<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Abstract

BackgroundSuper-paramagnetic iron oxide nanoparticles (SPIONs) are widely used metal nanoparticles for various applications for its magnetic property and biocompatibility. In recent years, pollution of our environment especially with heavy metals in waterbodies has become a major threat and has left us very minimal sources of freshwater to drink. SPIONs or surface modified SPIONs can be used to remove these heavy metalsMethodsSPIONs were synthesized by co-precipitation method and further coated with a biopolymer, chitosan. Chromium solution was treated with the synthesized SPIONs to study the efficiency of chromium removal by surface adsorption. Later, the adsorption was analysed by direct and indirect analysis methods using UV-VIS spectrophotometry and isotherm studies.ResultsStable chitosan-coated SPIONs were synthesized and they adsorbed chromium better than the uncoated SPIONs, where it was adsorbing up to 100 ppm. Adsorption was found to be increasing with decrease in pH.ConclusionThe surface-modified SPIONs expressed cumulative adsorption action. Even after the adsorption studies, chitosan-coated SPIONs were possessing magnetic property. Thus, the surface-modified SPIONs can become an ideal nanotechnology tool to remove the chromium from groundwater.

A study on influence of superparamagnetic iron oxide nanoparticles (SPIONs) on green gram (Vigna radiata L.) and earthworm (Eudrilus eugeniae L.)

“…Using SEM, the topographical view was visualized at the magnification of 185.93 KX where the synthesized SPIONs were in the size range of 14.53 nm to 20.54 nm (figure 2). Samrot et al (2019c) showed in his earlier discussions the size of SPIONs produced using ammonia as reducing agent was around 25 nm, whereas the use of a different reducing agent in this case Cobalt chloride in NaOH did contribute to the change in size of the…”

“…Nanotechnology is a blooming field of science and has variety of applications in the field of science (Kreuter et al 2003). Applications of nanoparticles in various fields include agriculture, drug delivery (Samrot et al 2019a), imaging , Justin et al 2018, Sruthi et al 2018, Samrot et al 2018a, mosquito larvicidal activity (Samrot et al 2019b), environmental remediation (Samrot et al 2019c), bioactivity including anticancer and antibacterial activity (Samrot et al 2016, Samrot et al 2018b, Samrot et al 2019a. The increased usage creates demand in the production alleviating the risks associated with improper disposal of metal nanoparticles.…”

<p>Extraction, Purification, and Characterization of Polysaccharides of <em>Araucaria heterophylla</em> L and <em>Prosopis chilensis</em> L and Utilization of Polysaccharides in Nanocarrier Synthesis</p>

“…33 Swarming motility was performed as described before. 10 Antioxidant Assay (DPPH) DPPH solution (0.1 mg/mL) in methanol was prepared. Then, 3 mL of purified polysaccharide (different concentration) was added with 1 mL of DPPH solution.…”

“…1,2 Their surface area interaction of these nanoparticles leads to unique properties 3,4 and it can be applied in electronics, biomedicine, imaging, environmental remediation etc. [5][6][7][8][9][10] In nanobiotechnology, the recent decade has recorded extensive research on formulation of nanocarriers since they promote easy transport and availability of drug molecules to the targeted site. Nanocarriers are being formulated from both inorganic and organic resources.…”

Bio-degradation of Feathers Waste by the Staphylococcus epidermidis P3A

“…Disposal of environmental waste is becoming a significant issue across the world and it majorly polluted water sources and land [1][2][3][4] . The waste byproducts resulting from food processing are keratinous substances including animal hairs, chicken feathers, wool and horns, and vast amounts of certain byproducts are generated yearly.…”