Evaluation of Removal and Adsorption Isotherms of Zinc and Copper from Municipal Solid Waste Leachate Using Clinoptilolite Adsorbent
Journal Title: Journal of Health Research in Community - Year 2016, Vol 2, Issue 1
Abstract
Introduction and Purpose: Heavy metals are among the most important pollutants in leachate waste, causing serious health risks for humans through entering the food chain and reaching the top of food pyramid. Therefore, this study aimed to evaluate the efficacy of modified clinoptilolite in the removal of copper and zinc ions from landfill leachate and modeling of adsorption isotherms and reactions.Methods: This cross-sectional in vitro study was conducted to test waste landfill leachate as a true sample for four seasons in 2014 in Bam, Iran. Natural zeolite (clinoptilolite), modified with 2 M HNO3 solution, was used to remove copper and zinc. Experiments were conducted as batch systems, in which the effects of pH, adsorbent dosage, and contact time on the adsorption of heavy metals in municipal waste landfill leachate by clinoptilolite (as soil amendment) were investigated. Afterwards, the adsorption isotherms of each adsorbent were demonstrated.Results: In total, the removal efficency of zinc in the optimum pH=5, equallied time=120 min and Adsorbent dosage of 120g/l was reached 92%. Adsorption isotherms indicated that the capacity of this adsorbent was higher in zinc, compared to copper, and adsorbents were absorbed with higher energy. The adsorption process was based on Langmuir’s equations (isotherm type II) (R2=0.99).Conclusion: According to the results, adsorption capacity of clinoptilolite was high for copper and zinc and based on isotherm equations, adsorption took place with higher energy. It was concluded that this method could be used for the removal of these metals due to its high removal efficiency. Therefore, it is recommended that further studies be conducted to evaluate the possibility of removal of other heavy metals with this method.
Authors and Affiliations
ali toolabi, ahmad allahabadi, mohammad miri, hamidreza karimi sani
Assessment of the Consumption Pattern of Household Insecticides in Mazandaran Province
Introduction and purpose: An awareness of the pattern of using household insecticides in order to determine the type of damage caused by them, how to use household insecticides, the necessary safety measures in using ins...
Investigating the Effect of Recycled Polymers application on bed Soil Quality of sanitary Landfills and Groundwater Pollution Control
Introduction and purpose: One of the important problems in the management of waste is the health and environmental hazards of the leachate leakage of urban waste landfills to groundwater. This research aimed to investiga...
Biodiversity and Geographical Distribution of the Ticks in Ahvaz, Southwest of Iran, 2018
Introduction and purpose: Ticks as biological vectors and reservoirs of diseases, such as Crimean-Congo hemorrhagic fever (CCHF), have an important role in the transmission of pathogens to humans and animals. In this reg...
Health Risk Assessment of Occupational Exposure to BTEX in the Painting unit of a Bicycle Industry in Quchan, Iran
Introduction and purpose: Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) is regarded as one of the most important pollutants in organic compounds present in paint compounds the toxic effects of which are well known....
Evaluation of the Relationship between Workaholism, Organizational Silence, and Burnout in Staff of Mazandaran University of Medical Sciences in 2014
Introduction and Purpose: Workaholism can be enjoyable, but at the same time, frustrating and problematic with positive and negative repercussions. This study aimed to investigate the relationship of workaholism and org...