Adsorption of arsenic by activated charcoal coated zirconium-manganese nanocomposite: Performance and mechanism

Probing the interaction effects of metal ions in MnxFe(3−x)O4 on arsenite oxidation and adsorption

“…This is because manganese ions react with As( iii ) following eqn (6) and (7) to form Mn–O–As complexes releasing As( v ) ions into the solution. 58 2MnO 2 + H 3 AsO 3 + H 2 O → 2MnOOH* + HAsO 4 2− + 2H + 2MnOOH* + H 3 AsO 3 + 2H → 2Mn 2+ + HAsO 4 2− + 3H 2 O …”

“…The increase in As( iii ) removal with an increase in Mn concentration could also result from the formation of new adsorption sites produced during redox reaction of Mn( iv ) and As( iii ) which bind both the formed As( v ) and some of the As( iii ) in solution. 58 …”

As(III) adsorption on Fe-Mn binary oxides: Are Fe and Mn oxides synergistic or antagonistic for arsenic removal?

“…The reported binary oxides include Ce-Mn [5][6][7], Zr-Mn [8,9], Ti-Mn [10][11][12], Fe-Mn [13][14][15][16] and Al-Mn [17,18] etc. Among the series of binary oxides, Fe-Mn binary oxide, which is inexpensive and environmentally benign, has attracted much interest as a promising adsorbent for As removal, especially for As(III).…”

The Effectiveness of Activated Charcoal from Coconut Shell as The Adsorbent of Water Purification in The Laboratory Process of Chemical Engineering Universitas Ahmad Dahlan Yogyakarta

“…The material activation is the distribution of water vapor or carbon dioxide (CO2) gas to the charcoal. While the chemical activation is the immersion of charcoal in a chemical compound before it is heated, it expected that the activating agent enters between the hexagonal layers of activated charcoal and then opens a closed surface [13][14][15]. Absorption of activated charcoal is enormous, which is 25%-100% of the weight of activated charcoal.…”

“…Activated charcoal usually in the form of a fine powder, pore diameter reaches 1000A o and use in the liquid phase. The benefit serves to remove the irritating substances that cause unexpected colors and odors, freeing solvents from the disruptive materials and other uses, namely on the chemical industry and new industries [14][15][16] Activated charcoal production can conduct through the process of pyrolysis of biomass as the raw materials. According to Jamilatun et al [17] have done that activated charcoal from coconut shells.…”