Unburned carbon as a low-cost adsorbent for treatment of methylene blue-containing wastewater

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

“…3, when the pH increases from 2 to 4 there is a steep increase in adsorption of methylene blue and no significant change in the amount adsorbed by further increase of pH up to 8. Similar findings were reported by many authors so far (Hamdaoui, 2006;Wang et al, 2005;Dogan et al, 2004;Bhattacharyya and Sharma, 2005). The pH trend observed clearly indicates that the maximum adsorption of methylene blue takes place at both neutral and slightly basic pH.…”

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

“…Some research has been focusing on the study of its sorbent properties and has explored the application of fly ash for treating wastewater (Table 2). Many adsorption studies point to the suitability of fly ash use for retention of hazardous organic pollutants commonly found in many industrial wastewaters such as phenolic compounds [258,259], dyes [260][261][262][263], pesticides [264], petroleum hydrocarbons [265], PAHs [266] and PCBs [266,267].…”

“…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.…”

Removal of methylene blue dye from aqueous solutions by elaeagnusan gastifolial as an adsorbent

“…Since the adsorption increased when temperature rose, this system was considered to be endothermic. In addition to, some researchers reported increased methylene blue removal with increasing temperature values [22][23][24] .…”