Publications by authors named "Feng-Yu Zan"
In this study, we present a nanofiltration (NF90, NF270) pretreatment to increase the precision of dissolved organic nitrogen (DON) measurements in water samples. The variations of DON measurements with and without NF pretreatment were investigated. And the effects on the removal of dissolved inorganic nitrogen (DIN) by NF90 and NF270 were compared.
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- - The study analyzed organic phosphorus fractions in sediments from seven different lakes, focusing on how soil and pollution differences affected these fractions and their relationships with bioavailable phosphorus.
- - There was a strong correlation between organic matter and organic phosphorus, particularly in most lakes, highlighting that different lakes have varying sources and cycles of phosphorus.
- - Moderately labile and nonlabile organic phosphorus were the largest contributors to total organic phosphorus, while labile organic phosphorus made up a small proportion, indicating that some phosphorus fractions can potentially become bioavailable despite being initially resistant.
[Rapid determination of chemical components in interstitial water of lake sediments using near-infrared spectroscopy].
Guang Pu Xue Yu Guang Pu Fen Xi
January 2011
The near infrared reflectance spectra (NIRS) of interstitial water samples of lake sediments in Chaohu lake were determined by near-infrared reflectance spectrometry. The respective near NIRS calibration models for predicting total nitrogen (TN), total organic carbon (TOC), phosphorus ( PO3(3-)), ammonia nitrogen(NH3-N) and silicate (SiO3-) were built using partial least squares (PLS) algorithm with two spectral pretreatment tools including, wavelet compression combining orthogonal signal correction (OSC) and orthogonal signal correction (OSC) combining wavelet compression. The correlation coefficients between measured values and predicted values in calibration set for TN, NH3-N, PO3(3-), TOC and SiO3(3-) were 0.
View Article and Find Full Text PDF[Rapid determination of nutrient components in lake sediments using near infrared spectroscopy].
Guang Pu Xue Yu Guang Pu Fen Xi
October 2010
The lake sediments record important environmental evolution information of lake in recent 100 years. However, a rapid and precise combination analytical method measuring nutrient components in lake sediments can not be established. The near infrared reflectance spectra (NIRS) of sediment coring samples were determined by near-infrared reflectance spectrometry.
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