SYNTHETIC POLYAMPHOLYTE HYDROGELS BASED ON VARIOUS ALIPHATIC DIAMINS FOR REMOVING DYES FROM AQUEOUS SOLUTIONS

Magnetic Nanocomposites as Efficient Sorption Materials for Removing Dyes from Aqueous Solutions.

Magnetic composite sorbents based on saponite clays with different content of magnetite (2-7 wt%.) were synthesized. The samples were analyzed by X-ray diffraction methods, and it was found that the Fe3O4 in composites is in the nanorange. It has been shown that the magnetic nanocomposites have more developed microporosity and mesoporosity compared to saponite clay. The sorption properties of m...

Removal of perilous dyes from aqueous solutions with CuO adsorbent

Preparation and Characterization of Amphoteric Cellulose Hydrogels as Adsorbents for the Anionic Dyes in Aqueous Solutions

A series of cellulose ampholytes (CAms), with substitution degrees of cationic groups (DSC) of 0.41, 0.79, and 1.08, and with a substitution degree of anionic groups of 0.68, was prepared from sodium carboxymethylcellulose by a cationization reaction with 2,3-epoxypropyltrimethylammonium chloride. The obtained CAms were crosslinked by ethyleneglycoldiglycidylether (EGDE) to obtain cellulose pol...

Removing Phosphorus from Aqueous Solutions Using Lanthanum Modified Pine Needles

The renewable pine needles was used as an adsorbent to remove phosphorus from aqueous solutions. Using batch experiments, pine needles pretreated with alkali-isopropanol (AI) failed to effectively remove phosphorus, while pine needles modified with lanthanum hydroxide (LH) showed relatively high removal efficiency. LH pine needles were effective at a wide pH ranges, with the highest removal eff...

ADSORPTION BEHAVIOR OF Cd, Pb, AND Ni FROM AQUEOUS SOLUTIONS ON CELLULOSE-BASED HYDROGELS

Removal of Cd 2+ , Pb 2+ , and Ni 2+ from aqueous solutions using cellulosegraft-acrylic acid (C-g-AA) hydrogels was investigated. Various factors affecting the adsorption capacity, such as pH, time, initial ions concentration, and competitive ions, were tested. The results showed that the adsorption of hydrogels was very pH dependent, and maximum adsorption was obtained at a pH of 5.0. The ads...