A Kinetic Study of Copper(II) Extraction using LIX84-I Impregnated Polymeric Particles with Different Structures

Preparation of Hydrophobic Cryogel Containing Hydroxyoxime Extractant and Its Extraction Properties of Cu(Ⅱ)

“…The Cu(II) concentration in the aqueous solution decreased with time and reached a constant concentration which is equilibrium concentration. The decrease in Cu(II) concentration was very fast in the initial stage of the extraction, and changed to a slower decrease at around 1000 s and reached constant value after 6000 s. This rapid copper extraction in the cryogel in the initial stages is similar to that using LIX84-I impregnated polymer particles with inter-connected spherical pores [49]. In contrast, hydrophilic crosslinked gels encapsulating fine droplets of LIX84-I and commercial microporous particles impregnated with LIX84-I resulted in slower extraction, requiring several hours or more to become constant concentration of Cu(II) [49,53].…”

“…The porous microcapsules and porous polymer particles interconnect with spherical pores on the surface and their inside, which are prepared using W/O/W emulsions as a template [7,[46][47][48]. It has been found that by using microcapsules or microparticles with interconnected spherical pores, the aqueous phase moves quickly into the microparticles, and the extraction rate of metals is very fast [49]. Cryogel, which has a structure similar to the structure of these linked spherical pores, is expected to have an excellent structure as a carrier material for extractants.…”

Preparation of Pellet Biopolymer Polyvinyl Alcohol/Alginate/Gluataraldehyde Impregnated with Banana Peel Activated Carbon (BPAC)

“…Biopolymer Pellets [8] An amount of 0,2 g of pellet biopolymer was added into the 30 mL copper (II) solution, shaking for 24h and measured using AAS. The amount of copper adsorbed into the pellet biopolymer was calculated using equation (2).…”

“…However, alginate is a water soluble compound by considering the hydrophilicity of the alginate. Therefore, alginate are cross-linked with polyvinyl alcohol (PVA) using calcium chloride (CaCl2) (Inda, et al, 2018) to increase the mechanical streangth of the pellet. Polyvinyl alcohol is a synthetic biopolymer that has biocompatibility, high elasticity and mechanical strength properties that can stabilize alginate (Xiao, et al, 2019).…”

Micro Sponge Balls: Preparation and Characterization of Sponge-like Cryogel Particles of Poly(2-hydroxyethyl methacrylate) via the Inverse Leidenfrost Effect

“…In general, porous materials are known to exhibit high porosities and large specific surface areas. , Porous structures are usually classified as follows: (a) super-macropores are up to 100 μm in diameter; (b) macropores are larger than 50 nm in diameter; (c) mesopores are in the range of 2–50 nm in diameter; and (d) micropores are smaller than 2 nm in diameter, where the pore size is engineered according to the application. Porous materials can be applied for the preparation of various functional polymers, such as scaffolds, ,− catalyst carriers, and separation and reaction media. − Although several techniques have been devised to control the porosity of polymer materials, the most commonly employed one relies on the use of porogens during polymerization, that serve as a template for the evolution of the porous region . Examples of commonly used porogens are micelles, organic solvents, organic metals, and ice crystals .…”