Removal of Metals from Aqueous Solutions Using Sea Buckthorn Waste from Dietary Supplement Technology

Sustainability

CristinaIleana Covaliu¹  Lidia Kim²  Gina-AlinaCatrina (Traistaru)²  Georgiana Cernica²  Mariana Popescu³  Vasile Staicu³ 

[1] Faculty of Biotechnical Systems Engineering, University Politehnica of Bucharest, 060042 Bucharest, Romania;National Research and Development Institute for Industrial Ecology—ECOIND, 060652 Bucharest, Romania;S.C. Hofigal Export-Import S.A., 042124 Bucharest, Romania;

关键词: adsorbent materials;    metals;    removal efficiency;    vegetable waste;    valorization;   

DOI  :  10.3390/su13031441

来源: DOAJ

【 摘 要 】

The purpose of this study was to produce additional data for the valorization process of vegetable waste originating from dietary supplement technology. Two types of vegetable waste originating from different technological processes of sea buckthorn oil were used: vegetable waste from organic solvent extraction (P1) and vegetable waste from cold extraction (P2). Batch experiments evaluated the influence of pH, initial metal concentration, contact time, and Langmuir and Freundlich adsorption isotherms. The following pollutants—Cu, Cr, Co, Ni, Pb and Zn—from the wastewater were studied. The removal efficiency of metals from wastewater was evaluated at pH 3, 5 and 7. The highest metals removal efficiency was obtained at pH 5. It was observed that the Langmuir isotherm fits the adsorption process very well. Based on the results obtained, it can be concluded that vegetable waste resulting from the sea buckthorn oil industry could have potential applications for removing toxic metals from wastewater due to its high removal efficiency (>80%).

【 授权许可】

Unknown