Construction of novel regenerated cellulose based foam derived from waste cigarette filters as effective oil adsorbent

Abstract

The reuse of waste cigarette filters is helpful to save resources and protect environment, and cellulose based functional materials can be applied in wastewater treatment due to the high porosity. Therefore, a novel kind of cellulose foams were fabricated by using waste cigarette filters and polyvinyl alcohol via a lyophilization technology and hydrophobicity modification in this work.As-prepared foams possessed an ultra-low density and high specific surface area (up to 40 m 2 g À1 ). After the hydrophobicity modification, the cellulose foam exhibited a water contact angle of 91.9 and 126.2 on external surface and cross section, which showed a superior oil adsorption capacity of 14 g g À1 . These developed cellulose foams have a low cost, good hydrophobicity and high adsorption capacity for oil as a promising absorbent, realizing the conversion of waste into high-value products successfully.

Recent Progresses in Adsorption Mechanism, Architectures, Electrode Materials and Applications for Advanced Electrosorption System: A Review

“…Furthermore, this group synthesized porous MXene/SWCNTs film as a CDI electrode for the removal of organic dyes in wastewater ( Figure 5 f–j), and the maximum adsorption capacity was as high as 28,403.7 mg/g when applying −2.4 V voltage [ 106 ]. In addition, our group prepared carbon foam electrodes derived from waste cigarette filters/zeolitic-imidazolate frameworks-8 (ZIF-8) composites [ 6 , 7 , 8 , 9 , 10 , 107 ], and found that the maximum electrosorption capacity of MB for these carbon foams reached to 1846.7 mg/g when applying −1.2 V voltage. Under most conditions, the adsorption time of methyl orange (MO) solution using most water treatment methods is more than 1 h. Whereas, Liu and co-workers used the holey graphene hydrogel (R-HGH) prepared by one-step hydrothermal method as the CDI electrode [ 108 ].…”

“…Globally, water pollution has become a hot topic in recent years. In order to address this issue, chemical precipitation, membrane separation, ion exchange, distillation, adsorption and other technologies have been proposed by researchers [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. In general, ordinary adsorbents have been widely used in the field of water treatment due to the simple operation process.…”