A study was conducted to determine the relationship between organic matter content of soil and availability aged phenanthrene. Phenanthrene for 200 days in sterile samples dissimilar soils, soils treated with H2O2 reduce matter, sand. Sequestration as measured by extent mineralization phenanthrene an added bacterium appreciable >2.0% C, bioavailability hydrocarbon declined time aging. not evident or sand <2.0% C. more slowly degraded than freshly compound but a small effect on rate More...

Phenanthrene was rapidly and extensively mineralized by a bacterium in the presence of glass or polystyrene beads with no pores, silica 2.5−15 nm 3-aminopropyl-bonded 6-nm diatomite 5.4 μm pores. These sorbed 10−99% compound 15 h, but 48−100% hydrocarbon desorbed 240 h. Although little phenanthrene from octadecyl-bonded degraded. In contrast, <7% to 5- 300−400-nm desorbed. findings are consistent hypothesis that sequestration reduced bioavailability occur when hydrophobic compounds enter...

Changes in the site density and surface acidity constants (i.e. pKa1 pKa2) of kaolinite montmorillonite were determined after acid or alkali spills, pH buffering capacity was evaluated as a parameter soil function change. Surface complexation modeling with potentiometric titrations Fourier-transform infrared spectroscopy showed that spills did not significantly change properties kaolinite. In montmorillonite, however, decreased basal from 832 to 737 mmol kg-1 by dissolving substituted...

Abstract The bioavailability of an organic compound in a soil or sediment commonly declines with the soil-chemical contact time (aging). A series parallel desorption and experiments was carried out on phenanthrene previously aged up to ∼100 d Mount Pleasant silt loam (Mt. Pleasant, NY, USA) Pahokee peat determine as function aging period degree correlation between reduction rate extent influence matter composition availability. mineralization by two bacteria uptake earthworms showed expected...

Application methods (i.e., pouring and mixing method) of Microbially Induced Calcite Precipitation (MICP) its effect on wind erosion were investigated four soil types medium sand, fine loamy sand loam). With method, calcite precipitated evenly throughout the upper part (0 - 5 cm) all soils tested, but with only showed even distribution. The reason can be ascribed to limited permeability MICP-inducing solution calcium, urea &lt;i&gt;Sporosarcina pasteurii&lt;/i&gt;) through loam due their low...

Per- and polyfluoroalkyl substances (PFAS), particularly perfluorooctanoic acid (PFOA, C7F15COOH), have been widely used in industry due to their high stability heat resistance. Their release during manufacturing treatment processes has led contamination of aquatic systems groundwater. While PFOA is generally resistant degradation under typical aqueous environments, it can be degraded the presence catalysts or strong oxidizing / reducing agents. Previous studies reported that PFOSA...

Life Cycle Assessment (LCA), a systematic method of evaluating the environmental impacts an entire process, will be employed in this study to compare four soil remediation scenarios. In study, we apply LCA on Janghang Songrim Forest South Korea, site contaminated by arsenic from historical smelting operations. The techniques are critical selecting sustainable methods for sites. A thorough understanding these enables identification most environmentally responsible strategies restoration. We...

&amp;#160;Precipitating cadmium in groundwater as sulfide using calcium polysulfide (CPS) has advantages over hydroxide precipitation, it is less affected by pH variations and exhibits a lower solubility product constant. However, dissolved oxygen (DO) can oxidize the precipitated (CdS), leading to its remobilization. From this perspective, study aimed evaluate long-term stability of CPS elucidate stabilization mechanisms.&amp;#160;First, under anoxic conditions, Cd&amp;#178;&amp;#8314; (100...