The effect of chemical treatment hemp hurds slices in three solutions (EDTA (Ethylenediaminetetraacetic acid), NaOH and Ca(OH)₂) on the properties natural material was discussed this paper. Changes morphology, composition structure as well thermal stability before after their modification were investigated by using FTIR (Fourier transform infrared spectroscopy), XRD (X-ray powder diffraction analysis) TG (thermogravimetry)/DSC (differential scanning calorimetry). Size exclusion...

Chromium is an indelible non-volatile trace element of raw materials used in cement clinker production. This work focused on the study content total chromium and soluble hexavalent cements. Cements samples various types (CEM I, CEM II, III V) were investigated experiment. Total cements as well chemical composition was measured by using X-ray fluorescence spectrometry (XRF). The average concentrations vary from 178.5 to 257.3 mg per kg cement. concentration (VI) leachates colorimetric method....

Microwave synthesized iron oxide nanoparticles and microparticles were used to prepare a magnetically responsive biosorbent from Rhytidiadelphus squarrosus moss for the rapid efficient removal of Co2+ ions thioflavin T (TT). The biocomposite was extensively characterized using Fourier transformed infrared (FTIR), XRD, SEM, EDX techniques. magnetic showed very good adsorption properties toward TT e.g., kinetics, high capacity (218 μmol g−1 Co 483 TT), fast separation, reusability in four...

This paper investigates the influence of a phosphogypsum dump on surrounding environment (soil ecosystem) in Sumy region (Ukraine). Analysis soils was performed to study possible presence compounds leaching from dump. For physical chemical analysis samples, X-ray fluorescence (XRF) analysis, diffraction (XRD) and Fourier transform infrared spectrophotometry (FTIR) were used. XRF did not confirm contamination around dump, soil fluoride levels measured this comparable average concentration...

Abstract Geochemical modeling plays an increasingly vital role in a number of areas geoscience, ranging from groundwater and surface water hydrology to environmental preservation remediation. is also used model the interaction processes at - sediment interface acid mine drainage (AMD). AMD contains high concentrations sulfate dissolved metals it serious problem eastern Slovakia. The paper focused on comparing results laboratory precipitation metal ions (the Smolnik creek, Slovakia) with...

The paper is focused on the research of biochemical treatment sewage sludge and phosphogypsum under sulphate-reducing conditions with a phosphorus release process. theoretical foundations work were based formalization using principles autocatalysis natural systems. During experimental for control physicochemical parameters process spectroquantic, X-ray fluorescence analysis other techniques used. A schematic model dephosphatation anaerobic stabilization was developed. increase dosage had...

Discharges of acidic, highly mineralized water (acid mine drainage - AMD) belong to accompaniment mining activities that have a negative impact on the environment in many countries World, especially where had long tradition. Generally, AMD is product sulphide minerals oxidation. The typical character these discharges low pH (about 3-4) and high concentration heavy metals. This very limiting for various treatment technologies, including sorption.Sorption techniques are widely used remove...

This paper focuses on the characterization of demolition construction waste containing asbestos fibers and monitoring fibrous dust released from asbestos–cement products (ACPs) during their removal a three-story industrial building. Asbestos-containing was carried out according to management system in terms protection workers. The results chemical analysis, X-ray diffraction infrared analysis scanning electron microscopy samples confirmed same material quality (AC) elements used throughout...

Heavy metals, including copper, are a serious environmental problem today. As an essential part of acid mine drainage they cause degradation surface and subsurface water quality, drinking water. Significant character is low value pH, as result hydrogen cations releasing into aqueous environment during the process pyrite oxidation high concentration heavy metals. Sorption techniques widely used to remove metal ions from large volumes solutions. The fact pH must be taken in consideration...

Pollution of water by toxic substances is one the major reason concerning human health as well environmental quality.In terms pollution, mining activities represent a serious threat.Countries middle Europe, where extraction mineral resources takes place long period, have to solve problems wastewater containing whole spectra heavy metals, which are dangerous environment.Finding new and cheap ways contaminated metals treatment can increase quality environment in affected localities thus...

Pyrogenic carbonaceous materials produced by pyrolysis process of various waste feedstocks are increasingly used in non-soil applications such as water purification tools. thermochemically converted from wood chips, corn cobs, garden green waste, cherry pits, walnut shells, pine cones and municipal sewage sludge slow under N 2 atmosphere, were characterized total C analysis, specific surface area, volumes micro- mesopores tested batch experiments potential radiocesium sorption materials....

Industrial wastewaters, particularly those associated with mining and mineral processing, can contain high con-centrations of sulphate. There are various methods sulphate removal e.g. reverse osmosis, ion exchange, precipitation by lime, cements, salts barium the biological process. The soluble most commonly used for from aquatic acidic solutions to insoluble product BaSO4. Benefits precip-itation efficiency but limitations toxicity compounds economical costs. For this reason recycling BaSO4...

The aim of this study was to characterize two types cellulosic fibers obtained from bleached wood pulp and unbleached recycled waste paper with different cellulose content (from 47.4 percent up 82 percent), compare analyze the potential use for building application, such as plastering mortar. Changes in chemical composition, crystallinity degree polymerization were found. lower quality showed heterogeneity fiber sizes (width length), they had greater surface roughness comparison high purity...

Acid mine drainage (AMD) is considered as one of the worst environmental problems associated with mining activity. In Slovak Republic there are some localities existing AMD generation conditions. The most critical values were observed in abandoned deposit Smolnik. Waters from earth surface penetrated and they enriched metals their pH decreased. Acidity caused mainly by oxidation sulphide minerals. whole complex produces large amounts AMD, discharging flooded (pH = 3-4, Fe 500-400 mg/l; Cu...

Biochar is a promising metal-immobilizing material, nevertheless the studies of its modification and application in removal radionuclides, especially 137Cs from contaminated liquids remain rare. This research demonstrated that horticultural waste derived biochar (GWB) produced by slow pyrolysis process could be suitable Cs adsorbent also useful support to impregnate potassium nickel(II) hexacyanoferrate(III) (KNi-HCF). Porous materials combining sorption properties carrier KNi-HCF have been...

This article describes utilization of a cement kiln bypass dust as an added component in hydraulic road binder. Three experimental binder mixes (BM1–BM3) with variation the composition main constituents (cement clinker, ground limestone and granulated blast furnace slag) constant content (10%) were prepared under laboratory conditions. The properties constituents, fresh hardened specimens tested according to STN EN 13282-2 for normal hardening physical chemical all (fineness: +90 µm ≤ 15...

The adsorption properties of natural zeolite (clinoptilolite) has been studied in order to determine its applicability for copper and zinc removal acid mine drainage treatment process. For purpose these experiments the determination sorption equilibrium efficiencies were performed under batch conditions using single dual-component solutions. carried out acidic (pH approx. 4). In general, obtained results from kinetic showed rapid decrease metal concentration during first 10 min,...

The remains of human activities may be seen in several places the landscape positive or negative form. Probably most common phenomenon that fundamentally impacts country is mining activity. environmental problems caused by have attracted a great deal research attention and led to development numerous sediment heavy metal contamination assessment methods, including index method, dynamic synthesis methods chemistry, ecology toxicology, etc. This was undertaken order determine analyze selected...

The aim of this work is to study the suitability MgO-based cement as an inorganic binder instead traditional Portland into composites with organic filler material such hemp hurds. cements, in contrast which requires high temperatures (about 1450 °C) during its production, demand less energy (the maximum temperature for controlled calcination obtain MgO from magnesium carbonate 750 °C), becoming a more efficient environmental point view. first part paper summarises results physico-mechanical...