Enhanced water treatment by Moringa oleifera seeds extract as the bio-coagulant: role of the extraction method

Hoa, Nguyen Thanh; Hue, Cao Thi

doi:10.2166/aqua.2018.070

Cited by 18 publications

(18 citation statements)

References 46 publications

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“…Recently, there has been a tremendous campaign on the use of sustainable approaches to address the environmental challenges of wastewater treatment and remediation [9][10][11]. In this regard, bio-coagulants such as Moringa oleifera (MO) biomass seeds have been recommended and extensively used as an effective alternative for the treatment of wastewaters, notably in Africa and Asia [2,12].…”

Section: Introductionmentioning

confidence: 99%

“…The wastewater treatment using MO biomass is based on the coagulation-flocculation process in which the pollutant removal is achieved due to the presence of cationic protein in MO biomass seed [15,16], thereby forming small flocs with suspended particles and organic matters in the wastewater which are allowed to settle or sediment under varying contact times [10,17]. The coagulation mechanism of an MO biomass seed has been well discussed in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic and Prediction Modeling Studies of Organic Pollutants Removal from Municipal Wastewater using Moringa oleifera Biomass as a Coagulant

Adelodun

Ogunshina

Ajibade

et al. 2020

Water

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This study investigated the potential of Moringa oleifera (MO) seed biomass as a coagulant for the removal of turbidity, biochemical oxygen demand (BOD), and chemical oxygen demand (COD) of municipal wastewater. Triplicated laboratory experiments using MO coagulant added at varying treatment dosages of 50, 100, 150, 200 mg/L, and a control (0 mg/L) treatment were performed for a settling period of 250 min at room temperature. Kinetics and prediction variables of cumulative turbidity, BOD, and COD removal were estimated using simplified first order and modified Gompertz models. Results showed that the maximum removal of turbidity, BOD, and COD were 94.44%, 68.72%, and 57.61%, respectively, using an MO dose of 150 mg/L. Various kinetic parameters, such as rate constant (r), measured (REm) versus predicted (REp) cumulative removal, and specific pollutant removal rate (µm), were also maximum when an MO dose of 150 mg/L was added, the standard error being below 5%. The developed models were successfully validated over multiple observations. This study suggests low cost and sustainable removal of turbidity, BOD, and COD of municipal wastewater using MO seed biomass as a coagulant.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetic and Prediction Modeling Studies of Organic Pollutants Removal from Municipal Wastewater using Moringa oleifera Biomass as a Coagulant

Adelodun

Ogunshina

Ajibade

et al. 2020

Water

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“…The coagulation process is commonly used for removing humic substances from water [10,11], and increasing its effectiveness is obtained by the use of electrocoagulation [12][13][14] or other modifications connected with increasing coagulant effectiveness [15][16][17]. Satisfactory effects in removing humic substances have been found with the use of natural coagulants, such as powdered added sea bream, or powdered Moringa oleifera fruits [18,19]. Studies have shown that aluminum coagulants are more effective in removing humic compounds than iron coagulants [20].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of humic substance removal during the coagulation process

2019

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This study concerns the utility of the coagulation process in removing humic substances and its dependence on the properties of these substances and their concentrations. The coagulation process was performed on model solutions of natural humic acids. Polyaluminum chloride (PAX XL3) and aluminum sulfate were used for this study, which allowed for a comparison of the effectiveness of pre-hydrolyzed and hydrolyzing coagulants. The coagulant dosages were determined as gram aluminum per gram carbon, thanks to which it was possible to compare the process effectiveness for different initial organic carbon concentrations, whose values were in the range of 5.51-21.23 gC/m 3. The obtained values of reductions in organic carbon concentrations point to a significant process effectiveness (37.2-59.4% and 20.0-41.5% for pre-hydrolyzed and hydrolyzing coagulants, respectively), which increased with increasing molecular mass of the humic substances present in water. These results are analogous to those found for coagulation of surface waters and point to a greater effectiveness of pre-hydrolyzed coagulant in removing humic substances (at the same coagulant dosage). The effectiveness in removing organic substances increased with coagulant dosage and the initial total organic carbon concentration. The coagulation process most effectively removed aromatic substances absorbing UV light. The content of substances absorbing UV light in raw and post-coagulation water was proportional to the dissolved organic carbon content.

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“…The effectiveness of moringa seeds in clarifying the water of the Loumbila dam was compared with that of aluminum sulphate, with a view to finding an alternative to the harmful consequences of the use of the latter on human health and the environment. Several studies have already been conducted on the use of Moringa seeds to clarify raw water (Adeniran et al, 2017;Camacho et al, 2017;Hoa and Hue, 2018;Zaid et al, 2019). Indeed, these ground seeds, added to water acts as primary coagulant and can clarify any water regardless of its degree of turbidity.…”

Section: Discussionmentioning

confidence: 99%

“…In view of this, the use of biological processes for the treatment of surface water could be a sustainable alternative because of the availability and non-toxicity of such treatment (Chong and Kiew, 2017). Thus, several studies on water clarification with natural coagulants like Moringa seeds (Adeniran et al, 2017;Camacho et al, 2017;Hoa and Hue, 2018) or other natural coagulants (Adewuyi and Adewumi, 2018;Benalia et al, 2019;Freitas et al, 2015;Hussain and Hydar, 2019;Jayalakshmi et al, 2017) have already been carried out. Other researches have shown the efficiency of addition of Opuntia ficus-indica extracts as coagulant aids or flocculant (Adjeroud-Abdellatif et al, 2020;Bouaouine et al, 2019;Karanja et al, 2017;Othmani et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the effects of Herbal and chemical Coagulants in the clarification of raw water

Konkobo¹,

Diao²,

Savadogo³

et al. 2021

Afr. J. Agric. Res.

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The use of aluminum sulphate in clarifying raw waters raises many concerns about its impact on human health. Thus, the present study was initiated to compare the effects of Moringa oleifera and aluminum sulphate besides evaluating the association between M. oleifera or aluminum sulphate with Opuntia ficus-indica or syntofloc for water treatment. The essays were carried in Jar Test using waters of 352.80 Nephelometric Turbidity Units (NTU). The monitoring of different physico-chemical and microbiological parameters at different doses and after different decanting time was used to determine optimal conditions and evaluate the effectiveness of treatment. The results showed that it took fewer doses and less decanting time for aluminum sulphate than moringa to obtain the same residual turbidity. The use of 0.9 g/L of moringa removed 99% of turbidity after 12 h of decanting. Successive use of moringa (0.9 g/L) with O. ficus-indica extract (0.6 ml) reduced the decanting time to 15 min. However, this treatment eliminated only about 57% of total coliforms. The moringa/cactus association, although highly effective, remains less than the treatment based on aluminum sulphate and synthofloc. This "organic" association is nevertheless an ideal alternative because of its great capacities that could be further optimized.

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Enhanced water treatment by Moringa oleifera seeds extract as the bio-coagulant: role of the extraction method

Cited by 18 publications

References 46 publications

Kinetic and Prediction Modeling Studies of Organic Pollutants Removal from Municipal Wastewater using Moringa oleifera Biomass as a Coagulant

Kinetic and Prediction Modeling Studies of Organic Pollutants Removal from Municipal Wastewater using Moringa oleifera Biomass as a Coagulant

Effectiveness of humic substance removal during the coagulation process

Comparative study of the effects of Herbal and chemical Coagulants in the clarification of raw water

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