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Element remobilization, "internal P-loading," and sediment-P reactivity researched by DGT (diffusive gradients in thin films) technique.
Environ Sci Pollut Res Int. 2015 Oct; 22(20):16173-83.ES

Abstract

Labile P, Fe, and sulfide with the high spatial resolution in sediment porewater of five sites (A-E) of Dianchi Lake (China) were measured at same locations using AgI/Chelex-100, Chelex-100, and ferrihydrite DGT (diffusive gradients in thin films) probes. DGT derived P/Fe/S concentrations in sediment porewater on millimeter or sub-millimeter scale in order to reveal the element remobilization process and the mechanism of "internal P-loading" of sediments in Dianchi Lake. Decomposition of alga biomass in the uppermost sediment layer and the reductive dissolution of Fe-bound P in the anoxic sediment were the two main processes causing P release. A dynamic numerical model-DIFS (DGT-induced flux in sediments) was used to assess sediment-P reactivity (capacity of solid pool and rate of transfer) and P release risk by kinetic parameter-T C (1089∼20,450 s), distribution coefficient-K d (167.09∼502.0 cm(3) g(-1)), resupply parameter-R (from 0.242 to 0.518), and changes of dissolved/sorbed concentration, R and M at the microzone of DGT/porewater/sediment.

Authors+Show Affiliations

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. wzh7185@mail.bnu.edu.cn. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. wzh7185@mail.bnu.edu.cn. Dongtinghu Lake Ecological Observation and Research Station (DEORS), Yueyang, Hunan Province, 41400, People's Republic of China. wzh7185@mail.bnu.edu.cn.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. wangsr@craes.org.cn. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. wangsr@craes.org.cn. Dongtinghu Lake Ecological Observation and Research Station (DEORS), Yueyang, Hunan Province, 41400, People's Republic of China. wangsr@craes.org.cn.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. Dongtinghu Lake Ecological Observation and Research Station (DEORS), Yueyang, Hunan Province, 41400, People's Republic of China.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China. Dongtinghu Lake Ecological Observation and Research Station (DEORS), Yueyang, Hunan Province, 41400, People's Republic of China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26070735

Citation

Wu, Zhihao, et al. "Element Remobilization, "internal P-loading," and sediment-P Reactivity Researched By DGT (diffusive Gradients in Thin Films) Technique." Environmental Science and Pollution Research International, vol. 22, no. 20, 2015, pp. 16173-83.
Wu Z, Wang S, He M, et al. Element remobilization, "internal P-loading," and sediment-P reactivity researched by DGT (diffusive gradients in thin films) technique. Environ Sci Pollut Res Int. 2015;22(20):16173-83.
Wu, Z., Wang, S., He, M., Zhang, L., & Jiao, L. (2015). Element remobilization, "internal P-loading," and sediment-P reactivity researched by DGT (diffusive gradients in thin films) technique. Environmental Science and Pollution Research International, 22(20), 16173-83. https://doi.org/10.1007/s11356-015-4736-8
Wu Z, et al. Element Remobilization, "internal P-loading," and sediment-P Reactivity Researched By DGT (diffusive Gradients in Thin Films) Technique. Environ Sci Pollut Res Int. 2015;22(20):16173-83. PubMed PMID: 26070735.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Element remobilization, "internal P-loading," and sediment-P reactivity researched by DGT (diffusive gradients in thin films) technique. AU - Wu,Zhihao, AU - Wang,Shengrui, AU - He,Mengchang, AU - Zhang,Li, AU - Jiao,Lixin, Y1 - 2015/06/14/ PY - 2015/01/18/received PY - 2015/05/15/accepted PY - 2015/6/14/entrez PY - 2015/6/14/pubmed PY - 2016/6/14/medline KW - DGT (diffusive gradients in thin films) KW - DIFS (DGT-induced fluxes in sediments) KW - Sediment-P reactivity KW - “Internal P-loading” SP - 16173 EP - 83 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 22 IS - 20 N2 - Labile P, Fe, and sulfide with the high spatial resolution in sediment porewater of five sites (A-E) of Dianchi Lake (China) were measured at same locations using AgI/Chelex-100, Chelex-100, and ferrihydrite DGT (diffusive gradients in thin films) probes. DGT derived P/Fe/S concentrations in sediment porewater on millimeter or sub-millimeter scale in order to reveal the element remobilization process and the mechanism of "internal P-loading" of sediments in Dianchi Lake. Decomposition of alga biomass in the uppermost sediment layer and the reductive dissolution of Fe-bound P in the anoxic sediment were the two main processes causing P release. A dynamic numerical model-DIFS (DGT-induced flux in sediments) was used to assess sediment-P reactivity (capacity of solid pool and rate of transfer) and P release risk by kinetic parameter-T C (1089∼20,450 s), distribution coefficient-K d (167.09∼502.0 cm(3) g(-1)), resupply parameter-R (from 0.242 to 0.518), and changes of dissolved/sorbed concentration, R and M at the microzone of DGT/porewater/sediment. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/26070735/Element_remobilization_"internal_P_loading"_and_sediment_P_reactivity_researched_by_DGT__diffusive_gradients_in_thin_films__technique_ L2 - https://dx.doi.org/10.1007/s11356-015-4736-8 DB - PRIME DP - Unbound Medicine ER -