Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

2014 ◽  
Vol 293 (2) ◽  
pp. 633-639 ◽  
Author(s):  
M. M. Beisebekov ◽  
S. B. Serikpayeva ◽  
Sh. N. Zhumagalieva ◽  
M. K. Beisebekov ◽  
Zh. A. Abilov ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Cationic Surfactants ◽  
Heavy Metal Ions ◽  
Bentonite Clay ◽  
Ionic Polymers ◽  
Composite Gels

scholarly journals Sorption of Heavy Metal Ions by Composite Materials Based on Polycarboxylic Acids and Bentonite Clay

2021 ◽  
Vol 23 (1) ◽  
pp. 19
Author(s):  
Sh. N. Zhumagaliyeva ◽  
R. S. Iminovа ◽  
G. Zh. Kairalapova ◽  
B. M. Kudaybergenova ◽  
Zh. A. Abilov
Keyword(s):  
Heavy Metal ◽  
Composite Materials ◽  
Metal Ions ◽  
Functional Groups ◽  
Heavy Metal Ions ◽  
Bentonite Clay ◽  
Clay Content ◽  
Composite Gels ◽  
Polycarboxylic Acids ◽  
Study Results

The paper shows the study results of sorption capacities of composite gels based on polyacrylic and polymethacrylic acids with bentonite clay as the mineral filler concerning heavy metal ions (Pb+2, Cu+2, Ni+2, Zn+2, Fe+2, Cd+2). The binding of metal ions to gels occurs through the formation of electrostatic bonds between the charged surface of bentonite clay and ionogenic functional groups of polymers in the composition, as well as the coordination bonds between metal ions and unshared pairs of oxygen electrons in the functional groups of polymers. The gel swelling degree decreases in metal solutions with increasing metals concentration and the content of BC in the composite. The sorption and desorption of heavy metal ions from the polymer-clay composites from model solutions and samples of industrial wastewater from the Kazakhstani metallurgical plants were evaluated. The adjustment of the pH, the temperature of the medium and the clay content in the composite leads to increasing the degree of sorption and achieving regeneration of the used composite gels in certain media. The data obtained testify to the prospects of using these composites as effective sorbents of heavy metals from industrial wastewaters expanding the range of composite materials for wastewater treatment.

scholarly journals Research of nanostructural minerals – bentonites used in purification of mineral water from heavy metal ions (Cu2+, Pb2+, Cd2+, Zn 2+)

2020 ◽  
Vol 4 (78) ◽  
pp. 115-122
Author(s):  
A. SH. BUKUNOVA ◽  
◽  
G. ZH. TURSBEKOVA ◽  
L. B. IRISKINA ◽  
M. K. ZHAMANBAEVA ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Mine Water ◽  
Heavy Metal Ions ◽  
Structural Characteristics ◽  
Mining Industry ◽  
Bentonite Clay ◽  
Acid Activation ◽  
Exchange Cations ◽  
Aluminum Ions

This paper presents the results of studies on the use of bentonite from the Taganskoye field for purification of mine water from the mining industry from heavy metal ions (MI). It has been established that the use of the thermo-acid-activated form of bentonite clay allows the removal of MI Cu2+, Pb2+, Cd2+, Zn2+ions from mine water by 99.6, 94.7, 98.9, 99.5 %, respectively, which ensures that the maximum permissible concentration of fishery is achieved at selected optimal conditions that were identified on the basis of an active experiment. A comparative analysis of the presented results of mass spectrometry and scanning electron microscopy shows that they are valid and do not contradict the obtained experimental data on the composition of exchange cations and structural characteristics in ultrafine mineral phases of bentonite clay samples of natural and thermo-acid activated forms It has been established that during acid activation of bentonite clays, the structure of montmorillonite is retained upon extraction of up to 80 % of magnesium, iron, and aluminum ions and is destroyed only upon their almost complete extraction.

scholarly journals EFFECTS OF POLLUTANTS ON ENZYME ACTIVITIES IN WATER SUBMERGED PLANT CERATOPHYLLUM DEMERSUM

2017 ◽  
Vol 18 (9) ◽  
pp. 200-210
Author(s):  
O.N. Makurina ◽  
S.A. Rozina
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Enzyme Activities ◽  
Cationic Surfactants ◽  
Heavy Metal Ions ◽  
Ceratophyllum Demersum ◽  
Submerged Plant

In this paper the effects of heavy metal ions (Pb2+) and cationic surfactants combination on enzyme activities in water submerged plant Ceratophyllum demersum are considered.

scholarly journals Analysis of sorption capacity of natural sorbents in relation to aqueous solutions of heavy metal compounds

2021 ◽  
pp. 111-119
Author(s):  
O. M. Khomenko ◽  
O. V. Yehorova ◽  
O. O. Mysliuk
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Surface Water ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Heavy Metal Ions ◽  
Chloride Solution ◽  
Bentonite Clay ◽  
Chemical Processing

The main preconditions emergence of an environmental crisis in the country due to surface water pollution include irrational use of water resources in violation of the environmental requirements, discharge of untreated and insufficiently treated industrial and municipal wastewater into water bodies and inflow of polluting substances from agricultural lands as a result of surface water drainage. The whole set of considered factors leads to depletion and pollution of surface water of Ukraine, reduction of their self-cleaning capacity, degradation, impoverishment and collapse of aquatic ecosystems. Excessive content of heavy metal ions in surface water has a negative impact on the environment, causing acute and chronic diseases. Ingress of such pollutants into surface water is almost entirely due to anthropogenic economic activity. Wastewater from chemical, ferrous and nonferrous metallurgy brings a great amount of such pollutants. Among various methods used for removing heavy metal ions from aqueous media, sorption methods remain one of the most effective and popular, mainly due to the fact that they ensure a high degree of purification at relatively low costs. Along with the adsorbents traditionally involved in these processes, a number of studies and practical implementations with use of natural dispersed minerals as adsorbents were conducted lately. The research aims at studying the sorption capacity and efficiency of natural and modified sorbent such as bentonite clay for purification of aqueous solutions containing heavy metal ions in the form of dissolved compounds and justifying its potential application. It studies the efficiency of wastewater treatment aimed at removing heavy metal ions by the natural clay sorbent of bentonite clays of the Cherkaskyi Deposit (Dashukovskyi deposit). The paper presents a technique for modification of bentonite clay in order to increase its adsorption capacity for heavy metal ions using the following three methods: physical (thermal), chemical (processing with application of Iron(III) chloride solution) and combined (thermal processing of the original sorbent followed by processing with application of Iron(III) chloride solution). It has been experimentally proved that a natural sorbent modified via thermal and chemical processing is characterized by a high absorption capacity to heavy metal ions contained in water solutions, in particular to chromium(VI) ions, copper(II) ions and aluminum(III) ions with the purification degree ranging from 5% to 83%. The highest adsorption rate, 83%, is demonstrated by the combined method of bentonite clay modification, therefore proving the effectiveness of application of environmentally friendly natural sorbents for wastewater treatment processes aimed at removing heavy metal ions. The paper indicates the advantages of wastewater treatment sorption methods allowing removal of pollutants of different origin and any concentration.

The Detention of the Heavy Metal Ions by the Zeolitic Volcanic Tuffs (A Case Study of Cluj County, Romania)

2011 ◽  
Vol 3 (11) ◽  
pp. 213-214
Author(s):  
Dobocan Corina Adriana ◽  
◽  
Craciun Florina
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions

Bioadsorption of Multiple Heavy Metal Ions by Rhizophora Apiculate sp. and Elaesis Guineensis sp.

2017 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
M.B. Nicodemus Ujih ◽  
Mohammad Isa Mohamadin ◽  
Milla-Armila Asli ◽  
Bebe Norlita Mohammed
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Living Organism ◽  
Heavy Metal Concentration ◽  
Industrial Area ◽  
Electrochemical Treatment ◽  
Chemical Oxidation

Heavy metal ions contamination has become more serious which is caused by the releasing of toxic water from industrial area and landfill that are very harmful to all living organism especially human and can even cause death if contaminated in small amount of heavy metal concentration. Currently, peoples are using classic method namely electrochemical treatment, chemical oxidation/reduction, chemical precipitation and reverse osmosis to eliminate the metal ions from toxic water. Unfortunately, these methods are costly and not environmentally friendly as compared to bioadsorption method, where agricultural waste is used as biosorbent to remove heavy metals. Two types of agricultural waste used in this research namely oil palm mesocarp fiber (Elaesis guineensis sp.) (OPMF) and mangrove bark (Rhizophora apiculate sp.) (MB) biomass. Through chemical treatment, the removal efficiency was found to improve. The removal efficiency is examined based on four specification namely dosage, of biosorbent to adsorb four types of metals ion explicitly nickel, lead, copper, and chromium. The research has found that the removal efficiency of MB was lower than OPMF; whereas, the multiple metals ions removal efficiency decreased in the order of Pb2+ > Cu2+ > Ni2+ > Cr2+.

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