Study of Sorption of Manganese (II) Cations by Composite Sorbent

2020 ◽  
Vol 989 ◽  
pp. 85-90
Author(s):  
Irina Lebedeva ◽  
Tatiana M. Lonzinger ◽  
Vadim A. Skotnikov
Keyword(s):  
Sorption Isotherms ◽  
Sorption Process ◽  
Exchange Capacity ◽  
Static Exchange Capacity ◽  
Composite Sorbent ◽  
Sorption Material ◽  
Quality Of Water ◽  
Heavy Metal Salts ◽  
Static Conditions ◽  
Manganese Compounds

A significant increase in the amount of pollution (including heavy metals) that enter the hydrosphere as a result of human activity, sanitary requirements that are imposed on the quality of water, lead to the search for effective ways and methods of its purification. Wastewater from many industrial plants contain heavy metal salts, including manganese compounds. The sorption of manganese (II) cations by a composite sorbent from model solutions under static conditions was studied, to determine the possibility of using this sorption material in wastewater treatment. The characteristics of the sorption capacity of the composite sorbent are determined. It was established that the static exchange capacity of the composite sorbent is 0.9 mg/g; distribution coefficient - 47.34 l/g; the degree of purification of the solution is 99.9%. The empirical sorption equations for the manganese (II) cation are found, the sorption isotherms are constructed. It is established that the sorption process is described by the Freundlich equation. Experiments have shown that the composite sorbent is effective in extracting manganese (II) from aqueous solutions. Experimental data suggest that the sorbent studied can be used to clean industrial wastewater from manganese compounds.

scholarly journals Sorption of medical preparations by chitosan

2020 ◽  
Vol 164 ◽  
pp. 06025
Author(s):  
Anna Beliaeva ◽  
Galina Nianikova
Keyword(s):  
Quantitative Determination ◽  
Sorption Capacity ◽  
Maximum Degree ◽  
Sorption Isotherms ◽  
Sorption Process ◽  
Sorption Properties ◽  
Before And After ◽  
Static Conditions ◽  
Degree Of Sorption

The article provides information about sorption properties of crab chitosan in relation to Analgin, Aspirin, Quamatel, Mydocalm, Paracetamol, Tsifran and Phtalazol. Quantitative determination of medicines’ amount before and after sorption was performed by HPLC-MS method with the preliminary plotting of calibration curves. The sorption capacity of chitosan taken in different concentrations was determined. Sorption isotherms and kinetic curves of medications’ sorption by chitosan were plotted. It has been shown that the maximum degree of sorption in static conditions for all studied medicines was achieved within an hour after the beginning of the sorption process.

scholarly journals Sorption of lead and cadmium ions from aqueous solutions using modified zeolite

2018 ◽  
pp. 16-22
Author(s):  
Madina Telkhozhayeva ◽  
Gulziya Seilkhanova ◽  
A. Rakhym ◽  
Ainur Imangaliyeva ◽  
Dina Akbayeva
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Exchange Capacity ◽  
Static Exchange Capacity ◽  
Cadmium Ions ◽  
Modified Zeolite ◽  
Lead And Cadmium ◽  
Static Conditions

The processes of lead and cadmium ions sorption by modified zeolite of Chankanai deposit were studied. Chitosan was used as a surface modifier due to its properties: nontoxicity, biodegradability and biocompatibility. The adsorption process was carried out at room temperature (295 K) and pH 7 under static conditions. The synthesized sorbent has been characterized by scanning electron microscopy (SEM), elemental analysis; the concentrations of Pb(II) and Cd(II) ions before and after adsorption were determined using atomic absorption spectroscopy (AAS). The Si/Al ratio of the zeolite was found to be 1.66, which showed the prospects of using this material as a source object. The static exchange capacity (SEC) of sorbents and the extraction degree of heavy metal ions were determined and compared. It was found that the removal of heavy metal ions increased with the increase of contact time (removal efficiency was 99.1±1.2% for Pb2+ and 83.4±1.2% for Cd2+). The adsorption capacity values of the modified zeolite for metal ions were (0.86±0.03) mg/g for Cd(II) and (0.68±0.03) mg/g for Pb(II). Chitosan-modified zeolite proved to be an effective adsorbent for removal of lead and cadmium ions from aqueous solutions.

Sorption of Metal Ions by New Sulfur-Containing Ionite GMA-MMA-TDGA

2017 ◽  
Vol 863 ◽  
pp. 48-52
Author(s):  
Gulzhan E. Abdraliyeva ◽  
N.A. Bektenov ◽  
N.A. Samoilov ◽  
A.K. Baidullaeva
Keyword(s):  
Sorption Capacity ◽  
Contact Time ◽  
Copper Ions ◽  
Zinc Ion ◽  
Exchange Capacity ◽  
Ion Exchanger ◽  
Static Exchange Capacity ◽  
Sorption Ability ◽  
Static Conditions ◽  
Sulfur Containing

А new polyethyleneimine sulfur-containig exchanger network structure with static exchange capacity of 0.1 N solution of HCl 4.7 mEq/g was obtained by polycondensation of glycidyl methacrylate, methyl methacrylate and phosphoric acid. Sorption of copper (II) and zinc (II) ions was studied and investigated in static conditions from model solutions of sulfates of copper and zinc, in dependence on their concentration and pH, as well as their contact time with the ion-exchanger. Found that the magnitude of the sorption capacity of the ion exchanger for ions of copper (II) at pH 3.6 CuSO4 solution is 4.03 mg / g. It has been established that zinc ion (II) is absorbed best by the sorbent at pH 4.06. In these conditions the sorption capacity of the sorbent for copper ions (II) and zinc (II) respectively equal to 0.8225mmol / g (Cu) and 0.8305mmol / g (Zn). The sorption ability new sulfur-containing ionite with respect to copper ions (II) and zinc (II) is significantly higher than for industrial ionite of KU-2x8.

scholarly journals RESEARCH OF SORPTION CAPACITY OF CUTTING WASTE OF URBAN TREES IN RELATION TO DISSOLVED PETROLEUM PRODUCTS IN AQUATIC ENVIRONMENTS

2021 ◽  
pp. 33-39
Author(s):  
Svetlana V. Maksimova ◽  
◽  
Andrey A. Voronov ◽  
Keyword(s):  
Urban Areas ◽  
Petroleum Products ◽  
Exchange Capacity ◽  
Urban Trees ◽  
Oil Products ◽  
Static Exchange Capacity ◽  
Sorption Material ◽  
Degree Of Extraction ◽  
Poplar Sawdust

The article considers main problems associated with the treatment of surface wastewater in urban areas. This work addresses the task of searching for methods of extraction from aqueous solutions of petroleum products related to the main contamination of surface wastewater. Shredded waste from urban trees filing is an economical sorption material. Urban trees’ sawdust solves the problem of recycling tree branches. The authors describe of the experimental determination of oil capacity and static exchange capacity of maple and poplar sawdust, and show a dependence of the degree of extraction of oil products by phytosorbents on the contact time. The article concludes with assessment of applying urban trees filing waste as a sorption filters’ filling for cleaning surface wastewater from oil products.

scholarly journals Physicochemical and Sorptive Properties of a Phosphorylated Mercerized Cotton Fabric

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3756
Author(s):  
Roman Solovov ◽  
Anfisa Perevoznikova ◽  
Alexandr Seliverstvov ◽  
Alexey Shapagin ◽  
Alexandr Fedoseev ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Phosphorus Content ◽  
High Efficiency ◽  
Positive Impact ◽  
Sorption Process ◽  
Exchange Capacity ◽  
Spectrophotometric Analysis ◽  
Static Exchange Capacity ◽  
Phosphorus Containing ◽  
Sorption From Aqueous Solutions

A process of phosphorylation for a mercerized cotton kersey fabric was investigated. After wet oxidation, the phosphorus content in each sample was determined by spectrophotometric analysis. The range was 0.179 to 0.950 mmol g–1. A significant decrease in the tensile strength of samples resulted from an increase of phosphoric acid concentration in the phosphorylating solution. The mercerization has a positive impact on the process of phosphorylation, as the phosphorus content was found to be three times higher in the samples that underwent mercerization. The sorption properties of phosphorylated cotton fabric were studied using the Cu2+ sorption process as a reference. The value of the static exchange capacity for the phosphorylated fabric was determined to reach its maximum when the concentration of the H3PO4 in the phosphorylating solution was 1.40 M, and was found to be 1.48 ± 0.11 mmol g–1 with the phosphorus content equal to 0.898 ± 0.090 mmol g–1. The sorption of Cu2+ by a single phosphorus-containing group occurred for samples with phosphorus content not exceeding 0.80 mmol g–1. The preliminary studies of micro-quantities of 241Am, 233U, and 239Pu radionuclide sorption from aqueous solutions with phosphorylated textile demonstrated the high efficiency.

THE ISOPIESTIC METHOD APPLIED TO SORPTION ISOTHERMS

1949 ◽  
Vol 27b (2) ◽  
pp. 87-100 ◽  
Author(s):  
S. Barnartt ◽  
J. B. Ferguson
Keyword(s):  
Carbon Tetrachloride ◽  
Linear Relation ◽  
Sorption Isotherms ◽  
Sorption Process ◽  
The Other ◽  
Isopiestic Method ◽  
Simple Criterion ◽  
Water Vapors ◽  
Linear Sections ◽  
Wide Pressure

The isopiestic method has been applied to the sorption of carbon tetrachloride and water vapors by activated coconut shell charcoals. The isopiestic charges were found to be linearly related over wide pressure ranges. Isotherms formed by plotting the isopiestic charges of two charcoals one against the other consisted of three linear sections for both carbon tetrachloride and water. If the pressure isotherm of one charcoal be known, those of other charcoals may be computed from it by weighing relatively few isopiestic charges. Errors inherent in the measurement of equilibrium pressures, as well as those caused by the drift of the pressure isotherms towards higher sorption capacities at a given pressure, are eliminated in the isopiestic method of comparing charcoals. The linear relation between the isopiestic charges affords a simple criterion of rejection for equations proposed to fit the pressure isotherms. It also throws into relief the structural regularities in activated charcoals. The existence of discontinuities m the sorption process, reported by previous experimenters, is supported by the isopiestic data.

Sorption of Water, Ammonia, Ethyl Chloride, and Methane on Na—X Zeolite and Associated Framework Distortion

1974 ◽  
Vol 52 (22) ◽  
pp. 3699-3706 ◽  
Author(s):  
D. L. Rimmer ◽  
R. McIntosh
Keyword(s):  
Water Sorption ◽  
Room Temperature ◽  
Sorption Isotherms ◽  
Length Change ◽  
Sorption Process ◽  
Ethyl Chloride ◽  
Two Dimensional ◽  
X Zeolite ◽  
Methane Sorption ◽  
Multilayer Formation

Length change and sorption isotherms have been determined for water, ammonia, ethyl chloride, and methane on compacted samples of zeolite NaX. Methane sorption at 0 °C and ethyl chloride sorption at −10°C were accompanied by little or no framework distortion as monitored by length change measurements; sorption of ammonia in the temperature range −50 to −70 °C produced more appreciable distortion; and water sorption at room temperature caused large changes. In each case the framework distortion was correlated with different stages in the sorption process. The sorption isotherms for the ammonia/NaX system indicated the possibility at high uptakes of two-dimensional condensation or multilayer formation. The critical temperature for two-dimensional condensation would be −70 °C.

scholarly journals The development of technology for production of zeolites from fly-ash from Troitskaya power plant

2021 ◽  
Vol 8 (1) ◽  
pp. 20218111
Author(s):  
V. A. Snegirev ◽  
V. M. Yurk
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Pore Diameter ◽  
Silicon Oxide ◽  
Exchange Capacity ◽  
Static Exchange Capacity ◽  
Average Pore ◽  
Hydrochemical Synthesis ◽  
Bet Method ◽  
Zeolite Production

The study examines the technology of processing fly ash from Troitskaya power plant for the production of zeolite. The paper presents the results of laboratory studies evaluating the suitability of fly ash from Troitskaya power plant for the production of zeolites and the development of the zeolite production process. Fly ash contains a small amount of heavy metals that can complicate processing, but contains a large amount of silicon oxide. The technology consists of high-temperature alkaline activation of fly ash and hydrochemical synthesis. The resulting powder has a specific surface area of 89.7 m2/g, determined by the BET method, and an average pore diameter of 0.345 μm. The static exchange capacity was 220 mg/g.

scholarly journals Selected elements cations exchange in acidic medium on sorbents surface based on modified brown coal

2017 ◽  
Vol 33 (1) ◽  
pp. 139-150 ◽  
Author(s):  
Agata Stempkowska ◽  
Piotr Izak ◽  
Joanna Mastalska-Popławska
Keyword(s):  
Hydrochloric Acid ◽  
Chemical Modification ◽  
Brown Coal ◽  
Elevated Temperatures ◽  
Exchange Capacity ◽  
Distilled Water ◽  
Desorption Process ◽  
Second Stage ◽  
Before And After ◽  
Static Conditions

Abstract Studies on the sorption and desorption of selected Na+, Ca2+, Mg2+, Mn2+, Cu2+ and Cr3+ cations by materials based on modified brown coal were carried out. The chemical modification of the sorbent material consisted of grinding involving different inorganic substances and organic polymers. Samples were subjected to chemical modification at elevated temperatures for several hours. For comparative purposes, as apart from brown coal, pure humic acids are known for the highest cations exchange capacity, samples of brown coal before and after purification were also analyzed. The ion capacity was determined under static conditions, measuring the difference in the concentration of cations in the sorbent before and after sorption and then after rinsing the sorbent with distilled water (A), and after the desorption process with hydrochloric acid (B). Studies have shown that sorbents based on modified brown coal have rather significant exchange capacities in the range of 270-450 meq/100 g for the first stage and 90-200 meq/100 g for the second stage. It was also found that purified humic acid (450-200 meq/100 g) has the highest exchange capacity and modified brown coal obtained at 250°C has the lowest. The measurement of desorption showed that approximately 10% of the cations are already leached by distilled water and the residue is desorbed under the influence of 10% hydrochloric acid, but the total amount of cations is compatible with the measurement process of the second stage. The sorption affinity to various cations is different. In the case of the sorption measurements, modified sorbents show the highest sorption affinity with respect to calcium, while the unmodified raw brown coal with respect to chromium. The next stage of the measurement showed that the valence of the cation has the highest impact on the sorption affinity.

Effect of Paper Mill Sludge on Adsorption and Desorption of Cd(II) and Pb(II) in Paddy Soils

2014 ◽  
Vol 955-959 ◽  
pp. 2539-2545
Author(s):  
Yan Liu ◽  
Pei Qin Peng ◽  
Xiao Long Zhu ◽  
Xian Qing Ding
Keyword(s):  
Paper Mill ◽  
Sorption Process ◽  
Exchange Capacity ◽  
Red Soil ◽  
Purple Soil ◽  
Paper Sludge ◽  
Paper Mill Sludge ◽  
Adsorption And Desorption ◽  
Freundlich Equation ◽  
Amend Soil

There are high organic matter and cation exchange capacity (CEC) in paper mill sludge, which can be used efficiently to amend soil properties and promote the growth of crops. The batch method was used to investigate effects of paper sludge on adsorption and desorption of Cd (II) and Pb (II) in two types paddy soil (red soil, purple soil), through adding paper sludge to red soil and purple soil. The results showed that isothermal sorption process of Cd (II) and Pb (II) by soils and paper sludge could be well described by Langmuir equation and Freundlich equation, and all coefficients (r) were higher than 0.9. The purple soil had a higher sorption capacity of Cd (II) and Pb (II) than red soil. The sorption capacities of Cd (II) and Pb (II) in soils increased after added paper sludge, and they reached adsorption equilibrium as the percentages of paper sludge were 10%, 1% in red soil and purple soil, respectively. The desorption capacities of Cd (II) and Pb (II) in soils decreased after added paper sludge, and they reached minimum as the percentages of paper sludge were 5%, 2% in red soil and purple soil, respectively. It was better to immobilize Cd (II) and Pb (II) after added paper sludge, thus paper mill sludge can relieve the migration of heavy metals in soil-crop systems. It can provide a new way for safe using of heavy metal contaminated soil and resource utilization of paper sludge.

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