Cr(vi) adsorption from aqueous solution by an agricultural waste based carbon

Abstract

The study examined the adsorption of hexavalent chromium [Cr(vi)] from aqueous solution by acidically prepared rice husk carbon (APRHC).

Facile synthesis of tea waste/Fe3O4nanoparticle composite for hexavalent chromium removal from aqueous solution

“…The maximum adsorption capacity of Cr(VI) by the TW/Fe 3 O 4 composite was 75.76 mg g À1 . The maximum adsorption capacity of the TW/Fe 3 O 4 composite is much higher than that of most adsorbents reported in the literature, 5 and thus it can be applied as a highly efficient adsorbent to remove trace Cr(VI) from aqueous solution. The Langmuir constant (b) was in the range of 0-1, indicating that the TW/Fe 3 O 4 composite had a good potential to remove Cr(VI).…”

“…The samples were collected at interval times from 0 to 600 min. The adsorption amount was calculated according to formula (5). The kinetic temperature was set at 25 C, 35 C and 45 C. The initial concentrations of Cr(VI) were 10 mg L À1 , 30 mg L À1 , and 50 mg L À1 .…”

“…Currently, adsorbents derived from biomass or modied biomass have drawn great attention. [5][6][7][8] With the development of the tea industry, the amount of tea waste has also increased. Tea waste could act as a good absorbent for heavy metal removal from wastewater because of its abundant organic functional groups and cellulose-based pore structure.…”

Efficient Removal of Cr(VI) from Aqueous Solution on the Hierarchical Porous N-Doped Carbon Derived from Soft Wood

“…[2,17] Recent years, adsorption method has drawn much attention for its easy operation, wide availability, and high efficiency. [28] Carbon material, especially derived from the low-cost, easily available and renewable biomass such as rice husk, [11] sugarcane bagasse [6] and pineapple-peel, [27] offers potential advantages over traditional adsorption materials in eco-friendly property, large adsorption capacity and stability. It can even be a good substitution of commercial activated carbon with high adsorption capacity.…”

Adsorption capability of heavy metals by chitosan/poly(ethylene oxide)/activated carbon electrospun nanofibrous membrane

“…High efficiency, low cost, and wide applicability of adsorption process made it most welcomed method across the world . Until now, researchers proposed various adsorbents like untreated plant waste, such as peanut hulls, rice husks, coconut shell, papaya wood, and nanoparticles like activated carbon (AC), carbon nanotube and graphene oxide, polymer cast films, and so on . However, such adsorbents are undesirable due to their complex separation process after adsorption process, high cost, and poor reusability .…”