Tea Wastes Efficiency on Removal of Cd(II) From Aqueous Solutions
Journal Title: Archives of Hygiene Sciences - Year 2016, Vol 5, Issue 3
Abstract
Background & Aims of the Study: Heavy metals, such as cadmium (Cd(II)), enter into the environment and cause health hazard due to their toxicity and bioaccumulation in the human body. Therefore, they must be removed from water. In recent years, much attention has been focused on the use of material residues as low-cost adsorbents for the removal of heavy metal ions from aqueous solutions. The aim of this paper is the assessment of tea wastes efficiency on removal of Cd(II) from aqueous solutions. Materials and Methods: The present study was conducted in experimental scale. In this paper, tea wastes were prepared and used as an adsorbent for the removal of Cd(II) ions from water. In batch tests, the effect of parameters like pH (1.0-8.0), initial metal concentration (100-800 mg L-1), contact time (15-120 min), adsorbent dose (1.0-5.0 g) and temperature (25-55 °C) on the adsorption process was studied. Results: The results demonstrated that the maximum percentage of Cd(II) adsorption was found at pH 6.0 and the equilibrium was achieved after 60 min with 3.0 g tea wastes. The experimental isotherm data were analyzed, using the Langmuir and Freundlich models and it was found that the removal process followed the Langmuir isotherm. In addition, the adsorption kinetics followed the pseudo-second-order kinetic model. The maximum adsorption capacity calculated by Langmuir fitting was 71.4 mg g−1. Conclusion: The results suggest that tea wastes could be employed as an effective material for the removal of Cd(II) ions from aqueous solutions and the maximum adsorption capacity was found to be 71.4 mg g−1.
Authors and Affiliations
Mehrdad Cheraghi, Soheil Sobhanardakani, Bahareh Lorestani, Raziyeh Zandipak
Keywords
Related Articles
- EP ID EP469859
- DOI -
- Views 108
- Downloads 0
Optimization of Cr(VI) Photocatalytic Reduction by UV/TiO2 : Influence of Inorganic and Organic species and Kinetic Study
Background & Aims of the Study: Chromium is widely detected in surface waters and underground waters, which usually appear as Cr(VI), and Cr(III), at sites associated with industrial activities. Cr(VI), in effluent strea...
Status, Restrictions and Suggested Approaches in Wastewater Management in Rural Areas of Iran
Aims of the Study: The objective of this study was to appraise wastewater management approaches in rural areas of Iran, restrictions, effects on environment and also definition of suitable management approaches in waste...
Chemical Oxygen Demand Removal from Synthetic Wastewater Containing Non-beta Lactam Antibiotics Using Advanced Oxidation Processes: A Comparative Study
Background & Aims of the Study: Pharmaceuticals are considered as an emerging environmental problem due to their continuous discharge and persistence to the aquatic ecosystem even at low concentrations. The purpose of th...
About the Journal, Author Information Pack & Table of Contents
About the Journal, Author Information Pack & Table of Contents
Evaluation of Bacterial Contamination on Pre Hospital Ambulances in Qom University of Medical Sciences of Iran in 2015
Abstract Background & Aims of the Study: When the issue of the quality of the patient's care is addressed, determination of infection degrees in reference to the quality of such cares has gained a high prio...