The Release Characteristics of Nutrients from Contaminated Sediment and Guiding for Dredging Depth

Mingming Wang, Mingming Wang, Jun Wei, Xiaowen Pan, Libing Wang, Pengxiao Zhao

2021

Abstract

Dredging is an efficient method for removing contaminated sediment, and the release characteristics of pollutants are important parameters for dredging engineering design. In this paper, the release characteristics of nutrients from contaminated sediment were examined. The dredging depth was determined by the adsorption-desorption equilibrium method. In the sedimentation experiment, the suspended sediment needed 72 h to stabilize, and the deeper sediments showed less effective sedimentation，the diaphanetity for 0~20 cm sediment is 16 cm. In the releasing test, the characteristics of NH4-N, shown as “L”, was different from P, which had an extreme concentration. The maximum releasing concentration for P is the layer of 20~40 cm sediment, and that for NH4-N is 0~20 cm. The corresponding equilibrium concentration is 0.1 and 0.16 mg/L for P in the static and dynamic station, respectively, and that for NH4-N is 2.0 and 3.2 mg/L. On the basis of the vertical release equilibrium profile and sedimentation test, the dredging depth in this study was recommended to be 80 ± 5 cm.

Paper Citation

in Harvard Style

Wang M., Wei J., Pan X., Wang L. and Zhao P. (2021). The Release Characteristics of Nutrients from Contaminated Sediment and Guiding for Dredging Depth. In Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE, ISBN 978-989-758-560-9, pages 164-170

in Bibtex Style

@conference{wre21,
author={Mingming Wang and Jun Wei and Xiaowen Pan and Libing Wang and Pengxiao Zhao},
title={The Release Characteristics of Nutrients from Contaminated Sediment and Guiding for Dredging Depth},
booktitle={Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,},
year={2021},
pages={164-170},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={978-989-758-560-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,
TI - The Release Characteristics of Nutrients from Contaminated Sediment and Guiding for Dredging Depth
SN - 978-989-758-560-9
AU - Wang M.
AU - Wei J.
AU - Pan X.
AU - Wang L.
AU - Zhao P.
PY - 2021
SP - 164
EP - 170
DO -