Efficiencies of conventional anaerobic digestion procedure and ionizing radiation treatment for removal of pharmaceutical residues from municipal wastewater

Nowadays, pharmaceutical products (PPs) have raised global concerns due to accumulation of their residues in aquatic ecosystems. In the urban environment, epidemics and social factor illnesses, advancement of pharmaceutical industry, hospitals and other health-care institutions, veterinary institutions pharmaceutical industries and uses in household need are the main economic sources or factors influencing emerging dissemination of PPs in the environment

Efficiencies of conventional anaerobic digestion procedure and ionizing radiation treatment for removal of pharmaceutical residues from municipal wastewater

Nowadays, pharmaceutical products (PPs) have raised global concerns due to accumulation of their residues in aquatic ecosystems. In the urban environment, epidemics and social factor illnesses, advancement of pharmaceutical industry, hospitals and other health-care institutions, veterinary institutions pharmaceutical industries and uses in household need are the main economic sources or factors influencing emerging dissemination of PPs in the environment

Electrical and Thermo-Physical Properties of Hybrid Materials Made from Multi-Walled Carbon Nanotubes with Polymerized Thiophene Derivatives

The article deals with the development and characterization of conductive nanocomposites based on ENGAGE ethylene-octene copolymer (EOC) with octene content 17 wt%, filled with pristine multi-walled carbon nanotubes (MWCNTs) and these nanotubes functionalised by grafting oxidation polymerised poly(2,2’-bitiophene) groups (PBT-f-MWCNTs). thermo gravimetric analysis (TGA) of modified fillers confirmed the functionalization. The EOC composites with 0, 3, 5 and 10 wt.% final contents of pristine MWCNTs and PBT-f-MWCNTs were made by ultrasonication / thermoplastic mixing method and their stress-strain characteristics, electric and dielectric properties were compared as dependence of filler type. Due to the branched structure of poly(2,2’-bitiophene) attached to MWCNTs, the modulus of elasticity were lower for than that of EOC/MWCNTs, meanwhile the values over exceeded the rate of neat EOC. A notable increase of tensile strength with loading and the maximum deformation up to rupture indicated a compatibilizing effect of modified MWCNTs. The electric conductivity and electrical permittivity increased with filler content compared to neat EOC matrix; meanwhile, the PBT-f-MWCNTs showed an advance in higher conductivity compared to pristine MWCNTs. The linear change of PBT-f-MWCNTs may indicate the decrease of percolation threshold due to enhanced electric interaction of bitiophene moieties

Properties of PP/MWCNT-COOH /PP Composites made by Melt Mixing Versus Solution Cast /Melt Mixing Methods

An approach on improvement of the properties of polypropylene / carbon nanotube (PP/CNT) composites is reported. PP blend compositions with carboxylic acid functionalized multi-walled carbon nanotubes (MWCNT-COOH) at filler content 1.0 wt.% were researched. One part of the composites was manufactured by direct thermoplastic mixing PP with the filler, but the other one was made from solution casted masterbatch with the following thermoplastic mixing. An increase of mechanical properties (Young's modulus, storage modulus and tensile strength), compared to an increase of glass transition temperature indicated a reinforcement effect of CNTs on PP matrix, determined from the tensile tests and differential mechanical analysis (DMA), while the elongation was reduced, compared to PP matrix. By differential scanning calorimetry (DSC) analysis, the effect of nanofiller on the reorganization of PP crystallites was observed. A noticeable enhanced effect on increase of the crystallization temperature was indicated for masterbatch manufactured composite. An increase of thermal stability was also observed, compared to pristine PP and the composite made by direct thermoplastic mixing PP with the filler

Structure and Properties of Functionalized Carbon Nanotube/Polypropylene Composites

Structure, thermal, and mechanical properties were investigated for composite materials of polypropylene (PP) and acetic group functionalized multi-walled nanotubes (FCNT) at FCNT concentrations of 0.1%, 0.5% and 1.0% by weight. Part of the composites were compatibilized with maleic acid anhydride grafted polypropylene (PP-g-MA) at concentration of compatibilizer of 3 wt.%. Researched compositions were laboratory made from masterbatches of PP/FCNT and PP/PPg-MA/FCNT solutions in o-xylene, which were sonificated, precipitated in methanol, dried and melt mixed with the same matrix of PP. The compositions were compression moulded in to film samples. Structure changes and the properties of composites were researched by the methods of tensile tests, differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier infrared spectrometry (FTIR), and the measurements of dielectric characteristics. Effect of FCNT concentration in compositions as well as the effect of PP-g-MA compatibilizer was researched in detail

Влияние радиационной модификации и постоянного магнитного поля на деформационные свойства смесевого полимерного композита

Представлены результаты экспериментального исследования радиационно-модифицированного смесевого композита полиэтилена высокой плотности с хлорированным полиэтиленом при воздействии постоянного магнитного поля с индукцией, равной 0,7, 1,0, 1,4 и 1,8 Тл. Предварительное облучение образцов γ-излучением проведено до поглощенной дозы, равной 50, 100 и 200 кГр (10 кГр = 1 Мрад). Основное внимание уделено исследованию деформационных (упругих и вязкоупругих) свойств материала. Получены данные о влиянии величины индукции магнитного поля и поглощенной дозы γ- излучения на модуль упругости материала и ползучесть при воздействии постоянного напряжени