Ozone oxidation for the alleviation of membrane fouling by natural organic matter: A review

Abstract

Membrane fouling by natural organic matter is one of the main problems that slow down the application of membrane technology in water treatment. O(3) is able to efficiently change the physico-chemical characteristics of natural organic matter in order to reduce membrane fouling. This paper presents the state-of-the-art knowledge of the reaction mechanisms between natural organic matter and molecular O(3) or *OH radicals, together with an in-depth discussion of the interactions between natural organic matter and membranes that govern membrane fouling, inclusive the effect of O(3) oxidation on it.

Effect of TiO2 nanoparticles on structure and properties of high density polyethylene membranes prepared by thermally induced phase separation method

“…[15][16][17] Thus, increasing hydrophilicity could be a reasonable approach to mitigate fouling of the hydrophobic membranes. Many efforts have been devoted to reducing fouling in hydrophobic polymer membranes via surface modification of membranes using different methods such as graft polymerization of hydrophilic monomers, [18] plasma surface treatment, [19] ozone treatment [20] and dip-coating. [21] In surface modification, however, surface property of internal pores is barely concerned.…”

Impact of UV/persulfate pretreatment on the formation of disinfection byproducts during subsequent chlorination of natural organic matter

“…Most of the formed C-DBPs during chlorination of NOM that was preoxidized by UV/PS rose monotonically with increasing PS dosage, but the formation of N-DBPs decreased at low dosage of PS. Either preoxidation pH(4,7,9) or the presence of nitrate (0~0.5 mM) in UV/PS pretreatment processplayed little role in the formation of chlorinated DBPs. In the presence of 2.5 mg/L ammonia, UV/PS pretreatment increased most of the DBPs concerned here, but decreased the formation of TCAN and TCNM.…”

Development and application of ceramic membrane in oily wastewater treatment

“…According to the different pore size, pressure driven membrane can be divided into microfiltration (MF, average pore diameter of 0.1 ~ 10μm), ultrafiltration (UF, average pore diameter of 2 ~ 100 nm), nanofiltration (NF, average pore diameter of 0.1 ~ 2 nm) and reverse osmosis (RO, average pore size of less than 1 nm) [5] . As a new technology of rapid development, the superiorities of ceramic membrane are mainly manifested in the following aspects [6][7][8] .…”