The Influence of Coexisting Ions on Adsorption-Flotation of Pb2+ in Water by Gordona Amarae

2012 ◽  
Vol 433-440 ◽  
pp. 183-187 ◽  
Author(s):  
Shu Juan Dai ◽  
Shu Yong Yang ◽  
Dong Qin Zhou
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Alkaline Earth ◽  
Surface Complexation ◽  
Alkaline Earth Metals ◽  
Processing Waste ◽  
Precipitation Mechanism ◽  
Heavy Metals Ions ◽  
Complexation Mechanism ◽  
Coexisting Ions

Processing waste water of heavy metals by biosorption-flotation was effected by many factors. Existing coexisting ions in waste water is a important factor. The influence of coexisting alkaline-earth metals ions and heavy metals ions of Cd 2+, Cu 2+, Hg 2+, Zn 2+, As 3+, on results of adsorbing and floating Pb2+ in waste water was examined by using Gordona amarae as adsorbent and laurylamine as collector. The results showed that different sort of heavy metals ions and alkaline-earth metals ions have different influences on biosorption-flotation. The influences on biosorption-flotation by coexisting ions showed that ions exchange mechanism, surface complexation mechanism, oxidation-deoxidize and inorganic micro precipitation mechanism exist probably

Zeta potential of clay minerals and quartz contaminated by heavy metals

2005 ◽  
Vol 42 (5) ◽  
pp. 1280-1289 ◽  
Author(s):  
A Kaya ◽  
Y Yukselen
Keyword(s):  
Heavy Metals ◽  
Zeta Potential ◽  
Metal Ions ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Ion Concentration ◽  
Test Results ◽  
Ζ Potential ◽  
Pore Fluid Chemistry ◽  
Electrokinetic Decontamination

Laboratory and in situ test results show that electrokinetic decontamination is a promising subsurface decontamination method. However, it has also been reported that several problems arise, such as reverse flow and pH gradient across the anode and the cathode during the electrokinetic decontamination process. Variation in pH alters the zeta (ζ) potential of soils, which is one of the factors affecting the efficiency of contaminant removal by the electrokinetic method. The magnitude of the ζ potential controls the fluid flow rate, whereas its sign controls the flow direction. However, research on how the ζ potential of soils changes under various chemical conditions is limited. In this paper, the effect of pore-fluid chemistry on the ζ potential of kaolinite, montmorillonite, and quartz powder is determined with NaCl, LiCl, CaCl2·2H2O, MgCl2·6H2O, CuCl2, CoCl2, ZnCl2, AlCl3, and Pb(NO3)2. The test results reveal that the ζ potential of the minerals with alkali and alkaline-earth metals changes according to the diffuse electrical double-layer theory. The hydrolyzable metal ions produce two points of zero charge (PZCs), one of which is that of the soil; and the other, that of hydrolyzable oxide. The ζ potential of minerals with hydrolyzable metal ions becomes increasingly positive and reaches its maximum value at neutral pH. It then decreases and again reaches very negative values at alkaline pH values (pH ∼ 10), depending on ion concentration and the bulk precipitation pH of hydrolyzable metals as hydrolyzable oxides. On the basis of the results of this study, it is recommended that the ζ potential of the soils be determined before electrokinetic decontamination.Key words: alkaline-earth metals, electrokinetic decontamination, heavy metals, zeta potential.

The Accumulation of Heavy Metals and 137Cs in Plant Products Grown on Radioactively Contaminated Chernozems of Tula Oblast

2020 ◽  
Vol 24 (6) ◽  
pp. 48-53
Author(s):  
O.V. Shopina ◽  
I.N. Semenkov ◽  
T.A. Paramonova
Keyword(s):  
Heavy Metals ◽  
Alkaline Earth ◽  
Perennial Grass ◽  
Alkaline Earth Metals ◽  
Agricultural Products ◽  
Wheat Seed ◽  
Agricultural Plants ◽  
Radioactive Spot ◽  
Contaminated Area

The results of studies of three sites of agrocenoses are presented: wheat (seed cereals), soybeans (legumes) and legume-cereal (rumpgoatskin) perennial grass mixtures to identify the peculiarities of the transition of stable and radioactive pollutants (including substances of hazard classes 1 and 2 and 137Cs) in the system "agro-chernozems – agricultural plants" with soil testing and quality control of aerial and underground plant phytomass. In this radioactively contaminated area, the elemental composition of wheat, soybean, rump and goatskin does not differ from the composition of the corresponding species in the background. Legumes have an increased need for alkaline earth metals (Ca, Mg, Sr) and also contain more Ni and Mn, cereals – in Si. Within the studied part of Plavsky radioactive spot, the quality of agricultural products meets the relevant standards for the content of heavy metals and 137Cs.

scholarly journals Use of Fibrous Chemosorbents for Rain Runoff Treatment from Heavy Metals

2011 ◽  
pp. 47-57
Author(s):  
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Toxic Heavy Metals ◽  
Iron Copper ◽  
Copper Zinc ◽  
Heavy Metals Ions

The paper shows availability of the fibrous chemisorbents use for treatment of storm-rain discharges from toxic heavy metals ions. When fibrous chemisorbents were used in laboratory conditions with model diluted solutions of iron, copper, zinc, and lead the metals’ content in water phase demonstrated 8—42 times decrease. It was stated that real rain discharges treatment with fibrous chemisorbents after “Pokrov Hills” (Moscow) waste water treatment plant resulted in decrease of iron, zinc, copper, and lead content.

Polyvinylpropyllidone decorated manganese ferrite based cues for the efficient removal of heavy metals ions from waste water

2020 ◽  
Vol 599 ◽  
pp. 412559
Author(s):  
Samina Naz ◽  
Tahir Rasheed ◽  
Sayed Tayyab Raza Naqvi ◽  
Dilshad Hussain ◽  
Batool Fatima ◽  
...  
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Manganese Ferrite ◽  
Efficient Removal ◽  
Removal Of Heavy Metals ◽  
Heavy Metals Ions
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