A contemporary review on plant-based coagulants for applications in water treatment

Saleem, Mussarat; Bachmann, Robert Thomas

doi:10.1016/j.jiec.2018.12.029

Cited by 128 publications

(74 citation statements)

References 130 publications

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“…In recent years, utilization of various natural resources as natural coagulant has gained a lot of interest due to its various advantages, such as: lower cost compared to chemical coagulants, it comes from renewable sources, less sludge volume generated, and biodegradable-nonhazardous sludge [1,2]. However there are some drawbacks in natural coagulant application, which we addressed in this research.…”

Section: Introductionmentioning

confidence: 99%

Adsorbed leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

Kristianto

Reynaldi

Prasetyo

et al. 2020

Sustain Environ Res

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Natural coagulants from plants resources have gained a lot of attention as it is renewable, biodegradable, non-hazardous, lower cost, and less sludge generated compared to chemical coagulants. However there are still some drawbacks, namely long settling time and possible increase of dissolved organic carbon in the treated water. In this paper we tried to address these drawbacks by utilizing citrate modified Fe3O4 to adsorb protein from Leucaena leucocephala as the active coagulating agent. The effect of trisodium citrate concentration and protein adsorption pH to the adsorbed protein was investigated. It was found that the trisodium citrate concentration of 0.5 M and pH 4.0 gave the highest protein adsorption. The obtained magnetic coagulant was furthermore characterized using Scanning Electron Microscopy, X-ray Diffraction, Fourier Transform Infrared Spectroscopy, and Transmission Electron Microscopy to observe the characteristics before and after protein adsorption. Furthermore, the effect of pH (2 to 10) and coagulant dosage (60 to 600 mg L− 1) to the removal of synthetic Congo red wastewater and sludge volume formation was investigated. It was found that pH 3 was the best pH for coagulation due to charge neutralization mechanism of leucaena protein. Furthermore the highest removal was obtained at dosage 420 mg L− 1 with 80% removal. This result was comparable with crude extract of leucaena with half settling time (20 min) and lower increase of permanganate value, indicating lower increase of dissolved organics in the treated water.

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Section: Introductionmentioning

confidence: 99%

Adsorbed leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

Kristianto

Reynaldi

Prasetyo

et al. 2020

Sustain Environ Res

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“…However, a study evaluating the combination of nopal as a coagulant and cassava starch as a flocculating aid has not been developed, as mentioned in literature reviews made by Jayalakshmi et al (2017) and Saleem and Bachmann (2019), even though it is a sustainable water treatment alternative. Here, our study assesses the efficacy of the mucilage mixture of nopal and cassava starch in removing turbitity during water treatment processes.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of the mixture of nopal and cassava starch as clarifying substances in water purification: A case study in Colombia

Lugo-Arias

Ovallos-Gazabon

et al. 2020

Heliyon

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Aluminum sulfate is one of the most used chemical coagulants in the world, but research has shown that high concentrations of aluminum in the body are associated with neuropathological conditions. Because of this, different alternatives have been evaluated such as natural coagulants, which are considered safe for human health and contain fewer contaminants than chemicals due to their biodegradation properties. The main objective of this study was to evaluate the efficiency of mixing nopal mucilage and cassava starch for turbidity removal in water purification. In this paper, test jars and the treatment equipment (TA-scale FQ-005/PE manufactured by Generatoris SA de CV of Mexico) was applied in order to measure turbidity and pH parameters before and after the process of coagulation-flocculation, which was applied to water from the Magdalena River in Colombia. Samples from two sampling periods were assessed. One was evaluated during the rainy season and the other was evaluated without precipitation (drought) with initial turbidities of 316 NTU and 80 NTU, respectively. It was found that aluminum sulfate as a coagulant reference obtained better turbidity removal results (up to 99%) as compared to nopal (up to 60.4%), and nopal-starch combination of cassava (up to 67%), indicating that this mixture increases the effectiveness of natural coagulants used individually. Our results indicate that this should be considered as an alternative in the water purification process.

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“…Strychnospotatorum (Nirmali seeds) and Eirchorrniacrassipes (water hyacinth) were seen to give better reduction for total suspended solids (TSS), COD and biological oxygen demand (BOD) over alum (Prabhakaran, Manikandan, & Boopathi, 2020). Among the extensive list of natural coagulants, Moringa Oleifera (MO) extract (Demir et al, 2019;Jiang, 2015) has been intensively investigated previously (Saleem & Bachmann, 2019). MO extract is reported to contain proteins acting as active coagulating agents that can effectively destabilize the suspended particles (Villaseñor-Basulto et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Multi-response optimization of the coagulation process of real textile wastewater using a natural coagulant

Redha

2020

Arab Journal of Basic and Applied Sciences

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The present study is an attempt to investigate the applicability of a natural coagulant Moringa Oleifera (MO) as a potential impending alternative for the treatment of textile wastewater. Face Central Composite Design in Response Surface Methodology was used to optimize the performance of the coagulation process in terms of turbidity and colour removal efficiency. Three independent variables which are pH (2-4), coagulant dosage (4-8 ml) and settling time (10-30 min) were investigated. Quadratic models were developed for each response and their statistical fitness was evaluated using ANOVA analysis. All models were proved to be statistically adequate with R 2 higher than 96%. Of the investigated variables, pH was found to have significant effect on both responses (P-value <0.001), whereas, coagulant dosage affected the colour removal efficiency significantly. Multi-response optimization was applied to optimize the process variables for both responses simultaneously using the RSM desirability function approach. Maximum turbidity reduction by more than 81% and colour removal efficiencies by more than 77% were reached at the optimum conditions of pH 2, coagulant dosage 4 mL and settling time 21 min. These results prove that MO could be used as an alternative to the conventional coagulants for real textile wastewater treatment.

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A contemporary review on plant-based coagulants for applications in water treatment

Cited by 128 publications

References 130 publications

Adsorbed leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

Adsorbed leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

Effectiveness of the mixture of nopal and cassava starch as clarifying substances in water purification: A case study in Colombia

Multi-response optimization of the coagulation process of real textile wastewater using a natural coagulant

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