A review on common vegetables and legumes as promising plant-based natural coagulants in water clarification

Choy, Sook Yan; Prasad, Krishna Murthy Nagendra; Wu, Ta Yeong; Ramanan, Ramakrishnan Nagasundara

doi:10.1007/s13762-013-0446-2

Cited by 169 publications

(103 citation statements)

References 80 publications

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“…Natural polymers are an economically viable alternative to chemical coagulants (Sanghi et al 2006;Choy et al 2015). Natural polymers based on lentil extract have been used as treatment agents to reduce turbidity; however they have not been applied yet in coagulation and flocculation processes in the paper industry.…”

Section: Introductionmentioning

confidence: 99%

Zeta Potential as a Tool to Evaluate the Optimum Performance of a Coagulation-flocculation Process for Wastewater Internal Treatment for Recirculation in the Pulp and Paper Process

Ordaz-Díaz¹,

Valle‐Cervantes²,

Rodríguez-Rosales³

et al. 2017

BioResources

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The pulp and paper mill process requires large amounts of water. Therefore, the need to reuse water through the application of coagulation-flocculation processes, which is effective in the removal of solids and colloidal particles, has risen. In such processes, zeta potential (ZP) provides important information about the efficiency of the reagents used. The purpose of this study was to develop individual and combined tests of reagents to study turbidity and COD reduction based on ZP in the process of wastewater internal treatment for recirculation in the pulp and paper process. Factorial models were developed to explain the behavior of ZP depending on the different coagulants/flocculants. The statistical analyses showed that ZP had a positive correlation with parameters related to removal (COD and turbidity). It was demonstrated that innovate use of lentil extract (Lens esculenta) applied with aluminum sulfate favored the treatment, consistent with a coagulation-flocculation mechanism. The optimum doses of lentil extract were able to reduce the requirements of aluminum sulfate by almost 29%, providing an alternative strategy for water reuse processes in the pulp and paper industry.

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Section: Introductionmentioning

confidence: 99%

Zeta Potential as a Tool to Evaluate the Optimum Performance of a Coagulation-flocculation Process for Wastewater Internal Treatment for Recirculation in the Pulp and Paper Process

Ordaz-Díaz¹,

Valle‐Cervantes²,

Rodríguez-Rosales³

et al. 2017

BioResources

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“…Different trends were observed with both leucaena and papaya (Figures 3b and 3c). At low coagulant dosage, turbidity removal was low due to insufficient coagulating agent (Choy et al, 2015); however, overdosage could lead into colloid The protein in the seeds was the active coagulant agent in this study. It is known that protein is an amphoteric molecule, which is highly influenced by pH; at a pH above its isoelectric point, the protein molecule will have negative surface charge.…”

Section: Effect Of Dosage and Ph On Turbidity Removalmentioning

confidence: 77%

“…The effect of M. oleifera dosage was reported by Pritchard et al (2010); beyond the optimum coagulant dosage, the coagulation effect became less effective, thus constant % removal was obtained (Pritchard et al, 2010). Overdosage of coagulant tends to lead to a colloid restabilization effect (Choy et al, 2015); however, this effect is not observed in M. oleifera (Ndabigengesere et al, 1995). Different trends were observed with both leucaena and papaya (Figures 3b and 3c).…”

Section: Effect Of Dosage and Ph On Turbidity Removalmentioning

confidence: 93%

Exploration of Various Indonesian Indigenous Plants as Natural Coagulants for Synthetic Turbid Water

Kristianto¹,

Paulina²,

Soetedjo³

2018

IJTech

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The availability of clean water is one of the biggest global problems, especially in developing countries. The simplest way to treat turbid water is by using coagulation. However, the utilization of chemical coagulants such as alum and ferrum has several drawbacks, including a high sludge volume and negative health impact when the water is consumed. Natural coagulants offer a better option, especially because of their availability, low price, lower sludge volume, and effectiveness comparable with chemical coagulants. In this study we utilize Moringa oleifera, Carica papaya and Leucaena leucocephala seeds, which are indigenous plants in Indonesia, as natural coagulants. An FTIR study was conducted to qualitatively identify the possible active coagulant agent in the seeds. The coagulant performance in removing turbidity of synthetic kaolin water was studied using jar test apparatus at various levels of coagulant dosage and pH. Functional groups of -OH, N-H, C=O, and primary, secondary and tertiary amides were identified in all the seeds. Neither the dosage nor the pH had an effect on turbidity removal when M.oleifera was used as the natural coagulant, but did have some effect on papaya and leucaena. The turbidity removal obtained in this study was comparable with other reported results, therefore it can be concluded that these seeds have the potential to be used as natural coagulants.

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“…The aluminium dose slightly lowered this value to 6.31. However, all of the suspensions showed pH values that were within the optimum range for CF processes (Choy et al 2015, Gorin et al 2015. (2010) reported the acetylation of Musa paradisiaca L. plantain species.…”

Section: Color and Turbidity Removalmentioning

confidence: 95%

EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBTAINED FROM TOPOCHO PELIPITA PLANTAIN CLONE (Musa ABB) FOR TURBIDITY AND COLOR REMOVAL IN RAW WATERS

Tirado

Herrera

Correa

2017

Rev. Int. Contam. Ambie.

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Flocculation and coagulation of organic material contained in raw water samples were evaluated by using starch as coagulation agent. The starch was obtained from topocho pelita (Musa ABB) plantain clone, which is grown in the south area of the department of Bolivar, Colombia. Native starch (NS) was chemically modified with acetic anhydride obtaining an 18.3 % degree of acetylation (low acetylated starch, LAS) and 23.7 % (high acetylated starch, HAS). The chemical structure of these biomaterials was analysed by Fourier transform infrared (FTIR) spectroscopy. Characteristic peaks were observed at 1350 cm -1 (C-O stretching) and 950 cm -1 (C-O-C bending). Scanning electron microscopy (SEM) was used to determine morphology and size of the starch samples. Elongated grain shapes with sizes of 37 ± 8 mm (NS), 35 ± 11 mm (LAS) and 307 ± 85 mm (HAS) were observed through this technique, suggesting a relationship between the degree of acetylation and the agglomeration of grains. Analysis of variance indicated that concentration of the starch samples is the only factor, which has a statistically significant effect on the response variables (color and turbidity) at a 95 % confidence level. Color removal capacities of 94 %, 93 % and 89 % were estimated using the NS, LAS and HAS samples, respectively, at a concentration of 200 mg/L. Additionally, a turbidity removal capacity of 96 % was estimated for the NS sample, which compares very well with the 95 % turbidity removal capacity obtained from the acetylated starches. The latter indicates that native starch presents suitable properties to be used as coagulation agent for water treatment.Palabras clave: almidón nativo, almidón acetilado, grado de acetilación, coagulación, floculación RESUMEN La floculación y la coagulación de materia orgánica presente en muestras de aguas crudas fueron evaluadas usando como agente coagulante almidón obtenido a partir del plátano del clon topocho pelipita (Musa ABB) cultivado en el sur del departamento de Bolívar, Colombia. La capacidad de coagulación del almidón nativo (NS, por sus siglas en inglés) fue comparada con almidón modificado químicamente con anhídrido Rev. Int. Contam. Ambie. 33 (Especial Biotecnología e ingeniería ambiental) 125-134, 2017 DOI: 10.20937/RICA.2017 D.F. Tirado et al. 126 acético con grados de sustitución del 18.3 % (LAS, por sus siglas en inglés) y 23.7 % (HAS, por sus siglas en inglés). Espectroscopía de infrarrojo (FTIR, por sus siglas en inglés) fue usada para determinar la estructura química de estos biomateriales, se observaron vibraciones en 1350 cm -1 (estiramiento C-O) y 950 cm -1 (flexión C-O-C). Microscopía electrónica de barrido (SEM, por sus siglas en inglés) se usó para determinar la morfología y el tamaño de las muestras de almidón, se observó una forma de granos alargados, los cuales exhibieron tamaños de 37 ± 8 mm (NS), 35 ± 11 mm (LAS) y 307 ± 85 mm (HAS). Esto sugiere que el aumento en grados de sustitución puede ocasionar la aglomeración de los granos y su consiguiente aumento de tamaño. E...

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A review on common vegetables and legumes as promising plant-based natural coagulants in water clarification

Cited by 169 publications

References 80 publications

Zeta Potential as a Tool to Evaluate the Optimum Performance of a Coagulation-flocculation Process for Wastewater Internal Treatment for Recirculation in the Pulp and Paper Process

Zeta Potential as a Tool to Evaluate the Optimum Performance of a Coagulation-flocculation Process for Wastewater Internal Treatment for Recirculation in the Pulp and Paper Process

Exploration of Various Indonesian Indigenous Plants as Natural Coagulants for Synthetic Turbid Water

EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBTAINED FROM TOPOCHO PELIPITA PLANTAIN CLONE (Musa ABB) FOR TURBIDITY AND COLOR REMOVAL IN RAW WATERS

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