scholarly journals Heavy metals uptake by the hybrid aspen and rowan-tree clones

2008 ◽  
Vol 53 (No. 11) ◽  
pp. 491-497 ◽  
Author(s):  
J. Malá ◽  
P. Máchová ◽  
H. Cvrčková ◽  
T. Vaněk
Keyword(s):  
Heavy Metals ◽  
Populus Tremuloides ◽  
Hybrid Aspen ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Essential Metal ◽  
Plant Parts ◽  
Aseptic Conditions ◽  
The Comparative Study ◽  
Heavy Metals Uptake

Micropropagated plantlets derived from selected clones of the hybrid aspen (<I>Populus tremula × Populus tremuloides</I>) and the rowan-tree (<I>Sorbus aucuparia</I> L.) were used to determine the comparative study of uptake of the toxic, heavy metals Cd, Pb and the essential metal Mn. Samples of roots and aboveground parts (hypocotyl-derived tissues, leaves and stems) were taken from the plantlets grown for 24, 48, 96, or 168 hrs under aseptic conditions, in hydroponics with the toxic heavy metal and the essential metal salts. The concentration and distribution of the accumulated metals were determined using the ICP-OES method. The differences in the uptake capacity of hybrid aspen and rowan-tree clones for Cd, Pb and Mn were identified. Generally, the amounts of accumulated Cd and particularly Pb were much higher in the roots of both hybrid aspen and rowan-tree clones, than in their shoots, at all sample times. Conversely, the amounts of accumulated Mn were significantly lower than Cd and Pb in all plant parts of the hybrid aspen and rowan-tree samples. Patterns of Mn uptake were similar in the above-mentioned tissues of both clones, at all sample times. We concluded that the two clones of hybrid aspen and rowan-tree, lacking auxiliary soil microbiota, can accumulate large amounts of the toxic heavy metals Cd (800–1,500 mg/kg) and Pb (5,000–13,000 mg/kg) in roots and about 100 mg/kg of Cd was determined in aboveground part of hybrid aspen.

ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

1970 ◽  
pp. 07-10
Author(s):  
MdDidarul Islam, Ashiqur Rahaman, Aboni Afrose
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Concentration ◽  
Coconut Water ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Toxic Heavy Metal ◽  
Low Concentration ◽  
Wet Ashing ◽  
Aas Method

This study was based on determining concentration of essential and toxic heavy metal in coconut water available at a local Hazaribagh area in Dhaka, Bangladesh. All essential minerals, if present in the drinking water at high concentration or very low concentration, it has negative actions. In this study, fifteen samples and eight heavy metals were analyzed by Atomic Absorption Spectroscopy (AAS) method which was followed by wet ashing digestion method. The concentration obtained in mg/l were in the range of 0.3 to 1.5, 7.77 to 21.2, 0 to 0.71, 0 to 0.9, 0 to 0.2, 0.9 to 17.3, 0.1 to 0.9, 0 to 0.9 and 0 to 0.7 for Fe, Ni, Cu, Cd, Cr, Zn, Pb and Se respectively. From this data it was concluded that any toxic heavy metals like Cd, Cr, Pb and Ni exceed their toxicity level and some essential nutrients were in low concentration in those samples. 

scholarly journals Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Abate Ayele ◽  
Yakob Godebo Godeto
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Functional Groups ◽  
Heavy Metal Ions ◽  
Future Research ◽  
Oil Well ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Minimum Concentration

Heavy metals generated mainly through many anthropogenic processes, and some natural processes have been a great environmental challenge and continued to be the concern of many researchers and environmental scientists. This is mainly due to their highest toxicity even at a minimum concentration as they are nonbiodegradable and can persist in the aquatic and terrestrial environments for long periods. Chromium ions, especially hexavalent ions (Cr(VI)) generated through the different industrial process such as tanneries, metallurgical, petroleum, refractory, oil well drilling, electroplating, mining, textile, pulp and paper industries, are among toxic heavy metal ions, which pose toxic effects to human, plants, microorganisms, and aquatic lives. This review work is aimed at biosorption of hexavalent chromium (Cr(VI)) through microbial biomass, mainly bacteria, fungi, and microalgae, factors influencing the biosorption of chromium by microorganisms and the mechanism involved in the remediation process and the functional groups participated in the uptake of toxic Cr(VI) from contaminated environments by biosorbents. The biosorption process is relatively more advantageous over conventional remediation technique as it is rapid, economical, requires minimal preparatory steps, efficient, needs no toxic chemicals, and allows regeneration of biosorbent at the end of the process. Also, the presence of multiple functional groups in microbial cell surfaces and more active binding sites allow easy uptake and binding of a greater number of toxic heavy metal ions from polluted samples. This could be useful in creating new insights into the development and advancement of future technologies for future research on the bioremediation of toxic heavy metals at the industrial scale.

Role of Nano-Photocatalysts for Detoxification of Toxic Heavy Metal

2019 ◽  
Vol 16 ◽  
Author(s):  
M. Bilal Tahir ◽  
Abdullah M. Asiri ◽  
M. Faheem Malik ◽  
N. R. Khalid ◽  
T. Iqbal ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Recent Literature ◽  
Environmental Issues ◽  
Aqueous Environment ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Heavy Metal Detoxification ◽  
Green Technique

Background: Nano-photocatalysis through semiconductor-based materials has become an emerging and eye-catching approach for detoxification of hazardous heavy metals in the aqueous environment. Method: In this article, photocatalysis being a green technique along with several other detoxification technologies for toxic heavy metals have been reviewed. Toxic Effects: Further, the adverse effects of heavy metals on human health, agriculture lands, environment, and aquatic system were investigated. Toxic heavy-metals contribute to numerous environmental issues based on their toxicity. Result: Various types of photocatalysts were revised in recent literature for the detoxification of heavy metals. The recycling of photocatalysts may be anticipated as a worthy method for wastewater treatment has also been discussed with recent examples. Conclusion: Moreover, it concludes with efficiency, challenges and new future perspectives for heavy metal detoxification using photocatalysis.

scholarly journals Pengaruh CdCl2 terhadap Produksi Eksopolisakarida dan Daya Hidup Azotobacter

2012 ◽  
Vol 12 (1) ◽  
pp. 34 ◽  
Author(s):  
Reginawanti Hindersah ◽  
Dedeh Hudaya Arief ◽  
Soetijoso Soemitro ◽  
Lukman Gunarto
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Liquid Medium ◽  
Human Health ◽  
Contaminated Soil ◽  
Room Temperature ◽  
Gravimetric Method ◽  
Soil Bioremediation ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal

The contamination of toxic heavy metal Cadmium (Cd) in soils will be endanger the human health because it ismore available comparing to another toxic heavy metals. One method of Cd-contaminated soil bioremediation isusing exopolysachharide-producing bacteria Azotobacter. Exopolysachharides (EPS) can mobilize Cd through theformation of complex Cd-EPS which sequentially can increase the availability of Cd for plants uptake. A laboratoryexperiment has been done to study the EPS production and the viability of six Azotobacter isolates in the liquidculture containing 0.01, 0.1, and 1 mM CdCl2. The bacteria were cultured in liquid medium with and without CdCl2 for72 hours at room temperature. The EPS production was determined by gravimetric method after precipitationusing acetone and centrifugation at 7000 rpm. The result was that all of Azotobacter isolates produce EPS in thepresence of CdCl2. In the culture with 1 mM CdCl2, the density of Azotobacter sp. isolate BS3, LK5, LKM6 increasedsignificantly, and that of isolate LH16 decreased. No significant effect of CdCl2 on the density of isolate BS2 andLH15. This research suggested that some Azotobacter isolates were relatively resistence to the Cd and could bedeveloped as biological agents in Cd-contaminated soil bioremediation.

Facile fabrication of silk protein sericin-mediated hierarchical hydroxyapatite-based bio-hybrid architectures: excellent adsorption of toxic heavy metals and hazardous dye from wastewater

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86607-86616 ◽  
Author(s):  
Pradyot Koley ◽  
Makoto Sakurai ◽  
Toshiaki Takei ◽  
Masakazu Aono
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Congo Red ◽  
Heavy Metal Ions ◽  
Silk Protein ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Hybrid Architectures ◽  
Facile Fabrication

Facilely fabricated silk protein sericin-mediated hierarchical hydroxyapatite hybrid architectures show excellent adsorption of toxic heavy metal ions of Pb(ii), Cd(ii) and Hg(ii) and a hazardous dye, Congo red (CR), from wastewater.

scholarly journals Risk Assessment of Heavy Metals Contamination in Paddy Soil, Plants, and Grains (Oryza sativaL.) at the East Coast of India

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Deepmala Satpathy ◽  
M. Vikram Reddy ◽  
Soumya Prakash Dhal
Keyword(s):  
Heavy Metals ◽  
Paddy Field ◽  
Toxic Heavy Metals ◽  
Transfer Factors ◽  
Plant Parts ◽  
Adverse Health Effects ◽  
Paddy Field Soil ◽  
Release Potential ◽  
Ranking Order ◽  
Near Future

Heavy metals known to be accumulated in plants adversely affect human health. This study aims to assess the effects of agrochemicals especially chemical fertilizers applied in paddy fields, which release potential toxic heavy metals into soil. Those heavy metals get accumulated in different parts of paddy plant (Oryza sativaL.) including the grains. Concentrations of nonessential toxic heavy metals (Cd, Cr, and Pb) and the micronutrients (Cu, Mn, and Zn) were measured in the paddy field soil and plant parts. Mn and Cd are found to be accumulated more in shoot than in root. The metal transfer factors from soil to rice plant were significant for Pb, Cd, Cu, Cr, Mn, and Zn. The ranking order of bioaccumulation factor (BAF) for heavy metals was Zn > Mn > Cd > Cu > Cr > Pb indicating that the accumulation of micronutrients was more than that of nonessential toxic heavy metals. The concentrations of heavy metals were found to be higher in paddy field soils than that of the nearby control soil but below permissible limits. The higher Health Index (HI) values of rice consuming adults (1.561) and children (1.360) suggest their adverse health effects in the near future.

scholarly journals Carbon and nitrogen stabile isotope ratio and heavy metals in Leccinum aurantiacum in a hybrid aspen plantation in agricultural land

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Arta Bārdule ◽  
Dagnija Lazdiņa ◽  
Kristīne Zadvinska ◽  
Lauma Buša ◽  
Arturs Vīksna ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Populus Tremuloides ◽  
Isotope Ratio ◽  
Agricultural Land ◽  
Wood Ash ◽  
Natural Occurrence ◽  
Hybrid Aspen ◽  
Element Cycling ◽  
Carbon And Nitrogen

Edible mycorrhizal fungi can be harvested in the fourth year after establishment of a hybrid aspen plantation in previous agricultural land at hemiboreal conditions. It is important to understand the role of fungi in element cycling at the ecosystem level as well as the amounts of elements, including heavy metals, that are accumulated in fruitbodies of edible fungi in the context of food safety. We therefore evaluated the carbon and nitrogen stable isotope ratio and contamination of Leccinum aurantiacum (Bull.) Gray with heavy metals (Cr, Pb, Mn, Ni, Cd, Cu and Zn) in a juvenile hybrid aspen (Populus tremuloides Michx. × Populus tremula L.) plantation in agricultural land initially fertilised with biogas production residues (digestate), sewage sludge and wood ash, which are potential pollution sources. The research object was established in the spring of 2011, but the natural occurrence of fruitbodies of L. aurantiacum was observed in 2014. The average isotopic data for fruitbodies of L. aurantiacum, collected in the 2014–2018 monitoring period, ranged between -27.4 and -24.5 ‰ for δ13C and between 7.8 and 10.1 ‰ for δ15N. The average content of investigated heavy metals in fruitbodies of L. aurantiacum were up to 129 mg kg-1 for Zn, up to 99 mg kg-1 for Cu, up to 30 mg kg-1 for Mn, up to 1.5 mg kg-1 for Ni, up to 1.7 mg kg-1 for Cd, up to 1.1 mg kg-1 for Cr and up to 0.6 mg kg-1 for Pb. We concluded that the application of digestate, sewage sludge and wood ash as fertilisers to improve soil quality in hybrid aspen plantations in agricultural land did not result in altered isotopic compositions or contamination levels of Leccinum aurantiacum (Bull.) Gray.

Assessment of micro and macro nutrients in poultry feeds available in Dhaka city, Bangladesh.

2017 ◽  
Vol 1 ◽  
pp. 264
Author(s):  
Md Didarul Islam ◽  
Ashiqur Rahaman ◽  
Fahmida Jannat
Keyword(s):  
Heavy Metals ◽  
Adverse Effect ◽  
The Other ◽  
Nutrient Level ◽  
Dhaka City ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Low Concentration ◽  
Feed Formulation ◽  
Macro Nutrients

This study was based on to determine the concentration of macro and micro nutrients as well as toxic and nontoxic heavy metals present in the chicken feed available in Dhaka city of Bangladesh. All macro nutrients, if present in the feed at high concentration have some adverse effect, at the same time if this nutrient present in the feed at low concentration this have some adverse effect too. So that this nutrient level should be maintained at a marginal level. On the other side toxic heavy metals if present in the feed at very low concentration those can contaminate the total environment of the ecosystem. In this study six brand samples (starter, grower, finisher and layer) which was collected from different renowned chicken feed formulation industry in Bangladesh. Those samples were prepared for analysis by wet ashing and then metals were determined by Atomic Absorption Spectroscopy. It was found that 27.7 to 68.4, 57.3 to 121.9, 0.21 to 4.1, 0.32 to 2.1, 0.11 to 1.58, 0.28 to 2.11 and 0.28 to 1.78 for zinc, iron, copper, mercury, cadmium, nickel and cobalt respectively. It was found that essential macro and micro nutrients were present in the feed in low concentration on the other side mercury was present in high concentration in the feed samples.

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