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161.
Radić Danka S. Pavlović Vera P. Lazović Milana M. Jovičić-Petrović Jelena P. Karličić Vera M. Lalević Blažo T. Raičević Vera B. 《Environmental science and pollution research international》2017,24(27):21885-21893
Environmental Science and Pollution Research - Modern, efficient, and cost-effective approach to remediation of heavy metal-contaminated soil is based on the application of microorganisms. In this... 相似文献
162.
Marek Majdan Monika Bujacka Eyup Sabah Agnieszka Gadysz-Paska Stanisaw Pikus Dariusz Sternik Zofia Komosa Aleksander Padewski 《Journal of environmental management》2009,91(1):195-205
The comparison of phenol sorption on phenyltrimethylammonium (PTMA)- and benzyltrimethylammonium (BTMA)-bentonite shows a clear difference as far as phenol sorption isotherms are concerned. For PTMA-bentonite the sorption isotherm is of a straight-line character which results from simple partitioning of phenol between the aqueous and organic phases sorbed on the bentonite surface. For BTMA-bentonite the isotherm has a convex shape, characteristic of physicochemical sorption.For the first time a three-parametric model, including the dissociation constant of phenol pKa, distribution constant of phenol Kdphen and phenolate anion Kdphen− between the aqueous phase and the bentonite phases is used for the evaluation of phenol sorption on organoclays with pH change. The model shows that the values of Kdphen are higher than those of Kdphen− for all investigated initial phenol concentrations.The inspection of the FTIR spectrum of BTMA-bentonite loaded with phenol in the regions 1300–1600 and 1620–1680 cm−1 shows the features of π–π electron interaction between the benzene rings of phenol and the BTMA cation together with the phenol–water hydrogen bond strengthened by this interaction. 相似文献
163.
The extent of pollution with organotin compounds and Cd, Pb, Ni, Cu, Zn, Cr, Mn, V, Co and Al was investigated in sediments
and mussels (Mytilus galloprovincialis) from the Slovenian costal area of the Northern Adriatic Sea. Sampling was performed in Marina Portorož, Dockyard Izola,
non exposed area of the Bay of Mesečev zaliv and in Mariculture Sečovlje. Mussels were taken in the summer and winter time,
while sediments were collected during the winter sampling. Organotin compounds were determined by gas chromatography—mass
spectrometry and metals by flame or electrothermal atomic absorption spectrometry. The accuracies of the analytical procedures
were checked by the analysis of standard reference materials CRM 477 mussel tissue and PACS 2 marine sediment (organotin compounds)
and SRM 2976 mussel tissue and CRM 320 river sediment (metals). Good agreements between certified and determined values were
obtained. Normalization procedure to Al was applied to estimate the anthropogenic inputs of metals in sediments. The analyses
of sediments demonstrated moderate pollution with organotin compounds in Marina Portorož and in Dockyard Izola. Concentrations
of tributyltin species were higher than those of dibutyltin and monobutyltin. In mussels substantial contamination with tributyltin
was observed in Marina Porotrož and Dockyard Izola. The extent of pollution was higher in the winter time. The analysis of
metals in sediments exhibited elevated concentrations in Marina Portorož and Dockyard Izola. Data from the normalization procedure
indicated the anthropogenic inputs of Cu, Zn and Cr in Marina Portorož and Mn in Bay of Mesečev zaliv and Dockyard Izola.
Mussels, as accumulators of pollutants, in general contained higher metal concentrations during winter time in Dockyard Izola. 相似文献
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165.
Irena Ciglenečki Srđan Pichler Esad Prohić Božena Ćosović 《Water, Air, & Soil Pollution: Focus》2006,6(5-6):537-545
Geochemical, mineralogical and sedimentological analyses were carried out to contrast two different sites (respectively characterized
by permanently oxic and anoxic conditions) in a small, meromictic, seawater lake. In fact, due to relatively high organic
matter content, and reduced water exchange, the Rogoznica Lake has almost permanent anoxic conditions below the depth of 12 m,
where sediment can be considered an anoxic–sulphidic sedimentary environment. Different water column and sediments redox conditions
affect the distribution and speciation of major redox-sensitive metals (Fe, Mn, Mo), reduced sulphur species (RSS) and dissolved
organic C (DOC). Trace metals, especially those that accumulate in anoxic–sulphidic environments (Fe, Mo) showed a marked
enrichment in the solid phase, whereas the low solubility of sulphides leads to low porewater concentrations. The relatively
high sedimentary enrichment of Mo (up to 81 mg/kg) also confirms highly anoxic conditions within the Rogoznica Lake sediments.
Results clearly show that chemical species within the sediments will tend towards equilibrium between porewater and solid
phase according the prevailing environment conditions such as redox, pH, salinity, DOC. 相似文献
166.
Jerzy S?owikowski Marek D?wiarek Maria Konarska 《International journal of occupational safety and ergonomics》2006,12(4):369-377
The study aimed at verifying a hypothesis that supporting a visual signal of regulation deviation with an auditory one could improve the quality of regulation; the operator would have better information on machine operation. A special simulator was applied to follow-up tracking with a manual lever which controlled vertical movements of a cursor on a monitor screen. Simultaneously with visual information on screen, the operator was provided with an auditory deviation signal of pre-determined characteristics. 33 young males underwent the test. It was found that supporting a visual signal with an auditory one resulted in an improvement in the regulation quality by 5-6%, which proved synergy between those signals. The results may be used in designing tele- and servo-mechanisms, especially for remote control machinery, e.g., inspection robots or micromanipulators controlled by operators in a follow-up system. 相似文献
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