Arsenic(III) Removal by Nanostructured Dialdehyde Cellulose–Cysteine Microscale and Nanoscale Fibers

Abstract

Arsenite (As(III)) contamination in drinking water has become a worldwide problem in recent years, which leads to development of various As(III) remediation approaches. In this study, two biomass-based nanostructured materials, microscale dialdehyde cellulose–cysteine (MDAC–cys) and nanoscale dialdehyde cellulose–cysteine (NDAC–cys) fibers, have been prepared from wood pulp. Their As(III) removal efficiencies and mechanism were determined by combined adsorption, atomic fluorescence spectrometry, microscopy (scanning electron microscopy, transmission electron microscopy, and atomic force microscopy), and spectroscopy (Fourier transform infrared, 13C CPMAS NMR) methods. The adsorption results of these materials could be well described by the Freundlich isotherm model, where the maximum adsorption capacities estimated by the Langmuir isotherm model were 344.82 mg/g for MDAC–cys and 357.14 mg/g for NDAC–cys, respectively. Both MDAC–cys and NDAC–cys materials were further characterized by X-ray diffraction and thermogravimetric analysis, where the results indicated that the thiol groups (the S content in MDAC–cys was 12.70 and NDAC–cys was 17.15%) on cysteine were primarily responsible for the adsorption process. The nanostructured MDAC–cys system appeared to be more suitable for practical applications because of its high cost-effectiveness.

Nanofiltration for Arsenic Removal: Challenges, Recent Developments, and Perspectives

“…Many sustainable and naturally abundant materials including waste rice husk [ 23 ]; iron-based adsorbents such as iron oxy-hydroxides including akaganeite (β-FeOOH), goethite (α-FeOOH), lepidocrocite (γ-FeOOH), ferrihydrites (Fe 10 O 14 (OH) 2 ), iron-based layered double hydroxides (LDHs), iron oxy-hydroxides doped activated carbon, and iron oxy-hydroxides doped graphene oxide [ 24 , 25 ]; and activated carbon [ 26 ] have been examined as efficient adsorbents for As removal. Recently, some novel materials including cellulose-based fibers [ 27 , 28 ], metal organic framework (MOF) [ 29 ], and hydrogel [ 30 ] have also been explored. Several of these As removal materials and techniques have also been implemented practically in the affected rural areas.…”

The Construction of a Hydrophilic Inorganic Layer Enables Mechanochemically Robust Super Antifouling UHMWPE Composite Membrane Surfaces

“…The membranes were cut into regular shapes and immersed in BSA solution (0.5 g/L, pH 7.4). After the adsorption-desorption reached equilibrium for 12 h at room temperature, the concentrations of BSA solution before and after adsorption were measured via a UV-spectrophotometer (UV-9100 D, LabTech, Beijing, China) and the adsorption mass was calculated using Equation (3).…”

“…Currently, with the growing concerns of the worldwide increasing water crisis, numerous researchers are working on the problem. Separation membranes with efficient separation efficiency and excellent antifouling properties have been the key focus technology due to the advantages of reliability, safety, and energy saving [1][2][3][4][5][6]. According to our previous study, an extremely higher water flux, ultra-high-molecular-weight polyethylene (UHMWPE)/fabric composite membrane was succeed fabricated by the composition between UHMWPE and pretreated woven fabric [7]; after the composition, the UHMWPE's sponge-like non-through pore structure became penetrated, and the porosity and water flux had increased significantly.…”

Preparation of Carboxymethyl Cellulose-g- Poly(acrylamide)/Attapulgite Porous Monolith With an Eco-Friendly Pickering-MIPE Template for Ce(III) and Gd(III) Adsorption

“…Once all the adsorption sites of the adsorbent were completely occupied by metals ions, adsorption equilibrium was reached. The adsorption process was simulated by the Langmuir (Equation 4) and Freundlich (Equation 5) isotherm models (Mittal et al, 2010;Chen et al, 2019). The respective equations are as follows.…”