Publications by authors named "Dongde Ruan"

CO monitoring is important for carbon emission evaluation. Low-cost and medium-precision sensors (LCSs) have become an exploratory direction for CO observation under complex emission conditions in cities. Here, we used a calibration method that improved the accuracy of SenseAir K30 CO sensors from ±30 ppm to 0.

View Article and Find Full Text PDF

For surface water samples collected from the Hangzhou section of Qiantang River (before, during, or after the occurrence of a water odor pollution event), 125 kinds of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs)were quantitatively determined via purge&trap-gas chromatography-mass spectrometry and liquid-liquid extraction-gas chromatography-triple quadrupole mass spectrometry. Then, the pollution characteristics of the VOCs and SVOCs were analyzed, and the health risk of these compounds was assessed. The results showed that 17 VOCs and SVOCs in the surface water samples of 4 monitoring sections were detected, in a concentration range of 0.

View Article and Find Full Text PDF

Organochlorine pesticides (OCPs) were quantitatively determined by GC in several surface water samples collected in July 2011 and November 2011 from Lake Qiandao (Xin'an River Reservoir) and its major input rivers. Then the component characteristics and source apportionment of HCHs and DDTs were confirmed, and the health risk assessment was evaluated. The results showed that 8 OCPs were found to be in trace amount, and p,p'-DDT, a-HCH and p,p'-DDE were the highest frequently detected OCPs.

View Article and Find Full Text PDF

Totally 77 kinds of volatile organic compounds (VOCs) in inlet/outlet wastewater of 10 typical enterprises in Hangzhou City were determined by headspace-gas chromatography-mass spectrometry, then the discharge characteristics of VOCs were analyzed, and the monitoring results were evaluated. The results indicated that 22 kinds of VOCs were detected in inlet wastewater, the range of VOCs concentrations was 7-3.39 x 10(6) microg x L(-1), while 14 kinds of VOCs were detected in outlet wastewater, the range of VOCs concentrations was 16- 6.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: