New Sorption Materials on the Basis of Aluminosilicates for Wasterwater Treatment

2017 ◽  
Vol 13 ◽  
pp. 190-196
Author(s):  
Kristina K. Abdugaffarova ◽  
Maksim V. Dorogov ◽  
Anatolii A. Vikarchuk ◽  
Vlada V. Zabolotskikh ◽  
Vladislav S. Firsov
Keyword(s):  
Heavy Metals ◽  
Methylene Blue ◽  
Chemical Composition ◽  
Specific Surface ◽  
Post Treatment ◽  
Pilot Studies ◽  
Physical Methods ◽  
Structure And Morphology ◽  
Composition Structure

This article presents the results of experimental obtaining together with tests of modifications of the granulated sorption aluminosilicate-based material. The chemical composition, structure and morphology of a surface of the obtained modifications of sorbents from clay have been explored. Through a complex of modern physical methods it is established that porosity and a specific surface of clay-based sorbents increased as a result of modification. Pilot studies have shown higher efficiency of new aluminosilicate-based sorbents in comparison with absorbent carbon during sorption of such model pollutants as methylene blue, phenol and ions of heavy metals. Modifications of sorbent which can be effectively used for post treatment of wastewater are revealed.

Inclusion Compounds of Tetracyano Complexes and Their Electrical Properties

1994 ◽  
Vol 59 (11) ◽  
pp. 2436-2446 ◽  
Author(s):  
Mária Reháková ◽  
Anna Sopková ◽  
Vladimír Šály
Keyword(s):  
Electrical Conductivity ◽  
Chemical Composition ◽  
Electrical Properties ◽  
General Formula ◽  
Inclusion Compounds ◽  
High Frequency ◽  
Iodide Ions ◽  
Structure And Morphology ◽  
Composition Structure ◽  
Tetracyano Complexes

The presence of iodine and iodide ions in tetracyanonickelates inclusion compounds with the general formula Ni(B)mNi(CN)4 . n H2O (B = NH3 or ethylenediamine) changes the properties of these compounds. High frequency conductance measurements in the range of 10 - 105 Hz show that the products with ethylenediamine ligands have a higher electrical conductivity than those with NH3 ligands. The differences in the electrical properties between the compounds studied are mainly caused by chemical composition, structure and morphology.

From Nd(III) and Pu(III) Oxalates to Oxides: Influence of Nitrilotris(methylenephosphonic acid) on Chemical Composition, Structure, and Morphology

2017 ◽  
Vol 17 (9) ◽  
pp. 4715-4725 ◽  
Author(s):  
Anne-Lise Vitart ◽  
Blaise Haidon ◽  
Benedicte Arab-Chapelet ◽  
Murielle Rivenet ◽  
Isabelle Bisel ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Structure And Morphology ◽  
Composition Structure

Synthesis and properties of BxCyNz coatings

2001 ◽  
Vol 16 (3) ◽  
pp. 734-743 ◽  
Author(s):  
M. N. Oliveira ◽  
O. Conde
Keyword(s):  
Chemical Composition ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Depth Sensing ◽  
Composition Triangle ◽  
Structure And Morphology ◽  
Fused Quartz ◽  
Composition Structure ◽  
Quartz Substrates

Some of the most interesting compounds from both technological and a scientific viewpoint can be found within the B–C–N composition triangle. Despite all the attention that some phases on the vertices and sides of the triangle have attracted, few works have focused inside the triangle itself. A laser-assisted chemical vapor deposition system was used to deposit B–C–N phases over fused quartz substrates. Two sets of gaseous precursors were used, namely B2H6 + NH3 + C2H4 and B2H6 + (CH3)2NH. The coatings were characterized regarding chemical composition, structure, and morphology. Hardness measurements were also carried out with a depth-sensing indentation instrument. It was found that depending on the gas phase, different regions of the BCN solid composition triangle are accessed. Coatings ranging from pure h-BN to pure B4C were obtained, as well as mixtures of these with BxCyNz compounds.

Fate of nutrients and heavy metals during two-stage digestion and aerobic post-treatment of municipal organic waste

2018 ◽  
Vol 251 ◽  
pp. 238-248 ◽  
Author(s):  
Christine Knoop ◽  
Michael Tietze ◽  
Christina Dornack ◽  
Thomas Raab
Keyword(s):  
Heavy Metals ◽  
Organic Waste ◽  
Post Treatment ◽  
Two Stage

scholarly journals Application of modified green algae Nannochloropsis sp. as adsorbent in the simultaneous adsorption of Methylene Blue and Cu(II) cations in solution

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Buhani ◽  
Tri Agus Wijayanti ◽  
Suharso ◽  
Sumadi ◽  
Muslim Ansori
Keyword(s):  
Heavy Metals ◽  
Methylene Blue ◽  
Green Algae ◽  
Contact Time ◽  
Organic Dyes ◽  
Silica Matrix ◽  
Particle Coating ◽  
Adsorption Data ◽  
Magnetite Particles ◽  
Simultaneous Sorption

AbstractBiomass of algae is a very potent adsorbent for absorbing aqueous waste containing heavy metals and organic dyes. This study purposes to confirm the ability of adsorbents from green algae Nannochloropsis sp. modified with silica (ASN) and followed by coating magnetite particles (ASN-MPs) to absorb simultaneously the mixture of Methylene Blue (ME) and Cu(II) cations in aqueous solution. Simultaneous sorption of ME and Cu(II) cations to ASN and ASN-MPs was carried out by the batch method with the interaction pH condition 7, contact time 90 min, and initial concentrations of ME and Cu(II) cations (0.1–1.0 mM). Based on adsorption data, Cu(II) cations have a greater adsorption rate and capacity (qm) compared to ME at the same contact time and initial concentration. The adsorption capacity (qm) values of the bi-component ME and Cu(II) cation mixture in ASN and ASN-MPs were 1.39 × 10− 1 and 5.32 × 10− 1 mmol g− 1, respectively, with the binary Langmuir adsorption isotherm constant for Cu(II) cations greater than ME. Modified adsorbent from algae Nannochloropsis sp. with silica matrix and magnetite particle coating is an adsorbent that has a high effectiveness in the collective sorption of ME and Cu(II) cations. Therefore, these adsorbents can be used for the adsorption of cation mixtures of heavy metals and organic dyes that are cationic in solution.

Elucidating the Origin of the Toxicity of Nano-CeO2 to Chlorella pyrenoidosa：the Role of Specific Surface Area and Chemical Composition

2021 ◽  
Author(s):  
Changjian Xie ◽  
Yuhui Ma ◽  
Peng Zhang ◽  
Junzhe Zhang ◽  
Xiaowei Li ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Aquatic Environment ◽  
Cerium Dioxide ◽  
Environmental Application ◽  
Ecotoxicological Effects

With the increasing environmental application and discharge of nano cerium dioxide (nano-CeO2), it is urgent to fully understand its ecotoxicological effects on the aquatic environment. This study for the first...

Effect of plasma treatment on chemical composition, structure and sorption properties of lignocellulosic hemp fibers (Cannabis sativa L.)

2020 ◽  
Vol 236 ◽  
pp. 116000 ◽  
Author(s):  
Biljana M. Pejić ◽  
Ana D. Kramar ◽  
Bratislav M. Obradović ◽  
Milorad M. Kuraica ◽  
Andrijana A. Žekić ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Plasma Treatment ◽  
Cannabis Sativa ◽  
Sorption Properties ◽  
Hemp Fibers ◽  
Composition Structure ◽  
Structure And Sorption Properties

Comparative Analysis on Chemical Composition and Charcoal Characterization of Two Miscanthus Species

2011 ◽  
Vol 415-417 ◽  
pp. 1265-1272
Author(s):  
Wen Biao Zhang ◽  
Wen Zhu Li ◽  
Bing Song Zheng
Keyword(s):  
Chemical Composition ◽  
Specific Surface ◽  
Water Content ◽  
Surface Area ◽  
Specific Surface Area ◽  
Ph Value ◽  
Perennial Grass ◽  
Water Extract ◽  
Carbonization Temperature ◽  
Hot Water

Miscanthus is a highly productive, rhizomatous, C4 perennial grass that should be considered as an excellent active carbon precursor. This paper compares the charcoal characterization and chemical composition between M. sinensis and M. floridulus. Species differed in water content, hot water extract, 1% NaOH extract, organic solvent extract, cellulose, lignin and ash. Carbonization temperatures have effects on charcoal yields of Miscanthus, which ranged from 23.5% to 48.0% for M. sinensis and 11.3% to 37.2% for M. floridulus. Water content, charcoal density, pH value, and specific surface area of charcoal characterization varied between two species of Miscanthus. The specific surface area increased with the increase of carbonization temperature. The highest specific surface area of M. sinensis and M. floridulus was 351.74 m2g−1and 352.74 m2g−1, respectively, when the carbonization temperature was 800°C.

Influence of High-Calcium Ash Composition on the Composite Binders’ Properties

2021 ◽  
Vol 316 ◽  
pp. 1019-1024
Author(s):  
O. A. Ignatova ◽  
A. A. Dyatchina
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Cement Stone ◽  
Normal Density ◽  
Fine Aggregate ◽  
Equivalent Amount ◽  
High Calcium ◽  
Composition Structure ◽  
Kinetics Of ◽  
Positive Effect

The paper presents the studies’ results of chemical composition, structure, and physico-mechanical properties of high-calcium ashes from the Kansk-Achinsk coals (2017-2019 selection). It was found that ash has a complex poly-mineral composition and contains hydraulically active minerals and oxides of СаОfr, β-C2S, CA, C3A, C4AF, C2F, CaSO4. According to the content of CaOfr, MgO does not meet standards’ requirements. The uniformity of the volume change is maintained by the composition with 50% of cement. The structure and hardening kinetics of ash and ash-cement stone compositions, obtained from the test of normal density, were analyzed. It was established that the hardening of compositions with ash from the Kansk-Achinsk coals was largely influenced by ash minerals. An equivalent amount of cement in composite binders cannot be replaced. In order to obtain a positive effect, compositions with ash instead cement of no more than 30% and a part of fine aggregate, without exceeding the ratio of ash: cement = 1: 1, should be used.

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