Evaluating Toxicological Properties of Claydite Gravel, Containing Ferrovanadium Production Sludge, by Method of Biotesting with the of Higher Plants

И В Старостина ,Eugene Pendurin,Т А Василенко ,Michael Simonov

doi:10.1051/e3sconf/201912600068

И В Старостина , Eugene Pendurin + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/201912600068

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Abstract

Recycling of sludge wastes, generated at industrial wastewater treatment and containing heavy metals, is a relevant and long-term task in building materials production. At that, the possibility of toxicants emission to the environment should be taken into account. This paper presents the findings of evaluating toxicological properties of artificial porous aggregates (claydite gravel), containing ferrovanadium production sludge, by means of using higher plants (Avena Sativa and Allium cepa) as test objects. It is demonstrated that adding sludge to the raw charge in amount up to 15% in the process of baking intensifies the melt formation with clay minerals, which contributes to the safe binding of heavy metals, reducing their diffusion to water media. Water extracts of the obtained claydite have no phytotoxic effect on higher plants.

Highlights

Over 800 mln tons of sludge materials of various compositions and properties, including metallurgical production sludges, are generated in Russia every year, and are virtually not recycled, but accumulated at dumping places
The earlier studies have demonstrated the good perspectives of using ferrovanadium production wastewater treatment sludges – iron-containing concentrate (ICC) and limestone-plaster composition (LPC) in technology of producing artificial porous aggregates – claydite gravel [10]
The findings of determining the phytotoxic activity of studied claydite gravel samples, containing ICC and LPC sludge, by using Avena Sativa are presented in Tab. 3

Summary

Introduction

Over 800 mln tons of sludge materials of various compositions and properties, including metallurgical production sludges, are generated in Russia every year, and are virtually not recycled, but accumulated at dumping places. This is accompanied with their adverse effect on the natural environment due to the migration of toxicants to the soil and water bodies. There are various known methods of using metallurgical production sludge waste as second-hand materials or corrective additives. Such is the technology of selected reduction of metals in form of hydroxides for their subsequent usage in producing loading pigments for paint-and-lacquer materials and nickel-containing accumulators [1]. Of some interest is the research, aimed at using sludge formations in production of building materials – gypsum binders [3] and various ceramic products [4, 5]

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