respectivamente. A condutividade aumentou em função do maior acréscimo de coagulante, enquanto o pH não foi alterado de forma significativa. Concluiu-se, desta forma, que o uso do coagulante Moringa oleifera favoreceu a remoção dos parâmetros cor e turbidez, melhorando a qualidade da água. Palavras-chave: Qualidade da água. Coagulante natural. Flotação por ar dissolvido. Análise Quimiométrica.

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Evaluation of the natural coagulant Moringa oleifera as a pretreatment for SODIS in contaminated turbid water

Cited by 50 publications

References 18 publications

The antimicrobial properties of Moringa oleifera Lam. for water treatment: a systematic review

The antimicrobial properties of Moringa oleifera Lam. for water treatment: a systematic review

Removal of solids from surfactant wastewater through synergetic utilization of Strychnos potatorum and Colocasia esculenta

Uso de sementes de Moringa oleifera como agente coagulante para o tratamento de água (Use of Moringa oleifera seeds as a coagulant for the treatment of water)

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