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صفحه اصلی
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بیست و نهمین کنفرانس شیمی آلی ایران
Removal of industrial contaminants from water :A review,
نویسندگان :
نادیا جفایی ( دانشگاه ازاد واحد علوم و تحقیقات )
کلید واژه ها :
heavy metals،Membrane filtration،water
چکیده مقاله :
Fresh water is a valuable natural resource and can be easily contaminated. In the 21st century, water has become a scarce natural resource globally due to population growth, urbanization, and widespread agricultural practices. These factors cause industrial water pollution, groundwater depletion and greenhouse gas emissions, which in turn cause global warming. Human water demand in arid environments continues to increase, and groundwater supplies are limited, causing severe annual droughts. Industries such as mining and agriculture account for more than 70% of surface freshwater loss through pollution during mineral processing and over-irrigation of crops, respectively. Various sources such as heavy metals, dyes, pathogenic and organic compounds lead to a decrease in water quality. Pollution of surface and underground water sources by industrial wastes aggravates water shortages and as a result severe health risks that threaten aquatic and terrestrial life. does, intensifies. Increasing industrialization and urbanization have put pressure on water resources. This eventually leads to the contamination of clean water. In low-lying areas, the dumping of industrial waste increases the chances of water pollution due to the high rate of infiltration into the soil. Pollutants can reach water sources both through underground water and through surface water and by the release of solid, liquid or gas particles from different industries. Pollutants can be reduced through physical, chemical and biological methods, thereby reducing the health and environmental effects caused by it. Several alternative treatment processes, such as membrane filtration, have been proposed as final treatment methods. The purpose of this article is to summarize the types of pollutant compounds, filtration processes and membranes that have been studied the most in this field, with special emphasis on how changing the membranes, whether the manufacturing process or the composition of nanomaterials, affects their performance. Based on past research, these techniques significantly remove one or more pollutants, but are not sufficient to effectively remove most toxic pollutants from wastewater. Technologies combined with nanomaterials may be a skillful approach to remove various pollutants from wastewater.
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