Valorization of citrus fruit processing waste in order to obtain a natural plant sorbent for the removal of heavy metals

• Autorzy: Bejanidze Irina , Davitadze Nazi , Tavdgiridze Vakhtang , Didmanidze Nato , Nakashidze Nunu , Jakeli Eteri

Identyfikatory

DOI

10.12912/27197050/200514

• Języki publikacji: EN

Abstrakty

EN

The efficiency of technology is determined by the amount of waste. The purpose of this work - valorization of citrus fruit processing waste in order to obtain a natural plant sorbent for the removal of heavy metals; is the processing of waste - citrus peels, after squeezing the juices from them, to obtain effective sorbents for the removal of heavy metals. At the same time, ecological problems are solved - the ecological situation in the country is improved (utilization of waste and heavy metals) and the economic one - the company receives a high profit without any significant additional costs for the production of the sorbent. In addition to its practical significance, the project has scientific significance: for the first time, a technological scheme has been developed for the production of pectin and Na+-pectate sorbents in liquid and solid form from citrus processing waste: lemon, tangerine, orange and pomelo; For the first time, pectin isolates were concentrated using the baromembrane method of membrane technology - ultrafiltration, and this reduced the consumption of pectin precipitant by 12 times; was identified for the first time by high-performance liquid chromatography composition of pectin and sorbent obtained on its basis. The laws of sorption of divalent metal ions by pectin polysaccharides: their complexing ability with heavy metals from 0.02 M CuSO₄ ∙ 5H₂O, NiCl₂ ∙ 6H₂O, CoCl₂ ∙ 6H₂O, Pb (CH3COO) ₂ ∙ 3H₂O methods were studied by potentiometry and conductometry. To determine the kinetics of heavy metal sorption by the obtained liquid sorbent, the resulting mixture was left for 1, 2, 4, 6, 8, 12 and 24 hours. The structure of the sorbent is confirmed by IR spectra It was established that ion exchange plays an important role in the process of complex formation. Also found: similarity of sorption isotherms of copper and lead ions, influence of metal nature on sorption capacity of corresponding pectin polysaccharides; sorption activity of pectin polysaccharides in relation to lead ions higher than that of copper; The possibility of applying the linear equation of Langmuir in the wide range of concentrations of the external solution, for the estimation of the maximum capacity of the sorbent.

Słowa kluczowe

EN

waste; pectin; closed cycle; heavy metal; electrical conductivity; sorbent

• Wydawca: Lubelski Oddział Polskiego Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology ; WNGB Wydawnictwo Naukowe
• Czasopismo: Ecological Engineering & Environmental Technology
• Rocznik: 2025
• Tom: Vol. 26, iss. 4
• Strony: 34--49
• Opis fizyczny: Bibliogr. 33 poz., rys.

Twórcy

autor

Bejanidze Irina

• Department of Chemistry, Batumi Shota Rustaveli State University, 35/32 Ninoshvili/Rustaveli str. Batumi, GE 6010, Georgia

• https://orcid.org/0000-0002-8952-9861

autor

Davitadze Nazi

• LTD Batumi Water, 19 Tabukashvili str., Batumi, GE 6000, Georgia

autor

Tavdgiridze Vakhtang

• LEPL Laboratory Research Center, 80 Shvishevski str., Batumi, GE 6000, Georgia

autor

Didmanidze Nato

• Department of Chemistry, Batumi Shota Rustaveli State University, 35/32 Ninoshvili/Rustaveli str. Batumi, GE 6010, Georgia

autor

Nakashidze Nunu

• Department of Agroecology and Forestry Batumi Shota Rustaveli State University, 35/32 Ninoshvili/Rustaveli str., Batumi, GE 6010, Georgia

autor

Jakeli Eteri

• Department of Internal Medicine Batumi Shota Rustaveli State University, 35/32 Ninoshvili/Rustaveli str., Batumi, GE 6010, Georgia

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