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A small subsurface ion mobility spectrometer (SS-IMS) was constructed and tested with several environmental contaminants to determine its potential for monitoring gaseous volatile organic compounds in the vadose zone. Trichloroethylene (TCE) and tetrachloroethylene (PCE) were detected and separated in IMS for the first time. Detection limits as low as 1 part per billion volume-to-volume (ppb(v)) were observed. Reduced mobility (K(0)) values were reported for 11 environmental contaminants. These data demonstrated the potential of ion mobility spectrometry as a viable technology for detecting and separating environmental soil-gas contaminants in the field, which may lead to a practical and simple approach for long-term monitoring of contaminated soils. 相似文献
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The transport of nutrients and soil sediments in runoff has been recognized as a noteworthy environmental issue. Vegetative Filter Strips (VFS) have been used as one of the best management practices (BMPs) for retaining nutrients and sediments from surface runoff, thus preventing the pollutants from reaching receiving waters. However, the effectiveness of a VFS when combined with a subsurface drainage system has not been investigated previously. This study was undertaken to monitor the retention and transport of nutrients within a VFS that had a subsurface drainage system installed at a depth of 1.2 m below the soil surface. Nutrient concentrations of NO3-N (Nitrate Nitrogen), PO4− (Orthophosphorus), and TP (Total Phosphorus) were measured in surface water samples (entering and leaving the VFS), and subsurface outflow. Soil samples were collected and analyzed for plant available Phosphorus (Bray P1) and NO3-N concentrations. Results showed that PO4−, NO3-N, and TP concentrations decreased in surface flow through the VFS. Many surface outflow water samples from the VFS showed concentration reductions of as much as 75% for PO4− and 70% for TP. For subsurface outflow water samples through the drainage system, concentrations of PO4− and TP decreased but NO3-N concentrations increased in comparison to concentrations in surface inflow samples. Soil samples that were collected from various depths in the VFS showed a minimal buildup of nutrients in the top soil profile but indicated a gradual buildup of nutrients at the depth of the subsurface drain. Results demonstrate that although a VFS can be very effective in reducing runoff and nutrients from surface flow, the presence of a subsurface drain underneath the VFS may not be environmentally beneficial. Such a combination may increase NO3-N transport from the VFS, thus invalidating the purpose of the BMP. 相似文献
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Calcium amendment improved the performance of fragrant rice and reduced metal uptake under cadmium toxicity 总被引:2,自引:0,他引:2
Kanu Adam Sheka Ashraf Umair Mo Zhaowen Sabir Sabeeh-ur-Rasool Baggie Idris Charley Christen Shaka Tang Xiangru 《Environmental science and pollution research international》2019,26(24):24748-24757
Environmental Science and Pollution Research - Cadmium (Cd) toxicity has detrimental effects on plant metabolism and yield formation. This study examined the effects of Cd stress in rice and the... 相似文献
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The use of Rooibos shoots, a natural adsorbent, for cadmium removal from wastewater is proposed. The effects of initial pH, adsorbent dosage, contact time, and initial concentration were investigated in the batch adsorption mode. The optimum pH was found to be 5.5. Isotherm and kinetic data were modeled; the data fitted best to the Freundlich model, and, kinetically, the adsorption was of pseudo-second order as shown by the high R2 value of 0.9928 along with close agreement between the experimental qe (13.9 mg g?1) and calculated qe (14.24 mg g?1) values. The studied biomass material was found to be effectively used for removal of cadmium from contaminated mine wastewater. 相似文献
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Verma Neha Pandit Soumya Gupta Piyush Kumar Kumar Sanjay Kumar Anil Giri Shiv Kumar Yadav Gulab Priya Kanu 《Environmental science and pollution research international》2022,29(21):30954-30966
Environmental Science and Pollution Research - Long-term exposure to organic solvents is known to affect human health posing serious occupational hazards. Organic solvents are genotoxic, and they... 相似文献
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