The hydraulic properties, such as hydraulic conductivity and water retention, of aged diesel-contaminated and bioremediated soils were examined and implications of the hydraulic properties for assessing bioremediation performance of soils were proposed. Bioremediation of diesel-contaminated soil was performed over 80 d using three treatments; (I) no nutrient added, column-packed soil, (II) nutr...

3 Testing Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 3.1 General Principles in Testing Biodegradable Plastics . . . . . . . . . . . . . . 373 3.2 Analytical Procedures for Monitoring Biodegradation . . . . . . . . . . . . . . 375 3.2.1 Visual Observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375 3.2.2 Changes in Mechanical ...

Recently, microplastic pollution has become an environmental issue with widespread concern. As a bigger reservoir of microplastics than the ocean, borne by soil impact on its structure and properties that cannot be ignored. Furthermore, help plants, animals microorganisms, this emerging pollutant will eventually threaten human health. Microplastics are difficult to recycle due their small parti...

Kerosene is the colorless liquid and slightly heavier than gasoline thatspecific odor removes after evaporation. Soil and underground water source arecontaminated with different pollutants such as petroleum hydrocarbons. These pollutantshave various negative environmental effects on soil and surrounding environment. Theaim of this research is to understand the effect of kerosene pollution on tw...

Kerosene is the colorless liquid and slightly heavier than gasoline thatspecific odor removes after evaporation. Soil and underground water source arecontaminated with different pollutants such as petroleum hydrocarbons. These pollutantshave various negative environmental effects on soil and surrounding environment. Theaim of this research is to understand the effect of kerosene pollution on tw...

Heavy hydrocarbons (HHCs) in soils impacted by crude oil spills are generally recalcitrant to biodegradation due to their low bioavailability and complex chemical structure. In this study, soils were pretreated with varying concentrations of ultraviolet radiation A (UVA) or ultraviolet radiation C (UVC) activated titanium dioxide (TiO2) (1%–5%) under varying moisture conditions (0%– 300% water ...

A set of four soils was extensively studied for composition, sorption/desorption, and biodegradation to investigate linkages among these three inter-related factors. Composition of soil organic matter (SOM) was quantitatively characterized using pyrolysis GC-MS; although CO2 dominated the total ion chromatogram for all soils, each soil produced a distinctively different pyrogram and 1.4-4.8% of...

The influence of the nonionic surfactant Brij 35 on biodegradation of slowly desorbing polycyclic aromatic hydrocarbons (PAHs) was determined in contaminated soils. We employed a soil originated from a creosote-polluted site, and a manufactured gas plant soil that had been treated by bioremediation. The two soils differed in their total content in five indicator 3-, 4-, and 5-ring PAHs (2923 mg...

The research was focused on the slurry-phase biodegradation of naphthalene in soil. Among ex situ techniques, the slurry phase offers the advantage of increased availability of contaminants to bacteria. From naphthalene contaminated soil, a Pseudomonas putida M8 strain capable to degrade naphthalene was selected. Experiments were performed in a stirred and oxygenated reactor. In this study, the...

Present study report on biodegradation of starch grafted polyethylene (PE), successfully synthesized by graft copolymerization method using benzoyl peroxide as the radical initiator. Biodegradable behavior of the grafted PE was ascertained by soil burial test. Percent weight loss was measured as a function of number of days and observed that it increased with increasing number of days. Microana...