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Organic polyelectrolytes in water treatment 1. Introduction. The main applications of organic polyelectrolytes in potable water production are in coagulation and... 2. Natural impurities in water. The impurities present in the source water can be in the form of dissolved and colloidal... 3. Polymer
Organic polyelectrolytes in water treatment - ScienceDirect
There is a focus on polymers for primary coagulation, their use as coagulant aids, in the recycling of filter backwash waters, and in sludge thickening. Practicalities of polymer use are discussed, with particular attention to polymer toxicity, and the presence of residual polymer in the final drinking water.
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Advances in the quest for substitute for synthetic organic
Relative to the metal based coagulants, the use of organic polymers, as the primary coagulant or CA in water treatment procedures, is preferred because it requires lower optimum primary coagulant dose, smaller volume of sludge generation, minimal increase in the ionic load of the treated water, reduced level of residual aluminum in treated water, overall cost savings of up to 25–30% (Rout et al., 1999, Nozaic et al., 2001).
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Advances in the quest for substitute for synthetic organic
In order to optimize the performance efficiency and reduce the process economy of coagulation-flocculation (CF) based water treatment operations, coagulant aids (CA) are used as an auxiliary to the primary coagulant. Synthetic polyelectrolytes are widely used as CA but the use are synonymous with negative human and environmental challenges.
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Organic polyelectrolytes in water treatment | John
Organic polyelectrolytes in water treatment
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Polyelectrolyte - an overview | ScienceDirect Topics
Crosslinked polyelectrolytes swell in water and work as water absorbers and are known as hydrogels or superabsorbent polymers when slightly crosslinked. Superabsorbers can absorb water up to 500 times their weight and 30–60 times their own volume (Bolto and Gregory, 2007; Dobrynin and Rubinstein, 2005).
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Organic polyelectrolytes in water treatment | Request PDF
Organic polymers have said to gain widespread use as water treatment coagulants and flocculants in a quite large number of developed countries since their introduction in the early 1950's. and in...
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Effectiveness of Natural Polyelectrolytes in Water Treatment
Nurudeen Abiola Oladoja, Advances in the quest for substitute for synthetic organic polyelectrolytes as coagulant aid in water and wastewater treatment operations, Sustainable Chemistry and Pharmacy, 10.1016/j.scp.2016.04.001, 3, (47-58), (2016).
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Organic Polyelectrolytes in Water Treatment | Adsorption
The main applications of organic polyelectrolytes in potable water production are in coagulation and occulation, and in the dewatering of treatment plant sludges. The water production processes are usually followed by sedimentation and ltration, although with only slightly contaminated waters the sedimentation step may be omitted.
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Effectiveness of Natural Polyelectrolytes in Water Treatment
Synthetic polyelectrolytes are widely used in the United States because of their effectiveness as a coagulant or coagulant aid. Synthetic polyelectrolytes produce a lower volume of sludge compared with alum flocculation, and their effectiveness is not much affected by the pH level of water.
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Reaction of chlorine with organic polyelectrolytes
These polyelectrolytes are widely used in water and wastewater treatment, and residuals discharged into drinking water or into natural water bodies could be subjected to one or more of the above
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in Water Treatment
Effectiveness of Natural Polyelectrolytes in Water Treatment Susumu Kawamura Synthetic polyelectrolytes are widely used in the United States because of their effective-ness as a coagulant or coagulant aid. Synthetic polyelectrolytes produce a lower volume of sludge compared with alum flocculation, and their effectiveness is not much affected
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Polyelectrolyte determination in drinking water
sequence of the treatment chemicals themselves e.g. organic polyelectrolytes used as coagulant aids in water treatment. The presence of residues of the un-reacted monomer in these polyelectrolyte products is a cause for concern. Historically, inorganic coagulants such as aluminium sulphate and ferric chloride have been used as coagulants/floc-
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Effectiveness of natural polyelectrolytes in water treatment
Bench- and pilot-scale tests confirmed the effectiveness of the natural polyelectrolytes, chitosan and sodium alginate, in water treatment. Chitosan performed better than synthetic polyelectrolytes, both as a coagulant aid, and as a filtration aid during direct filtration.
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Coagulation and flocculation with organic polyelectrolytes
These polyelectrolytes are widely used in water and wastewater treatment, and residuals discharged into drinking water or into natural water bodies could be subjected to one or more of the above
Get Price
Removal of Natural Organic Polyelectrolytes by Adsorption
Natural organic polyelectrolytes, such as humic and fulvic acids, were removed by adsorption onto silicate rocks. Tobermorite, zeolite, and molecular sieves 5A were used as the adsorbents. Tobermorite was more efficient by 40−50% in the removal of fulvic acids, and by 30−50% for humic acid than zeolite or molecular sieves, respectively. Humic acid removal from the solution by adsorption
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Organic Polyelectrolytes in Water Treatment | Adsorption
The main applications of organic polyelectrolytes in potable water production are in coagulation and occulation, and in the dewatering of treatment plant sludges. The water production processes are usually followed by sedimentation and ltration, although with only slightly contaminated waters the sedimentation step may be omitted.
Get Price
Effectiveness of Natural Polyelectrolytes in Water Treatment
Synthetic polyelectrolytes are widely used in the United States because of their effectiveness as a coagulant or coagulant aid. Synthetic polyelectrolytes produce a lower volume of sludge compared with alum flocculation, and their effectiveness is not much affected by the pH level of water.
Get Price
Impact of Polyelectrolytes on the Effectiveness
PDF | The article discusses effectiveness of treatment of groundwater with increased natural organic matter content with the use of organic... | Find, read and cite all the research you need on
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Polyelectrolyte determination in drinking water
sequence of the treatment chemicals themselves e.g. organic polyelectrolytes used as coagulant aids in water treatment. The presence of residues of the un-reacted monomer in these polyelectrolyte products is a cause for concern. Historically, inorganic coagulants such as aluminium sulphate and ferric chloride have been used as coagulants/floc-
Get Price
Reaction of chlorine with organic polyelectrolytes
These polyelectrolytes are widely used in water and wastewater treatment, and residuals discharged into drinking water or into natural water bodies could be subjected to one or more of the above
Get Price
Polyelectrolyte determination in drinking water | Water SA
Some of these potentially hazardous chemical contaminants are a consequence of the treatment chemicals themselves e.g. organic polyelectrolytes used as coagulant aids in water treatment. The presence of residues of the un-reacted monomer in these polyelectrolyte products is a cause for concern.
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Types of Coagulants used in Water Treatment Process
Types of coagulants used in water treatment process. 1.Aluminium coagulants. Aluminium sulphate is the most widely used aluminium coagulant. It is available in a number of solid grades such as block, kibbled or ground and is also available as a solution.
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Polyelectrolytes, Polyelectrolytes Manufacturers
Find polyelectrolytes at best price offered by polyelectrolytes manufacturers, polyelectrolytes suppliers, dealers, traders and exporters. Get information of companies selling wide range of polyelectrolytes along with latest price, moq & product details.
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Impact of Polyelectrolytes on the Effectiveness
PDF | The article discusses effectiveness of treatment of groundwater with increased natural organic matter content with the use of organic... | Find, read and cite all the research you need on
Get Price
Removal of Natural Organic Polyelectrolytes by Adsorption
Natural organic polyelectrolytes, such as humic and fulvic acids, were removed by adsorption onto silicate rocks. Tobermorite, zeolite, and molecular sieves 5A were used as the adsorbents. Tobermorite was more efficient by 40−50% in the removal of fulvic acids, and by 30−50% for humic acid than zeolite or molecular sieves, respectively. Humic acid removal from the solution by adsorption
Get Price
in Water Treatment
Effectiveness of Natural Polyelectrolytes in Water Treatment Susumu Kawamura Synthetic polyelectrolytes are widely used in the United States because of their effective-ness as a coagulant or coagulant aid. Synthetic polyelectrolytes produce a lower volume of sludge compared with alum flocculation, and their effectiveness is not much affected
Get Price
Preparation of polyelectrolytes for wastewater treatment.
Liquid-phase polymerisation of acrylamide-acrylic acid to form polyelectrolytes used in wastewater cleaning was examined using accelerated electron beam and microwave irradiation methods. Polymerisation was carried out in aqueous solutions at temperatures approximately 60 degrees C. Monomers total concentration was established at 40% (36%
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CiteSeerX — POLYELECTROLYTE DETERMINATION IN DRINKING WATER
Some of these potentially hazardous chemical contaminants may be a consequence of the treatment chemicals themselves e.g. a wide range of organic polyelectrolytes are used as coagulant aids in water treatment and the presence of residues of the unreacted monomer are a cause for concern.
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POLYELECTROLYTES are water soluble polymer carrying ionic
Polyelectrolytes can replace in part or whole, the inorganic coagulant to meet the clarity norms at much reduced amounts (At ppm levels) and thereby considerably reducing the sludge formation. Waste water treatment Domestic and industrial effluents present a variety of different types of the waste waters.
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UTILIZATION OF NATURAL POLYELECTROLYTES IN WASTEWATER
UTILIZATION OF NATURAL POLYELECTROLYTES IN WASTEWATER TREATMENT
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Potable water treatment: 4.3 Coagulation and flocculation
Polyelectrolytes (Figure 22) are long-chain organic molecules with chemical groups attached along the length of the chain, which becomes charged when the molecule is dissolved in water. The negative colloidal particles are attracted to positively charged chemical groups on the polyelectrolyte.
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