Track topics on Twitter Track topics that are important to you
Due to intense agricultural and industrial activities, the environment has been affected by increasing amounts of pollutants, such as lead, a toxic heavy metal. When introduced to the environment, toxic metals are distributed and incorporated into the liquid medium, sediments, and aquatic biota; bioaccumulating. This research aimed to identify and quantify the levels of toxic metals present in the waters and sediments of Toledo River, compare the obtained results with legislation and other studies, as well as to evaluate the possible pollutant sources of the water body. Six water and sediment samples were taken at seven strategic sites. The concentrations of Cu, Zn, Fe, Mn, Cd, Pb, and Cr in water were compared to the maximum limits established by Brazilian legislation IN CONAMA No. 357/05, for class II fresh waters. The sediment samples were submitted to nitroperchloric digestion, and then the total concentrations of the metals were determined by flame atomic absorption spectrometry (FAAS). The toxicological quality of the Toledo River has been considerably affected by the activities carried out in its surroundings, such as extensive areas of agriculture, pig farming and industrial areas, causing concentrations of Cd, Fe, and mainly Pb, which is observed at concentrations higher than value allowed by the legislation.
This article was published in the following journal.
Name: Environmental monitoring and assessment
Lead (Pb) contamination was recognized in China early in the 1920s. However, the response of Pb contamination in sediments to China's rapid economic and social development remains uncertain to date. W...
Brazilian laws allow the catch of some species as ornamental fish; however, in the absence of biological information, such catch can threaten species conservation. Therefore, this study aimed to offer...
Contamination of trace metals in urban rivers is a global problem. The objective of this study was to investigate the contamination and ecological risks of trace metals in the Hai River, which receive...
The consumption of arsenic (As) contaminated groundwater affects the health of almost 20 million people in China. Unlike the preponderance of observations within the deltas of South and Southeast Asia...
The Huangbai river, with a large phosphorite deposit in the basin upstream, is the drinking-water source of Yichang city, China, and water blooms often break out in it in present times. To investigate...
The purpose of this study is to verify the long-term safety of a 2.5 µg, adjuvanted (aluminium hydroxide) dose of Ross River Virus (RRV) vaccine.
This epidemiological and observational study is aimed to assess cardiovascular risk (CVR) by investigating the prevalence of CVR factors (CVRF), target organ damage (TOD) and cardiovascula...
The primary objective of this study is to assess the safety and tolerability of the Ross River Virus (RRV) Vaccine in a healthy young adult population. Other objectives of this study are t...
The objective of the study is to show that stenting the transverse-sigmoid sinus with the River stent is safe and has probable benefit to relieve clinical symptoms in subjects with idiopat...
Malaria is still endemic in the interior of French Guiana. mixed infections by 2 or more different malaria parasites lead to complex and potentially harmfull therapeutic problems. The aim ...
Objects of precious metal usually containing gems and worn to enhance personal appearance. Health concerns include possible contamination from lead content or bacteria.
A species of rod-shaped bacteria that is a common soil saprophyte. Its spores are widespread and multiplication has been observed chiefly in foods. Contamination may lead to food poisoning.
Political subdivision of eastern RUSSIA located within Europe. It lies between the Volga River and the Kama River, and extends east to the Ural mountains.
State bounded on the north by Michigan and Lake Erie, on the east by Ohio River and Pennsylvania, on the south by Ohio River, and on the west by Indiana.
The exposure to potentially harmful factors such as trace heavy metals, chemicals, radiation, or toxins due to FOOD CONTAMINATION including DRINKING WATER contamination.
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...