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X-ray diffraction patterns for Mentha spicata L. (MS) and Ruta graveolens L. (RG) samples.

X-ray diffraction patterns for Mentha spicata L. (MS) and Ruta graveolens L. (RG) samples.

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Article
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Two biomaterials based on the abundant Bulgarian medicinal plants Mentha spicata L. (denoted as MS) and Ruta graveolens L. (denoted as RG) were investigated as environmentally friendly biosorbents for Cu(II) removal from aqueous solutions. Grain size distribution, slurry pH, texture parameters, thermal behavior and mineralogical composition of MS a...

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Context 1
... XRD patterns of the samples MS and RG (Figure 2) are typical for cellulosic materials. The content of the registered crystal phase exhibit peaks identified as crystalline forms of cellulose 1a ( Mutungi et al. 2012;Ara ujo et al. 2018). ...

Citations

... Among them, medicinal plants are of great interest because they contain numerous active phytochemicals which are prone to metal binding. They are low-cost and non-hazardous materials, abundant in nature, require little processing and are specifically selective for heavy metals [10][11][12]. ...
... No other physical or chemical treatment was performed on the material thus obtained. Particle size distribution was determined as described in [10]. After sample pretreatment, the resulting grain size distribution was shown to be practically monomodal with a maximum of approximately 100 mm average particle size and more than 90% of the particles were smaller than 157 mm. ...
Article
The efficiency of a material based on the plant Thymus vulgaris L. for Cu(II) removal from aqueous solutions is investigated. The estimation of optimal parameters influencing the Cu(II) adsorption was studied by the batch method. Optimum pH value was found to be about 4. Kinetic of Cu(II) adsorption was very fast. Equilibrium experimental data were fitted to linear isotherm and kinetic models. It was established that the Langmuir isotherm most adequately described the adsorption process. The possibility for desorption was also studied. The results showed that the investigated biosorbent has good potential for removal of Cu(II) from contaminated wastewaters.
... This can be explained by the process of adaptation of Trifolium pratense L. to growth conditions and, as a consequence, an increase in the level of biological resistance of plants to contamination. The property of Trifolium pratense L. to accumulate heavy metals can be used as one of the methods of phytomonitoring and phytoremediation of the environment (Ivanova et al., 2019) Considering the positive effect of growing leguminous perennial herbs on increasing soil fertility, it is possible to predict a decrease in the concentration of heavy metals in plants of subsequent crops in crop rotation after growing leguminous perennial herbs due to the increased accumulation in the tissues of leguminous perennial herbs of heavy metals and reduced their mobility due to the optimization of soil conditions by grasses ...
Article
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Goal. Assessment of the influence of growing leguminous perennial herbs on the intensity of heavy metals accumulation in winter wheat as in a subsequent crop rotation. Methods. Field, laboratory atomic absorption method, mathematical and statistical processing. Results. cultivation of winter wheat after precursors of Medicago sativa I., Trifolium pratense L., Onobrychis arenaria Kit., Melilotus albus L., Lotus corniculatus L. or Galéga orientalis Lam. leads to a decrease in the content of lead by 1.8-2.5 times, cadmium – by 1.7–2.6 times, copper - 2.2–4.6 times and zinc - 1.6–1.9 times compared to winter wheat after corn precursor on silage. To obtain winter wheat with a minimum lead and copper content, the optimal precursor is Onobrychis arenaria Kit., with a minimum cadmium content - Galéga orientalis Lam. precursor, with a minimum copper and zinc content - the Trifolium precursorpratense L. The lowest influence on the reduction of heavy metals accumulation in winter wheat grain is caused by the precursor Lotus corniculatus L. Thanks to the use of leguminous perennial herbs as a precursor to winter wheat, it is possible to reduce the accumulation coefficient of heavy metals by 1.1-2.9 times compared with the corn precursor on silage. The lowest accumulation coefficient of the studied heavy metals was observed after the precursor of Medicago sativa I. Conclusion. Leguminous perennial herbs - Medicago sativa I., Trifolium pratense L., Onobrychis arenaria Kit., Melilotus albus L., Lotus corniculatus L. and Galega orientalis Lam. promote optimization of soil condition by increasing the content of humus, minerals nutrients, optimization of soil acidity. As a result, they reduce the accumulation of heavy metals (lead, cadmium, copper, and zinc) in winter wheat as the next crop in crop rotation and contribute to the reduction of accumulation coefficient of heavy metals in winter wheat.
Article
Agro- and industrial processes that utilises medicinal and aromatic plants (MAPs) generates various kinds of residues like residual biomasses from distillation of aromatic plant and non-utilized parts of medicinal plant. These residual biomasses cannot be considered as waste as these can actually be recycled and converted into value added products. So, value addition to these residual biomasses through processing, extraction, hydrolysis, pyrolysis and fermentation, etc. could be an exciting avenue especially for the underutilized part of medicinal plant and residual biomass from the distillation of aromatic plant. These biomasses are suitable for isolation of phytochemicals like phenolics-antioxidants which can be used in pharmaceutical, cosmetic and perfumery industry. After extraction of phytochemicals, the residual biomass can be used directly as animal feed/or organic mulch. Besides, preparation of value added product, like bio sorbent for waste water purification, composts and biochar for an effective soil amendment. These value added products are found to be more promising. In this article, the potential uses of these residual biomasses as valued products have been discussed including the technology developed at laboratory scale and their application in industry. Effective recycling of residual biomass from MAPs is not only for an economic gain, but also a practical solution for its disposal. Thus, dual utilization of the residual biomasses is of great interest and will open windows of opportunity in MAPs sector.