Lead content in roadside vegetation as indicators of atmospheric pollution

Leaves of six plant species from 31 different locations in Ibadan, Nigeria, were analysed for their lead content. The lead concentrations found ranged between 12 and 32 μg/g, 50 m or more away from the roadside, between 47 and 115 μg/g in the residential low traffic density areas, 5 m from the roadside, and between 165 and 312 μg/g in the commercial high traffic density roadsides, 5 m away from the roadside.     

Evaluation of pesticides residues distribution in fresh and smoked body parts of Clarias gariepinus and assessment of possible health risks in Nigeria

Pesticides residues in fresh and smoked body parts of Clarias gariepinus were investigated to evaluate their contamination status and risks to human health. The results gave an overview of the contamination levels of these (head, body trunk and liver) fish parts. The pesticides [organochlorine (OC), organophosphorus (OP), pyrethroids (PY) and others like: guazatine, methoprene, metalaxyl and imidachloprid] concentration in the fresh and smoked body parts ranged from 0.002 to 0.221 µg/kg and 0.002 to 0.175 µg/kg, with mean concentration of 0.002–0.218 µg/kg and 0.002–0.126 µg/kg, respectively. Smoking was observed to reduce the overall pesticide concentration as follows: head (0.23 µg/kg or 17.3%), liver (0.34 µg/kg or 29.8%) and muscles (0.41 µg/kg or 27.2%). The pesticides contents were significantly lower than standard daily intake and the risk associated with consumption of the fish also showed that the fish posed no potential threat to consumers.     

Cement-based batteries design and performance. A review

Environmental Chemistry Letters - Lithium batteries are increasingly used to store energy, but are limited by high cost, safety concerns, leaking of electrolytes, and low capacity....