Real Waste Research Articles

Comminution of single real waste particles in a swing-hammer shredder and axial gap rotary shear

Comminution plays an essential role in waste preparation. Most wastes can be classified as non-brittle and heterogeneous materials. The breakage behavior of the components and the individual particles strongly influences the comminution of such materials, so it is necessary to understand each component's breakage behavior under different stresses to develop heterogeneous materials' comminution. Therefore, single-particle comminution tests of real wastes– PET bottle, cardboard, textile, detergent (HDPE) bottle- in a swing-hammer shredder and axial gap rotary shear were carried out. The breakage probability was used to describe the effect of the stress type and stress velocity on the different material types. The applicability of the results in the shredders' operation and design was introduced. In swing-hammer shredder, the PET, HDPE, and textile are complicated, while cardboard is easy to break. The rotor velocity has a strong influence on the breakage probability of all three materials in the hammer shredder; the higher the velocity, the lower the stress number for a certain breakage probability, while in the axial gap rotary shear, no clear correlation was observed.

Processing of agricultural apple fruit waste into sugar rich feedstocks for the catalytic production of 5-HMF over a Sn Amberlyst-15 resin catalyst

In this study we considered processes of treatment of agricultural apple waste which is normally discarded. We show the effect of various pre-treatment procedures on the final catalytic performance to produce 5-HMF from this real world biomass waste. Our study of the various potential pre-treatment steps, and their effect on the catalytic performance, provides valuable new insights which can be used for the development of new processes for the localised small scale valorization of agricultural fruit waste. The apple waste is aimed to be converted into a sugar rich feedstock stream for the catalytic conversion to 5-hydroxymethyl furfural (5-HMF) at low temperatures (∼120°C). Filters with varying pore sizes were studied for the filtration of apple pomace after milling the rotten apples in order to reduce the solids content. The tested filters varied in pore sizes of 0.2μm, 2μm and 54μm. The effect of heating, acid or base treatment of the apple slurry was evaluated for increasing the speed of filtration. The highest flow rate was obtained for the filter with 54μm pores. The sugar rich filtrates were investigated in the catalytic conversion to 5-HMF over an easy-to-manufacture Sn exchanged resin (Amberlyst-15) catalyst. Results showed that filtrates obtained over a 2μm filter lead to the highest 5-HMF yields (18 %) without extra additives. Adjustment of the reaction mixtures to pH 7 resulted in a lower catalytic activity. 5-HMF is proposed to be extracted from the aqueous layer by using an organic liquid layer (methyl isobutyl ketone, MIBK). In order to increase the diffusion of 5-HMF to the MIBK layer the addition of salts to the reaction mixture was investigated. This leads to lower catalytic activity, possibly due to catalyst deactivation. Our results showed that a relatively wide pore filter (54μm) provides the fastest apple processing method and a filtrate reacting to the highest 5-HMF yield in catalytic conversion of the sugar rich product stream obtained from agricultural waste apples.

Efficient photoelectrochemical sensor of Cu2+ based on ZnO-graphene nanocomposite sensitized with hexagonal CdS by calcination method

A novel ternary nanocomposite of CdSH/ZnO-GE was prepared for photoelectrochemical (PEC) selective sensing of Cu2+. ZnO nanorods and graphene (GE) nanosheets were first decorated on Ni foam (NF) simultaneously by a facile hydrothermal method and then CdS nanoparticles were loaded on ZnO-GE arrays through simple chemical bath deposition (CBD) method and following calcination process to form hexagonal CdS (CdSH). The obtained CdSH/[email protected] sensor was characterized by scanning electron micrographs, X-ray diffraction and X-ray photoelectron spectroscopy. The CdSH/[email protected] electrode exhibited enhanced photoelectrical activity with a photocurrent density of 6.8 mA·cm−2 under illumination at 0.5 V vs. SCE. For the PEC detection of Cu2+, the as-prepared sensor exhibited a low detection limit of 0.03 μM and wide linear concentration rang of 0.2 μM to 1 mM with high selectivity and stability. It was successfully applied to the detection of Cu2+ in real industrial waste water and sea water, suggesting that the CdSH/[email protected] electrode is a promising sensor to detect copper pollution in natural environments.

Decrease in the activity of irradiated graphite and liquid radioactive waste

Nowadays, the problem of nuclear waste deactivation is very urgent. The method proposed consists of exposing the aqueous solution of radionuclide to powerful nanosecond electromagnetic pulses by placing the treated solution between two electrodes connected to the outlets of the generator. Single-pole current pulses with a length of 1 ns, an amplitude of more than 5 kV, and a repetition frequency of 1 kHz are used. Such pulses can be obtained from the generator units with an amplitude of 5 kV to 15 kV. They have a pulse capacity of 1 to 4 MW, and the mains capacity is below 50 W. The pulse action leads to radiolysis of water and accelerated decay of radionuclides. As a result of radiolysis, hydrated electrons, hydrogen atoms, and various radicals are formed that causes precipitation of radionuclides, such as 137Cs and 90Sr. The description of several experiments and results of experimental investigations of the influence of powerful nanosecond electromagnetic pulses on the properties of water solutions with radioactive nuclides 137Cs and 90Sr and on items of irradiated graphite is presented. Under the influence of pulses on real liquid waste and aqueous solutions, radioactive nuclides in water are reduced by 5 to 50 times during 15 minutes. The effect described is preserved for 20 days. The reduction of beta activity twice during 25 min is observed in big blocks of the irradiated graphite. Flow-through unit for processing of liquid waste is developed, tested, and patented (RU 2726145. MPK G21F 9/28, July 7, 2020). This technology can be used to treat emergency solutions with tritium at Fukushima NPP. of the irradiated graphite.

Liquid Low-Level Radioactive Waste Treatment Using an Electrodialysis Process.

In this work, the possibility of using electrodialysis for the treatment of liquid low-level radioactive waste was investigated. The first aim of the research was to evaluate the influence of the process parameters on the treatment of model solutions with different compositions. Subsequent experimental tests were conducted using solutions containing selected radionuclides (60Co and 137Cs), which are potential contaminants of effluents from nuclear power plants, as well as components often found in waste generated from industrial and medical radioisotope applications. The results of the experiments performed on real radioactive waste confirmed that electrodialysis was a suitable method for the treatment of such effluents because it ensured high levels of desalination and rates of decontamination. The most important parameters impacting the process were the applied voltage and electrical current. Moreover, this research shows that the application of the ED process enables the separation of non-ionic organic contaminants of LLW, which are unfavorable in further stages of waste predisposal.

Ionic imprinted CNTs-chitosan hybrid sponge with 3D network structure for selective and effective adsorption of Gd(III)

From economical and environmental standpoint, it is very meaningful for selective recovery of Gd(III) via adsorption from the real waste solution. At present, conventional adsorbents are impeded by poor adsorption capacity, low selectivity, complicated preparation and eco-pollution. To this end, a novel imprinted CNTs-chitosan hybrid sponge (COOH-CNTs/CS-IIS) with 3D network structure was fabricated via easy polymerization-lyophilization method for selective adsorption of Gd(III). The imprinting sites dispersing on the surface of channels in COOH-CNTs/CS-IIS can achieve the selective adsorption to Gd(III) and improve adsorption capacity. The combining of biomass chitosan sponge with oxidized CNTs not only further enhances the adsorption capacity and mechanical strength of COOH-CNTs/CS-IIS but also actualizes its rapid retrieval by the squeeze of elastic sponge. Systematic adsorption tests indicate that COOH-CNTs/CS-IIS has a maximum adsorption capacity of 71.95 mg g−1, and can adsorb 88.9% of the ultimate adsorption within 60 min. The selectivity tests show that COOH-CNTs/CS-IIS exhibits preferential adsorption for Gd(III) with a distribution coefficient of 0.656 L g−1. Furthermore, COOH-CNTs/CS-IIS has excellent regeneration performance. Considering its cost-effectiveness, eco-friendliness, user-friendliness, easy preparation and favorable adsorption performance, COOH-CNTs/CS-IIS holds great promise in selective recovery of Gd(III) from the real waste solution.

Purification of Wastewater from Biomass-Derived Syngas Scrubber Using Biochar and Activated Carbons.

Phenol is a major component in the scrubber wastewater used for syngas purification in biomass-based gasification plants. Adsorption is a common strategy for wastewater purification, and carbon materials, such as activated carbons and biochar, may be used for its remediation. In this work, we compare the adsorption behavior towards phenol of two biochar samples, produced by pyrolysis and gasification of lignocellulose biomass, with two commercial activated carbons. Obtained data were also used to assess the effect of textural properties (i.e., surface area) on phenol removal. Continuous tests in lab-scale columns were also carried out and the obtained data were processed with literature models in order to obtain design parameters for scale-up. Results clearly indicate the superiority of activated carbons due to the higher pore volume, although biomass-derived char may be more suitable from an economic and environmental point of view. The phenol adsorption capacity increases from about 65 m/g for gasification biochar to about 270 mg/g for the commercial activated carbon. Correspondingly, service time of commercial activated carbons was found to be about six times higher than that of gasification biochar. Finally, results indicate that phenol may be used as a model for characterizing the adsorption capacity of the investigated carbon materials, but in the case of real waste water the carbon usage rate should be considered at least 1.5 times higher than that calculated for phenol.

Pre-irradiation grafting of acrylic acid and sodium styrene sulfonate on non-woven polyethylene fabric for heavy metal removal

In present study acrylic acid (AAc) and sodium styrene sulfonate (SSS) were grafted onto non-woven polyethylene fabric using pre-irradiation method and the grafted adsorbent is employed for Cr(III) and Pb(II) adsorption. After irradiation of the non-woven polyethylene fabrics with 50 kGy radiation dose the grafting reaction was carried out at 80º C with monomer solution consisted of 30% AAc, 10% SSS and 4% NaCl in water. A high graft yield of 270% was achieved. Fourier Transform Infrared, Scanning Electron Microscopy and Thermo-gravimetric Analysis were used to analyze the adsorbent. Pb (II) and Cr (III) adsorption from synthetic aqueous solution was attempted by the grafted adsorbent. Adsorption study was accomplished by changing the contact time, pH and initial metal ion concentration. Contact time 48 h and initial metal concentration 1000 ppm were found optimum for all the metal ions studied. pH 6.2 and 5 was observed best for Pb (II) and Cr(III) adsorption respectively. Kinetic adsorption data fitted better with pseudo-second-order equation than pseudo-first-order. Good correlation of experimental data with Langmuir isotherm model suggested monolayer adsorption. Langmuir equation showed that the maximum adsorption capacity for Pb (II) was 38.46 mg g-1 and Cr (III) was 111.11 mg g-1. Experiment on desorption of metal ions and reuse of the adsorbent depicted good results. Adsorbent also showed efficient adsorption of Cr(III) from real waste water. From all the findings it can be expected that the AAc-SSS grafted PE fabric can successfully eliminate Cr(III) and Pb(II) from industrial waste water.

Chemical Recycling of WEEE Plastics—Production of High Purity Monocyclic Aromatic Chemicals

More than 200 kg real waste electrical and electronic equipment (WEEE) shredder residues from a German dismantling plant were treated at 650 °C in a demonstration scale thermochemical conversion plant. The focus within this work was the generation, purification, and analysis of pyrolysis oil. Subsequent filtration and fractional distillation were combined to yield basic chemicals in high purity. By means of fractional distillation, pure monocyclic aromatic fractions containing benzene, toluene, ethylbenzene, and xylene (BTEX aromatics) as well as styrene and α-methyl styrene were isolated for chemical recycling. Mass balances were determined, and gas chromatography–mass spectrometry (GC-MS) as well as energy dispersive X-ray fluorescence (EDXRF) measurements provided data on the purity and halogen content of each fraction. This work shows that thermochemical conversion and the subsequent refining by fractional distillation is capable of recycling WEEE shredder residues, producing pure BTEX and other monocyclic aromatic fractions. A significant decrease of halogen content (up to 99%) was achieved with the applied methods.

Catalytic upcycling of waste plastics over nanocellulose derived biochar catalyst for the coupling harvest of hydrogen and liquid fuels.

A powerful simple biochar catalyst derived from nanocellulose was applied to the catalytic upcycling of waste plastics into H2 and liquid fuels for the first time. For the results from model low-density polyethylene (LDPE) pyrolysis, the C8-C16 aliphatics and monocyclic aromatics were dominant constitutes of the liquid product with the yields ranging from 22 to 68wt%. At the temperature of 500°C and biochar to LDPE ratio surpassing 3, the LDPE could be completely degraded into liquid and gas without wax production. A wax yield of 16wt% was observed at the temperature of 450°C and biochar to LDPE ratio of 4, which was dramatically lower than that (77wt%) from the absence of biochar at the temperature of 500°C. Up to 92vol% of H2 was detected in the gaseous product with a yield of 36wt%. The lower temperatures and higher biochar to LDPE ratios favored increasing the generation of H2 at the expense of light gas CnHm especially CH4. Moreover, this biochar catalyst was tested effectively to convert the real waste plastics including grocery bags and packaging tray into valuable liquid and H2-enriched gas.

Hydrogen rich products from waste HDPE/LDPE/PP/PET over Me/Ni-ZSM-5 catalysts combined with dolomite

This work focuses on the pyrolysis-gasification of real waste polymers in one stage tubular reactor with and without catalyst at 550 °C and 850 °C. Moreover, the possibility for dry reforming by in situ CO2 generation was also investigated using dolomite. To enhance the syngas production from waste plastics, Ni/ZSM-5 catalyst was synthetized by wet impregnation with 4.82% of Ni, then the catalyst was loaded by further elements in ~2% concentration (Ca, Ce, La, Mg, and Mn). The composition of gases and liquid products was measured by gas-chromatography, while the coke deposition on the spent catalysts was followed by temperature-programmed oxidation. It was found that a large amount of amorphous carbons was produced at 550 °C with Ni/ZSM-5 catalyst. The in-situ addition of the carbon-dioxide can enhance the production of syngas because both the hydrogen and carbon-monoxide concentration can drastically increase. Furthermore, the carbon deposition on the catalyst surface can be reduced by using dolomite. Based on the results of the various Me/Ni/ZSM-5 catalysts, the Ce/Ni/ZSM-5 was the most promising catalyst for the production of syngas (122.6 mmol/g at 850 °C). While, Mg/Ni/ZSM-5 showed less effect on the decomposition reaction, as low syngas yield was produced (62.8 mmol/g at 850 °C). The maximum yield of pyrolysis oil was achieved at 550 °C for the process without the catalyst.

An integrated approach for the HCl and metals recovery from waste pickling solutions: pilot plant and design operations

Continuous regeneration of industrial pickling solutions and recovery of valuable materials are implemented in a pilot-scale plant including diffusion dialysis (DD), where HCl is recovered, membrane distillation (MD), where HCl is concentrated, and reactive precipitation (CSTR), where metal ions are recovered in different forms. The integration of the three processes allows to minimize waste streams generation and to accomplish a closed-loop process, thus increasing the environmental sustainability and economic impact of the galvanizing industry. Process reliability was proved through the operation of a demonstrator in the real industrial environment of the Tecnozinco SrL hot-dip galvanizing plant (Carini, Italy), assessing the actual performance in fully reducing spent pickling solution disposal and recovering useful compounds. Tests were conducted firstly with synthetic solutions and then with real waste liquors from the pickling plant. A high acid recovery (80%) can be achieved in the diffusion dialysis unit and quantitative metals separation was accomplished, with iron hydroxide produced at 99% purity. The membrane distillation performance suffers when metal salts are present in large quantities, due to the “salting out” effect, resulting in reduced water vapor pressure, though the use of available low grade waste heat allows energy-sustainable operation of the MD.

Multi-biological combined system: A mechanistic approach for removal of multiple heavy metals

In this work, interactions of diverse fungal species by the manipulation of cell concentrations has been utilized as the driving feature for the removal of hazardous multi-metals from the aqueous solutions. This study is focused on the exploitation of internal structures of microbes as a repository of lead (Pb(II)) and nickel (Ni(II)). For the concerned purpose 24 heavy metal resistant fungi are isolated from different industrial waste sites to form different microbial combinations as a single unit ‘consortia’ for achieving highest possible removal rates. Polymerase chain reaction and DNA sequencing are involved for the biochemical characterization and phylogenetic analysis of the screened isolates. The identification and screening studies reveal isolated strains as two Pb resistant fungi viz. K1SF-Pb15 (Aspergillus terreus) and SEF-Pb (Talaromyces islandicus) which have shown metal removal up to 93% and two Ni(II) tolerant fungal isolates namely, MEF-Ni-11 (Neurospora crassa) and Ni-1 (Aspergillus flavus) with removal efficiency of more than 91%. Relationship has been validated between the biosorption capacity and efficiency of the novel consortium under the influence of variable pH, time duration, initial concentration of Pb(II) and Ni(II), and inoculum size which has led to the foundation of effective and economical parameters for its exploitation in practical fields. The fungal consortia when applied on various industrial effluents has exhibited more than 95% of removal for both Pb(II) and Ni(II) simultaneously. The detailed mechanistic insight has shown the involvement of physical, chemical and ionic forces for the removal of heavy metals. So the designed novel multi-biological combined system acted as a repository for Pb(II) and Ni(II) ions with a greater potential which can be guided by the mechanistic methodology for the retrieval and remediation of multiple heavy metals from the real waste water samples.

Influence of real and synthetic municipal solid waste leachates on consolidation and shear strength behaviour of bentonites.

For safe disposal of wastes in landfills, compacted bentonite is recommended as bottom liners due to their significant cation exchange (CEC) and swelling capacity, low permeability and large specific surface area (SSA). The present investigation carried out various experimental studies determining the compressibility behaviour and unconfined compressive strength (UCS) of two different compacted bentonites in the presence of municipal solid waste (MSW) and synthetic MSW leachates. Various examinations were conducted determining alterations in consolidation parameters like the coefficient of consolidation (cv), time taken for 90% consolidation (t90) and compression index (Cc) with both leachates. The outcomes reveal that Cc and t90 values of both bentonites declined; however, cv value rose. Results also indicated that under any given consolidation pressure, a lesser void ratio was achieved for leachates. UCS of both bentonites reduced with leachates' interaction yet, lying within the recommended a value higher than 200 kPa. A comparative assessment of the two bentonites displayed that bentonite having higher CEC and swelling capacity, and SSA unveiled more excellent Cc and t90 values and a reduction in the UCS. A higher variation in behaviour of bentonites was perceived in the existence of MSW leachate in comparison to synthetic MSW leachate.

Understanding metal dissolution from solar photovoltaics in MSW leachate under standard waste characterization conditions for informing end-of-life photovoltaic waste management

The upcoming end-of-life solar photovoltaics (PV) waste stream is a huge concern before solid waste professionals due to presence of hazardous metals like lead or cadmium. The objective of present study was to understand the metal dissolution from PVs under four standard waste characterization regulatory tests of U.S., Germany, and Japan and their representativeness with actual landfill leachate. Modules were exposed to real municipal solid waste (MSW) landfill leachate for extended extraction duration, agitation and diluted leachate to investigate the effect of various parameters on metal dissolution. The results indicated that extractions using landfill leachates resulted in lower metal release than standard methods. The leached metal concentrations were found to be within the threshold limits except for cadmium, copper, lead and selenium, with maximum lead release from amorphous-PV of 8.68 mg/L and 6.91 mg/L with respect to TCLP and WET tests, respectively. Arsenic showed negligible release with maximum concentration of 0.046 mg/L from copper indium gallium de-selenide(CIGS) PV. Regardless of small size (1–2 cm pieces) and agitation, Germany and Japan’s standard tests resulted in minimal release except of copper from copper indium gallium de-selenide PV. Leaching without agitation, showed negligible release from all photovoltaics whereas when agitation is applied to diluted leachate, significant release was observed with aluminum and copper leached up to 145.32 mg/L (multi-crystalline silicon) and 139.01 mg/L (amorphous-PV), respectively. CIGS was found to be most hazardous with a Metal Hazard Score (calculated on the basis of magnitude of leached metals with respect to their threshold limit and subsequent health effects) of 23.19, when exposed to standard tests. For all scenarios, increased metal release was observed with decrease in sample size and increase in leachate dilution and thus, leaching in highly acidic conditions are by no means representative for modules dumping in realistic conditions.

Assessment of density driven convection effect on the dynamics of contaminant propagation on a deep well radioactive waste injection disposal site

The influence of density driven convection is considered when injecting high density solutions into deep aquifers on a radioactive waste injection site. The proposed mathematical model allows to take into account confined and unconfined flow regimes, variable solute density and dual porosity of the media. Time discretization is based on full implicit scheme with Picard iterations applied to solve arising nonlinear problems. The importance of density driven convection effect is studied on a 3D model of a real waste deep injection site. Also the influence of dual porosity concept and dispersion process on waste propagation is addressed.

Magnetic mesoporous sodium citrate modified lignin for improved adsorption of calcium ions and methylene blue from aqueous solution

A novel magnetic lignin-based adsorbent modified with sodium citrate (L-SC@Fe3O4) was simply manufactured by one-step hydrothermal method to eliminate calcium ions and methylene blue from aqueous solution. Various characterization methods were applied to explore the structural morphological features of the obtained sample. The as-designed adsorbent possessed high specific surface area, rough surface and rich mesoporous structure. Adsorption experimental data accorded with the Langmuir isotherm with maximum adsorption amount of 339.4 mg/g and 281.4 mg/g for calcium ions and methylene blue, respectively. Kinetic data fitted well with the pseudo-second-order model. Furthermore, the adsorption mass transfer process of calcium ions and methylene blue was predicted by the pore volume diffusion model, virtually governed by intraparticle resistance. The adsorbent showed considerable efficiency toward calcium ions and methylene blue within a broad pH range of 4–8 and 4–10, separately. The resulting adsorbent also exhibited strong anti-salts interference and possessed good regenerability with magnetic separation feasibility. Altogether, the tailor-made magnetic adsorbent is promising as an efficient and sustainable adsorbent for calcium ions and methylene blue removal, illuminating the future design of competent adsorbents for scavenging metal ions and dyes from real complex waste liquid.

Direct Conversion of Food Waste Extract into Caproate: Metagenomics Assessment of Chain Elongation Process.

In a circular economy strategy, waste resources can be used for the biological production of high added-value substances, such as medium chain fatty acids (MCFAs), thus minimising waste and favouring a sustainable process. This study investigates single-stage fermentation processes for the production of MCFAs in a semi-continuous reactor treating the extract of real food waste (FW), without the addition of external electron donors. Two sequential acidogenic fermentation tests were carried out at an organic loading rate (OLR) of 5 and 15 gCOD L−1d−1 with a hydraulic retention time of 4 days and pH controlled at 6 ± 0.2. The highest level of caproate (4.8 g L−1) was observed at OLR of 15 gCOD L−1d−1 with a microbiome mainly composed by lactate-producing Actinomyces, Atopobium, and Olsenella species and caproate-producing Pseudoramibacter. Metagenomic analysis revealed the presence of key enzymes for the production of lactate, such as lactate dehydrogenase and pyruvate ferredoxin oxidoreductase, as well as several enzymes involved in the reverse β-oxidation pathway, thus suggesting the occurrence of a lactate-based chain elongation process.

Parametric optimization by Box–Behnken design for synthesis of magnetic chitosan-benzil/ZnO/Fe3O4 nanocomposite and textile dye removal

In this research work, a new magnetic Schiff's base-chitosan-Benzil/zinc oxide/Fe3O4 nanocomposite (Cs-Bz/ZnO/Fe3O4) was developed to be a promising and recoverable adsorbent for Remazol Brilliant Blue R dye (RBBR) removal from the aquatic environment. Parametric optimization by Box–Behnken design was made to optimize the synthesis condition (loading ZnO nanoparticles into polymeric matrix of Cs) in addition to adsorption operation parameters (adsorbent dose, solution pH, temperature, and contact time). The obtained results show that the fast RBBR removal (98.8%) can be achieved by loading 25% ZnO nanoparticles into polymeric matrix of Cs (Cs-Bz/ZnO-25/Fe3O4), and at optimum adsorption operation parameters (adsorbent dosage of 0.04 g, solution of pH 4, temperature of 60 °C, and contact time of 10 min). At these optimum conditions, the maximum adsorption capacity was found to be 620.5 mg/g. The best isotherm and kinetic models were Freundlich model and pseudo-second-order kinetic model, respectively. The probable RBBR dye adsorption mechanism can be assigned to various types of physicochemical interactions (i.e; electrostatic, n-π, π-π interactions) in addition to hydrogen bonding and Yoshida H-bonding. The output of this research confirms that Cs-Bz/ZnO-25/Fe3O4 is a superior, recoverable, and environment friendly biohybrid nanocomposite adsorbent. The remarkable output of this research can open a window for other possible significant applications such as tenement of real waste water, removal of heavy metal ions, and reduction of chemical oxygen demand.

Study on the adsorption of strontium on granular manganese oxide

A number of optimal parameters determining the efficiency and rate of the strontium removal by a granular sorbent synthesized by the interaction of KMnO4 and concentrated H2O2 solution have been determined. The optimal drying temperature was found to be 400 °C at an average grain size of 0.1–0.2 mm. The average value of the strontium distribution coefficient in seawater equaled to 1.4–1.5 × 103 mL/g at the V/m ratio of 1000 mL/g ratio. The maximum value of adsorption in a single-component solution calculated using the Langmuir equation was equal to 1.0–1.1 mmol/g and corresponded to total dynamic exchange capacity. As the number of sorption-desorption cycles increased, total dynamic exchange capacity gradually decreased. The efficiency of Sr-90 removal from real liquid radioactive waste streams has been evaluated.