Glutaraldehyde cross-linked epoxyaminated chitosan as an adsorbent for the removal and recovery of copper(II) from aqueous media

Removal of cadmium from aqueous solution using low molecular weight chitosan derivative

“…The sorbent had a mass loss of 12.16% during the first stage of weight loss and a maximum weight loss of 57.13% during the second stage of weight loss. This shows that the prepared sorbent was thermally steady over a temperature up to 600 • C (Anirudhan & Rijith, 2009;Sivakami et al, 2013). From the DSC curve, the endothermic peaks were 79.9 and 564.1 • C. The endothermic peak at 79.9 • C is ascribed to the removal of absorbed water from the sorbent.…”

“…Decomposition of cross-linked low molecular weight chitosan pyruvic acid derivative is expected to happen after 564.1 • C as shown in the TG/DSC studies. The product had high decomposition temperature because it was thermally stable, and high temperature was required for decomposition (Anirudhan & Rijith, 2009;Cestari, Vieira, Matos, & dos Anjos, 2005;Miranda et al, 2006;Mourya, Inamdar, & Tiwari, 2010). Fig.…”

Eco-friendly and cost-effective superabsorbent sodium polyacrylate composites for environmental remediation

“…Heavy metals are recognized as one of the most harmful pollutants in the environment, due to their detrimental effects on aquatic environments and human beings, such as high toxicity, bioaccumulation, and non-degradability [1][2][3]. Common sources of heavy metal pollution are mainly mining and industrial activities such as petroleum refining, paints and pigments, pesticide production, chemical manufacturing, mining and smelting activities, and electroplating [1,4].…”

“…Common sources of heavy metal pollution are mainly mining and industrial activities such as petroleum refining, paints and pigments, pesticide production, chemical manufacturing, mining and smelting activities, and electroplating [1,4]. Common methods for removal of heavy metal ions from wastewater include coagulation, precipitation, ion exchange, filtration, adsorption, electrodeposition, and flotation [3,[5][6][7][8].…”

Removal of Cu2+ from wastewater by modified xanthan gum (XG) with ethylenediamine (EDA)

“…10 In addition, to enhance the adsorption capacity of heavy metals, different types of functional groups have been introduced into raw adsorbent materials. T. S. Anirudhan et al 11 found that the binding capacity of chitosan for Cu evidently increased by synthesizing glutaraldehyde crosslinked epoxyaminated chitosan due to the introduction of abundant amide and hydroxyl groups. E. Pehlivan et al.12 synthesized a potential bio-sorbent by modifying barley straw with citric acid, which resulted in a significant increase in the uptake amount of copper because of the enhanced chelation of copper with sufficient carboxyl groups from citric acid.…”