Wastewater treatment from heavy metal ions using nanoactivated  complexes of natural zeolite and diatomite

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.

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Wastewater treatment using natural zeolite materials

Kompleksnoe ispolʹzovanie mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik shikisattardy Keshendi Paidalanu ◽

10.31643/2021/6445.19 ◽

2021 ◽

Vol 317 (2) ◽

pp. 64-68

Author(s):

S.K. Myrzalieva ◽

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G.N.I.P. Pratama ◽

A.G. Khamidulla ◽

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...

Keyword(s):

Heavy Metal ◽

Wastewater Treatment ◽

Metal Ions ◽

Natural Zeolite ◽

Heavy Metal Ions ◽

Treatment Process ◽

Toxic Substances ◽

Resource Saving ◽

New Energy ◽

Pathogenic Microbes

Today, there is an urgent need in our country to develop and implement new energy - and resource-saving technologies for wastewater treatment and water treatment. The need for such a system is determined by the urgency of the tasks of protecting the health of the population, agricultural products, and other biological objects. Wastewater is contaminated with radioactive substances, heavy metal ions, toxic substances, and pathogenic microbes. During the work, wastewater contaminated with heavy metal ions Cd2+, Pb2+ was treated with a natural zeolite material. The mechanism of water purification from metal ions is based on the porous structure and adsorption capacity of zeolite. Heavy metal ions diffuse into the pores of the zeolite material, displacing sodium ions, which are structural modifiers. The zeolite treatment process was carried out by measuring the permeability of wastewater using a conductometer and comparing its results with the value of the permeability of distilled water. According to the results obtained, this method can be used to completely purify wastewater from heavy metal ions.

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