Bioaccumulation of Cu, Fe, Mn and Zn in native Brachystegia longifolia naturally growing in a copper mining environment of Mufulira, Zambia

Experimental Study on the Hydroponics of Wetland Plants for the Treatment of Acid Mine Drainage

“…Table 5 shows the metal concentrations and bioconcentration factors (BCFs) of six plants in C3 water samples. The BCF indicates the ability of plants to enrich heavy metals from their surroundings [33], and it could be seen that the BCFs of six plants for each metal were greater than one, indicating that the accumulation of metals in plant tissues was greater than that in the growth medium, so all six plants could be used for phytoextraction of Mn, Zn, and Cd [34]. The order of BCF for most of the plants (except P. australis) was Mn > Cd > Zn, which indicated that Mn was more readily absorbed by plants, thus explaining the decrease in Mn removal in AMD due to the poor growth state of plants at the later stages of the experiment.…”

Antibacterial and plant growth-promoting properties of novel Fe3O4/Cu/CuO magnetic nanoparticles

“…The experiment was repeated four times and the results were averaged. The equation of calculation is as followed eqn (2).…”

“…To enhance plant development, Fe and Cu ions can speed up the production of superoxide dismutase, ascorbate oxidase, and chlorophyll. 2,7,[11][12][13] Because of the wrapping of the seed coat, seeds are in anaerobic respiration during the early stages of germination. When FC is administered at a concentration less than 10 g mL À1 , it reacts with medium water to form ROS to oxidize the seed coat, causing the seed coat to rupture and allowing the seed to start the aerobic respiration process, hence speeding seed germination.…”

“…3,4,[6][7][8] Cu 2+ is the primary component of commercial inorganic antibacterial agents such as Bordeaux mixture, green depot, and double spirit, which are extensively used in agriculture, forestry, and animal husbandry as a disposable dosage for disease prevention and control. 2,3,5 Cu 2+ ions can adsorb on the surface of bacteria, destroying the potential difference between the surface membrane and the bacterial cell walls. 9,10 When paired with a sulfur iron cluster in the cell membrane, trace levels of Cu 2+ can alter the secondary structure of the protein in the ion channel, resulting in the rupture of bacterial cell walls.…”

“…Copper ions, as trace elements in plants, are required for various physiological functions, including photosynthesis, cellular respiration, antioxidant defenses, and hormone signal transduction. [1][2][3][4][5][6] Due to its exceptional biocompatibility, it has a wide range of applications. According to their biological value, copper ions can not only boost plant development but also have antibacterial properties due to their toxicity.…”