Joule-heating electrospun reduced-graphene oxide nanoribbon-coated reusable polymeric sorbent with an excellent sorption/desorption of high-viscosity oils

Highly Efficient Separation for Aqueous Viscous Oils Enabled by a Wood-Based Cellulose Aerogel with a Superhydrophilic Protonated Coating

“…One strategy is to reduce the oil viscosity by heating up to increase fluidity. 13,21,22 For example, Huang et al proposed a reduced graphene oxide-coated wood sponge (F-rGO@WS) modified by fluoroalkyl silane, which utilized the electrothermal capacity of rGO to improve crude oil flow. 23 Chao et al made a wood sponge decorated with rGO that utilized a photothermal effect to rapidly reduce viscosity, reaching temperatures as high as 88 °C in 100 s. 24 Nevertheless, the electrothermal conversion requires an additional power supply, which is unreliable in complex marine environments, and the photothermal effect may not be effective in poor lighting conditions.…”

“…However, the chemical industry generated a lot of high-viscosity oil pollutants, and most of the published literature had few research studies on the separation of high-viscosity oil (>300 mPa·s) and water, especially crude oil/water, which was always seriously contaminated with materials due to its extremely strong adhesion, making the separation difficult. − In recent years, some advanced adsorbent materials and membrane materials have gradually appeared for the separation of high-viscosity crude oil and water. − According to our survey, there are two main treatment strategies. One strategy is to reduce the oil viscosity by heating up to increase fluidity. ,, For example, Huang et al proposed a reduced graphene oxide-coated wood sponge (F-rGO@WS) modified by fluoroalkyl silane, which utilized the electrothermal capacity of rGO to improve crude oil flow . Chao et al made a wood sponge decorated with rGO that utilized a photothermal effect to rapidly reduce viscosity, reaching temperatures as high as 88 °C in 100 s .…”

Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

“…As global industries expand rapidly, the severity of water pollution is escalating. , Among various pollutants, water-insoluble oils and water-soluble organic dyes are viewed as the primary contaminants in wastewater, posing significant threats to both the environment and human health. − So far, numerous technologies, including adsorption, − photocatalysis, − chemical oxidation, , biological methods, ion exchange, and membrane separation − have been undertaken to address oil–water separation and dye removal from wastewater. Noteworthily, owing to the increasing complexity of wastewater, traditional single-treatment technology has become inadequate for meeting current demands. − Fortunately, membrane adsorption–separation technology has recently emerged as an effective method for treating complex wastewater containing oil and dyes. − This method combines the benefits of adsorption and membrane separation, providing advantages like simple operation, low energy usage, and high efficiency. ,, Based on this, numerous membranes have been developed with special wettability, particularly superhydrophilic and underwater superoleophobic features, along with abundant adsorption sites for simultaneously removing dyes and separating oil–water mixtures. ,− However, the majority of these adsorption–separation membranes are made from nonrenewable resources and are nonbiodegradable, potentially causing secondary environmental pollution after their service life .…”