Triple-functional lignocellulose/chitosan/Ag@TiO2 nanocomposite membrane for simultaneous sterilization, oil/water emulsion separation, and organic pollutant removal

Polymeric Membranes for Oil-Water Separation: A Review

“…In the work of Wanli Lu and his colleagues [ 117 ], a nanofiber membrane obtained by electrospinning from deacetylated cellulose acetate, polyvinylpyrrolidone, and Fe compounds makes it possible to purify water from oil products, dyes, and chromium (VI) with an efficiency of over 99%. Multifunctional membranes are sometimes obtained by combining various natural polymers, such as lignocellulose and chitosan [ 118 ]. Such membranes can not only purify water from oil products and dyes but can also purify it from the microorganisms E. coli , S. aureus and B. subtilis with an efficiency of 99.97–99.98%, which becomes possible due to the introduction of Ag particles with antibacterial properties.…”

“…A natural polymer, chitosan, is most often used not in its pure form but only for the modification of cellulose [ 118 ] and synthetic polymers—for example, polyethylene terephthalate [ 119 ], polycaprolactone [ 120 ], polyvinylidene fluoride [ 121 ], and polysulfone [ 122 ]. Such a modification makes it possible to increase the hydrophilicity of the membranes, which means to increase their resistance to contamination in the process of separating oil-water emulsions and to increase the stability of indicators over time.…”

A direct Z-scheme heterojunction g-C3N4/α-Fe2O3 nanocomposite for enhanced polymer-containing oilfield sewage degradation under visible light

“…To tackle this, some methods have been developed to treat polymercontaining sewage, such as oxidative degradation, 7 photocatalytic degradation, 8 mechanical degradation, 9 thermal degradation, 10 and biodegradation. 11 Among them, photocatalytic degradation is considered to be a promising strategy because light energy is renewable, which can synchronously solve energy and environmental issues. [12][13][14] Thus, the development of high-efficiency photocatalysts to treat polymer-containing sewage is an urgent and important task.…”

Construction of Antibacterial, Superwetting, Catalytic, and Porous Lignocellulosic Nanofibril Composites for Wastewater Purification

“…Even worse, the multiple pollutants (e.g., organic dyes, volatile organic compounds, microorganisms, and heavy metal ions) concurrently appearing in the industrial wastewater display more severe and complicated toxicity to the ecosystem, and their diversities cause the following elimination to be more difficult and challenging. [1][2][3] Nowadays, many methods, including the adsorption, [4] photocatalytic degradation, [5] co-precipitation, [6] membrane separation, [7] and so on, have been studied for the purpose of removing the pollutants. However, most as-obtained products have the limitations, [8] such as the single pollutant target, strict and complex preparation condition, external stimulation, introduced harmful substances, high dependence on the texture of substrate, etc.…”

“…[9] Statistically, the size of global nanocellulose market approached 1 467 000 dollars in 2019, which will increase at a compound annual growth rate of 21.4% from 2020 to 2026. [4] Due to the strong interaction between the hydroxyl groups, the nanostructured cellulose has a high affinity to self-associate and form extended structures via intra-and intermolecular hydrogen bonds. [2] Besides, these hydroxy groups stemming from CNFs and CNCs are able to adsorb the charged pollutants.…”