Application of iron nanaoparticles in landfill leachate treatment - case study: Hamadan landfill leachate

Journal of Environmental Health Science Engineering

Rahmani Alireza³  Afkhami Abbass⁴  Naddafi Kazem¹  Samadi Mohammad Taghi³  Zahra Esfahani Kashitarash² 

[1] Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;University of Applied Science and Technology, Water & Wastewater Engineering Department, Power & Water University of Technology, Tehran, Iran;Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran;Faculty of Chemistry, Bu-Ali Sina University, Hamadan, Iran

关键词: Hamadan;    Landfill;    Iron nanoparticles;    Leachate treatment;   

Others  :  821279
DOI  :  10.1186/1735-2746-9-36

 received in 2012-12-15, accepted in 2012-12-16,  发布年份 2012

【 摘 要 】

This study was performed with the objective of determining the efficiency of iron nanoparticles for reducing chemical oxygen demand (COD), 5-day biological oxygen demand (BOD₅), total solids (TS) and color of Hamadan city landfill leachate. Experiments were performed in a batch reactor and the main effective factors of pH, reaction time and concentration of iron nanoparticles were investigated. The obtained data were analyzed with One-Way ANOVA statistical test and SPSS-13 software. Maximum removal efficiencies were 47.94%, 35%, 55.62% and 76.66% for COD, BOD₅, TS and color, respectively (for 2.5 g/L iron nanoparticles dosage, pH = 6.5 and 10 min reaction time). The results showed that the removal of COD, BOD₅ and color had reverse relationship with contact time and TS removal followed a direct relationship (P < 0.05). Iron nanoparticles could remove averagely 53% of leachate COD, BOD₅, TS and color in a short contact time (10 min) increasing pH up to 6.5, increased the removal efficiency for COD, BOD₅, TS and color and then removal efficiency decreased with increasing pH to 8.5. Increasing the dosage of nanoparticles to 2.5 g/L increased the efficiency of process. High compatibility and efficiency of this process was proven by landfill leachate pre-treatment or post-treatment, so this removal method may be recommended for municipal solid waste landfill leachate treatment plants.

【 授权许可】

   
2012 kashitarash et al.; licensee BioMed Central Ltd.

【 图 表 】

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