A new insight on the adsorption mechanism of amino-functionalized nano-Fe3O4 magnetic polymers in Cu(II), Cr(VI) co-existing water system

Copper adsorption onto synthesized nitrilotriacetic acid functionalized Fe3O4 nanoparticles: kinetic, equilibrium and thermodynamic studies

“…Discharge of Cu 12 (II) ions into waste water from different industrial process such as 13 electroplating, paint, metal finishing, mining operations, chemical 14 manufacturing, fertilizers and pigment industries have potential 15 health hazard for human and aquatic ecosystem [5]. Although 16 copper is essential micronutrient for animals and takes part as a 17 cofactor in many metalloproteins and as an activator of some 18 enzyme systems [6]. However, ingestion of excess concentration of 19 Cu(II) causes hepatic and renal damage genetic disorder and it may 20 also causes nausea, vomiting, diarrhoea etc.…”

Effective parameters for the adsorption of chromium(III) onto iron oxide magnetic nanoparticle

“…Many studies have been carried out showing the high efficiency of magnetic nanoparticles in removing different pollutants, especially heavy metals, from water and wastewater, including oil refinery wastewater treatment using zero-valent iron nanoparticles by ultrasound (Rasheed et al 2011); paper mill wastewater treatment by iron oxide covered with polyacrylic acid for the purpose of chemical oxygen demand (COD) removal (Zhang et al 2011); application of Fe 3 O 4 magnetic nanoparticles for color removal from water (Absalan et al 2011;Iram et al 2010); methylene blue removal from aquatic environment by Fe 3 O 4 nanoparticles fixed with pectin (Rakhshaee and Panahandeh 2011); reduction of polybrominated diphenyl ethers (PBDE) by metal nanoparticles (Fang et al 2011a); adsorption of cadmium from aquatic environment by magnetic nanoparticles and its restoration from industrial wastewater by magnetic particles (Chen et al 2011;Tu et al 2012); copper and chromium(VI) adsorption from aquatic environment by iron oxide magnetic nanoparticles with amino factor groups (Shen et al 2012); chromium(VI) removal from electroplating wastewater by metal nanoparticles (Fang et al 2011b); iron nanoparticles fixed with pectin to remove color from aquatic solution (Rakhshaee 2011); reduction of decabromodiphenyl ether by zero-valent iron nanoparticles fixed within mesoporous of silica microspheres (Qiu et al 2011); adsorption of arsenite onto the Fe 2 O 3 nanoparticles and arsenic removal from water by Fe 3 O 4 nanoparticles (Akin et al 2012;Prasad et al 2011); application of Fe 3 O 4 magnetic nanoparticles with functional groups of carboxyl, amine, and thiol in removing Escherichia coli and toxic metals ions (Singh et al 2011); using bakery yeast along with Fe 3 O 4 nanoparticles to remove methyl violet from aquatic environment (Tian et al 2010); lead removal from aqueous solution by magnetic nanoparticles (Tan et al 2012); removal of heavy metal ions from aquatic environment using Fe 3 O 4 magnetic nanoparticles reformed by polymer (Ge et al 2012); removing ions of nickel, cadmium, and lead from water by Fe 3 O 4 nanoparticles reformed by carboxymethyl-b-cyclodextrin (Badruddoza et al 2013); treatment of wastewater by Fe 3 O 4 nanoparticles (Shen et al 2009);and Pb(II) removal from wastewater by magnetic nanoparticles of iron oxide (Nassar 2010).…”

Study on adsorption of Cu(II)–Cr(VI) binary system by carbonized Eupatorium adenophorum

“…5, before the adsorption by carbonized Eupatorium adenophorum, the alkyne C−H bonds have a stretching vibration absorption peak around 3300 cm −1 and multiple bending vibration peaks within 600~700 cm Those results illustrate that there is no obvious change for functional groups before and after the adsorption towards Cu(II) and Cr(VI), indicating that physical adsorption is likely to dominate this adsorption process. [39] As shown in the above, Fig. 6(a) and (a) are the scanning electron microscope (SEM) images of carbonized Eupatorium adenophorum before and after the adsorption, and are magnified by 1000 times.…”