scholarly journals Heavy Metals and Arsenic in Water, Sediment and the Muscle of Oncorhynchus mykiss from the Tishgo river in the Central Andes of Peru

2021 ◽  
Vol 22 (4) ◽  
pp. 156-166
Author(s):  
Andrés Condor ◽  
María Custodio ◽  
Fernán Chanamé ◽  
Walter Cuadrado ◽  
Richard Peñaloza
Keyword(s):  
Heavy Metals ◽  
Oncorhynchus Mykiss ◽  
Central Andes ◽  
Heavy Metals And Arsenic

scholarly journals Human Risk from Exposure to Heavy Metals and Arsenic in Water from Rivers with Mining Influence in the Central Andes of Peru

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1946
Author(s):  
María Custodio ◽  
Walter Cuadrado ◽  
Richard Peñaloza ◽  
Raúl Montalvo ◽  
Salomé Ochoa ◽  
...  
Keyword(s):  
Heavy Metals ◽  
High Risk ◽  
Hazard Quotient ◽  
Adult Population ◽  
Hazard Index ◽  
Central Andes ◽  
Anthropogenic Pressure ◽  
Flame Atomic Absorption ◽  
Risk Of Cancer ◽  
Heavy Metals And Arsenic

Water pollution by heavy metals is one of the leading environmental concerns as a result of intense anthropogenic pressure on the aquatic environment. This constitutes a significant limitation to the human right of access to drinking water. In this context, the risk to humans from exposure to heavy metals and arsenic in water from rivers subject to mining influence in the Central Andes of Peru was assessed. Water samples were collected from seven rivers at 63 sampling sites, and concentrations of Cu, Fe, Pb, Zn, and As were determined using flame atomic absorption spectrophotometry. Cluster analysis was used to group 21 sampling sites into four groups with similar chemical characteristics, and principal component analysis was used to simplify the complex relationship between the toxic elements by generating two main components with a total percentage of variation of 86%. Fe, Zn, and As had higher percentages of contribution in the Mantaro, Cunas, and Chia rivers. The hazard quotient was highest for children and adults. The hazard index for ingestion of all the studied heavy metals and As was higher than the threshold value (HIing > 1). HIing in 43% of the rivers indicated that the adult population is at risk of non-carcinogenic effects, and HIing in 14% of the rivers revealed a very high health risk. The risk of cancer by ingestion for children varied from medium to high risk and for adults from low to high risk.

HEAVY METALS AND ARSENIC CONTAMINATION IN LA BARRA DE SANTIAGO ESTUARY, EL SALVADOR

2019 ◽  
Author(s):  
Dina L. López ◽  
◽  
Abiodun E. Ayo-Bali ◽  
Mauricio Vasquez Jandres ◽  
Benancio Henriquez Miranda
Keyword(s):  
Heavy Metals ◽  
El Salvador ◽  
Arsenic Contamination ◽  
Heavy Metals And Arsenic

Distribution of Heavy Metals and Arsenic in Greenbelt Roadside Soils of Pudong New District in Shanghai

2009 ◽  
Vol 18 (6) ◽  
pp. 702-714 ◽  
Author(s):  
H. L. Fang ◽  
Y. Dong ◽  
B. Gu ◽  
G. J. Hao ◽  
Z. W. Lv ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Roadside Soils ◽  
Heavy Metals And Arsenic

scholarly journals Chemical residuality in maize (Zea mays L.) fields irrigated with deep well water

2018 ◽  
Vol 5 (13) ◽  
pp. 111
Author(s):  
Ma. Elizabeth Azpilcueta-Pérez ◽  
Aurelio Pedroza Sandoval ◽  
Ricardo Trejo-Calzada ◽  
Ignacio Sanchez-Cohen ◽  
María Del Rosario Jacobo-Salcedo
Keyword(s):  
Heavy Metals ◽  
Zea Mays ◽  
Zea Mays L ◽  
Residual Analysis ◽  
Maize Plant ◽  
Well Water ◽  
Deep Well ◽  
Fodder Production ◽  
Heavy Metals And Arsenic

The aim was to conduct a residual analysis of the main cationic elements, heavy metals and arsenic in irrigated maize fodder production. Four soil and maize plant samplings were conducted in eight sites in April, May, June and July, 2014. Ca, Na, As, and Pb concentrations were higher in the soil. The As concentration was higher in June and July. La Purísima had a higher As concentration, while Bermejillo, La Galicia and La Rosita had a higher Ca concentration. K, Ca, Pb and Zn had higher concentrations in the maize plant, with Ca, Na and K having highervalues in July and Mg, Pb and Zn being higher in May and July. The content of Ca, Mg, Na and K did not dier among regions; arsenic was higher in Leon Guzmán and La Rosita.

Establishing the limits of the permissible content of chemical elements in the wool of representatives of the family Hamster Cricetidae using centile scales

2020 ◽  
Vol 1 (9) ◽  
pp. 72-77
Author(s):  
M. V. Stepanova ◽  
◽  
V. A. Ostapenko ◽  
Keyword(s):  
Heavy Metals ◽  
Copper Content ◽  
Chemical Elements ◽  
Federal District ◽  
The Body ◽  
Average Content ◽  
Absorption Method ◽  
Opposite Trend ◽  
The Family ◽  
Heavy Metals And Arsenic

The aim of the study was to study the content of some heavy metals and arsenic in members of the Cricetidae family of hamsters and to develop centile scales for assessing the level of accumulation of these elements for the Central Federal District. In 2018–2020, hamster`s wool was studied for the accumulation of zinc, copper, iron, lead, cadmium and arsenic by the atomic absorption method. The data on the characteristics of the content of chemical elements in different sexes of animals are given. In the course of the study, it was found that, according to the value of the average content in the wool of animals of the family, the studied elements form the following decreasing series: Fe> Zn> Pb> Cu> Cd> As. When studying the features of the accumulation of chemical elements by different sexes, a significant increase in the concentration of zinc, iron, cadmium and arsenic in the wool of males was established, compared with females, depending on the species, from 1,38 to 3,98; from 1,28 to 1,52; from 2,00 to 304,00 times, respectively. With regard to the accumulation of copper in the body, the opposite trend is observed. In females, its concentration is 1,5–3,19 times higher. In the studied sample of animals, an increase in copper content was revealed in 44,83% of individuals and a decrease in cadmium in 44,82%.

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