scholarly journals A METHOD FOR ACCELERATING ELECTROCHEMICAL PHYTOREMEDIATIONOF WASTE WATER FROM HEAVY METAL IONS WHEN EXPOSED TO PHYTOSORBENT PLANTS BY PHYSICAL FIELDS

2020 ◽  
pp. 132-143
Author(s):  
L.N. Olshanskaya ◽  
R.Sh. Valiev ◽  
T.V. Osipova
Keyword(s):  
Magnetic Field ◽  
Heavy Metal ◽  
Metal Ions ◽  
Aquatic Plants ◽  
Constant Magnetic Field ◽  
Heavy Metal Ions ◽  
Lemna Minor ◽  
Waste Waters ◽  
Higher Aquatic Plants ◽  
Physical Fields

The article is devoted to the problem of increasing the efficiency of purification of natural and waste waters from heavy metal ions by the method of electrochemical phytoremediation. The results of studies on the management of phytoremediation processes by exposure to higher aquatic plants by external physical fields (constant magnetic field, combined exposure to a constant magnetic field and geomagnetic field, constant magnetic field and weak electric (j) fields) are presented. The ef-fect of accelerating the sorption of heavy metal ions under the influence of external physical fields on plants of Lemna minor has been experimentally confirmed. Rational conditions for controlling the processes of selectivity and increasing the rate of electrochemical phytoremediation and the completeness of the extraction of heavy metal ions from contaminated waters using higher aquatic plants are determined. A flow chart of the treatment of wastewater from heavy metals by the phytoremediation method using a biopond / settler populated by higher aquatic plants is proposed.

Consortium of Higher Aquatic Plants and Microalgae Designed to Purify Sewage of Heavy Metal Ions

2018 ◽  
Vol 65 (1) ◽  
pp. 143-149 ◽  
Author(s):  
N. R. Akmukhanova ◽  
B. K. Zayadan ◽  
A. K. Sadvakasova ◽  
K. Bolatkhan ◽  
M. O. Bauenova
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Aquatic Plants ◽  
Heavy Metal Ions ◽  
Higher Aquatic Plants

scholarly journals Ecological aspects of heavy metals accumulation in higher aquatic plants in the process of phytoremediation

2018 ◽  
Vol 7 (3) ◽  
pp. 23-27
Author(s):  
Olga Fedorovna Galdeeva ◽  
Olga Viktorovna Kozlovskaya ◽  
Alina Yurievna Kopnina
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Aquatic Plants ◽  
Heavy Metal Ions ◽  
Elodea Canadensis ◽  
Higher Aquatic Plants ◽  
Ecological Aspects ◽  
Bivalent Copper ◽  
Water Plants

This paper deals with pollution of natural and waste waters with heavy metals in the conditions of technogenic impact. It describes one of the numerous methods for neutralizing various contaminants in the aquatic environment, in particular phytoremediation, which has been used for more than 50 years in various countries. The paper considers the role of higher aquatic plants which, according to a variety of confirmatory studies, can be used to extract toxic components from natural and waste water - heavy metal ions. The authors consider a possibility of inorganic origin pollutants extraction with the help of higher water plants of Myriophyllum verticillatum L. and Elodea canadensis Michx. in laboratory conditions. The authors determined pollutants concentration change dependence in the solution with a process duration of less than 10 hours. The authors proved that the maximum purification efficiency is achieved only with the combined use of higher aquatic plants and perfetron. The results of the studies indicate a possibility of water purification from heavy metal ions (ferric iron, bivalent copper, bichromate ions) with the help of higher water plants Myriophyllum verticillatum L. and Elodea canadensis Michx.

scholarly journals Heavy Non-ferrous Metals Adsorption from Water Solutions with Granular Filtering Materials Based on Silicon Rock

2018 ◽  
Author(s):  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Ph Value ◽  
Salt Content ◽  
Human Beings ◽  
Waste Waters ◽  
Metal Compounds ◽  
Physical Chemical ◽  
Siliceous Rocks

Water factor plays an important role in formation of healthy environment for human beings. Due to unfavorable anthropogenic impact upon environment certain surface and groundwater water supply sources are contaminated with heavy metal compounds. Clints (siliceous rocks) are considered the most promising materials for the natural and waste waters treatment from such ingredients. The paper presents the results of the siliceous rocks’ physical/chemical and operational properties studying. It has been shown that these siliceous rocks satisfy all requirements to filtering materials. Methods of physical/chemical analysis were applied for studying the adsorption processes nature. It was for the first time stated (with methods of potentiometric titration and infra-red spectroscopy) that siliceous rocks included the fixed functional ion-exchange groups in their composition and were subacid cationits. Beside chemical adsorption heavy metal ions interact with siliceous rocks due to the action of their physical nature forces. Physical adsorption contributes the most in the heavy metal compounds up-taking by filtering materials, this is supported by the fact of low values of the process activation energy: from 3 to 8 kJ/gram-molecule. Parameters of the process of heavy metal ions adsorption with siliceous rocks in static and dynamic conditions have been calculated in accordance with the experimental results. Influence of salt content and the liquid phase pH value on the adsorption process has been stated. Optimal conditions for the worked siliceous rocks regeneration have been determined. New data on heavy metals cations adsorption with nuclear filtering materials confirm principal possibility of their use for natural and waste waters treatment.

scholarly journals Research of pH influence on sorption properties of sorbents on a basis of residual biomass of microalgae Chlorella sorokiniana and duckweed Lemna minor

2019 ◽  
Vol 124 ◽  
pp. 01050
Author(s):  
N.A. Politayeva ◽  
Yu.A. Smyatskaya ◽  
I.V. Dolbnya ◽  
L.S. Kasobov ◽  
D.B. Rakhimov ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Lemna Minor ◽  
Sorption Process ◽  
Chlorella Sorokiniana ◽  
Sorption Properties ◽  
Special Equipment ◽  
Residual Biomass

This scientific research is determined to a study of sorption process of heavy metal ions removal from aqueous solution at water purification with a help of sorption materials on a basis of residual biomass of microalgae and duckweed. It is known that Chlorella sorokiniana and duckweed Lemna minor have in their composition different valuable substances such as lipids, proteins, pigments, pectic substances. After their extraction residual biomass is formed. And in present study it is proposed for using as biosorbent for water purification. At different pH values the removal of ions of heavy metals (Zn(II), Cd(II), Pb(II), Cu(II)) occurs with varied efficiency; it is an important and informative parameter. Equilibrium and initial concentration of the solution with heavy metal ions were measured by voltammetric method of analysis with a use of special equipment. Chitosan was used as a component for making composite sorption materials with residual biomass of microalgae and duckweed. It is biopolymer which widely used in water purification. Due to this, prepared granules have good sorption properties. Nowadays in the era of technology and wide industrial production it is important and actual to develop new ecological technology and useful materials for water treatment and other fields for environment protection in general.

Biomimetically Synthesized Luminescent Tb3+-Doped Fluorapatite/Agar Nanocomposite for Detecting UO22+, Cu2+, and Cr3+ Ions

2021 ◽  
Author(s):  
Hongjuan Liu ◽  
Xianli Wang ◽  
Thulitha Abeywickrama ◽  
Forough Jahanbazi ◽  
Zefu Min ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Waste Waters ◽  
Rapid Methods

Radionuclides and heavy metal ions have become the main harmful pollutants in the environment. Developing sensitive and rapid methods to detect them from natural or waste waters is important to...

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