Current Approaches for Remediation of Xenobiotics

Current Methods for Xenobiotic Remediation examine several strategies for eliminating or minimizing contaminants in contaminated areas to save the environment and public health. This chapter discusses bioremediation, phytoremediation, in situ chemical oxidation, thermal desorption, soil vapor extraction, landfarming, and soil washing. Remediation is divided into two types: in situ (on-site) and ex situ (off-site). It also discusses new technologies like electrokinetic and nanoremediation. Xenobiotics are chemicals that an organism does not usually break down. They can be made by people or found in nature, and they can enter into the body through the skin, mouth, or lungs. Some examples are drugs, pesticides, chemicals used in industry, pollutants, natural toxins, food additives, and cosmetics. Xenobiotics can cause a lot of health problems, such as cell damage, allergic reactions, cancer, hormone disruption, and neurotoxicity. Xenobiotic toxicity depends on several things, including the chemical properties of the substance, its concentration, how it enters the body, and the person’s age, sex, genetics, and overall health. Xenobiotic remediation, especially bioremediation, uses microorganisms to break down pollutants. In situ methods include permeable reactive barriers (PRB), bioventing, bio-slurping, and biosparging. Ex situ methods include solid-phase treatment and slurry-phase bioremediation. This chapter also discusses how biotic and abiotic processes break down xenobiotics into harmless substances. These processes include co-metabolism and full biodegradation. Molecular and environmental factors that affect biodegradation rates are also considered. This chapter concludes by discussing how novel molecular tools, such as metagenomics, transcriptomics, and proteomics are improving the efficiency of bioremediation and advancing our understanding of how microbes decompose materials.