Algal activity of dissolved organic nitrogen (DON) in the sediments of Lake Taihu, Eastern China

Zhai, Tianen; Zhang, Jingtian; Huo, Shouliang; Xi, Beidou; Su, Mingzhou; Ma, Chunzi; He, Zhuoshi; Su, Jing

doi:10.1007/s12665-016-6286-x

Cited by 9 publications

(6 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sediment NO 3 − -N content ranged from 9.87 mg/kg to 25.70 mg/kg, and accounted for the lowest percentage fraction of sediment TDN compared with other nitrogen species. It is likely that this result is because the sediment is an anaerobic environment, which is unfavorable to the formation of NO 3− -N sediment NO 3− -N. The KS-DON content ranged from 39.23 mg/kg to 76.63 mg/kg, contributed to 68.0–82.5% of sediment TDN, consistent with previous studies [14].…”

Section: Resultssupporting

confidence: 89%

“…CH was the second main component of KS-DON, contributing 33.78 ± 1.32%, followed by SH and WH (14.29 ± 0.69% and 8.10 ± 1.51%, respectively). Previous study also indicated that approximately 62.74% of the KS-DON was hydrophilic fraction in Taihu Lake [14].…”

Section: Resultsmentioning

confidence: 88%

“…While fluorescence components of KS-DON from Y6 mainly comprised fluvic acid-like substances (Region III) and humic acid-like substances (Region V), which was different with other water source KS-DON. Previous studies reported that main fluorescence peak of hydrophilic fraction in Taihu Lake surface sediment extracts were located at Region II and III, whereas hydrophilic fraction has another obvious fluorescence peak in Region IV [14]. Besides, there was a obvious fluorescence peak on Region IV of LMW fractions, whereas a humic-like substance peak was obvious in the Region V of HMW fractions [12].…”

Section: Resultsmentioning

confidence: 99%

“…From the above, we concluded that KS-DON in Taihu Lake source sediments is mainly composed of hydrophilic and small molecular components, while the fluorescence spectrum of KS-DON shows high protein fluorescence. Based on the analysis of Zhai et al [12,14,52,55], it is concluded that the sediment KS-DON in Taihu Lake source area has higher bioavailability and higher risk of endogenous release. In addition, higher NH 4 + -N loads also exist in sediments, which should be paid attention to.…”

Section: Resultsmentioning

confidence: 99%

“…Many studies have confirmed the bioavailability of DON in sediments [12,13,14], indicating that higher content and fluorescence characteristics of hydrophilic fraction of dissolved organic matter (HIM) had a higher bioavailability and might remarkably impact the nitrogen cycle in water [15], and benthic macroalgae can also use low molecular weight DON compounds in sediments for growth. Besides, sediment DON can easily be released into overlying water in high temperature (>25 °C) and absorbed by algae quickly.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Characteristics of Dissolved Organic Nitrogen in the Sediments of Six Water Sources in Taihu Lake, China

Yang

Wei

et al. 2019

IJERPH

View full text Add to dashboard Cite

KCl-extractable sediment dissolved organic nitrogen (KS-DON) extracted from sediments near drinking water intakes of six drinking water sources in Taihu Lake in China was partitioned into hydrophobic and hydrophilic fractions and high/low molecular weight fractions. The results showed that the total dissolved nitrogen (TDN) contents of the extracts ranged from 67.78 to 128.27 mg/kg. KS-DON was the main TDN species, accounting for more than 50%, with NH4+-N and NO3−-N averaging 30% and 20%, respectively. The molecular weight fractions of <1 kDa accounted for almost half of KS-DON. Hydrophilic compounds accounted for more than 75% of KS-DON. Three fluorescence peaks were identified: soluble microbial byproducts (A); protein-like substances (B); and humic acid-like substances (C). It is concluded that the KS-DON in Taihu Lake sources has higher bioavailability and higher risk of endogenous release. Ecological dredging and establishment of constructed wetlands are possible measures to reduce the release of endogenous nitrogen.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characteristics of Dissolved Organic Nitrogen in the Sediments of Six Water Sources in Taihu Lake, China

Yang

Wei

et al. 2019

IJERPH

View full text Add to dashboard Cite

show abstract

Quantitative study on the structure-bioavailability relationship of dissolved organic nitrogen in wastewater treatment plant effluent

Yan

Wei

Liu

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

This study systematically investigated the relationship between the structure properties and biological characteristics of DON in the e uents from municipal wastewater treatment plants. Ultra ltration, FTIR spectroscopy, UV spectroscopy and EEM uorescence spectroscopy were used to characterize the structure of organic matters in the e uent samples, and the bioavailability of DON was determined by algal/bacterial based bioassay. The quantitatively analysis of EEM spectra conducted by uorescence regional integration method showed that the organic portion of all samples were mainly consistent with fulvic acid and protein. Combined with the bioassay results, a positive correlation between the DON bioavailability and the protein content (sum of region I and region II) (r=0.80, P 0.02) and soluble microbial byproduct-like materials (region IV) (r=0.76, P 0.03) were observed. Nevertheless, the humic substances content represented by the region III and V would negatively affect the DON bioavailability.High humi cation degree (high HIX value) (r=-0.77, P 0.03) was related to low bioavailability. Furthermore, according to UV spectroscopy results, strong aromaticity (high UV 254 values) (r=-0.78, P 0.03) suggested low DON bioavailability. The ultra ltration experiment showed that the low molecular weight DON ( 3kDa) accounted for 30-73% of the total DON, and no notable relationship was observed for DON molecular weight and its bioavailability.

show abstract

Removal of disinfection byproduct precursors and reduction in additive toxicity of chlorinated and chloraminated waters by ozonation and up-flow biological activated carbon process

et al. 2019

View full text Add to dashboard Cite

Algal activity of dissolved organic nitrogen (DON) in the sediments of Lake Taihu, Eastern China

Cited by 9 publications

References 61 publications

Characteristics of Dissolved Organic Nitrogen in the Sediments of Six Water Sources in Taihu Lake, China

Characteristics of Dissolved Organic Nitrogen in the Sediments of Six Water Sources in Taihu Lake, China

Quantitative study on the structure-bioavailability relationship of dissolved organic nitrogen in wastewater treatment plant effluent

Removal of disinfection byproduct precursors and reduction in additive toxicity of chlorinated and chloraminated waters by ozonation and up-flow biological activated carbon process

Contact Info

Product

Resources

About