Biostimulation of Petroleum Contaminated Soil Using Organic Amendments
摘要
Soil serves as a sink for pollutants and a source of nutrients. The complexity and persistence of hydrocarbon contamination in the environment, which threatens livelihoods and food security, is gaining considerable attention. Due to their water-repellent properties, these hydrocarbons disrupt the normal functioning of plant systems, resulting in nutrient and moisture deficiencies. Additionally, they pose a risk to the well-being of humans, animals, and the environment. Phytoremediation is an effective and eco-friendly method of remediation. However, the success of remediation is influenced by the bioavailability of the contaminants. To promote rapid degradation, organic supplements such as biochar, compost, manure, pressmud, moringa seed powder, chicken waste, palm oil waste, and cow dung have been added to the soil. These amendments enhance microbial growth in the soil, facilitating successful degradation. Organic additions provide a continuous source of organic carbon for microorganisms and act as a soil conditioner, improving the physicochemical properties of the soil while supplying nutrients that support plant growth. By reducing the water’s surface tension, these amendments aid in the extraction of petroleum compounds, affecting the biosorption of hydrocarbons and maintaining soil health. A crucial factor in the sequestration of petroleum hydrocarbons is the type of organic amendment, its dosage, the type and concentration of petroleum hydrocarbons, as well as other environmental factors such as soil characteristics, moisture content, and temperature. In this chapter, we will explore phytoremediation, emphasizing the significance of applying organic amendments to enhance the phytoremediation process of soil contaminated by petroleum.