Amino modification of biochar for enhanced adsorption of copper ions from synthetic wastewater

Preparation of amino-Fe(III) functionalized mesoporous silica for synergistic adsorption of tetracycline and copper

“…The rapid adsorption rate could be attributed to the rigid, open-pore structure as well as the large pore size of adsorbent, which increased the internal mass transfer in the adsorption process. Furthermore, the protonated amino group and Fe(III) inside the pore walls could provide abundant binding sites for Cu(II) and TC, respectively (Barbooti et al, 2014;Yang and Jiang, 2014). For the binary system, the presence of Cu(II) increased the adsorption rate of TC and enhanced the amount of absorbed TC to more than twice values in the absence of Cu(II) (Fig.…”

“…While antibiotics is poorly absorbed in the digestive tract of animals, and 50-80% of them are excreted into environment as parent compounds (Sarmah et al, 2006). Heavy metals, which are mostly acute toxic to human and wildlife even in trace level, are widely used as a growth promoter in many animal feeds and in industrial, resulting in high concentrations in some animal wastes and wastewater (Xiong et al, 2010;Yang and Jiang, 2014). The application of animal wastes and wastewater has increased their concentrations in the aquatic environments.…”

“…Among these methods, adsorption remains attractive because of its advantages of easy operation, energy savings and high removal capacity. Many adsorbents have been used to adsorb antibiotics or heavy metals from water separately, but fewer were used to remove them together (Figueroa et al, 2004;Ge et al, 2012;Ji et al, 2009;Oh et al, 2007;Sassman and Lee, 2005;Vu et al, 2010;Yang and Jiang, 2014;Hasan et al, 2013). In recent years, the cosorption of antibiotics and heavy metals from water by some adsorbents has been attracting increasing concern due to the realistic demands (Kang et al, 2010;Ling et al, 2013;Wang et al, 2008).…”

The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

“…This trend indicated that the mass transfer driving force probably increased and the rate improved with an increase in the initial concentration gradient (30,31). Other researches (32)(33)(34) have also stated the better fit of the pseudo-second-order model for data on copper ions adsorption, although they belong to adsorbents other than BSO.…”

Biochar Modification, Thermal Stability and Toxicity of Products Modification

“…4H 2 O + Modifi cation of biochar with MnO x Improvement of sorption capacity to As and Pb KMnO 4 + HCl + Preparation of composite Birnessite -Biochar HNO 3 + H 2 SO 4 (1:1) + Na 2 S 2 O 4 + Amidation of biochar (reduction of NO 2 groups to -NH 2 ), increase of sorption capacity to Cu 2+ (Yang and Jiang, 2014) Chitosan + Sorption of heavy metals and biological activity Fe 3 O 4 + Preparation of sorbents in a ball mill -sorption capacity to antibiotics (Shan et al, 2016) Legend: LO -Reference worldwide-used pharmaceutical products, such as isobrufen (Essandoh et al, 2015), tetracycline (Liao et al, 2013), acetaminophenon (Im et al, 2014), aspirin (Essandoh et al, 2015) toxic industrial substances (Chen and Chen, 2009;Wang et al, 2013), explosives (Oh and Seo, 2014;Oh and Seo, 2015) etc.…”