Nano silica-mediated stabilization of heavy metals in contaminated soils.

Soil contamination with heavy metals presents a substantial environmental peril, necessitating the exploration of innovative remediation approaches. This research aimed to investigate the efficiency of nano-silica in stabilizing heavy metals in a calcareous heavy metal-contaminated soil. The soil was treated with five nano-silica levels of 0, 100, 200, 500, and 1000 mg/kg and incubated for two months.

Kinetics of arsenic release from naturally contaminated soils at half saturation moisture by various extractants.

Kinetic studies on arsenic (As) release from soils are commonly performed using soils spiked or artificially contaminated with As at soil to solution ratios of 1:10 to 1:50 by mass, which make the conditions of study very different from the prevailing field situations. In this study, the kinetics of As release were investigated using different extractants including 1MKHPO, 0.5MNaCHO, 1MNaOH, 1MNHF, and [Formula: see text] in five naturally As-contaminated soils (80-1680 mg total As/kg) at half saturation moisture over a long period of time (15 min-60 d).

Arsenic geochemistry and mineralogy as a function of particle-size in naturally arsenic-enriched soils.

Naturally arsenic (As) enriched agricultural soils represent a significant global human health risk. In this study, As fractionation and mineralogy were investigated in naturally As-enriched agricultural soils and their corresponding sand, silt and clay fractions. Median As increased generally in the order (mg/kg)∶ silt (280) < bulk (314) < sand (323) View Article and Find Full Text PDF