Document Type : Research Paper
Department of Environmental Engineering,, Faculty of Environment, University of Tehran, Tehran, Iran
Department of Environmental Engineering, Kish International Campus,University of Tehran, Tehran, Iran
Department of Environmental Engineering, Faculty of Environment, University of Tehran, Tehran, Iran
These days, contamination of sediment and water resources to heavy metals, especially cadmium, cause severe human health and other organism’s disorders due to its high toxicity. Remediation of cadmium-contaminated sediments is of particular importance and several studies have been carried out on various remedial techniques. Considering that the remedial actions of sediment are diverse and each of them has its own pros and cons, Choosing the suitable and proper method based on geographical, economical, and social conditions is not only challenging but also plays a key role in implementing a successful remediation action. In this study, multi-criteria decision making model and fuzzy hierarchical analysis were used to find the best approach for restoring polluted sediment. In this regard, important methods and indicators have been determined consisting literature review and experts’ opinions. Based on the Weights determination by FAHP, the cost with 46% of weight, the availability of technology (39%), the potential of Pollutant recovery (9%), and time (6%) were determined as the main indicators of decision-making process. Moreover, by using VIKOR as a multi-criteria decision making model, the best options for cadmium-contaminated sediment were identified. Ranking the options shows that the absorption method by using biological adsorbents (Q=0.002, S=0.274, R=0.205) and electrokinetic (Q=0.005, S=0.271, R=0.214) has been selected as the best possible approaches.