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981.
Syam S. Andra Konstantinos C. Makris Shahida Quazi Dibyendu Sarkar Rupali Datta Stephan B. H. Bach 《Environmental science and pollution research international》2010,17(5):1167-1173
Background, aim, and scope
Organoarsenical-containing animal feeds that promote growth and resistance to parasites are mostly excreted unchanged, ending up in nearby wastewater storage lagoons. Earlier work documented the partial transformation of organoarsenicals, such as, 3-nitro-4-hydroxyphenylarsonic acid (roxarsone) to the more toxic inorganic arsenate [As(V)] and 3-amino-4-hydroxyphenylarsonic acid (3-AHPAA). Unidentified roxarsone metabolites using liquid chromatography coupled to inductively coupled plasma mass spectrometry (LC/ICP-MS) were also inferred from the corresponding As mass balance. Earlier batch experiments in our laboratory suggested the presence of organometallic (Cu) complexes during relevant roxarsone degradation experiments. We hypothesized that organocopper compounds were complexed to roxarsone, mediating its degradation in field-collected swine wastewater samples from storage lagoons. The objective of this study was to investigate the role of organometallic (Cu) complexes during roxarsone degradation under aerobic conditions in swine wastewater suspensions, using electrospray ionization mass spectrometry (ES-MS). 相似文献982.
Marc Gracia Nacima Meghelli Lluís Comas Javier Retana 《Regional Environmental Change》2011,11(2):349-358
The current state of Mediterranean mountain areas has been driven by two main factors: intense traditional human activity
and the dynamics of the ecosystem itself. In this study, we examine land-cover changes in a National Park in the Pyrenees
mountains (NE Iberian Peninsula), which was designated a protected area 55 years ago. First, we have analyzed spatio-temporal
changes in land-cover pattern and forest dynamics from 1957 to 2005. During this period, land-cover dynamics consisted of
two main processes: (i) expansion of the forest area and (ii) increasing cover of forests already present in 1957. To analyze
the role of the conservation level of the park, we have also compared the results obtained within the park with those of unprotected,
peripheral areas. In the two areas with different protection level, dense forests increased throughout the period because
of the reduction in forestry activities. The peripheral area showed a higher rate of forest-cover change from 1957 to 2005
compared to the National Park. This higher increase in forest cover in the peripheral area could be related to a higher proportion
in the National Park of screes and rocky areas and to the decline and transformation of forest activities in these peripheral,
lower elevation areas. 相似文献
983.
984.
985.
986.
Francesca R. Grati Denise Molina Gomes Devika Ganesamoorthy Livia Marcato Simona De Toffol Eleonore Blondeel Francesca Malvestiti Laurence Loeuillet Anna Maria Ruggeri Robert Wainer Federico Maggi Azzedine Aboura Celine Dupont Anne Claude Tabet Fabien Guimiot Howard R. Slater Giuseppe Simoni François Vialard 《黑龙江环境通报》2013,33(1):32-41
987.
988.
J. C. M. Pires A. L. Gonçalves F. G. Martins M. C. M. Alvim-Ferraz M. Simões 《Mitigation and Adaptation Strategies for Global Change》2014,19(7):1109-1117
Carbon dioxide (CO2) is one of the primary greenhouse gases that contribute to climate change. Consequently, emission reduction technologies will be needed to reduce CO2 atmospheric concentration. Microalgae may have an important role in this context. They are photosynthetic microorganisms that are able to fix atmospheric CO2 using solar energy with efficiency ten times higher than terrestrial plants. The objectives of this study were: (i) to analyse the effect of light supply on the growth of Chlorella vulgaris and Pseudokirchneriella subcapitata; (ii) to assess the atmospheric CO2 capture by these microalgae; and (iii) to determine the parameters of the Monod model that describe the influence of irradiance on the growth of the selected microalgae. Both microalgae presented higher growth rates with high irradiance values and discontinuous light supply. The continuous supply of light at the highest irradiance value was not beneficial for C. vulgaris due to photooxidation. Additionally, C. vulgaris achieved the highest CO2 fixation rate with the value of 0.305 g-CO2 L?1 d?1. The parameters of the Monod model demonstrated that C. vulgaris can achieve higher specific growth rates (and higher CO2 fixation rates) if cultivated under higher irradiances than the studied values. The presented results showed that microalgal culture is a promising strategy for CO2 capture from atmosphere. 相似文献
989.
990.
Helvi Heinonen-Tanski Mariëlle SNEL Christine van Wijk-Sijbesma Avizit Reaz Quazi Kochurani Mathew Induka Werellagama Mujibur Rahman S.M.A. Rashid Palitha Jayaweera Helen Judith 《Environment, Development and Sustainability》2007,9(4):355-368
Environmental quality for environmental health has been examined visually by describing general conditions and drinking water
supply, sanitation and solid waste treatment conditions and practices in six South-East Asian villages with a dense population.
The environmental review was supplemented by discussions with local people and political and administrative decision makers.
Some drinking water analyses were done in order to show the water quality to the local people. The quality of the general
conditions and the conditions and practices of drinking water supply, excreta disposal and solid waste treatment practices
have been graded with the grading system presented below. The grading could be done in 1 or 2 days in each area by two persons,
of which one was an environmental scientist and the other a social scientist, who also knew the local culture and worked as
a translator. 相似文献