A Review: Subcritical Water Extraction of Organic Pollutants from Environmental Matrices

A Review: Subcritical Water Extraction of Organic Pollutants from Environmental Matrices

3 January 2024 | Erdal Yabalak, Mohammad Tahir Aminzai, Ahmet Murat Gizir and Yu Yang
This review discusses the use of subcritical water extraction (SBWE) for the removal of organic pollutants from environmental matrices. Organic pollutants, including pesticides, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and pharmaceuticals, are persistent and hazardous, posing significant risks to human and ecological health. SBWE is a promising green technique that uses water under subcritical conditions to extract these pollutants efficiently. Unlike traditional methods, SBWE is environmentally friendly, cost-effective, and can extract both polar and non-polar compounds. The effectiveness of SBWE is influenced by factors such as temperature, pressure, and extraction time. PAHs, which are highly insoluble in water, require higher temperatures for efficient extraction, while PCBs, being non-polar, are more easily extracted at moderate temperatures. Pesticides, which are more soluble in water, are typically extracted at moderate temperatures. SBWE has been shown to achieve high recovery rates for various pollutants, often exceeding 90%. It is also effective in the removal of pharmaceuticals and phthalates from environmental matrices. Compared to other extraction techniques, SBWE offers advantages such as rapid extraction, high efficiency, and the use of non-toxic water. However, the solubility of non-polar compounds in subcritical water is limited, and organic modifiers may be needed to enhance extraction efficiency. Overall, SBWE is a promising method for the extraction and remediation of organic pollutants from environmental matrices.This review discusses the use of subcritical water extraction (SBWE) for the removal of organic pollutants from environmental matrices. Organic pollutants, including pesticides, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and pharmaceuticals, are persistent and hazardous, posing significant risks to human and ecological health. SBWE is a promising green technique that uses water under subcritical conditions to extract these pollutants efficiently. Unlike traditional methods, SBWE is environmentally friendly, cost-effective, and can extract both polar and non-polar compounds. The effectiveness of SBWE is influenced by factors such as temperature, pressure, and extraction time. PAHs, which are highly insoluble in water, require higher temperatures for efficient extraction, while PCBs, being non-polar, are more easily extracted at moderate temperatures. Pesticides, which are more soluble in water, are typically extracted at moderate temperatures. SBWE has been shown to achieve high recovery rates for various pollutants, often exceeding 90%. It is also effective in the removal of pharmaceuticals and phthalates from environmental matrices. Compared to other extraction techniques, SBWE offers advantages such as rapid extraction, high efficiency, and the use of non-toxic water. However, the solubility of non-polar compounds in subcritical water is limited, and organic modifiers may be needed to enhance extraction efficiency. Overall, SBWE is a promising method for the extraction and remediation of organic pollutants from environmental matrices.
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[slides and audio] A Review%3A Subcritical Water Extraction of Organic Pollutants from Environmental Matrices