نتایج جستجو برای: soil air

تعداد نتایج: 379641  

2015
Xiuying Zhang Dongmei Chen Taiyang Zhong Xiaomin Zhang Min Cheng Xinhui Li

2017
Marika Truu Ivika Ostonen Jens-Konrad Preem Krista Lõhmus Hiie Nõlvak Teele Ligi Katrin Rosenvald Kaarin Parts Priit Kupper Jaak Truu

Soil microbes play a fundamental role in forest ecosystems and respond rapidly to changes in the environment. Simultaneously with the temperature increase the climate change scenarios also predict an intensified hydrological cycle for the Baltic Sea runoff region. The aim of this study was to assess the effect of elevated air humidity on the top soil microbial community structure of a silver bi...

Journal: :international journal of environmental research 2014
m. ghadaksaz zadeh m.s. sekhavatjou a. hosseini alhashemi a. taghinia hejabi

mercury is a dangerous and an extremely toxic element, which can transfer to the food chain.presence of this element in the atmosphere particularly during the rainy seasons cause soil and environmental pollution, therefore this research will evaluate the transformation of mercury vapor from the atmosphere through precipitation into the soil. in the present study, mercury concentrations were det...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی 1391

the study of air infiltration into the buildings is important from several perspectives that may be noted to energy and design of hvac systems, indoor air quality and thermal comfort and design of smoke control systems. given the importance of this issue, an experimental and numerical study of air infiltration through conventional doors and windows has been explored in iran. to this end, at fir...

2012
Guo-Liang Xu Thomas M. Kuster Madeleine S. Günthardt-Goerg Matthias Dobbertin Mai-He Li

Global environmental changes affect not only the aboveground but also the belowground components of ecosystems. The effects of seasonal drought and air warming on the genus level richness of Collembola, and on the abundance and biomass of the community of Collembola and mites were studied in an acidic and a calcareous forest soil in a model oak-ecosystem experiment (the Querco experiment) at th...

2015
Shou-Qin Sun Hui-Ying Cai Scott X. Chang Jagtar S. Bhatti

Effects of sample storage methods on the quantity and quality of labile soil organic carbon are not fully understood even though their effects on basic soil properties have been extensively studied. We studied the effects of air-drying and frozen storage on cold and hot water soluble organic carbon (WSOC). Cold- and hot-WSOC in air-dried and frozen-stored soils were linearly correlated with tho...

Journal: :Journal of environmental radioactivity 2013
Runhild Gjelsvik Eiliv Steinnes

In order to follow the turnover of (137)Cs in natural soils and estimate future trends in exposure of livestock, samples of natural surface soils were collected at 0-3 cm depth at 464 sites in 1995 and 463 sites in 2005 covering the country. In both cases the geographical pattern observed was similar to the original distribution from 1986, but the decline of (137)Cs activity in the surface soil...

Journal: :international journal of environmental research 0
m. ghadaksaz zadeh department of environmental engineering, khouzestan science and research branch, islamic azad university, ahvaz, iran m.s. sekhavatjou department of environmental engineering, khouzestan science and research branch, islamic azad university, ahvaz, iran a. hosseini alhashemi department of environmental science, khouzestan science and research branch, islamic azad university, ahvaz, iran a. taghinia hejabi environmental consultant, ph.d in environmental geology, simpleks co., istanbul, turkey

mercury is a dangerous and an extremely toxic element, which can transfer to the food chain.presence of this element in the atmosphere particularly during the rainy seasons cause soil and environmental pollution, therefore this research will evaluate the transformation of mercury vapor from the atmosphere through precipitation into the soil. in the present study, mercury concentrations were det...

2014
Gunnar Jungqvist Stephen K. Oni Claudia Teutschbein Martyn N. Futter

Complex non-linear relationships exist between air and soil temperature responses to climate change. Despite its influence on hydrological and biogeochemical processes, soil temperature has received less attention in climate impact studies. Here we present and apply an empirical soil temperature model to four forest sites along a climatic gradient of Sweden. Future air and soil temperature were...

2014
Mohammad Mehdi Amin Mohammad Sadegh Hatamipour Fariborz Momenbeik Heshmatollah Nourmoradi Marzieh Farhadkhani Fazel Mohammadi-Moghadam

The integration of bioventing (BV) and soil vapor extraction (SVE) appears to be an effective combination method for soil decontamination. This paper serves two main purposes: it evaluates the effects of soil water content (SWC) and air flow rate on SVE and it investigates the transition regime between BV and SVE for toluene removal from sandy soils. 96 hours after air injection, more than 97% ...

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