scholarly journals Analysis of Heavy Metals in Azadirachta indica A. Juss Leaves, as Bioindicator for Monitoring Enviromental Pollution in Guayaquil, Ecuador

2020 ◽  
Author(s):  
M.J Morales Estupiñan ◽  
Sandra Recalde ◽  
Katherine Orozco ◽  
William Ponce
Keyword(s):  
Heavy Metals ◽  
Azadirachta Indica

scholarly journals Heavy Metals contents in Neem Tree (Azadirachta indica) Parts and Surroundings

2019 ◽  
Vol 3 (8) ◽  
pp. 126-130
Author(s):  
Ideisan I Abu-Abdoun ◽  
Zohuir A Al-Balawna
Keyword(s):  
Heavy Metals ◽  
Azadirachta Indica ◽  
Neem Tree

scholarly journals Heavy Metals in Leaf, Stem Bark of Neem Tree (Azadirachta indica) and Roadside Dust in Maiduguri Metropolis, Borno State, Nigeria

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Joseph Clement Akan ◽  
Lawan Bukar Inuwa ◽  
Zaynab Muhammad Chellube ◽  
Babagana Lawan
Keyword(s):  
Heavy Metals ◽  
Azadirachta Indica ◽  
Stem Bark ◽  
Neem Tree ◽  
Roadside Dust

scholarly journals Biochemical transmutation in Lumbricus terrestris and phytoextraction of heavy metals from the swamp of Challawa industrial layout, Kano, Nigeria

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
R. O. Arise ◽  
D. I. Basiru ◽  
O. Olufemi ◽  
R. I. Adeoye
Keyword(s):  
Heavy Metals ◽  
Soil Contamination ◽  
Azadirachta Indica ◽  
Industrial Effluent ◽  
Translocation Factor ◽  
Contamination Factor ◽  
Lumbricus Terrestris ◽  
Iron Chloride ◽  
Magnesium Concentration ◽  
Biochemical Alterations

AbstractDischarge of untreated industrial effluents has been associated with soil contamination. Biochemical alterations in Lumbricus terrestris and remediation capacity of Azadirachta indica tree from industrial effluent discharge locations in Challawa (A and B) and Kura village (control location C) were assessed. Levels of nitrate, phosphate, iron, chloride, and hardness at locations A and B were significantly (p < 0.05) higher than those at location C, but their sulfate concentrations were significantly (p <  0.05) weaker. pH and magnesium concentration at location A were significantly higher than those at locations B and C. Levels of Fe, Cu, Zn, Pb and Mn in soils at the discharge locations were significantly (p < 0.05) higher than those of C. Azadirachta indica tree (AIT) had a translocation factor (TF) > 1 for Pb and Zn, while its biological concentration factor (BCF) was > 1 for Fe. Values of biological accumulation coefficient (BAC) for AIT and soil contamination factor (CF) were < 1 for the metals. Bioindicators of oxidative stress (MDA, GST, CAT and SOD) in earthworm supernatants from the discharge locations were significantly higher (p < 0.05) compared to that at location C, while their GSH levels were significantly (p < 0.05) lower. Acetylcholinesterase (AChE) activity in earthworm supernatants from discharge locations was significantly lower (p < 0.05) in comparison with the control. Trends in results revealed that AIT may be useful for extraction and stabilization of heavy metals in polluted soils. Also, the biochemical alterations in L. terrestris may serve as sensitive bioindicators of soil contamination.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

Nicotianamine: mediator of transport of iron and heavy metals in the phloem?

1993 ◽  
Vol 88 (3) ◽  
pp. 522-529 ◽  
Author(s):  
Udo W. Stephan ◽  
Gunter Scholz
Keyword(s):  
Heavy Metals

Association between heavy metals and depression, anxiety, and panic: A cross-sectional study

2011 ◽  
Author(s):  
Parker Woody ◽  
Michael Zhang ◽  
Craig Pulsipher ◽  
Dawson Hedges ◽  
Bruce Brown
Keyword(s):  
Heavy Metals ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional
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