A Review of the Application of Biofloccualnts in Wastewater Treatment

Agunbiade, Mayowa Oladele; Pohl, Carolina H.; Ashafa, Anofi Omotayo Tom

doi:10.15244/pjoes/61063

Cited by 41 publications

(14 citation statements)

References 62 publications

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“…The superior washing fastness properties of the colorant might be owing to the affinity of colouring component caused by hydrogen bonding and Vander Waals forces for the dyed sample. The light fastness of the dye was fairly good due to hydrogen bonding between the hydroxyl and carbonyl groups of naphthaquinone, hence shielding the chromophoric group from fading [44][45][46][47][48][49][50]. The fastness with respect to light washing and rubbing were satisfactory of dyed samples at optimized extraction conditions and the technique was ecofriendly and could be used to reduce pollution [51][52][53][54][55][56][57].…”

Section: Resultsmentioning

confidence: 99%

Statistical Modeling for the Extraction of Dye from Natural Source and Industrial Applications

Jabeen¹,

Ali²,

Nadeem³

et al. 2019

Pol. J. Environ. Stud.

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This study is intended to scrutinize the consequence of extraction conditions of Lawsonia Inermis (henna) leaves on the color strength values of dyed fabric. Extraction pH, M:L ratio, and time were optimized using central composite design (CCD) under response surface methodology (RSM). We investigated how the maximum colour strength values were obtained at pH 6.64 in about 78 minutes extraction with an M:L ratio of 1:44. ANOVA results showed that all the extraction parameters significantly affect the colour strength values of dyed samples. 99% variation in the response was indicated in the 2 nd-order regression equation for K/S. The fastness properties with respect to light, washing, and rubbing were quite satisfactory of dyed samples under optimized extraction conditions.

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Section: Resultsmentioning

confidence: 99%

Statistical Modeling for the Extraction of Dye from Natural Source and Industrial Applications

Jabeen¹,

Ali²,

Nadeem³

et al. 2019

Pol. J. Environ. Stud.

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“…The coagulation-flocculation process is affected by the type of coagulant, pH, coagulant dosage, flocculant dosage, mixing speed and time for fast and slow mixing in jar test, and the characteristics of wastewater [9]. Moreover, coagulation-flocculation process has been widely employed for potable water and wastewater treatment as a reliable and convenient technique to overcome the forces of stabilizing suspended particles and facilitating the collection and formation of flocs [10][11].…”

Section: Introductionmentioning

confidence: 99%

Response Surface Analysis for Sewage Wastewater Treatment Using Natural Coagulants

Joaquin¹,

Gnanasundaram²,

Kanakasabai³

2021

Pol. J. Environ. Stud.

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The studies on utilization of natural coagulants prepared from seeds of Citrullus lanatus (watermelon) and Cucumis melo (cantaloupe) provide insight on sewage wastewater treatment. The results were statistically analyzed by response surface methodology (RSM) based central composite design (CCD), and supported with results from Fourier Transform Infrared (FTIR) spectroscopy for functional groups present in coagulants. The batch coagulation studies were performed varying process parameters such as pH (5-7) and coagulant dosage (50-150 mg/L) at constant flocculant dosage of 10 mg/L using jar test. In jar test, coagulation was carried out with fast mixing (Mixing at 150 rpm for 1 min) followed by slow mixing (Mixing at 50 rpm for 30 min), and the final mixture was allowed to settle for 1 h at the temperature of 30±2ºC. Design-Expert® version 12 software was used to optimize pH and coagulant dosage for effective sewage wastewater treatment using natural coagulants with the objectives to maximize percentage reduction in turbidity, biological/biochemical oxygen demand (BOD), total suspended solids (TSS), and chemical oxygen demand (COD). The RSM results reveal that the optimum C. lanatus coagulant dosage of 72.3 mg/L at pH 5 achieved maximum efficacy removal of TSS and BOD by 92.8% and 92.1% respectively. The FTIR results show that the coagulants from plant seeds contain almost similar functional groups. Thus, it can be concluded that the coagulant prepared from C. lanatus would be more effective for treatment of sewage wastewater.

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“…The high solubility of these toxic dyes in water and the environmental pollution caused by them makes these dyes harmful to the health of aquatic life, humans, and other mammals [24,25]. Therefore, the application of economical and eco-friendly separation techniques—specifically, coagulation/flocculation for water recovery—is essential to a pollution-free environment [26,27,28,29]. In this context, one of the candidate materials is lignosulfonate, which can be properly chemically functionalized and used as an anionic polymeric coagulant for dye removal.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Coagulation Performance of Carboxypropylated and Carboxypentylated Lignosulfonates for Dye Removal

Bahrpaima

Fatehi

2019

Biomolecules

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In this work, 1-carboxypropyled (1-CPRLS) and 5-carboxypentyled lignosulfonates (5-CPELS) were synthesized using 2-chlorobutanoic acid and 6-chlorohexanoic acid as carboxylate group donors via SN1 and SN2 mechanisms, respectively. 1-Carboxypropyl and 5-carboxypentyl lignosulfonates with the charge densities of −3.45 and −2.94 meq g−1 and molecular weights of 87,900 and 42,400 g·mol−1 were produced, respectively, under mild conditions. The carboxylate content and degree of substitution (DS) of the 1-CPRLS product were 2.37 mmol·g−1 and 0.70 mol·mol−1, while those of 5-CPELS products were 2.13 mmol·g−1 and 0.66 mol·mol−1, respectively. The grafting of carboxypropyl and carboxypentyl groups to lignosulfonate was confirmed by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (1H-NMR and 13C-NMR) spectroscopies. In addition, 1-CPRLS and 5-CPELS were applied as coagulants for removing ethyl violet (EV) dye from a simulated solution, and their performance was related to their charge densities and molecular weights. Furthermore, fundamental discussion is provided on the advantages of (1) producing 1-CPRLS and (2) the superior properties and performance of 1-CPRLS to carboxyethylated lignosulfonate.

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A Review of the Application of Biofloccualnts in Wastewater Treatment

Cited by 41 publications

References 62 publications

Statistical Modeling for the Extraction of Dye from Natural Source and Industrial Applications

Statistical Modeling for the Extraction of Dye from Natural Source and Industrial Applications

Response Surface Analysis for Sewage Wastewater Treatment Using Natural Coagulants

Preparation and Coagulation Performance of Carboxypropylated and Carboxypentylated Lignosulfonates for Dye Removal

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