Simultaneous removal of multiple heavy metals from soil by washing with citric acid and ferric chloride.

The remediation of soil contaminated with multiple heavy metals is a matter of great concern due to its serious threat to the ecosystem and human health. Batch and slurry reactor soil washing experiments were conducted to explore the removal of Cd, Cr, Pb and Zn using 7 agents. Citric acid (CA) and ferric chloride (FeCl) exhibited an obvious synergistic effect on the removal of heavy metals.

Lead was mobilized in acid silty clay loam paddy soil with potassium dihydrogen phosphate (KDP) amendment.

The immobilization effectiveness between Pb and phosphorus in soil varies with soil types. To clarify the effect of phosphate on the availability of Pb in agricultural soil, a culture experiment with three types of paddy soil was performed with potassium dihydrogen phosphate (KDP) added. EDTA, DGT and in-situ solution extraction methods were used to represent different available Pb content.

Ca and SO accelerate the reduction of Cr(VI) by Penicillium oxalicum SL2.

Some ions in soils may affect the growth and metabolism of microorganisms and subsequently alter the remediation efficiency of Cr(VI). Here, the effects of different Ca and SO levels on the reduction of Cr(VI) by Penicillium oxalicum SL2 were investigated. The results showed that Cr(VI) reduction by P.

Investigation of lead bioimmobilization and transformation by Penicillium oxalicum SL2.

Fungi Penicillium oxalicum SL2 was applied for Pb bioremediation in aqueous solution in this study. After 7 days of incubation at different initial concentrations of Pb (0, 100, 500 and 2500 mg L), most of Pb were removed (90, 98.3, and 86.

Characterization of Penicillium oxalicum SL2 isolated from indoor air and its application to the removal of hexavalent chromium.

Removal of toxic Cr(VI) by microbial reduction is a promising approach to reducing its ecotoxicological impact. To develop bioremediation technologies, many studies have evaluated the application of microorganisms isolated from Cr(VI)-contaminated sites. Nonetheless, little attention has been given to microbes from the environments without a history of Cr(VI) contamination.

Mitochondrial and endoplasmic reticulum pathways involved in microcystin-LR-induced apoptosis of the testes of male frog (Rana nigromaculata) in vivo.

Previous studies have shown that toxins produced by toxic cyanobacterial blooms are hazardous materials. In the present study, 1 μg/L microcystin-LR (MC-LR) was observed to induce apoptosis in the testes of male Rana nigromaculata via the mitochondrial and endoplasmic reticulum (ER) pathways at exposure times ranging from 7 d to 14 d. The results showed that reactive oxygen species production and malondialdehyde content were positively correlated with exposure time.

Regulation of nodularin-induced apoptosis by epigallocatechin-3-gallate on fish lymphocytes in vitro.

Nodularin is one of the most conspicuous and widespread pollutants that elicit water ecological hazards to fish, causing serious damage on the immune system and physiological functions. Nodularin can cause oxidative stress-induced apoptosis on fish lymphocytes. The regulatory effects of epigallocatechin-3-gallate (EGCG) at 10, 100, and 1000 μg/L levels on the antioxidant defense system and apoptosis of Carassius auratus lymphocytes exposed to a high dose of nodularin (100 μg/L) were quantified in vitro.

Toxic effects of microcystin-LR on the reproductive system of male Rana nigromaculata in vitro.

This study aims to demonstrate that microcystin-LR (MC-LR) has toxic effects on the reproductive system of male Rana nigromaculata in vitro. R. nigromaculata were treated with 0, 0.

Apoptotic responses of Carassius auratus lymphocytes to nodularin exposure in vitro.

Nodularin, a metabolite of Nodularin spumigena, is widely detected in water blooms worldwide and causes serious negative effects on fish. The apoptosis-related cytotoxic effects and mechanisms of nodularin on Carassius auratus lymphocytes were investigated. Transmission electron microscopy results showed that nodularin-treated lymphocytes display a series of morphological changes, including condensed cytoplasm, nuclear chromatin agglutination and marginalization.