Chemical and photolytic degradation of polyacrylamides used in potable water treatment
In potable water treatment processes, polyacrylamides are often exposed to oxidants (e.g. chlorine and permanganate) and UV irradiation from sunlight or artificial sources. The purpose of this study is to evaluate the possible degradation of
nonionic polyacrylamide｜non-ionic polyacrylamide/NPAM 1. Product characteristics Nonionic polyacrylamide is a high polymer with high molecular weight and low ion exponent ,which has function of floculation 、dispersal、thickening、bonding、film
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Using coagulation–flocculation to harvest Chlamydomonas reinhardtii: Coagulant and flocculant efficiencies, and reuse of the liquid phase as
A UV–VIS spectrophotometer (model DR 3900, Hach Lange, United Kingdom) was used to measure optical density of the culture media at 680 nm (OD 680). These measurements were combined with cuvette tests from Hach Lange to measure ammonium (LCK
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Rheological investigation showed that the polyacrylamide and polyacrylamide/laponite suspensions displayed non-Newtonian behavior in almost the whole range of shear rate. At low shear rates, the
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Cationic, anionic, nonionic, and zwitterionic acrylamide polymers and copolymers can be synthesized as desired. Anionic PAM is the most widely used reducer with excellent DR performance and low cost for hydraulic fracturing of shale gas
- What is polyacrylamide (PAM) used for?
- npj Clean Water 1, Article number: 17 ( 2018 ) Cite this article High molecular weight (10 6 –3 × 10 7 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.
- Why is polyacrylamide used in water treatment?
- With the increasing global water scarcity and escalating environmental pollution, efficient water treatment has become paramount. Polyacrylamide, as a versatile polymer compound, has demonstrated significant achievements in the field of water treatment. PAM is widely used as a coagulant and flocculant in wastewater treatment.
- Are cationic polyacrylamide copolymers bad for the environment?
- Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils.
- Can polyacrylamide be bioremediated?
- Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently needed.
