DSpace Collection: Proceedings of SIMI 2021, ArticlesProceedings of SIMI 2021, Articleshttp://hdl.handle.net/123456789/17642024-03-26T20:04:55Z2024-03-26T20:04:55ZThe effect of toxic metal As on the Matricaria Chamomilla L. medicinal plantSerban, Ecaterina AncaVasile, Gabriela GeaninaGheorghe, StefaniaStoica, CatalinaCatrina, Gina AlinaDinu, Cristinahttp://hdl.handle.net/123456789/17852023-10-25T11:45:34Z2021-12-01T00:00:00ZTitle: The effect of toxic metal As on the Matricaria Chamomilla L. medicinal plant
Authors: Serban, Ecaterina Anca; Vasile, Gabriela Geanina; Gheorghe, Stefania; Stoica, Catalina; Catrina, Gina Alina; Dinu, Cristina
Abstract: The paper presents an experimental laboratory study of the bioaccumulation of the toxic metal
arsenic in the medicinal plant chamomile (Matricaria Chamomilla L.). The study makes a comparison regarding the bioaccumulation capacity of the chamomile plant in which arsenic is found as a unique contaminant, as well as in mixtures of 2, 3, or 4 toxic metals (Cd, Ni and Pb) on a natural soil enriched with metals, compared to the chamomile plant developed on an unpolluted substrate. The tests followed the effects of soil pollution with metals on the germination and development of chamomile. The experimental results indicated that arsenic does not bioaccumulate in the chamomile plant, remaining in the soil. The experiment that was an exception is the one with arsenic as the only contaminant (E1) in which at 90 days, the arsenic content in the chamomile plant was 3.58 mg/kg arsenic, the value that is within normal limits, below the phytotoxic value of 5 mg/kg, but was higher than that determined in the plant from the control test experiment (<0.75 mg/kg). The bioaccumulation factor (BCF) after 90 days, in all experiments, either by a combination of metals or a single contaminant had values lower than 1, indicating that the plant does not accumulate arsenic. The total chlorophyll from the results obtained indicates that the toxicity in the E1 experiment is higher than in the metal mixture.
Description: Romanian Journal of Ecology & Environmental Chemistry, vol. 3, no. 2, pp. 163-172, 2021,
https://doi.org/10.21698/rjeec.2021.2182021-12-01T00:00:00ZChemical characterization methods for biodegradable organic wastes with relevance for the composting process. Case studyCatrina, Gina AlinaKim, LidiaSerbanescu, AgnesCernica, GeorgianaBumbac, CostelSburlis, Mariushttp://hdl.handle.net/123456789/17842022-02-08T13:47:05Z2021-12-01T00:00:00ZTitle: Chemical characterization methods for biodegradable organic wastes with relevance for the composting process. Case study
Authors: Catrina, Gina Alina; Kim, Lidia; Serbanescu, Agnes; Cernica, Georgiana; Bumbac, Costel; Sburlis, Marius
Abstract: The study aimed to develop some methods for the compositional characterization of biodegradable waste with relevance to the composting process at the laboratory level. For testing, four waste fractions were selected, such as waste-based on dehydrated sludge, waste from parks (leaves, branches), market waste (mixture of vegetable and fruit), and cardboard waste. For metals and phosphorus, several microwave digestion methods were applied. The ammonium nitrogen content (NH4-N) was determined using a number of extraction procedures (water, CaCl2, and KCl). Three certified reference materials were used for testing the validity of the results. Recovery percentages higher than 90% were obtained. The developed and validated methods are suitable for biodegradable waste characterization used in composting processes.
Description: Romanian Journal of Ecology & Environmental Chemistry, vol. 3, no. 2, pp. 153-162, 2021,
https://doi.org/10.21698/rjeec.2021.2182021-12-01T00:00:00ZThe influence of toxic metals As, Cd, Ni and Pb on nutrients accumulation in Mentha piperitaDinu, CristinaVasile, GabrielaTenea, Anda GabrielaStoica, CatalinaGheorghe, StefaniaSerban, Ecaterina Ancahttp://hdl.handle.net/123456789/17832022-02-08T13:35:12Z2021-12-01T00:00:00ZTitle: The influence of toxic metals As, Cd, Ni and Pb on nutrients accumulation in Mentha piperita
Authors: Dinu, Cristina; Vasile, Gabriela; Tenea, Anda Gabriela; Stoica, Catalina; Gheorghe, Stefania; Serban, Ecaterina Anca
Abstract: Medicinal plants are, for a considerable part of the population, an important source of treatment for certain diseases. They contain essential nutrients for the human body such as magnesium, iron, and zinc. The present study shows the influence of the addition of As, Cd, Ni, Pb on mineral nutrients in different organs of Mentha piperita. The experiments were carried out in the laboratory for a period of three months (May-July). Mentha piperita plants were AsCd and AsCdNiPb exposed up to final concentrations corresponding to the soil intervention threshold according to Romanian Order no.756/1997 (25 mg/kg As, 5 mg/kg Cd, 150 mg/kg Ni and 100 mg/ kg Pb). Simultaneously with these experiments, a control experiment (M) was performed. To evaluate the effect of the addition of AsCd and AsCdNiPb on the accumulation and transfer of Ca, Cr, Cu, Mn, Mo, Fe, and Zn, the transfer coefficient (TC), the translocation factor (TF), and the enrichment factor (EF) were
calculated. A higher concentration of Ca, Cr, Cu, Fe, Mn, Mo, and Zn was observed especially in the mint root in the experiments in which AsCdNiPb was added compared to those in which only AsCd was added. The AsCdNiPb addition did not influence the translocation of micro and macronutrients from the root to the aerial (edible) parts of the plant. In the case of the AsCd, addition, the translocation of zinc from the root to the aerial parts (leaves and stem) of the plant was increased.
Description: Romanian Journal of Ecology & Environmental Chemistry, vol. 3, no. 2, pp. 141-152, 2021,
https://doi.org/10.21698/rjeec.2021.2172021-12-01T00:00:00ZShort investigation on occurrence and removal of semivolatiles during wastewater treatment processesPuiu, Dianahttp://hdl.handle.net/123456789/17822022-02-08T13:36:17Z2021-12-01T00:00:00ZTitle: Short investigation on occurrence and removal of semivolatiles during wastewater treatment processes
Authors: Puiu, Diana
Abstract: The food industry wastewater is known to present a high organic matter content, due to specific raw
materials and processing activities. Even if these compounds are not directly toxic to the environment, high concentrations in effluents could represent a source of pollution as discharges of high biological oxygen demand may impact receiving river's ecosystems. Identifying the main organic contaminants in wastewater samples represents the first step in establishing the optimum treatment method. The sample analysis for the non-target compounds through the GC-MS technique highlights, along with other analytical parameters, the efficiency of the main physical and biological treatment steps of the middle-size Wastewater Treatment Plant (WWTP). Long-chain fatty acids and their esters were the main abundant classes of non-target identified
compounds. The highest intensity detection signal was reached by n-hexadecanoic acid or palmitic
acid, a component of palm oil, after the physical treatment processes with dissolved air flotation, and
by 1-octadecanol after biological treatment.
Description: Romanian Journal of Ecology & Environmental Chemistry, vol. 3, no. 2, pp. 130-140, 2021, https://doi.org/10.21698/rjeec.2021.2162021-12-01T00:00:00Z