Polyethyleneimine-bacterial cellulose bioadsorbent for effective removal of copper and lead ions from aqueous solution

Biofabrication of a novel bacteria/bacterial cellulose composite for improved adsorption capacity

“…It is noticed that although the maximum adsorption capacity of BA/BC (ca. 52 mg g −1 ) is comparable to the carboxymethylated BC [28], it is lower than some adsorbents using BA and other BC-based materials, as presented in Table S2 [28,[31][32][33][34][35], which is simply due to the lack of surface functionalization as mentioned above.…”

“…As expected, the adsorption capacities show a rapid initial increase in the first 60 min and then reach equilibrium. This is a common pattern for many adsorbents towards various metal ions [32], which is explained by the limitation of available active sites on the surface of adsorbents.…”

“…There are a large number of hydroxyl groups on BC, which dominate the electrostatic interaction with metal ions. However, its weak activity results in low adsorption capacities to various metal ions [32,36]. This can elucidate the low adsorption capacities of BC.…”

Simultaneous capture of methyl orange and chromium(vi) from complex wastewater using polyethylenimine cation decorated magnetic carbon nanotubes as a recyclable adsorbent

“…Polyethylenimine (PEI), a highly water-soluble polyamine, has gained considerable attention in the eld of wastewater remediation owing to the high affinity of its high-density of amine groups on the molecular backbone towards hydrophilic pollutants. [34][35][36] Several studies have reported that heavy metal ions can be easily adsorbed by these nitrogen containing moieties through chelation, 37,38 and anionic dyes could also be selectively attracted through electrostatic attraction. [39][40][41] Therefore, based on such a hypothesis that hybrids consisting of PEI and magnetic CNTs combine their unique magnetic response, extremely ideal adsorption capability and hydrophilicity, as well as high specic surface area, we are committed to explore PEI decorated magnetic multiwalled carbon nanotubes (denoted as MWCNTs@Fe 3 O 4 /PEI) adsorbents integrating excellent uptake performance, rapid magnetic recovery, pH-sensitivity and reusability for the treatment of complex wastewater.…”

Adsorption of Heavy Metal Ions by Oil Palm Decanter Cake Activated Carbon

“…The rapid expansion of heavy metal-related industries, such as the electroplating, mining, smelting, battery manufacture, tanneries, paint, pesticides, printing, and photography industries, has caused serious environmental problems due to the incomplete treatment of wastes containing heavy metals [1]. In Peninsular Malaysia, the electronics and semiconductor industries produce a significant amount of sludge containing heavy metals.…”