Comparative assessment of water treatment using polymeric and inorganic coagulants

Manda, Innocent K.M.; Chidya, Russel; Saka, John D.K.; Biswick, Timothy

doi:10.1016/j.pce.2015.09.008

Cited by 19 publications

(9 citation statements)

References 12 publications

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“…Poly-aluminium chloride is advantageous over monomeric flocculants as it i) is more thoroughly dispersed, ii) doesn't have an impact on the clarifier, iii) forms no insoluble residues and iv) achieves better turbidity removal than alum. However, it is less effective in improving the water colour than traditional flocculants [27,28].…”

Section: B Polymeric Coagulantsmentioning

confidence: 99%

“…Most commonly used monomeric, inorganic coagulants are multivalent cations such as aluminium and iron based salts [27]. When added to water aluminium and iron salts hydrolyse and form soluble monomers and polymers.…”

Section: A Monomeric Coagulantsmentioning

confidence: 99%

“…When added to water aluminium and iron salts hydrolyse and form soluble monomers and polymers. The hydrolysed salts bind strongly with the negatively charged suspended solids and promote settling [17,27].…”

Section: A Monomeric Coagulantsmentioning

confidence: 99%

“…The flocculation mechanism must be effective to the extent that the flocs formed settle out at a satisfactory settling velocity after which the settled particles can be separated from the water in a clarifier. Coagulant aids, such as polyamines, can be added to the primary coagulant to achieve denser, more stable flocs which will settle faster [27].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Potential of Monomeric and Polymeric Coagulants in the Treatment of Raw Water used at a Coal-Fired Power Station

2017

Nov. 27-28, 2017 South Africa ASETWM-17, RCABES-17 &Amp; EBHSSS-17

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Abstract-Vast amounts of water are used to operate power stations, such as Grootvlei Power Station. It is essential for the industry to reduce the amount of surface water used due to the scarcity of water in South Africa. The raw water feed to the Grootvlei Power Station is obtained from the Lower Vaal. Surface water commonly have turbidity levels of 20 -200 NTU owing to suspended solids in the water comprising of biological material and undissolved minerals. This study investigates a variety of monomeric and polymeric coagulants and flocculants that can be used to treat the raw water feed to the Grootvlei Power Station. The mechanism of coagulation and flocculation is applicable during the treatment of raw water. The treatment of the raw water is optimized with regard to coagulant and flocculent type, dosage of coagulant and flocculent and mixing conditions. The optimum coagulant is determined as poly-aluminium chloride at 30 mg/L and the flocculent as polyamine at 0.8 mg/L. The optimum jar test conditions were determined as 60 s rapid mixing after the coagulant was added, followed by the addition of the flocculent and a further period of 30 s rapid mixing. The sample was then slowly mixed for 20 min after which it was allowed to settle.

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Section: B Polymeric Coagulantsmentioning

confidence: 99%

Section: A Monomeric Coagulantsmentioning

confidence: 99%

Section: A Monomeric Coagulantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the Potential of Monomeric and Polymeric Coagulants in the Treatment of Raw Water used at a Coal-Fired Power Station

2017

Nov. 27-28, 2017 South Africa ASETWM-17, RCABES-17 &Amp; EBHSSS-17

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“…[40,41] The porosity of scaffolds was measured according to the liquid dis placement method. [42] Before test, scaffolds were placed in a desiccator (Shanghai SuoPu Instrument Co., Ltd., China) for 2 h drying and were then put into measuring cylinders that were filled with a certain volume of ethanol. The porosity (P) of the scaffolds was calculated as follows:…”

Section: Characterization Of Scaffoldsmentioning

confidence: 99%

Controllable Aligned Nanofiber Hybrid Yarns with Enhanced Bioproperties for Tissue Engineering

Liu

Mao

et al. 2019

Macro Materials & Eng

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Electrospun nanofibers have large surface area, high porosity, and controllable orientation while conventional microfibers have appropriate mechanical properties such as stiffness, strength, and elasticity. Therefore, the combination of nanofibers and microfibers can provide building elements to engineer biomimetic scaffolds for tissue engineering. In this study, a core–shell structured fibrous structure with controllable surface topography is created by electrospinning polycaprolactone (PCL) nanofibers onto polyglycolic acid (PGA) microfibers. The surface morphology, surface wettability, and mechanical properties of the resultant core–shell structure are characterized. FE‐SEM images reveal that the orientation of PCL nanofibers on the yarn surface can be tuned by a fiber collector and rotating disks. Benefiting from the introduction of a shell of aligned PCL nanofibers on the core of PGA yarn, the uniaxially aligned PCL nanofiber–covered yarns (A‐PCLs) exhibit higher hydrophilicity, porosity, and mechanical properties than the core PGA yarns. Moreover, A‐PCLs promote the adhesion and proliferation of BALB/3T3 (mouse embryonic fibroblast cell line), and guide cell growth along the biotopographic cues of the PCL nanofibers with controllable alignment. The developed core–shell yarn having both the desired surface topography of PCL nanofibers and mechanical properties of PGA microfibers demonstrates great potential in constructing various tissue scaffolds.

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Generalities of the Coagulation-Flocculation Process: A Perspective on Biocoagulants

Loor-Moreira

Fernández-Andrade

Cedeño-Solórzano³

et al. 2021

Innovations in Biotechnology for a Sustainable Future

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Comparative assessment of water treatment using polymeric and inorganic coagulants

Cited by 19 publications

References 12 publications

Investigation of the Potential of Monomeric and Polymeric Coagulants in the Treatment of Raw Water used at a Coal-Fired Power Station

Investigation of the Potential of Monomeric and Polymeric Coagulants in the Treatment of Raw Water used at a Coal-Fired Power Station

Controllable Aligned Nanofiber Hybrid Yarns with Enhanced Bioproperties for Tissue Engineering

Generalities of the Coagulation-Flocculation Process: A Perspective on Biocoagulants

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