Tryptamine and CMC-Na modified gel for Fe3+ adsorption in water

In this work, an efficient Fe 3+ adsorbent was synthesized by using the tryptamine and sodium carboxymethyl cellulose (CMC-Na) modified polyacrylamide gel. The functional monomers synthesized by the reaction of tryptamine and methacrylic acid chloride were doped into the composition, and CMC-Na participated in the formation of the gel network. By changing different conditions, the optimal use conditions of the gel were explored. The Langmuir and Freundlich isotherm models were used to discuss the adsorption behavior. According to the fitting results, the Freundlich model was more suitable for explaining the adsorption of Fe 3+ by gels. The feasibility of its adsorption process was confirmed by the study of its kinetics and thermodynamics. As an adsorbent, tryptamine CMC-Na modified polyacrylamide gel has excellent ability to remove Fe 3+ from aqueous solutions. The maximum adsorption capacity of tryptamine and CMC-Na modified polyacrylamide gel for Fe 3+ reached 127.5 mg g −1 .