PRELIMINARY DATA REGARDING BIOREMEDIATION OF SOILS POLLUTED WITH PETROLEUM HYDROCARBONS BY USING CYCLODEXTRINS

The main characteristics of the pollution caused by refineries and petrochemical plants is that the source of pollution is active, most of the time, for a short period of time, but has an important intensity, the pollutiong agent being usualy made up of limited pretoleum fractions. Also, in most of tha cases of accidental spills of petroleum products, the affected soil surface is much smaller than the contaminated surface of the first aquifer encountered by the pollution front. The crude oil resulting from the extraction, having a complex composition, acts on the soil depending on the amount, composition and properties of the organic and inorganic components contained. β-Cyclodextrin is a chemical substance with the molecular formula C42H70O35. Cyclodextrins were the first compounds studied in terms of complexation behaviour and catalytic properties, the objective being to mimic enzymes. The paper presents data concerning the soil physical, chemical and biological characteristics and chemical characteristics of crude oil that will be used in the Greenhouse experiment. Also, in the paper is achieved the state of the art for β-cyclodextrins used in bioremediation of soils polluted with petroleum hydrocarbons

A STUDY REGARDING CORRELATION BETWEEN CONTENTS IN SOIL AND CONTENTS IN PARSLEY ROOTS OF CADMIUM, LEAD, ZINC AND COPPER IN SAMPLES COLLECTED FROM PRIVATE GARDENS IN COPSA MICA

Food security is a high-priority issue for sustainable global development both quantitatively and qualitatively. The increasing contamination of heavy metals in vegetables is attributed to multiple pathways, such as industrial emissions, sewage sludge discharge, agrochemicals and fertilizers abuse, and it has become a serious issue worldwide, especially in developing countries. CopşaMicăhad the reputation of being the most polluted city in Europe until the Chernobyl nuclear accident. This was due to emissions from two factories Carbosin, which produced carbon black and Sometra, the other source of pollution, less visible, but much more serious from the point of view of the impact on the human health.For this study, were collected soil and parsley (Petroselinum crispum) samples from 36 households located in CopşaMică area. The obtained data were used to estimate the accumulation of cadmium, lead, zinc and copper in parsley roots. by correlation factor between contents in soil and contents in parsley roots. For cadmium and lead, the value of linear correlation coefficient is r = 0.571 for cadmium and r = 0.381 for lead and it is indicating a good correlation between the cadmium and lead content in parsley roots and the cadmium and lead content in soil. For zinc and copper, the value of the linear correlation coefficient is r = 0.139 for zinc and r = 0.035 for copper is not significantly different from zero, indicating that the estimation of zinc and copper accumulation in parsley roots cannot be described by simple power-type regressions

Accumulation of some heavy metals in carrot roots sampled from households in Copsa Mica

Heavy metals can affect the vegetables and can accumulate in vegetables and thereby indirectly can affect human health. Due to various factors including the disposal of municipal and industrial wastes, application of fertilizers, atmospheric deposition and discharge of wastewater on land, has resulted in increase in the concentration of heavy metals in the soil. Soil normally contains a low concentration of heavy metals such as copper (Cu) and zinc (Zn), which are the essential micronutrients for the optimum growth of the plants. Heavy metals like cadmium (Cd) and lead (Pb) are usually not found in agricultural soil and are toxic to plants. The paper presents a case study achieved in Copsa Mica. As a result of a historical pollution (over 60 years) and a present pollution, the Copsa Mica area is an affected area by atmospheric pollution, characterized by inadequate ambient air quality, surface water pollution, soil pollution, qualitative degradation of vegetable products and possible risk to the health of animals and people in the area. There were sampled carrots roots from 51 households. Obtained data were used to estimate the bioaccumulation of some heavy metals (Cd, Cu, Pb and Zn) in carrot roots. The highest correlations between soil and plant total metal content were obtained for cadmium and lead. It is noted the increased tendency of accumulation of cadmium (r=0.761) in carrot roots compared to lead (r=0.660). In the case of copper and zinc, the correlation established between the two variables is not very strong, thus for zinc r=0.439, while for copper the value was obtained r=0.151