Latest Research News on Heavy Metal Concentrations: Jan – 2020

Latest Research News on Heavy Metal Concentrations: Jan – 2020

Latest Research News on Heavy Metal Concentrations: Jan – 2020

Determination of heavy metal concentrations in street dusts in Istanbul E-5 highway

Components and quantity of street dust are environmental pollution indicators especially in big cities. Street dust is usually composed of car exhaust gas originated particles and wind-transported particles. Heavy metals, which are found in street dust, like Pb, Cu, Mn, Zn, Cd and Ni are significant for environmental pollution. consistent with the type of auto in traffic, quantity and sort of heavy metals vary in street dust. the utilization of gasoline gives a lift to the importance of lead level especially in street dust even at the beginning of 21st century. [1]

Heavy metal concentrations in molluscs from the Atlantic coast of southern Spain

Trace metals were determined within the two most abundant species of bivalve molluscs along the Atlantic Coast of southern Spain (Donax trunculus and Chamelea gallina) and within the sediments where they live. The results show that the world near the mouth of the Huelva estuary is where the very best metal concentrations are found in sediments and within the two bivalve species. this is often not surprising, considering that the Huelva estuary is that the mouth of the Tinto and Odiel rivers, which have one among the very best levels of metal pollution of all the rivers of Europe. the 2 species of bivalves have different amounts of metals in their tissues. The concentrations of Cr, Cu, Pb, Zn, As and Hg in D. trunculus were significantly higher (p < 0.05) than in C. [2]

Soil heavy metal concentrations, microbial biomass and enzyme activities in a contaminated grassland ecosystem

Soil enzyme activities and microbial biomass were measured during a grassland ecosystem with a good range of heavy metal concentrations starting from 7.2 to 48.1 mmol kg−1 (As, Cd, Cr, Cu, Ni, Pb and Zn) in portions of the U.S. Army’s Aberdeen workplace , Maryland, U.S.A. Total and fluorescein diacetate active (FDA) fungal biomass, FDA-active bacterial biomass, substrate-induced respiration (SIR), the activity of N-acetylglucosaminidase, β-glucosidase, endocellulase, and acid and alkaline phosphatases were also measured. Most measures of microbial biomass were lower in polluted soils. Significant reductions (10- to 50-fold) within the activities of all enzymes closely paralleled the rise in heavy metal concentrations. These results demonstrate that heavy metal contamination of soil has adversely affected the abundance and activity of microorganisms involved in organic matter decomposition and nutrient cycling during this site. [3]

Municipal sewage sludge compost promotes Mangifera persiciforma tree growth with no risk of heavy metal contamination of soil

Application of sewage sludge compost (SSC) as a fertilizer on landscaping provides a possible way for the effective disposal of sludge. However, the response of landscape trees to SSC application and therefore the impacts of heavy metals from SSC on soil are poorly understood. We conducted a pot experiment to research the consequences of SSC addition on Mangifera persiciforma growth and quantified its uptake of heavy metals from SSC by setting five treatments with mass ratios of SSC to lateritic soil as 0%:100% (CK), 15%:85% (S15), 30%:70% (S30), 60%:40% (S60), and 100%:0% (S100). needless to say , the fertility and heavy metal concentrations (Cu, Zn, Pb and Cd) in substrate significantly increased with SSC addition. [4]

Heavy Metal Concentrations in Selected Fishes, and Water from Orogodo River, Agbor, Delta State in Nigeria

This study determined heavy metal:- (lead (Pb), cadmium (Cd), copper (Cu), zinc (Zn) and iron (Fe) concentrations in selected fish species including: (Brycinus intermidus, Clarias gariepinus, Parachanna obscura, Ctenopoma kingsleyae, Hemichromis bimaculatus and Phractolaemus ansorgeii) and water from Orogodo River situated in Agbor, Delta State, Nigeria. Furthermore, the health risk exposure to humans who consume the fish and utilized the water in Orogodo River was assessed. The mean (±SD) concentration of the heavy metal in water ranged from 0±0 mg/l for Cd to 0.35±0.29 mg/l for Fe. The mean (±SD) concentration of metals in fish species ranged from 0.06±0.02 mg/kg for Cd in Brycinus intermidus to 187.90±89.59 mg/kg for Fe in Parachanna obscura. The Bioaccumulation Quotient (BQ) values ranged from 4.51 mg/kg for Pb in Hemichromis bimaculatus to 1297.13 mg/kg for Fe in Phractolemus ansorgei. [5]

Reference

[1] Sezgin, N., Ozcan, H.K., Demir, G., Nemlioglu, S. and Bayat, C., 2004. Determination of heavy metal concentrations in street dusts in Istanbul E-5 highway. Environment international, 29(7), (Web Link)

[2] Usero, J., Morillo, J. and Gracia, I., 2005. Heavy metal concentrations in molluscs from the Atlantic coast of southern Spain. Chemosphere, 59(8), (Web Link)

[3] Kuperman, R.G. and Carreiro, M.M., 1997. Soil heavy metal concentrations, microbial biomass and enzyme activities in a contaminated grassland ecosystem. Soil biology and biochemistry, 29(2), (Web Link)

[4] Municipal sewage sludge compost promotes Mangifera persiciforma tree growth with no risk of heavy metal contamination of soil
Shuangshuang Chu, Daoming Wu, Liyin L. Liang, Fengdi Zhong, Yaping Hu, Xinsheng Hu, Can Lai & Shucai Zeng
Scientific Reports volume 7, (Web Link)

[5] M. Wangboje, O., C. Ekome, P. and I. Efendu, U. (2017) “Heavy Metal Concentrations in Selected Fishes, and Water from Orogodo River, Agbor, Delta State in Nigeria”, Asian Journal of Environment & Ecology, 3(1), (Web Link)

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