Elemental partitioning, morpho-physiological effects, genotoxicity, and health risk assessment associated with tomato (Solanum lycopersicum L.) grown in soil contaminated with mining tailings.

This study explored the distribution of macronutrients (Ca, Mg, Na, K) and lithogenic (Ba, Cr, Ni, Mn, Fe) and mining-related (As, Pb, Cd, Cu, Zn) toxic metalloids and metals (TMMs) in tomato (Solanum lycopersicum L.), and its effects on plant development, productivity, genotoxicity, and human health, using a soil affected by mine tailings (AS) and an unaffected control soil (CS). The chemistry of soils reflected their mineralogy, and Fe-Ti oxides, sulfides and sulfosalts were found to be the most significant reservoirs of TMMs.

The Implications of Membranes Used as Separators in Microbial Fuel Cells.

Microbial fuel cells (MFCs) are electrochemical devices focused on bioenergy generation and organic matter removal carried out by microorganisms under anoxic environments. In these types of systems, the anodic oxidation reaction is catalyzed by anaerobic microorganisms, while the cathodic reduction reaction can be carried out biotically or abiotically. Membranes as separators in MFCs are the primary requirements for optimal electrochemical and microbiological performance.

Source of detritus and toxic elements of seabed sediments from Acapulco Bay (southern Mexico) and their ecological risk.

Total concentrations of Ba, Cd, Co, Cr, Cu, Mn, Ni, Pb, V, Zn, and As together with Sr and Pb isotopic compositions of seabed sediments from the worldwide famous tourist destination of Acapulco Bay, Guerrero (southern Mexico) were determined to reveal the origin of detritus and toxic elements (TEs), their potential natural and anthropogenic sources, elemental distribution and their ecological risk. Sediments derive entirely from the nearby Acapulco Granite and their concentrations of TEs are variable and rather low, although, several are above the Local Geochemical Baseline in some sites of the bay. The enrichment factor (EF) and Pb isotopes indicate that TEs derive from the Acapulco Granite with contributions of an anthropogenic source represented, very likely, by ship-bottom paints.