Preparation of modified Mg/Al layered double hydroxide in saccharide system and its application to remove As(V) from glucose solution

A new magnetic bio-sorbent for arsenate removal from the contaminated water: Characterization, isotherms, and kinetics

“…So, the optimum pH was found to be 6.0, since the removal percentage reached the maximum level at this pH value, given the fact that at acidic pH, LDH and Fe 3 O 4 @SiO 2 were dissolved and the structure of sorbent was destroyed. In addition, in the solution with higher pHs, the hydroxide precipitate of As (V) ions was formed and competition between OH − and As (V) ions for the adsorption on the surface of the sorbent occurred (15,38). Considering the pH-dependent behavior of AS adsorption on the synthesized sorbent, the adsorption process seemed to be controlled by different factors, such as electrostatic interactions and surface adsorption.…”

“…Therefore, different procedures, such as ion exchange, adsorption, precipitation, and membrane techniques have been studied for AS removal from aqueous solutions, among which, adsorption technique is more popular and practical, cost-effective, easy to use, which has a good efficiency (1)(2)(3). Different adsorbents have been studied for As removal, such as hydroxides and oxides of iron(III) (1,(3)(4)(5), hydroxides and oxides of aluminum (1,6), activated carbon (7), chitosan (8,9), activated alumina (10), zinc oxide (1,11), biosorbent (9,12), layered double hydroxides (LDH s ) (13)(14)(15)(16)(17)(18)(19), and magnetic Fe 3 O 4 -graphene (20). LDHs are known as inorganic compounds which have a structure similar to clays.…”

“…In addition, the modified Fe 3 O 4 @ MCM@Cu-Fe-LDH nanoparticles was synthesized for the removal of alizarin yellow in our previous study (30). LDHs have been reported as AS sorbents in some studies (13,(15)(16)(17)(18)(19)(31)(32)(33)(34). Recently, biosorbents with more compatibility have been studied and some biological materials, such as drug molecules, vitamins, peptides, and porphyrins have been intercalated to LDHs layers (24,32,33).…”

Preparation and Adsorption Properties of Soybean Dreg/Hydrocalumite Composites

“…The soybean dreg could be used as a cheap adsorption material since it contains rich oxygen-containing functional groups and has a loose and porous structure. − However, the specific surface area of the soybean dreg is small; therefore, its adsorption performance needs to be further improved. According to the previous literature, the main methods to improve the adsorption properties of biomass adsorbents included modification, carbonization, and preparation of composites. − Recently, combined with the advantages of biomass organic adsorption materials and traditional inorganic adsorption materials, the organic/inorganic composite adsorbents had attracted much attention. − For example, Abu-Danso et al found that the maximum adsorption capacities of clay/cellulose composites for Pb (II) and Cd (II) reach 389.78 and 115.96 mg·g –1 , respectively . Mirjavadi et al reported that the magnetic zeolite/cellulose nanofibers showed high adsorption capacity for the removal rate of Zn 2+ .…”