【摘 要】
:
To study the impact of an artificial waterfall using reclaimed water on volatile organic compounds(VOCs) in air, air samples around the waterfall sight and over
【机 构】
:
Dept. of Construction Management,Environmental Science Research Center of PLA
【基金项目】
:
The Military Scientific Research Project
论文部分内容阅读
To study the impact of an artificial waterfall using reclaimed water on volatile organic compounds(VOCs) in air, air samples around the waterfall sight and over the CASS pond of a wastewater treatment plant were collected and VOCs were analyzed by MC-MS with USEPA Method TO-14. The total volatile organic com-pounds (TOVCs) concentration of a background sample is 2112μg/m3, and the sample over the CASS pond has a TVOC concentration of 1858μg/m3. The TVOC concentrations of air samples within 10 m of the artificial waterfall are between 3216μg/m3 and 6362μg/m3, which are 1.52-3.0 times that of the background sample. The VOCs in air sample impacted by reclaimed water or waste water exhibit a relatively high proportion of toluene but low proportion of benzene. B/T/E/X (Benzene/Toluene/Ethylbenzene/Xylene) ratio of the air sample around the artificial water fall is(0.36/11.78/1/1.10). Health risk assessment (HRA) was done with the USEPA four-step approach. The result indicates that the artificial waterfall using reclaimed water indeed leads to the increase of human risk value. The total risk value of the sample around the waterfall is 2.8-1.6times that of the background sample. However, the total risk value of the air sample around the waterfall (2.8×10-6) for common people is still lower, compared to the acceptable public risk level( 10-5). For occupation-al workers of the wastewater treatment plant, the sum of lifetime non-carcinogenic and carcinogenic risk values(1.26×10-5) is higher than that of the acceptable public risk level.
其他文献
The objective of this work is to investigate the fermentation capacity and metabolic characteristics of a novel strain of bacteria B49 isolated from anaerobic a
为揭示紫胶林-农田复合生态系统地表甲虫多样性,于2006-2007年在云南省绿春县牛孔乡采用陷阱法调查了天然紫胶林、人工紫胶林和旱地的地表甲虫群落。共采集标本1678头,分别隶
Gap statistic is a well-known index of clustering validity, but its realization is difficult to be comprehended and accurately determined. A direct method is pr
Energy, which has a bearing on both economic and national security, is of importance and a major constraining factor to the economic and social development of C
Current oil saturation in the Moxizhuang (莫西庄) Oil Field in central Janggar (准噶尔) basin was evaluated by logging interpretation and measured on core sampl
Abstract For estimation of the deposition fractions of radon progeny in different regions of the respiratory tract, a new sampler consisting of three different
To evaluate the long-term environmental effect of the nitrobenzene precipitated into Songhua River caused by the explosion accident of CNPC Jilin Petrochemical
The cavitation around a hydrofoil is studied experimentally tO shed light on the multiphase fluid dynamies.Different cavitation regimes are studied by using hig
采用常规解剖和组织学切片的方法,对长江上游宜宾江段长鳍吻的卵巢发育、卵子发生以及成熟系数的周年变化进行了研究.研究结果表明,长鳍吻(鱼句)卵巢发育分为Ⅵ期,卵母细胞发
Effects of cadmium (Cd) on microbial biomass, activity and community diversity were assessed in a representative variable charge soil (Typic Aquult) using an in