Reverse Osmosis
Reverse Osmosis
(OP)
I am kind of a novice in the field of water treatment. I am wokring in the field of hazardous waste and has a client who has a question regarding reverse osmosis process. Apparently, he is acquiring some interests in some wells, the water from which is being subjected to reverse osmosis treatment. Where can I find more information on this process? Is it like a state-of-the art method of treating drinking water? I have heard of granular activated carbon, but not reverse osmosis. Can someone please enlighten me on this process. Thanks.





RE: Reverse Osmosis
Hope this helps.
saxon
RE: Reverse Osmosis
http://www.watertreatmentguide.com/
http://www.membranes.com/
http://www.eawater.com/html/drh2o/ro.htm
Regards
Nosey
RE: Reverse Osmosis
there are two sides seperated by a semipermeable membrane, one with solvent and one with pure solvent. A pressure greater than the osmotic pressure (osmotic pressure is the pressure required to stop the flow of solvent) is applied to the solution side of the semipermeable membrane. This application of pressure increase the rate at which solvent molecules leave the solution and thus reverses the flow of solvent, forcing it to flow from solution to pure solvent. I think it's due to Le Chatelier's principle, by applying a pressure you reverse the reaction.
RE: Reverse Osmosis
Membrane engineering Forum (Forum136)
RE: Reverse Osmosis
Almost all RO membranes are made polymers, cellulosic acetate and matic polyamide types rated at 96%-99+% NaCl rejection. RO membranes are generally of two types , asymmetric or skinned membranes and thin film composite (TFC) membranes. The support material is commonly polysulfones while the thin film is made from various types of polyamines, polyureas etc.
RO membranes have the smallest pore structure, with pore diameter ranging from approximately 5-15 A0 (0.5 nm - 1.5 nm). The extremely small size of RO pores allows only the smallest organic molecules and unchanged solutes to pass through the semi-permeable membrane along with the water. Greater than 95-99% of inorganic salts and charged organics will also be rejected by the membrane due to charge repulsion established at the membrane surface.