Facile Preparation of Novel Manganese Dioxide Modified Nanofiber and Its Uranium Adsorption Performance

Abstract

In this study a novel manganese dioxide modified nanofiber was facile prepared using the electrospinning technique. The as-prepared manganese dioxide/poly(vinyl alcohol)/poly (acrylic acid) (briefly as MnO 2 -PVA/PAA) was firstly characterized by SEM, FT-IR, XRD, stress-strain test and secondly tested as an adsorbent to remove uranium from aqueous solution. Effect of pH, ionic strength, initial uranium concentration, mixing time, temperature on the adsorption, reusability and adsorption mechanism were illustrated. The theoretical adsorption amount of MnO 2 -PVA/PAA calculated as 398.85 mg/g was competitive compared with the reported values. The study proved MnO 2 -PVA/PAA is promising in the uranium removal from aqueous medium.

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO2 and Its Adsorption for Co2+ and Ni2+

“…Good results have been achieved in adsorbing trace heavy metal ions Pb 2+ , Cu 2+ , Co 2+ , Ni 2+ , Zn 2+ , and Cd 2+ in water. 11 − 15 The adsorption properties of MnO 2 were greatly improved by calcination, doping, and modification. 16 , 17 The adsorption behavior was studied by researchers using advanced spectral analysis, a surface complexation model, and theoretical calculation; and the adsorption mechanism in aqueous solution has been well explained, usually involving ion exchange, electrostatic adsorption, hydrogen bonds, and surface complexes.…”

“…In addition, MnO 2 could be prepared into flower-like, rod-like, sea urchin-like, and other forms through different synthesis conditions. , MnO 2 had good adsorption properties due to its unique structural and morphological characteristics, high specific surface area, high porosity, abundant surface hydroxyl groups, and the large amount of surface charge. , In recent years, a large number of studies have been carried out on the application of MnO 2 in the removal of heavy metal ions. Good results have been achieved in adsorbing trace heavy metal ions Pb 2+ , Cu 2+ , Co 2+ , Ni 2+ , Zn 2+ , and Cd 2+ in water. − The adsorption properties of MnO 2 were greatly improved by calcination, doping, and modification. , The adsorption behavior was studied by researchers using advanced spectral analysis, a surface complexation model, and theoretical calculation; and the adsorption mechanism in aqueous solution has been well explained, usually involving ion exchange, electrostatic adsorption, hydrogen bonds, and surface complexes. , However, the adsorption of heavy metal ions in a metal salt solution has not been solved, the main reason being that a large number of metal ions hindered the adsorption, and there was a lack of in-depth discussion on the interaction between manganese dioxide and metal salt solution …”

Removal of Uranium from Effluent Acidic Solution Using Manganese Oxide Coated Modified Talc (MOCMT)

“…Its doping on solid support will improve its ability to separate metal ions; for example, under column testing, manganese dioxide coated zeolite was employed to remove uranium (VI), copper (II), and lead (II) [36,37]. Table 1 summaries published results on the adsorption of various cations by manganese dioxide coated onto various sorbents [38][39][40][41][42][43][44][45][46][47].…”

Study on the Adsorption Mechanism of Cobalt and Nickel in Manganese Sulfate by δ-MnO2

“…Manganese dioxide is mainly used in the field of adsorption to adsorb heavy metal ions in wastewater and alleviate the pressure of heavy metal pollution on the environment. − Wang studied the adsorption properties of heavy metals antimony and thallium. δ-MnO 2 had the best adsorption properties for Sb­(III) and Tl­(I), and its maximum adsorption capacities reached 120 and 498 mg·g –1 , respectively.…”