Chemisorption of copper ions in aqueous acidic solutions by modified chitosan

Superhydrophilic and Underwater Superoleophobic Cotton Fabric for Oil–Water Separation and Removal of Heavy-Metal Ion

“… 5 − 8 Notably, oily wastewater contains other pollutants, such as organic dyes and heavy-metal ions, among which heavy-metal ions are one of the most common and harmful pollutants in water pollution. 9 , 10 Adsorption is one of the most commonly used methods to remove heavy metals because of its simple operation, easy recycling, and low cost. 9 , 11 − 13 A superhydrophilic membrane with functional groups for heavy-metal ion adsorption could simultaneously remove oil and heavy-metal ions from wastewater, which simplifies the purification process of oily wastewater containing heavy-metal ions and reduces the cost of wastewater treatment.…”

“… 9 , 10 Adsorption is one of the most commonly used methods to remove heavy metals because of its simple operation, easy recycling, and low cost. 9 , 11 − 13 A superhydrophilic membrane with functional groups for heavy-metal ion adsorption could simultaneously remove oil and heavy-metal ions from wastewater, which simplifies the purification process of oily wastewater containing heavy-metal ions and reduces the cost of wastewater treatment. 14 − 20 Wang et al 14 prepared an organic-inorganic composite membrane by the electrospinning technique modified with 3-[(trimethoxysilyl) propyl]-diethylenetriamine to obtain a superhydrophilic and underwater superhydrophobic membrane.…”

“… 3 , 8 , 21 Chitosan (CS) is a natural polymeric alkaline polysaccharide with abundant sources, degradable, and eco-friendly; it contains a large number of functional groups (such as −NH 2 and −OH, etc.) that can interact with heavy-metal ions, 9 , 22 , 23 resulting in its being widely used to treat heavy-metal wastewater by adsorption. 8 , 11 , 24 Therefore, environmentally friendly membrane materials for oil–water separation and heavy-metal ion removal can be obtained by using the CS-modified CF.…”

Analysis of Copper(II), Cobalt(II) and Iron(III) Sorption in Binary and Ternary Systems by Chitosan-Based Composite Sponges Obtained by Ice-Segregation Approach

“…Among these, adsorption is considered a simple and efficient technique to remove HMIs from wastewaters [8][9][10][11][12]. A large variety of sorbent materials, such as metal oxides/hydroxides [13,14], zeolites [15,16], commercial or synthetic activated carbon [17,18], biomass [19], synthetic organic supports [6,8,9], and unmodified or functionalized polysaccharides (chitosan, salecan, pullulan, alginate) [20][21][22][23][24][25][26][27][28][29] have been reported to remove HMIs from contaminated waters.…”

“…Lately, the employment of inexpensive and eco-friendly sorbents, such as renewable natural polymers, in the extraction and recovery of certain HMIs has drawn considerable interest [2,3,10,11,[20][21][22][23][24][25][26][27][28][29]. Amongst these low-cost sorbents, chitosan (CS) displayed promising abilities to bind different HMIs due to the presence of numerous amino and hydroxyl groups in its structure [2,20,27].…”