Characterisation and performance of three Kenaf coagulation products under different operating conditions

Okoro, B. U.; Sharifi, Soroosh; Jesson, Mike; Bridgeman, John; Moruzzi, Rodrigo Braga

doi:10.1016/j.watres.2020.116517

Cited by 18 publications

(33 citation statements)

References 41 publications

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“…As illustrated in Table 2, the pH values obtained are related to the type of solvent used during the extraction process. The values recorded for the zeta potential were all negative and is consistent with previous studies, which reported Hibiscus seeds as predominantly having negatively charged surfaces (Jones & Bridgeman, 2016;Okoro, Sharifi, Jesson, Bridgeman, & Moruzzi, 2021).…”

Section: Resultssupporting

confidence: 91%

“…KPFs with higher protein concentration gave the best removal rates indicating that the protein content in the extracts was key to the coagulation-flocculation process. Also, based on our previous work (Okoro, Sharifi, Jesson, Bridgeman, & Moruzzi, 2021), the solubilization process using salt (NaCl) improved the protein dissolution process, possibly leading to an improved polymer-particle interaction.…”

Section: Contribution Of Kenaf Protein Fraction To the Organic Matter...mentioning

confidence: 96%

“…Results presented outlines the potentials of KCPs comparable to polyelectrolytes used in previous studies with slow mix ranging from 20 to 60 rpm (Bratby, 2016;Jones & Bridgeman, 2016;Muyibi & Evison, 1995;Okoro, Sharifi, Jesson, Bridgeman, & Moruzzi, 2021). After mixing was completed, samples were allowed to stand for 70 min before withdrawing unfiltered supernatant from 30 mm below the liquid surface with a syringe into the turbidimeter sample cell for measurements.…”

Section: Coagulation-flocculation Experimentsmentioning

confidence: 99%

“…A primary limitation reported during the use of these kenaf coagulation products (KCPs) is their contribution to the organic matter content of treated water (Okoro, Sharifi, Jesson, Bridgeman, & Moruzzi, 2021 ), which has cast doubts on their safe use for drinking water purification. Different treatment techniques have been researched to explore new ways to reduce the organic carbon content of these KCPs.…”

Section: Introductionmentioning

confidence: 99%

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Protein fractionation of Hibiscus cannabinus (kenaf) seeds, its characterization, and potential use for water treatment

Okoro

Sharifi

Jesson

et al. 2022

Water Environment Research

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This study evaluates the coagulation performance of kenaf protein fractions (KPFs) comprising of albumin (AlbKP), globulin (GloKP), prolamin (ProKP), and glutenin (GluKP), in the treatment of high (500 NTU), medium (150 NTU), and low (30 NTU) turbidity water. Based on preliminary experimental results, the study focused on GloKP due to it outperforming the other kenaf coagulation products (KCPs) in all water types tested. The influence of GloKP, both as a primary coagulant and coagulant aid to aluminum sulfate (AS) on organic matter removal, was examined. Parametric analysis on turbidity, TSS, pH, dosages, retention time, and KPFs storage time was completed. Results indicated that GloKP could be used both as a primary coagulant and coagulant aid. GloKP had a higher turbidity and solids removal than the AlbKP and other KPFs (ProKP and GluKP). Solution pH greatly influenced the performance of the GloKP, and optimum dosage at pH 2 resulted in the highest organic matter removal. High dosages also resulted in negative mobility of particles and a more stable suspension. When used as a coagulant aid to AS, GloKP was more effective in removing dissolved organic carbon (DOC). Scanning electron microscopy elemental analysis (SEM-EDAX) and Fourier transform infrared (FT-IR) spectra showed the structure of the KPFs. SEM-EDAX indicated the presence of metal cations capable of forming complexes essential for flocs formation. The enhanced floc formation, detailed in this paper, is ascribed to the collective effect of charge neutralization of the AS species and the adsorption and bridging effect of the GloKP, which improves the bonds formed between flocs. The coagulation-flocculation process can be significantly improved using dual coagulants. GloKP was also an excellent alternative to its crude (CrKP) and solvent extract (HxKP) form for removing suspended and dissolved particles from all water types.

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Section: Resultssupporting

confidence: 91%

Section: Contribution Of Kenaf Protein Fraction To the Organic Matter...mentioning

confidence: 96%

Section: Coagulation-flocculation Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Protein fractionation of Hibiscus cannabinus (kenaf) seeds, its characterization, and potential use for water treatment

Okoro

Sharifi

Jesson

et al. 2022

Water Environment Research

Self Cite

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show abstract

“…In another research, the authors tested the effectiveness of the Moringa oleifera seeds as bio-coagulant for surface water turbidity treatment (Nhut et al 2021). Hexane, Saline and Crude were extracted from Kenaf plant seed for determining a reliable coagulation to remove organic matter (Okoro et al 2021).…”

Section: Related Researchmentioning

confidence: 99%

River water turbidity removal using new natural coagulant aids: case study of Euphrates River, Iraq

et al. 2021

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For turbidity removal, most of drinking water treatment plants are using coagulants due to the presence of suspended and colloidal materials at the coagulation and flocculation units. Aluminium and sulphates salts are the widely used coagulants, such as Aluminium sulphate (Alum) and ferric chloride. However, several researches have linked Alzheimer's disease to the use of Aluminium sulphate. Hence, scholars have conducted several researches on the possibility to reduce the amount of Aluminium sulphate by using natural material/plants base as coagulant aids. In this study, Mallow's Leaves Extracts (MLE) and Carob's Pods Extracts (CPE) were used as an alternative coagulant aid. Couples of coagulation tests were implemented to find the optimal dosage of Aluminium Sulphates were used as coagulants. The results displayed that the maximum turbidity removal efficiency by adding 100% of each coagulant (i.e., Alum, MLE and CPE) were (61.16%, 51.175% and 37.12%), respectively. In addition, the minimum residual turbidity and maximum turbidity removal efficiency were 4.56 NTU and 97.72% by adding 22.5 Alum and 7.5 MLE presenting 30 mg/l dosing. Further, the minimum residual turbidity and maximum turbidity removal efficiency were 15.4 NTU and 92.3% by adding 22.5 Alum and 7.5 CPE presenting 30 mg/l dosing.

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Exploring Potentials and Constraints of H2O2 Water Disinfection for Household Settings

Silva

Sabogal-Paz

2021

Water Air Soil Pollut

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Characterisation and performance of three Kenaf coagulation products under different operating conditions

Cited by 18 publications

References 41 publications

Protein fractionation of Hibiscus cannabinus (kenaf) seeds, its characterization, and potential use for water treatment

Protein fractionation of Hibiscus cannabinus (kenaf) seeds, its characterization, and potential use for water treatment

River water turbidity removal using new natural coagulant aids: case study of Euphrates River, Iraq

Exploring Potentials and Constraints of H2O2 Water Disinfection for Household Settings

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