Prospects for the Production and Application of New Zeolite-Like Sorption Materials for Waste Water Treatment in Railway Enterprises

2020 ◽  
Vol 24 (6) ◽  
pp. 4-9
Author(s):  
М.V. Obuzdina ◽  
E.A. Rush
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Raw Materials ◽  
Waste Water Treatment ◽  
Polymer Network ◽  
Waste Products ◽  
Main Component ◽  
Sulfur Containing

The article presents the results of researches of zeolite modification in order to create sorbents for wastewater treatment from heavy metal ions. Zeolitive tuffs of deposit of the Zabaikalye Territory are considered as raw materials. It is proposed to modify zeolites with highly organosilicon compounds hexamethyldisilazane [(CH3)3Si]2NH and tetraethoxysilane (С2H5O)4Si, which leads to hydrophobization of the surface and an increase in adsorption capacity. A method for modifying the structure of natural zeolite with a sulfur-containing polymer obtained from waste products of epichlorohydrin, the main component of which is 1,2,3-trichloropropane, is described in more detail. A sulfur-containing polymer network is formed by using sulfur dissolution at room temperature in the monoethanolamine – hydrazine hydrate system and condensation with 1,2,3-trichloropropane. The result of applying a sulfur-containing polymer network is not only hydrophobization of the zeolite surface, but also the appearance of sulfur atoms in its composition, which increases the selectivity to heavy metal ions. Based on the obtained experimental data, the method of improvement the existing technologies for wastewater treatment at enterprises (railway transport) by introducing a deep post-treatment into the sorption unit scheme is proposed.

scholarly journals New sorption materials based on modification of natural zeolites in metal wastewater treatment processes

2019 ◽  
Vol 140 ◽  
pp. 08001
Author(s):  
Marina Obuzdina ◽  
Elena Rush
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Metal Ions ◽  
Natural Zeolite ◽  
Heavy Metal Ions ◽  
Natural Zeolites ◽  
Treatment Processes ◽  
High Sorption ◽  
Main Component ◽  
Sulfur Containing

This study considers the problem of wastewater treatment from heavy metal ions and possible ways to solve it, for example, by modifications of natural zeolites from the deposits of Transbaikalia region. We offer a method of modifying the structure of natural zeolite with a sulfur-containing polymer derived from epichlorohydrin waste, the main component of the 1.2,3trichloropropane. The sulfur-containing polymer mesh is formed by the use of the dissolution of sulfur at room temperature in the system of mono-ethanolamine-hydrazine hydrate and condensation with 1.2,3-trichlorpropane. The result of applying a sulfur-containing polymer mesh lies not only in the hydrophobization of the zeolite surface, but also in the appearance of sulfur atoms in its composition, which contributes to an increase in the selectivity with respect to heavy metal ions. We demonstrate the possibility of using new sorption materials in deep wastewater treatment processes of galvanic production. As a load for the adsorbent filter, we propose to use a three-layer filtering material with a load of natural zeolite of various modifications. It has been proven that such chemical modification of zeolite allows to obtain sorbents with an increased surface area and transitional pores that have a high sorption activity in relation to heavy metal ions.

Research Progress in Removing Heavy Metals from Waste Water via Bio-Sorption

2014 ◽  
Vol 587-589 ◽  
pp. 692-695
Author(s):  
Wei Sun
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Waste Water Treatment ◽  
Research Progress ◽  
Traditional Methods ◽  
Sorption Method

Bio-absorption has an unparalleled advantage over other traditional methods in removing and recycling heavy metal ions from waste water. Consequently, it has a promising future. In this paper, the traditional methods and the bio-sorption method via which heavy metals are removed from waste water are compared to summarize the mechanism of bio-sorption, the types of bio-sorbent, the factors that can influence bio-sorption and the state of its application in waste water treatment .

Sulfur-Containing Pyridylazulenes: Synthesis and Chromogenic Behaviors for Heavy Metal Ions

Heterocycles ◽  
2012 ◽  
Vol 85 (9) ◽  
pp. 2251 ◽  
Author(s):  
Shigeharu Wakabayashi ◽  
Emi Matsumoto ◽  
Mitsue Nishiguchi ◽  
Rina Yamaoka ◽  
Miki Ishiura ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Sulfur Containing

Granulated sulfur-containing sorbents for recovery of heavy metal ions from aqueous solutions

2008 ◽  
Vol 81 (5) ◽  
pp. 886-888 ◽  
Author(s):  
T. A. Zaporozhskikh ◽  
Ya. K. Tret’yakova ◽  
V. A. Grabel’nykh ◽  
N. V. Russavskaya ◽  
V. Yu. Vshivtsev ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Sulfur Containing

ChemInform Abstract: Sulfur-Containing Pyridylazulenes: Synthesis and Chromogenic Behaviors for Heavy Metal Ions.

ChemInform ◽  
2013 ◽  
Vol 44 (3) ◽  
pp. no-no
Author(s):  
Shigeharu Wakabayashi ◽  
Rina Yamaoka ◽  
Emi Matsumoto ◽  
Mitsue Nishiguchi ◽  
Miki Ishiura ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Sulfur Containing

scholarly journals Production of activated carbon from poultry feathers for waste water treatment

2019 ◽  
Vol 80 (8) ◽  
pp. 1407-1412 ◽  
Author(s):  
Rue Chiramba ◽  
Gratitude Charis ◽  
Nonhlanhla Fungura ◽  
Gwiranai Danha ◽  
Tirivaviri Mamvura
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Ph Value ◽  
Waste Water Treatment ◽  
Limiting Factors ◽  
Poultry Feathers

Abstract Contamination of water bodies by heavy metal ions is a challenge many developing nations like Zimbabwe face, with negative environmental and socio-economic repercussions. Treating affected bodies usually requires a costly consignment of chemicals and activated carbon. This research investigates the possible use of an abundant waste resource – poultry feathers – to make activated carbon for heavy metal ion removal. Poultry consumption in this nation generates more than five million tonnes of feathers a year, with very few uses of this by-product. This research was carried out to evaluate the effectiveness of activated carbon synthesized from poultry feathers with sodium hydroxide as the activating agent. It was tested for removing heavy metal ions from waste water at Lake Chivero and the experimental work done showed that it had a removal efficiency as high as 97%, with a high affinity for lead ions as compared with chromium ions. Upon characterization, the activated carbon showed an iodine number of 520 mg and it worked best at a pH value of 8. The efficiency removal also increased with increasing adsorbent concentration as well as contact time up to a period where these factors ceased to be the limiting factors of the reaction.

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