Adsorption of Cd (II), Cu (II), and Zn (II) from Aqueous Solution onto Nitrogen‐Functionalized Desmostachya bipinnata

Abstract

A very simple means of nitrogen functional group grafting onto the backbone ofDesmostachya bipinnatais investigated, which is a sacrificial herb in the south Asian region particular to Hindu religion. This natural biomaterial is found to be very effective for metal binding, after treatment with hydrazine monohydrate. The present study explores a comparison of amination processes by considering several options. The maximum metal loading capacities for Cd, Cu, and Zn were found to be 76.80 mg/g, 72.10 mg/g, and 58.16 mg/g, respectively. The kinetic evaluation indicated that the adsorption of Cd, Cu, and Zn onto the biomaterials followed the pseudo second-order rate equation.

Removal of heavy metals from aqueous phases using chemically modified waste Lyocell fiber

“…However, it was performed at varied pH conditions of 4, 5 and 7, for Cu(II), Pb(II) and Cd(II), respectively, to ensure that metal precipitations were avoided. All uptakes followed the usual adsorption phenomenon where sorption efficiency comparatively decreases with increasing initial concentration [9,15,[25][26][27][28][29].…”

Adsorptive capacity of polyacrylonitrile modified with triethylenetetramine for removal of copper and cadmium ions from aqueous solutions

“…These materials have some comparative advantages in contrast to common sorbent materials. Some remarkable studies can be seen in Table 1 [15][16][17][18][19][20][21][22][23][24][25]. As seen in Table 1, there are researches all over the world, work on the understanding of the mechanisms of removing copper and cadmium ions through new sorbents.…”

Carbohydrate biopolymers, lignin based adsorbents for removal of heavy metals (Cd2+, Pb2+, Zn2+) from wastewater, regeneration and reuse for spent adsorbents including latent fingerprint detection: A review

“…Due to their restricted functional sites, the adsorption of heavy metals on raw biosorbents was discovered to be less efficient. Functional groups such as carboxylate, hydroxyl, sulphate, phosphate, amide or amine have been found to be accountable for significant metal bindings on the biosorbents [ 63 ]. The intrinsic sorption property of all biosorbents is based on the concentration and configuration of effective groups on the sorbing surfaces.…”

“…Ghimire et al [ 63 ] in their work highlighted the necessity of utilizing functionalized biosorbents for the removal of heavy metals such as Cd 2+ and Zn 2+ . In their studies the functionalized biosorbents demonstrated good selectivity, and adsorption capacities.…”