Hybrid Soil Washing Process with Ozonation in a Sequencing Batch Reactor to Remediate Arsenic-Contaminated Soil and Petroleum Compounds

Authors

Department of Environmental Science and Engineering, Islamic Azad University West Tehran Branch, Tehran, Iran

Abstract

 
Today, soil pollution is one the most concerning issues relating to environment (Mishra et al, 2019). Soil pollution leads to transfer of organic and inorganic contaminants to plants and animals and finally to human food chain which causes detrimental effects on human health (Wu et al, 2017). One of the metals that have been used by humans is Arsenic. This metal and its compounds are used in medical and dentistry purposes, electrical industry, pesticide and herbicide industry, alloy manufacturing, etc. Arsenic is one of 10 dangerous elements which is considered a threat to public health by World Health Organization (WHO; Beykpour and Arghavan, 2020). To eliminate and mineralize organic contaminants, multiple processes have been utilized. For example, different oxidizers including Chloride or hydrogen peroxide degrade contaminants throughoxidating agents like hydroxyl and superoxide radicals (Xiao et al, 2015). Moreover, soil washing process was observed to eliminate Cadmium and lead from polluted soil (Feng et al., 2020). Furthermore, biological processes are one of the methods to remediate organic and inorganic pollutants. In this regard, sequencing batch reactor (SBR) is used to treat municipal and industrial wastewater. Due to some special features, this system has gained increasing attention in Europe, China, USA (Jafarinejad, 2017). The purpose of this study is to determine the efficiency of soil washing/ ozonation/ SBR as a hybrid process to remediate polluted soil.
 

Keywords

Main Subjects


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