Use of Ferric Chloride and Chitosan as Coagulant to Remove Turbidity and Color from Landfill Leachate

Ramli, Siti Fatihah; Aziz, Hamidi Abdul

doi:10.4028/www.scientific.net/amm.773-774.1163

Cited by 13 publications

(5 citation statements)

References 11 publications

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“…Figure (4): Effects of pH value on MB and MO removal using FeCl3 aided with lime 3.4 Adsorption isotherm Table (4) summerized the adsorption isotherms with correlation coefficients. The values R 2 of MO and MB for Langmuir isotherm were 0.998 and 0.912 respectively, which is higher than that obtained from Freundlich isotherms[4,6,30]. This indicates that Langmuir isotherm fully describes the nature and the sorption mechanism of MO and MB by chemical coagulation process.…”

mentioning

confidence: 68%

“…where Co is the initial dye concentration (mg/L), Ce is the dye concentration at equilibrium (mg/L), V is the volume of the used dye solution (L), and m is the mass of the adsorbent used (mg). The Langmuir model is based on the assumption that the surface is uniform with no interactions between adsorbed molecules and that, it has defined adsorption sites [16,30]. This model considers that adsorption takes place through the formation of an adsorbate monolayer and leads to the equation ( 2),…”

Section: Adsorption Isothermsmentioning

confidence: 99%

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Effective Chemical Coagulation Treatment Process for Cationic and Anionic Dyes Degradation

2022

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Throughout the industrial activities, water consumption is increased, resulting in large amounts of wastewater that must be treated before being discharged into the water streams. Coagulation/flocculation and sedimentation processes are considered as one of the most used chemical treatment methods for removing the majority of water contaminants. Cationic dye of methylene blue (MB) and anionic dye of methyl orange (MO) are common hazardous organic wastewater contaminants that mostly degraded by different chemical coagulants processes. Chemical coagulants act as an auxiliary agent in the coagulation/flocculation-sedimentation process. This study aimed to investigate the effectiveness of combined chemical coagulants of FeCl3/lime in the degradation of cationic and anionic dyes. In this work, kinetics, effect of adsorption parameters such as pH, initial concentration of dyes and the chemicals coagulants doses was studied. At an optimum coagulant dosage of (200/70) mg/L and (70/100) mg/L, and optimum pH ranged from (6.0 -8.0) for MO and MB, repectively . The achieved removal values for both anionic and cationic dyes using the combined coagulant (FeCl3/lime) were 97.78% and 95.54% for MO and MB, respectively. The maximum adsorption capacity of FeCl3/ lime was calculated from the isotherm at 500 mg/g. This technique was successfully conducted for the treatment of tannery and laundry wastewaters for improving the quality of pollution parameters and investigating the efficiency of the applied treatment technique. The achieved removal efficiencies for tannery and laundary wastewater ranged from 93.9 to 94.4 % for COD, 92.9 to 92.5% for BOD5 , 93.7 to 92.8% for TSS, and 96.7 to 99.2% for turbidity, respectively.

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mentioning

confidence: 68%

Section: Adsorption Isothermsmentioning

confidence: 99%

Effective Chemical Coagulation Treatment Process for Cationic and Anionic Dyes Degradation

2022

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“…Insufficient dose or overdosing leads to poor flocculation performance of the coagulant. Therefore, the optimal coagulant dose must be identified to reduce dosing costs and obtain optimal removal rates [55]. Due to the filtration The turbidity removal activity of the bio-coagulants may also be affected by changes in the molecular size or rearrangement of the monosaccharides of the polysaccharide chains in alkaline media [46,50].…”

Section: Effect Of Bio-coagulant Dosage On Turbidity Removalmentioning

confidence: 99%

“…Insufficient dose or overdosing leads to poor flocculation performance of the coagulant. Therefore, the optimal coagulant dose must be identified to reduce dosing costs and obtain optimal removal rates [55]. Due to the filtration stage, which retains approximately 70% of the insoluble powder precursors during bio-coagulant preparation, we chose to quantify the coagulant dose in units of (mL/200 mL) rather than (mg/L).…”

Section: Effect Of Bio-coagulant Dosage On Turbidity Removalmentioning

confidence: 99%

Comparison of Four Plant-Based Bio-Coagulants Performances against Alum and Ferric Chloride in the Turbidity Improvement of Bentonite Synthetic Water

Hadadi

Imessaoudene

Bollinger

et al. 2022

Water

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Due to their cost-effectiveness, low toxicity, and naturally renewable properties, bio-coagulants for water treatment are gaining popularity. In this context, four bio-coagulants were tested for their ability in turbidity reduction in a synthetic bentonite suspension: Opuntia ficus indica (OFI) and Moringa oleifera (MO) seeds, two well-established vegetal materials in the domain of bio-coagulation, and Algerian Aloe vera (AV) and Pinus halepensis seeds (PHS), both of which have received very few or no study in turbidity reduction in water and wastewater. A comparative study was conducted with regard to two well-known inorganic coagulants, ferric chloride and Alum. Extraction salts, pH, coagulant dose, initial turbidity, and aging effects were examined. When compared to chemical coagulants, the four bio-coagulants worked very well, removing approximately 100% of the turbidity at natural pH of 7.5 using optimal doses of 1.5, 3, 3, 3.5, 1.5, and 1.5 mL/200 mL for AV, OFI, MO, PHS, Alum, and FeCl3, respectively, at a broad range of pH (2 to 8), and causing no pH alteration of the treated water. Polysaccharides and proteins involved in inter-particle bridging and charge neutralization may be the active coagulation-flocculation molecules. The four bio-coagulants produced less sludge amount than Alum and Ferric chloride. This research not only shows that MO and OFI are effective in eliminating turbidity, but it also highlights the great potential of Algerian AV and PHS seeds as promising bio-coagulants in the treatment of polluted water.

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“…Nevertheless, chemical coagulants may have adverse effects on the environment. Hence, it is suggested that chitosan could be a better alternative (Verma et al 2012;Ramli and Aziz 2015;Nascimento et al 2016). Nascimento et al (2016) carried out a determination of the optimum dosage and pH values for coagulation-flocculation of biologically treated leachate using chitosan as biocoagulant for the removal of recalcitrant organic matter.…”

Section: Post-treatment Of Sanitary Landfill Leachatementioning

confidence: 99%

Chitosan for direct bioflocculation of wastewater

et al. 2019

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Coagulation/flocculation is a major phenomenon occurring during industrial and municipal water treatment to remove suspended particles. Common coagulants are metal salts, whereas flocculants are synthetic organic polymers. Those materials are appreciated for their high performance, low cost, ease of use, availability and efficiency. Nonetheless, their use has induced environmental health issues such as water pollution by metals and production of large amounts of sludges. As a consequence, alternative coagulants and flocculants, named biocoagulants and bioflocculants due to their biological origin and biodegradability, have been recently developed for water and wastewater treatment. In particular, chitosan and chitosan-based products have found applications as bioflocculants for the removal of particulate and dissolved pollutants by direct bioflocculation. Direct flocculation is done with water-soluble, ionic organic polymers without classical metalbased coagulants, thus limiting water pollution. Chitosan is a partially deacetylated polysaccharide obtained from chitin, a biopolymer extracted from shellfish sources. This polysaccharide exhibits a variety of physicochemical and functional properties resulting in numerous practical applications. Key findings show that chitosan removed more than 90% of solids and more than 95% of residual oil from palm oil mill effluents. Chitosan reduced efficiently the turbidity of agricultural wastewater and of seawater, below 0.4 NTU for the latter. 99% turbidity removal and 97% phosphate removal were observed over a wide pH range using 3-chloro-2-hydroxypropyl trimethylammonium chloride grafted onto carboxymethyl chitosan. Chitosan also removed 99% Microcystis aeruginosa cells and more than 50% of microcystins. Here, we review advantages and drawbacks of chitosan as bioflocculant. Then, we present examples in water and wastewater treatment, sludge dewatering and post-treatment of sanitary landfill leachate.

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Use of Ferric Chloride and Chitosan as Coagulant to Remove Turbidity and Color from Landfill Leachate

Cited by 13 publications

References 11 publications

Effective Chemical Coagulation Treatment Process for Cationic and Anionic Dyes Degradation

Effective Chemical Coagulation Treatment Process for Cationic and Anionic Dyes Degradation

Comparison of Four Plant-Based Bio-Coagulants Performances against Alum and Ferric Chloride in the Turbidity Improvement of Bentonite Synthetic Water

Chitosan for direct bioflocculation of wastewater

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