Rov qab osmosis, los yog thim rov qab osmosis, qhov siab sib txawv raws li kev tsav tsheb, ntawm qhov kev sib cais ntawm kev sib cais ntawm qhov sib cais sib cais ua haujlwm. Siab raug siv rau cov khoom siv ntawm daim nyias nyias sab, thiab thaum twg qhov siab tshaj qhov siab osmotic, qhov hnyav yuav rov qab rau sab kev coj ntawm lub ntuj tso cai. Yog li ntawd cov kab uas tau muaj zog, piv txwv li, cov kua muaj dej khov, yog ua rau ntawm lub siab tsis zoo ntawm daim nyias nyias; thiab siv cov tshuaj kua txig, piv txwv li, cov kua dej ua kom zoo, tau ntawm kev siab sab. Yog hais tias tus dej hiav txwv yog kho nrog osmosis rov qab, dej tshiab tau ntawm lub siab uas tsis muaj siab ntawm membrane thiab brine tau ntawm kev siab sab.
Rov qab osmosis feem ntau siv asymmetric membranes thiab cov membrane composite. Cov khoom siv rov qab siv osmosis siv, feem ntau cov khoob khoob khoob los yog cov khoom siv yob sib cais.
Rov qab osmosis membrane yuav khaws cia rau hauv cov dej ntawm ntau cov pob txha uas tsis muaj zog, colloidal thiab macromolecules solute, thiaj li tau cov dej ntshiab. Nws kuj tseem siv tau rau preconcentration ntawm macromolecule organic solutions. Vim tias txoj kev rov qab osmosis yog yooj yim thiab tsis muaj zog, nws tau siv rau hauv seawater thiab brackish water (saib brine) dej kom zoo, kho dej hauv dej thiab kho cov dej khib nyiab, thiab tag nrho nrog ion pauv los tsim cov dej purity siab, nws daim ntawv thov yog expanding Pib siv los siv rau cov khoom noj siv mis, kua txiv hmab txiv ntoo thiab biochemical thiab lom neeg ua haujlwm hauv kev sib cais thiab cov concentration.
