Removal mechanism of phosphate from aqueous solution by fly ash

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

“…The polarities and water solubilities of the pollutants, fly ash particle sizes and its unburned carbon content, as well as pH of the media are specified as the main factors with significant effect on the adsorption processes [184,[258][259][260][263][264][265][267][268][269]. Depending on the balance between the composition on metal oxides or the residual carbon content, adsorption of polar or mostly non-polar molecules, respectively, may be favored.…”

Opportunities and challenges in the use of coal fly ash for soil improvements – A review

“…Certain industrial waste products may have potential as inexpensive metal and pesticides sorbents (Bailey et al, 1999;Gupta et al, 2002;Babel and Kurniawan, 2003;Lu et al, 2005;Karatas, 2012;. Activated charcoal is the most commonly used sorbent for removing pesticide residue from contaminated waters (Jiang et al, 2006;Lopez-Ramon et al, 2007).…”

“…Many reports have highlighted the pesticide sorption potential of CFA (e.g., Konstantinou and Albanis, 2000;Majumdar and Singh, 2007) and have recommended it for removal of pesticides from wastewaters (Alam et al, 2000;Gupta and Ali, 2001;Lu et al, 2005;Akhtar et al, 2007;Sharma et al, 2008). The results of these studies indicate that the use of CFA for pesticides removal from industrial and agricultural wastewaters can be useful.…”

Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash

“…There was no significant removal (0-14 %) during 6 h of incubation at 10 or 30 °C. Since the ash samples were positively charged at very low pH values and negatively charged at neutral and alkaline pH (Table 5), the proposed mechanism of P removal by fly ash is P adsorption onto calcite surfaces and the formation of amorphous calcium phosphate precipitates (9,33).…”

“…At first, our aim was to test wood fly ash as a substrate for phosphate (P) removal from urban wastewater, since various types of fly ash have been proven to serve as potent P adsorbents (9)(10)(11). In addition, we wanted to investigate the potential toxicity of wood fly ash to microorganisms present in the wastewater as, to the best of our knowledge, such a study has not yet been reported.…”