scholarly journals Чутливість мікроміцетів до важких металів

2011 ◽  
Vol 2 (2) ◽  
pp. 49-55
Author(s):  
O. N. Korinovskaya ◽  
V. N. Gryshko
Keyword(s):  
Heavy Metals ◽  
Fusarium Solani ◽  
Maximum Permissible Concentration ◽  
Maximal Concentration ◽  
Cunninghamella Echinulata ◽  
Moderate Growth ◽  
Initial Stage ◽  
Lead Zinc ◽  
Zinc Nickel ◽  
Copper Lead

The sensitivity of 33 micromycete species to nitric compounds of copper, lead, zinc, nickel and cadmium has been determined. Absidia butleri Lendn, Mortierella vanesae Dixon-Stewart, Cunninghamella echinulata Thaxte, Curvularia tuberculata Jain, Cladosporium cladosporiodes (Fresen) G. A. de Vries and Fusarium solani (C. Mart.) Appel et Wollenw are sensitive to minimal content of the heavy metals (0.75 of maximum permissible concentration (MPC)) in the growth medium. At the same time Trixoderma longibrachiatiim Rifai, Alternaria alternatа (Fr.) Keissl and Penicillium sp. 4 demonstrated moderate growth under maximal concentration (50 MPC). It is determined that minimal content of the heavy metals in the initial stage of influence (up to 48 h) promotes growth of only Fusarium oxysporum E. F. Sm. et Swingle, while retards growth of the other species.

Features of Pollution by Heavy Metals of Soils of Tagangrog City

2013 ◽  
Vol 807-809 ◽  
pp. 149-152
Author(s):  
Nadia Korikova ◽  
Natalia Gusakova ◽  
Dmitry Kovalenko
Keyword(s):  
Heavy Metals ◽  
Maximum Permissible Concentration ◽  
Stripping Voltammetry ◽  
Ecological Assessment ◽  
Lead Zinc ◽  
Copper Lead

The content of copper, lead, zinc and cadmium in 45 samples of city soils were determined by the method of a stripping voltammetry. Results are compared with maximum permissible concentration of analyzed metals. Existent level of pollution of soils by heavy metals was characterized and its ecological assessment was given.

Distribution and significance of copper, lead, zinc and cadmium in the Corio Bay ecosystem

1981 ◽  
Vol 32 (2) ◽  
pp. 151 ◽  
Author(s):  
JD Smith ◽  
ECV Butler ◽  
BR Grant ◽  
GW Little ◽  
N Millis ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Nutrient Cycling ◽  
Mytilus Edulis ◽  
Water Exchange ◽  
Dry Weight ◽  
Weight Basis ◽  
Threshold Levels ◽  
Lead Zinc ◽  
Significant Interference ◽  
Copper Lead

Levels of copper, lead, zinc and cadmium in sediments, waters and mussels (Mytilus edulis) from Corio Bay (Vic.) were measured on two occasions in 1977. The bay has restricted water exchange with Port Phillip Bay and is known to have received a major input of cadmium. The respective concentrations of copper, lead, zinc and cadmium in the sediments were 2-50,2-2l0,4-398 and up to 12.6 �g/g; in the unfiltered waters, I .5-25, <0.4-11, 3.9-67 and 0.11-5.6 �g/l; and in the mussels, 4.8-21. 1.2-9.7, 105-110 and 9.8-53 �g/g on a dry weight basis. The observed levels of heavy metals are compared with threshold levels reported in the literature as causing significant interference with growth of phytoplankton and nutrient cycling by bacterial processes.

scholarly journals Evaluate the Rate of Pollution in Soil using Simulink Environment

2019 ◽  
Vol 32 (1) ◽  
pp. 135 ◽  
Author(s):  
Luma N.M.Tawfiq ◽  
Mohammed A. Hasan
Keyword(s):  
Heavy Metals ◽  
Differential Equations ◽  
Mathematical Models ◽  
Contamination Sources ◽  
Simulink Model ◽  
Cobalt Nickel ◽  
Zinc Cadmium ◽  
Lead Zinc ◽  
Contamination Levels ◽  
Copper Lead

       In this paper we design a Simulink model which can be evaluate the concentration of Copper, Lead, Zinc, Cadmium, Cobalt, Nickel, Crum and Iron. So, this model would be a method to determine the contamination levels of these metals with the potential for this contamination sources with their impact. The aim of using Simulink environment is to solve differential equations individually and as given data in parallel with analytical mathematics trends. In general, mathematical models of the spread heavy metals in soil are modeled and solve to predict the behavior of the system under different conditions.

scholarly journals Determination of Heavy Metals (Lead, Zinc, Nickel and Cadmium) in Medicinal Plants (Scent Leaf and Pawpaw) in Bayelsa State, Nigeria

2021 ◽  
pp. 40-47
Author(s):  
Ebimobowei Assayomo ◽  
Dorcas Dauta Bawo ◽  
Ayodele Oyedeji ◽  
Gloria Ekpatarziba Ezenatein ◽  
Ahiakwo Bright Ogbo
Keyword(s):  
Biological Sciences ◽  
Heavy Metals ◽  
Medicinal Plants ◽  
Carica Papaya ◽  
Conventional Medicine ◽  
Permissible Limit ◽  
Ocimum Gratissimum ◽  
Lead And Cadmium ◽  
Lead Zinc ◽  
Zinc Nickel

Aims: This study investigated the level of zinc, nickel, lead and cadmium in selected medicinal plants - Scent Leaf (Ocimum gratissimum) and Pawpaw (Carica papaya) that are traditionally used in alternative medicine in Amassoma community, Bayelsa State, Nigeria. Study Design: Scent leaf (Ocimum gratissimum) and Pawpaw (Carica papaya) from where these plants are grown were randomly collected for heavy metal analysis from within Amassoma community in Southern Ijaw Local Government Area of Bayelsa State, Nigeria Place and Duration of Study: This study was carried out in Biological Sciences, Faculty of Science, Niger Delta University, Wilberforce Island, Amassoma, Bayelsa State between March 2019 to September 2019 Methodology:  Scent leaf (Ocimum gratissimum) and Pawpaw (Carica papaya) were digested and analyzed for heavy metals using Atomic Absorption Spectrophotometer (AAS, model S471096). The method used was wet-ashing method for the analysis. Results: The result showed that the concentration of Lead in the pawpaw fruit with 5.99mg/kg and pawpaw seed with 3.72mg/kg, were above the WHO permissible limit. While the concentration of Cadmium in the pawpaw fruit, pawpaw leaf, pawpaw seed and scent leaf with 1.32mg/kg, 0.96mg/kg, 0.21mg/kg, and 0.59mg/kg, were all above the permissible limits. Again, Zinc in the pawpaw fruit, pawpaw leaf, pawpaw seed and scent leaf were 2.52mg/kg, 2.53mg/kg, 5.30mg/kg, and 0.79mg/kg respectively, and these are also above the permissible limit. While that of the concentration of Nickel in the pawpaw fruit, pawpaw leaf, pawpaw seed and scent leaf were observed to be within permissible limit. Conclusion: It is therefore recommended that caution should be taken when such plants are to be used as alternative to conventional medicine as excess of it could pose the risk of bioaccumulation and possible health effects in humans.

scholarly journals INFLUENCE OF METEOROLOGICAL PARAMETERS ON THE CONCENTRATION OF HEAVY METALS AND ETIOLOGICAL AGENTS IN SEWAGE SLUDGE SAMPLES AS A TOOL FOR THEIR USE IN AGRICULTURE

2020 ◽  
Vol 17 (34) ◽  
pp. 147-163
Author(s):  
Jemima Gonçalves Pinto FONSECA ◽  
Lucas Prudêncio EITERER ◽  
Marcelo Henrique OTENIO ◽  
Leônidas Paixão PASSOS ◽  
Júlio César José SILVA
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Meteorological Parameters ◽  
Sewage Treatment ◽  
Etiologic Agents ◽  
Lead And Zinc ◽  
Thermotolerant Coliforms ◽  
Lead Zinc ◽  
Etiological Agents ◽  
Copper Lead

The influence of temperature and rainfall on nutrient levels, heavy metals, and etiologic agents in sludge samples collected at the Sewage Treatment Station of Juiz de Fora, Minas Gerais, Brazil, was verified over 24 months. The results showed high levels of nitrogen (4.7-5.2%), phosphorus (1.4-2.2%), potassium (0.076-0.106%), magnesium (0.113-0.386%), iron 5.03%) and zinc (38.2-6902.1 mg Kg-1). For most of the investigated samples, the concentration of zinc was above the maximum allowed value (2,800 mg Kg-1). The concentrations of arsenic, cadmium, chrome, copper, and lead were below the maximum values allowed by the legislation. Parasitological analyzes identified thermotolerant coliforms (0.49-160 NMP g-1) and helminth eggs (1 egg), however, in amounts less than allowed by legislation. These results are indicative of the efficiency of the sewage treatment process. The results showed a significant influence of the meteorological parameters on the concentrations of nitrogen, copper, lead, zinc and pathogens in the sludge. The results also showed a strong correlation between the concentrations of copper, lead and zinc indicating that the presence of these elements in the sewage sludge has a common origin. The results demonstrated the feasibility of using the investigated matrix as fertilizer when collected in rainy periods when it favors the dilution of the elements present in their soluble forms.

Effects of Heavy Metals (Copper, Lead, Zinc) Stress on Absorption and Accumulation Characteristics of Sedum aizoon L.

2012 ◽  
Vol 518-523 ◽  
pp. 659-664
Author(s):  
Xiao Hui Zhou ◽  
Hong Yan Yuan ◽  
Yan Yang ◽  
Bo Wang ◽  
Xiao Ping Lu
Keyword(s):  
Heavy Metals ◽  
Polluted Environment ◽  
Underground Part ◽  
Water Culture ◽  
Zinc Stress ◽  
Lead Zinc ◽  
Sedum Aizoon ◽  
Artificial Water ◽  
Accumulation Characteristics ◽  
Copper Lead

By using artificial water culture, transportation and accumulation of Sedum aizoon L. under heavy metals (copper, lead, zinc) stress were studied .The result showed that aizoon had a certain ability of accumulating heavy metals. When Cu2+ concentration was more than 40umol/L, the enrichment of copper ability had reached to the level of hyperaccumulation plants did. Besides, when Pb2+ concentration was more than 60umol/L, the aboveground part saturated; while when Pb2+ concentration was about 730 mg/kg, the underground part Pb2+ enrichment was increasing to the extent of Pb2+ concentration was 9600-16000 mg/kg. It will provide a new kind of material for phytoremediation applied in polluted environment.

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