A multifunctional azobenzene-based polymeric adsorbent for effective water remediation

Abstract

The efficient removal of trace carcinogenic organic pollutants, such as polycyclic aromatic hydrocarbons (PAHs) and ionic dyes, from water is an important technical challenge. We report a highly effective recyclable multifunctional azobenzene (AZ)-based silica-supported polymeric adsorbent which can simultaneously remove both PAHs and anionic dyes from water to below parts per billion (ppb) level based on multiple interactions such as the hydrophobic effect, π–π stacking and electrostatic interactions, thus providing a new strategy for designer water remediation materials.

Fe3O4@C Matrix with Tailorable Adsorption Capacities for Paracetamol and Acetylsalicylic Acid: Synthesis, Characterization, and Kinetic Modeling

“…Adsorption is a well-known and efficient technique used for the elimination of pollutants, in which the adsorbent may vary from carbon nanotubes [8] and polymeric materials [25] to various oxides [26], natural clay [27], or composite materials [28]. The adsorption process usually involves multistep filtration, long waiting time, and filtration materials [24,29].…”

A multifunctional statistical copolymer vesicle for water remediation

“…1,2 The processes of industry and domestic sewage in human lives and the use of agricultural fertilizer lead to water pollution. [4][5][6][7] They have low solubility in water but are delivered through the food chain and finally harm human health. [4][5][6][7] They have low solubility in water but are delivered through the food chain and finally harm human health.…”

Dendritic amphiphile mediated porous monolith for eliminating organic micropollutants from water

“…3 A typical example is the toxic, mutagenic, carcinogenic and poorly metabolizable polycyclic aromatic hydrocarbons (PAHs), which are found highly concentrated in sh [4][5][6][7] but can barely be eliminated from water. 8 On the other hand, a hydrophilic pollutant, such as a dye, or a partly hydrophilic one, such as a surfactant, is found ubiquitously in water and has a negative impact on the ecosystem. 9,10 Some micro-and nanoscale adsorbents have been reported to efficiently capture trace water pollutants [11][12][13][14] but are too small to be separated from water, whereas a macroscopic and porous adsorbent can be readily separated from water but is usually less efficient in capturing aqueous micropollutants for the ill-dened microstructure.…”

“…Interestingly, the highly hydrophobic pyrene, a representative member of the PAH family, can be removed efficiently; uorescent detection shows a residual concentration below 1 ppb level (Table 1), which is comparable to the best results ever reported but only from a micromaterial. 8 The PS domain should be responsible for the efficient adsorption of pyrene because an acidic environment (PEI domain, if protonated, can poorly accommodate pyrene) does not disfavor the efficiency (Fig. S3, ESI †).…”