1. Magnetic and electric field accelerate Phytoextraction of copper Lemna minor duckweed
- Author
-
Natalia Politaeva and Vladimir Badenko
- Subjects
Leaves ,Applied Microbiology ,Plant Science ,010501 environmental sciences ,Reuse ,Heavy Metals ,Toxicology ,Pathology and Laboratory Medicine ,01 natural sciences ,Physical Chemistry ,Electricity ,Medicine and Health Sciences ,Toxins ,0303 health sciences ,Multidisciplinary ,Physics ,Plant Anatomy ,Magnetism ,Pulp and paper industry ,Condensed Matter Physics ,Environmentally friendly ,Pollution ,Chemistry ,Biodegradation, Environmental ,Wastewater ,Electric Field ,Physical Sciences ,Engineering and Technology ,Medicine ,Sewage treatment ,Bioremediation ,Research Article ,Biotechnology ,Chemical Elements ,Environmental Engineering ,Science ,Toxic Agents ,chemistry.chemical_element ,Bioengineering ,Microbiology ,03 medical and health sciences ,Environmental Biotechnology ,Copper extraction techniques ,Cations ,Araceae ,030304 developmental biology ,0105 earth and related environmental sciences ,Ions ,Lemna minor ,Magnetic Phenomena ,Ecology and Environmental Sciences ,Water Pollution ,Biology and Life Sciences ,Copper ,Phytoremediation ,Magnetic Fields ,chemistry ,Environmental science ,Water Pollutants, Chemical - Abstract
In accordance with the opinion of the World Health Organization and the World Water Council the development of effective technologies for the treatment of wastewater from heavy metals for their discharge into water bodies or reuse is an urgent task nowadays. Phytoremediation biotechnologies is the most environmentally friendly and cheapest way of the treatment of wastewater, suitable for sustainable development principals. The main disadvantage of the phytoremediation is the slow speed of the process. A method for accelerating the process of phytoremediation by the combined effect of magnetic and weak electric fields is proposed. The purpose of this study is to determine the values of the parameters of the magnetic and weak electric fields that are most suitable for extracting cuprum ions from wastewater using the higher aqua plants (Lemna minor). A corresponding technological process based on the results of the study is proposed. The results have shown that the removal of copper cations from sulfate solutions effectively occurs in the initial period of time (1–5 hours) under the influence of a magnetic field with an intensity of H = 2 kA/m. Under the combined influence of an electrical current with density j = 240 μA/cm2 and a magnetic field (H = 2 kA/m) the highest rate of copper extraction by duckweed leaves is achieved. Under these conditions, the greatest growth and development of plant leaves occurs. The paper presents the results of determining of the parameters of the electrochemical release from the eluate of the spent phytomass of duckweed. It has been determined that the release of metal occurs at E = 0.32 V. An original scheme for wastewater treatment from copper with subsequent separation of copper from the spent phytomass of duckweed is proposed. In general, the presented results are a scientific justification of wastewater treatment technologies and a contribution to resolving the crisis in the field of fresh water supply. An important contribution in the circular economy is a technology recommendation proposed for recovering copper from duckweed after wastewater treatment.
- Published
- 2021