Efficiency of Powdery Activated carbon in Ammonia-Nitrogen Removal from Aqueous Environments (Response Surface Methodology)
Journal Title: Archives of Hygiene Sciences - Year 2017, Vol 6, Issue 2
Abstract
Background & Aims of the Study: Nitrogenous compounds could directly create many problems for human's health and the environment. Thus, removal of nitrogenous compounds is necessary. Among the most important problems, decreasing dissolved oxygen, toxicity for aquatics, eutrophication, converting aerobic medium into anaerobic one and corrosion could be noted. The aim of this study was determination of powdered activated carbon absorption efficiency in ammonia-nitrogen removal from aqueous environments. Materials & Methods: This study was conducted as an experimental laboratory scale. In discontinuous system, the effect of parameters including absorbent dose (0.5-1.5 gr), initial N- ammonia concentration (100-200 mg/l), pH (3-9) and contact time (2-120 min) on system efficiency evaluated through Response Surface Methodology (RSM). The results were fitted into Freundlich and Langmuir absorption isotherm and then absorption by the activated carbon absorbent compared by these models and absorption were analyzed. Also, first order, semi-second order and particulate infiltration reaction kinetics were evaluated. Results: N- ammonia removal efficiency had a direct relationship with absorbent dose, pH, contact time and reverse relation with initial N-ammonia concentration. Study the isotherms and kinetics process showed that activated carbon followed Freundlich isotherm as well as semi-second order kinetics. Results from central composition design (CCD) model showed that the studied system efficiency fitted to linear equation and results from model predictions had a great agreement with experimental data (R2=0. 98). Conclusion: according to appropriate removal efficiency, powdered activated carbon could be utilized as an efficient and inexpensive absorbent for ammonium absorbance. Decreasing the system efficiency by increasing pollutant concentration must be considered.
Authors and Affiliations
Hatam Godini, Abdollah Dargahi, Mitra Mohammadi, Ghodratollah Shams Khorramabadi, Ali Azizi, Leila Tabande, Zahra Jalilian
Keywords
Related Articles
- EP ID EP470001
- DOI 10.29252/ArchHygSci.6.2.111
- Views 142
- Downloads 0
Treatment of Highly Turbid Water by Polyaluminum Ferric Chloride (PAFCL)
Background & Aims of the Study: In some situation like rainfall seasons raw water become very turbid so it affected the water treatment plant processes and quality of produced water. Treatment of very high turbid water h...
Prevalence and Predictors of Overweight and Obesity of Adolescents
Background: Adolescent overweight and obesity are a worldwide public health problem plays an important role in their health. This study was conducted on to determine the prevalence and predictors of adolescent overweight...
Efficiency of Horizontal Roughing Filter in Removing Suspended Solids from Effluent of Waste Stabilization Ponds in 2013
Background & Aims of the Study: The Horizontal roughing filters (HRF) are generally formed with three layers. The size of the course at the beginning of the flow path is large and at the end is small. This kind of layeri...
Benzoic Compounds Removal from Aqueous Solutions by Acidic Silk: Equilibrium and Kinetic Study
Background & Aims of the Study: p-Chloronitrobenzene is a benzoic compound that widely used in many chemical industrials. p-Chloronitrobenzene may be absorbed through the skin and is suspected to causing cancer. So, deve...
Effects of Compost, Vermicompost and Sulfur Compost on Scindapsus aureus Growth
Background & Aims of the Study: This study was conducted to investigate effects of biofertilizers application and its interaction with organic manures on Scindapsus aureus performance. Materials & Methods: The experi...