Adsorption methods represent a common practice used for heavy metals removal from aqueous solutions. As adsorbent material, zeolites have an excellent adsorption capacity and present low environmental impact. The zeolite this study was synthesized fly ash, residue generated by thermal power plants, considering the need to reduce ash deposits transform it into useful materials as part of circular economy. Fly conversion performed via modified hydrothermal method. To investigate synthetic...

The per capita availability of freshwater resources on a global scale is gradually decreasing due to population growth, rapid urbanization, industrialization, and modern lifestyles. In this situation, wastewater management becomes major concern. Conventional treatment processes used treat discharges are not adequate for the advanced removal pollutants, especially refractory organic which mainly compounds that easily biodegradable in environment. use photocatalytic membrane reactors (PMRs)...

The increasing demand for efficient wastewater treatment technologies, driven by global population growth and industrialisation, highlights the necessity advanced, reliable solutions. This study investigated efficacy of a slurry photocatalytic membrane reactor (PMR) advanced removal organic pollutants, quantified via chemical oxygen (COD), under natural simulated solar light irradiation. Employing two variants iron-doped titania as photocatalysts polysulfone-based polymeric separation...

Photocatalytic degradation of carbamazepine (CBZ) from spiked aqueous solutions, via a UV/TiO2 system, was investigated, and the optimum photocatalyst type (P25 Degussa) dose (500 mg/L), as well irradiation time (45 min), were established. The process kinetics studied, rate constant 3.14 × 10-5 M min-1 calculated for CBZ, using Langmuir-Hinshelwood equation. Experiments performed in presence scavengers showed that main reactive species involved are holes free hydroxyl radicals; superoxide...

Abstract There is an increased interest in recycling valuable waste materials for usage procedures with high added values. Silica microparticles are involved the processes of catalysis, separation, immobilization complexants, biologically active compounds, and different nanospecies, responding to restrictive requirements selectivity various chemical biochemical processes. This paper presents surface modification accessible dimensionally controlled recycled silica microfiber titanium dioxide....

The article explains how to make thermoplastic construction materials by combining waste from chicken feathers with plastic waste. initial phase focused on a new and environmentally friendly method of sterilizing raw using microwave radiation inside sealed ovens circulating air. Additionally, composites containing varying feather amounts two different polymer matrices were fabricated through an injection process, followed mechanical physical tests the samples. Because their excellent...

Structural and hydrodynamic characteristics of polysulfone–polyaniline‐type membranes (Psf‐PANI) are depending on a number parameters. The present article details the influence upon such membrane obtaining process, type monomer used in generating composite pH solution permeating (for flow characterization). Membranes were obtained steady‐state using an inversion phase technique accompanied by situ chemical reaction. character material is result inserting, pre‐existing porous polymer...

Sustainable materials made from recycled are an alternative to traditional (synthetic ones) and present a lower environmental impact. Due the fact that natural fibers were successfully used produce environmentally friendly sound adsorbing materials, biocomposites polypropylene (PPR), feathers flour (FF) with / without compatibilizers (C) obtained characterized point of view their acoustical behavior. Obtained also morphological compositional by scanning electron microscopy thermal...

Cyclophosphamide (CP) is a commonly prescribed cytostatic drug that has cytotoxic, genotoxic, mutagenic, carcinogenic and teratogenic effects on living organisms, which asks for its elimination from any water source. The photocatalytic degradation of CP under UV-VIS irradiation was studied, using non-doped TiO2 Ag- doped (0.5-1.7% wt.). catalysts were synthesized by vacuum deposition method. influence Ag concentration the performance investigated an optimal content 1.0% established. Using...

Most frecquent used methods for recycling and treating plastic waste, with their advantages disadvantages were analysed investigated. Plastic waste present a slow degradation rate in nature, almost one thousand years, therefore it is important to address this type of pollution, by finding the most sustainable reducing percentage that ends up landfills or ocean. The negative impact include bioaccumulation organisms exposure micro nano plastics end environment from degrading macro directly...

Polysulfone (Psf) and Cellulose acetate (Ac-Cel) based membranes were synthesized via immersion precipitation–phase inversion techniques, starting from initial polymeric solutions with concentrations of 8%, 10%, 12%. Each membrane was characterized a morphological point view by scanning electronic microscopy compositional thermal analyses. Hydrodunamic characteristics also determined for all using both ultrapure water real municipal wastewater. Obtained results proved that polysulfone...

Ifosfamide (IF) degradation from aqueous system via UV-Vis Fe-TiO2 was studied for a photo catalyst dose of 200 mg/L and an irradiation time up to 240 min. IF efficiency monitored Liquid Chromatography-Mass Spectrometry technique (LC-MS). Experimental photocatalytic tests were performed both in the absence presence 2-propanol F- radicals� scavengers results proved that occurs most likely bulk solution. showed efficiencies varied between 39.52% 70.70% scavengers� absence. Six intermediates...

Trials on ciprofloxacin removal from real aqueous systems were performed using a photocatalytic membrane reactor with catalyst in suspension. Four sets of four treatment cycles carried out and experimental results processed the statistical point view order to assess reproducibility. Global efficiencies more than 99.85% obtained for all cycles. Coupling degradation process allowed separation reuse within further Statistical analyse data recommends use reactors as feasible option advanced...

The study is highlighting the possibility of modeling properties composite materials based on recycled polypropylene (PPR), flour feathers(FF), and compatibilizers (C). with 10% 20% feather content were mixed processed a two-stage extruder having four heating zones between 200-230�C, in order to obtain granules. granules injected various forms evaluate properties. have been evaluated for determination melt flow index (1900C; 2.16kg), density, Charpy impact, breaking strength, elongation at...

Bisphenol A (BPA) � an endocrine disruptor, degradation was studied using the following systems: UV/H2O2 and UV/H2O2/TiO2. Optimum operating conditions were established for both systems experimental results showed that two could be successfully used advanced of BPA achieving efficiencies 99.99% in optimum working conditions. The compared advantages disadvantages each system identified. Nine intermediates identified UV/H2O2/TiO2 a possible pathway proposed.

The article highlights the influence of poultry feather flour percentage and compatibilizers on dielectric properties composite materials based low density polyethylene matrix. behavior was determined in terms distribution basic polymer matrix, to optimize technology structure. results showed that addition thermoplastic matrix led an increase constant loss presence additives leads better dispersion processability material, observation supported by X-ray analysis.

2,4,6-Trinitrotoluene(TNT) is one of most common toxic pollutant identified in wastewater generated from ammunitions plants.Due to its potential carcinogenic characteristics, TNT presence water bodies represents a risk for human health and aquatic life.Among modern treatment methods, TiO2 photocatalysis was successfully applied order remove pollutants.Fe-TiO2 assisted photocatalytic degradation aqueous media, under UV-VIS irradiation studied.The effects operating parameters on process...

Waste represents one of the most important topics in field environmental protection due to induced pollution on all media (water, air and soil).From three known categories waste (inert, non-hazardous, hazardous), last rises serious issues from point view technical financial management.A special category hazardous according national regulations is represented by medical that cannot be disposed without adequate treatment.Experimental results obtained treatment bottom filter ashes resulted...

Cyclophosphamide (CP) - N,N-bis(2-chloroethyl)-1,3,2-oxazaphosphinan-2-amine 2-oxide and ifosfamide (IF) N,3-bis(2-chloroethyl)-1,3,2-oxazaphosphinan-2-amide degradation under UV-Vis/TiO2 photocatalysis was studied in the following experimental conditions: photocatalyst dose = 100 � 800 mg/L; irradiation time 30-360 min; initial pollutant concentration 1 50 mg/L. CP IF via TiO2 found to obey Langmuir Hinshelwood model pollutants rate constants: 5.89 x 10-6 M min-1 (CP); 4.86 adsorption...

The tested models of membrane transport were based on the steric, dielectric (Born and image force effects), Donnan exclusions.Generally, with concentration-dependent electrolyte permeability described retention data satisfactorily, irrespectively origin that dependence (dielectric or effect).Regarding steric-dielectric exclusion, same goodness fit was obtained for many pairs pore radius constant.However, it not possible to explain differences in permeabilities, because inconsistency...

The degradation of some toxic pollutants like chlorobenzenes, nitrobenzene and 4-chloroaniline in various advanced oxidation system such as: UV/ H2O2, UV-VIS/Fe-TiO2 UV-VIS/TiO2/ H2O2 were studied. influence working conditions (pH0, dose, photocatalyst pollutant initial concentration irradiation time) on rate constant efficiency investigated. For any studied systems, followed a pseudo first order kinetics. pathway chlorinated nitro aromatic includes •OH radicals attack to ring with...