Effects of selected heavy metals (Pb, Cu, Ni, and Cd) in the aquatic medium on the restoration potential and accumulation in the stem cuttings of the terrestrial plant, Talinum triangulare Linn

Ecotoxicology ◽  
2009 ◽  
Vol 18 (7) ◽  
pp. 952-960 ◽  
Author(s):  
K. Rajkumar ◽  
S. Sivakumar ◽  
P. Senthilkumar ◽  
D. Prabha ◽  
C. V. Subbhuraam ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Stem Cuttings ◽  
Terrestrial Plant ◽  
Aquatic Medium ◽  
Restoration Potential ◽  
Talinum Triangulare

scholarly journals Changes in Anatomical Features of Chromolaena Odorata during Phytoaccumulation of Heavy Metals

2021 ◽  
Vol 5 (2) ◽  
pp. 365-376
Author(s):  
G.O. Omoregie ◽  
B. Ikhajiagbe
Keyword(s):  
Heavy Metals ◽  
Vascular Bundle ◽  
Control Experiment ◽  
Stem Cuttings ◽  
Chromolaena Odorata ◽  
Constant Weight ◽  
Anatomical Features ◽  
Plant Parts ◽  
Accumulation Of Metals ◽  
Plant Stem

The present study investigated the accumulation of selected HMs by Chromolaena odorata and the concomitant effects on leaf anatomical features. Top soils were collected from a marked plot and pooled together to obtain a composite sample. The soil was sun-dried to constant weight and measured into experimental pots at 20kg each). The pots were divided into 5 metal groups with 3 sub-groups each. Each group was polluted with Manganese (Mn), Cadmium (Cd), Copper (Cu), Lead (Pb) and Zinc (Zn) in their respective chloride forms. Concentrations of the metals in the soil were initially based on their respective ecological screening value/benchmark (ESV). The ESV values for the 5 HMs were 50, 4, 100, 50 and 50 mg/kg respectively. Within each group, the respective HMs was applied in 3 concentrations of 1ESV, 3ESV and 5ESV. The control experiment consisted of plants grown in soils with no exogenous application of the test metals. The experiment was triplicated. Twenty hours later, equal sized stem cuttings of C. odorata (2.0 – 2.3cm in thickness, 30 cm in length) were planted per experimental pot. Six months later, results showed significant accumulation of metals in plant stem, leaves, and most especially the root. Mn was the most accumulated HM in all plant parts (9.22 – 17.86 mg/kg), compared to Cd (0.85 – 1.66 mg/kg).Significant changes in folial anatomy were reported in HM-impacted plants compared to the control. There were more upper epidermal stomata (270 – 353 mm2) in Mn-exposed plants compared to the others. Increase in vascular bundle thickness (p<0.01) was reported in HM-exposed plants compared to control. Highly significant decrease in stem parenchyma thickness (p<0.01) never the less parenchyma thickness of HM-exposed plants ranged from 46.37 – 49.53 µm in Zn and Pb-exposed plants compared to 79.23 µm in the control.

scholarly journals Studying of Heavy Metals (Copper and Cadmium) Interactions with Biomass of the Bryophyte-cyanobacteria Community

2012 ◽  
pp. 103-108
Author(s):  
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Scientific Basis ◽  
Aquatic Medium

Using the method of atomic absorption spectrometry (AAS), the concentrations of some elements (Cu, Cd, Fe, Mn, Pb, Ni, and As ) were measured in the biomass of a bryophyte OST-1 with cyanobacteria (Phormidium sp., Oscillatoria sp.) community after its incubation in aquatic medium with added Cu (4 mg/L) and Cd (0,01 mg/L). Fe, Mn, Pb, Ni, and As were not added to the aquatic medium. It was found that after the incubation the concentrations of Cu and Cd increased. The concentrations of Fe, Mn, Pb, Ni, and As in the biomass did not change in the course of the incubation of the biomass. The results contribute to the scientific basis for developing phytoremediation.

scholarly journals Comparative Assessment of Nutrient Values and Heavy Metals Content of Talinum triangulare Collected from Farm Land (Post Service) and Dumpsite (Oko Fili) in Lagos, Nigeria

2021 ◽  
pp. 97-106
Author(s):  
A. A. Adu ◽  
O. J. Aderinola ◽  
O. B. Adeyeye
Keyword(s):  
Heavy Metals ◽  
Local Government ◽  
Standard Procedure ◽  
Local Government Area ◽  
State University ◽  
Test Analysis ◽  
Nutrient Contents ◽  
Significant Difference ◽  
Mg Content ◽  
Talinum Triangulare

Introduction: Talinum triangulare is a nutritious vegetable whose consumption is popular in Nigeria. Therefore, the necessity to consume a very quality and hygienic T. triangulare cannot be over emphasized. Aims: To investigate the nutrient contents and level of heavy metals in T. triangulare collected from dumpsite and farmland. Place and Duration of Study: Department of Botany, Lagos State University, (Oko fili in Alimosho Local Government Area) and farmland (Post Service in Ojo Local Government Area) between January to March, 2021. Methodology: The data were analyzed using statistical package for social sciences (SPSS) version 20 and a standard procedure was used for t-test analysis. Results: All the amino acids detected in T. triangulare from both dumpsite and farmland had no significant differences (p>0.05). There are no significant difference (p>0.05) between lead (Pb), cobalt (Co), copper (Cu), chromium (Cr) and selenium (Se) in samples examined across the two sampling sites, while arsenic (except in the soil from dumpsite) and nickel (except in plant from both sites) were not detected. However, the concentrations of heavy metals such as calcium(Ca), iron(Fe), potassium(K), magnesium(Mg), sodium(Na), phosphorus(P), and zinc (Zn) in both the soil and T. triangulare  samples from the dumpsite are significantly(p<0.05) higher than that from the farmland. The respective values of these metals (mg/100g) in the plant at dumpsite and farmland are: Ca (343.400±206.475), Fe (82.000±29.839), K(90.900±10.748), Mg(1595.250±149.553), Na(2217.050), P(502.250±140.077) and Zn(60.620±8.739) respectively. Conclusion: Therefore, T. triangulare examined in this study is safe for consumption, however its excess K, Na, and Mg content can be recommended for people with deficiency in those nutrients.

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
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