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[Effects of black spots of dead-cyanobacterial mats on Fe-S-P cycling in sediments of Zhushan Bay, Lake Taihu].
Huan Jing Ke Xue. 2009 Sep 15; 30(9):2520-6.HJ

Abstract

The purpose of the paper was to study the biogeochemical response of Fe-S-P in sediments in an extremely conditions (DO = 0.14 mg x L(-1), Eh = -89.3 mV), which was caused by the dead-cyanobacterial mats. The results showed that organic matter concentration in surficial sediment was higher, and also the Org-P concentration in surface sediments increased 72 mg x kg(-1) than those of natural sediments for the dead-cyanobacterial cells sedimentation on the sediment. The phosphorus bound Fe was dissolved in lower Eh and anoxia in water and it increased the content of activated Fe and PO4(3-) -P in sediments, also the concentration of Fe-P in sediment was lower than that of natural sediments. The concentration of PO4(3-) -P in interstitial water in sediments was higher than that of natural sediments, it would release to the overlying water and could be helpful to the next algae blooms outbreak. Also the activated Fe2+ concentration increased in the sediment in reducing environment (the Dithio-Fe increased 30 micromol than that the natural sediments); moreover, the increased Fe2+ caused the crystalline iron oxides to transform to the amorphous iron oxides. The anaerobic conditions of the water caused the AVS concentration increased and formed massive sulfides, including the production of H2S, which would escape to the atmosphere, but it would be harmful to water column ecological health; the sulfides also increased in surficial sediment for the more production of AVS (the sulfides in dead-cyanobacterial mats district was 50 micromol x g(-1) higher than natural water column).

Authors+Show Affiliations

State Key Laboratory of Lake & Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China. gfliu@niglas.ac.cnNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

chi

PubMed ID

19927797

Citation

Liu, Guo-Feng, et al. "[Effects of Black Spots of Dead-cyanobacterial Mats On Fe-S-P Cycling in Sediments of Zhushan Bay, Lake Taihu]." Huan Jing Ke Xue= Huanjing Kexue, vol. 30, no. 9, 2009, pp. 2520-6.
Liu GF, Zhong JC, He J, et al. [Effects of black spots of dead-cyanobacterial mats on Fe-S-P cycling in sediments of Zhushan Bay, Lake Taihu]. Huan Jing Ke Xue. 2009;30(9):2520-6.
Liu, G. F., Zhong, J. C., He, J., Zhang, L., & Fan, C. X. (2009). [Effects of black spots of dead-cyanobacterial mats on Fe-S-P cycling in sediments of Zhushan Bay, Lake Taihu]. Huan Jing Ke Xue= Huanjing Kexue, 30(9), 2520-6.
Liu GF, et al. [Effects of Black Spots of Dead-cyanobacterial Mats On Fe-S-P Cycling in Sediments of Zhushan Bay, Lake Taihu]. Huan Jing Ke Xue. 2009 Sep 15;30(9):2520-6. PubMed PMID: 19927797.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Effects of black spots of dead-cyanobacterial mats on Fe-S-P cycling in sediments of Zhushan Bay, Lake Taihu]. AU - Liu,Guo-Feng, AU - Zhong,Ji-Cheng, AU - He,Jun, AU - Zhang,Lei, AU - Fan,Cheng-Xin, PY - 2009/11/26/entrez PY - 2009/11/26/pubmed PY - 2010/10/27/medline SP - 2520 EP - 6 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 30 IS - 9 N2 - The purpose of the paper was to study the biogeochemical response of Fe-S-P in sediments in an extremely conditions (DO = 0.14 mg x L(-1), Eh = -89.3 mV), which was caused by the dead-cyanobacterial mats. The results showed that organic matter concentration in surficial sediment was higher, and also the Org-P concentration in surface sediments increased 72 mg x kg(-1) than those of natural sediments for the dead-cyanobacterial cells sedimentation on the sediment. The phosphorus bound Fe was dissolved in lower Eh and anoxia in water and it increased the content of activated Fe and PO4(3-) -P in sediments, also the concentration of Fe-P in sediment was lower than that of natural sediments. The concentration of PO4(3-) -P in interstitial water in sediments was higher than that of natural sediments, it would release to the overlying water and could be helpful to the next algae blooms outbreak. Also the activated Fe2+ concentration increased in the sediment in reducing environment (the Dithio-Fe increased 30 micromol than that the natural sediments); moreover, the increased Fe2+ caused the crystalline iron oxides to transform to the amorphous iron oxides. The anaerobic conditions of the water caused the AVS concentration increased and formed massive sulfides, including the production of H2S, which would escape to the atmosphere, but it would be harmful to water column ecological health; the sulfides also increased in surficial sediment for the more production of AVS (the sulfides in dead-cyanobacterial mats district was 50 micromol x g(-1) higher than natural water column). SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/19927797/[Effects_of_black_spots_of_dead_cyanobacterial_mats_on_Fe_S_P_cycling_in_sediments_of_Zhushan_Bay_Lake_Taihu]_ DB - PRIME DP - Unbound Medicine ER -