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Hydrogen production and its storage from solar energy

Doğan E. E.

Advances in Materials Science

2020

Vol. 20, nr 2(64)

14--25

The aim of this study is to increase the energy efficiency of the solar panel, to make the waste heat generated under the panel efficient and to store the electrical energy produced from solar panels in the form of hydrogen in boron nitride and boron carbide. Characterization of boron nitride and boron carbide was carried out with Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), differential thermal and thermogravimetric analysis (DTA/TG), Brunauer–Emmett–Teller (BET) and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM/EDX). The specific surface areas and pore sizes of the boron nitride and boron carbide were determined as 78 and 20 m2/g; and 3.8 and 11.1 nm, respectively. DTA/TG thermograms showed that boron nitride degraded in one step in the temperature range of 30-550°C and boron carbide degraded in two steps. From experimental studies, approximately 8.7% energy efficiency was achieved and hydrogen energy was costless produced from a renewable energy source excluding system costs. Moreover, it was found that 276% and 208% more hydrogen could be stored in the boron compounds, the boron nitride had more hydrogen storage capacity, and the electrical efficiency of the panel was increased.

Badania nad terapią BNCT w Polsce i na świecie

Knake Natalia, Maciak Maciej, Maliszewska-Olejniczak Kamila, Tymińska Katarzyna, Murawski Łukasz, Madejowski Gaweł, Wójciuk Karolina, Michaś Edyta, Wojtania Grzegorz, Kuć Michał, Dróżdż Agnieszka, Gryziński Michał A.

Inżynier i Fizyk Medyczny

2019

Vol. 8, nr 4

289--295

Przy Reaktorze MARIA w Narodowym Centrum Badań Jądrowych (NCBJ) powstaje stanowisko do badań nad terapią borowo-neutronową (BNCT). Terapia polega na napromienianiu nowotworu wiązką neutronów o odpowiednich parametrach po uprzednim podaniu pacjentowi związku boru, który w wyniku określonych mechanizmów gromadzi się głównie w komórkach rakowych. W wyniku reakcji 10B(n,α)7Li emitowane są cząstki jonizujące powodujące zniszczenie tylko tych komórek, w których zgromadzony jest bor [1]. Badania kliniczne prowadzone na świecie potwierdzają skuteczność metody, otwierając nowe perspektywy dla jej zastosowania w terapii konwencjonalnej.

The stand for research on Boron Neutron Capture Therapy (BNCT) at the MARIA Reactor at the National Centre for Nuclear Research is being created. The therapy consists of irradiation of the tumour with a neutron beam with specific parameters after prior administration of the boron compound to the patient, which accumulates mainly in cancer cells as a result of specific mechanisms. As a result of 10B(n,α)7Li reaction, ionising particles are emitted and destroy only those cells, in which boron is accumulated. Clinical trials conducted in the world show relatively high efficiency of BNCT, opening new perspectives for its use in conventional therapy.

Assessment of the phytoremediation efficacy of boron-contaminated waters by Salvinia natans

Hołtra A., Traczewska T. M., Sitarska M., Zamorska-Wojdyła D.

Environment Protection Engineering

2010

Vol. 36, nr 4

87-94

Local excesses of acceptable concentrations of boron in the aquatic environment may have negative impact on aquatic ecosystems, thus posing potential health hazards to humans and animals. The chemical methods commonly used for the treatment of surface waters may be successfully replaced by phytoremediation processes. Phytoremediation consists in accumulation of the contaminants in biomass, thus bringing the aquatic environment to conditions acceptable from the standpoint of legal regulations. Salvinia natans is an established bioaccumulator of metals from aquatic environments. The goal of this study was to verify the efficacy of the test species (Salvinia natans) in bioaccumulation of boron in Polish climate conditions. The experiment was conducted in waters contaminated with 1, 3, 6 and 8 mg B/dm3 for five days. Boron mass balance and biomass accumulation were evaluated at the final stage of the experiment. Biochemical analysis of the organic matter revealed changes in plants occurring as the result of boron accumulation.