Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV
Journal Title: Journal of Advances in Environmental Health Research (JAEHR) - Year 2015, Vol 3, Issue 3
Abstract
Due to the present water shortage and environmental problems associated with industrial effluent, investigation of novel treatment technologies is an essential approach. Being a highly toxic chemical of asphyxiating characteristics, cyanide is seen as a major environmental pollutant in a wide range of industrial effluents. The present study aimed to address the adsorption and photocatalytic degradation of cyanide using activated fly ash and TiO2/UV. To investigate the removal efficiency of cyanide, two sets of experiments were designed. First, cyanide was absorbed by activated fly ash and degraded via a photocatalytic process, individually. Second, simultaneous adsorption and degradation was examined. The removal efficiency of cyanide by modified fly ash (MFA), TiO2/UV, and their combination (MFA-TiO2/UV) was 76.1%, 81%, and 86.6%, respectively. Optimal conditions for the combination of activated fly ash AFA-TiO2/UV were contact time of 6 hours, temperature of 100 °C, and AFA: TiO2 ratio (w/w) of 1:1. Under these conditions, a maximum removal rate of 92.4% was obtained when 1.2 g of MFA/TiO2 was used with a pH value of 3 in the presence of UV light. Based on the results of cyanide removal, it can be concluded that the combination of adsorption and photocatalytic degradation with MFA-TiO2/UV can be utilized to improve the removal of cyanide from wastewater.
Authors and Affiliations
Shima Rezaei, Hadi Rezaei, Meghdad Pirsaheb, Saeb Ahmadi, Hooshyar Hossini
Keywords
Related Articles
- EP ID EP420675
- DOI 10.22102/JAEHR.2015.40203
- Views 111
- Downloads 0
Surveillance of the physical, chemical, and microbiological quality of swimming pool water in the Hamadan province
Swimming is considered one of the most conventional recreational activities for both leisure and exercising. Swimming pools have either public or private usage. Nevertheless, if the water of the swimming pools is pollute...
Health impact assessment of particulate matter in Sanandaj, Kurdistan, Iran
Air pollution is a major environmental issue in all regions of the world. We aimed to assess the health impacts of particulate matter with an aerodynamic diameter 10 µm (PM10) in Sanandaj, Kurdistan, Iran. The air pollu...
Fabrication, characterization, and microscopic imaging of Fe2O3-modified electrospun nanofibers
This study explored the fabrication, characterization, and microscopic imaging of highly porous electrospun nanofibers based on pure and Fe2O3 nanoparticle modified polyacrylonitrile (PAN) fibers. The desired electrospin...
Awareness and attitude assessment regarding toxic metal-contaminated rice based on the Health Belief Model
Given the presence of toxic metals in some local Iranian as well as some imported rice varieties, it may be of help to focus on public awareness for the implementation of educational interventions. This study aimed to as...
A study on corrosion and scaling potential of drinking water supply resources in rural areas of Sarvabad, west of Iran
Corrosion is a physicochemical reaction occurring between the metal and its surroundings, which usually has an electrochemical nature and results in changes in the properties of the metal. The corrosive water dissolves t...