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Metal/metalloid and phosphorus characteristics in porewater associated with manganese geochemistry: A case study in the Jiulong River Estuary, China.
Environ Pollut. 2019 Dec; 255(Pt 1):113134.EP

Abstract

Sediment porewater can be an important source of contaminants in the overlying water, but the mechanisms of metal(loid) and phosphorus (P) remobilization remain to be investigated. In this study, high-resolution dialysis (HR-Peeper) and diffusive gradients in thin films (DGT) samplers were used to determine the porewater dissolved iron (Fe), manganese (Mn), cobalt (Co), chromium (Cr), vanadium (V), selenium (Se), arsenic (As), P and DGT-Labile S in coastal sediments in the Jiulong River Estuary (JRE), China. The results showed that high concentrations of dissolved Mn, Se and P were present in the overlying water, indicating potential water pollution with excessive amounts of Mn, Se and P. The dissolved Mn concentrations in the porewater were higher than the dissolved Fe concentrations, especially at submerged sites, demonstrating that Mn(III/IV) reduction is the dominant diagenetic pathway for organic carbon (OC) degradation, which directly affects Fe cycling by the competitive inhibition of Fe(III) reduction and Fe(II) reoxidation. Dissolved Co, Cr, V, Se, As and P show significant positive correlations with Mn but nearly no correlations with Fe, suggesting that the mobility of these metal(loid)s and P is associated with Mn but not Fe cycling in this region. In addition, the coelevated concentrations of the metal(loid)s, P and Mn at the submerged sites are attributed to the strengthened Mn reduction coupled with OC degradation fueled by hypoxia. The higher positive diffusion fluxes of Mn, Se and P were consistent with the excess Mn, Se and P concentrations in the overlying water, together with the approximately positive fluxes of the other metal(loid)s, indicating that sediment Mn(III/IV) reduction and concomitant metal(loid) and P remobilization might be vital pathways for metal(loid) and P migration to the overlying water.

Authors+Show Affiliations

College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China.College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China. Electronic address: lht@xmu.edu.cn.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China.College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, PR China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31520910

Citation

Pan, Feng, et al. "Metal/metalloid and Phosphorus Characteristics in Porewater Associated With Manganese Geochemistry: a Case Study in the Jiulong River Estuary, China." Environmental Pollution (Barking, Essex : 1987), vol. 255, no. Pt 1, 2019, p. 113134.
Pan F, Liu H, Guo Z, et al. Metal/metalloid and phosphorus characteristics in porewater associated with manganese geochemistry: A case study in the Jiulong River Estuary, China. Environ Pollut. 2019;255(Pt 1):113134.
Pan, F., Liu, H., Guo, Z., Cai, Y., Fu, Y., Wu, J., Wang, B., & Gao, A. (2019). Metal/metalloid and phosphorus characteristics in porewater associated with manganese geochemistry: A case study in the Jiulong River Estuary, China. Environmental Pollution (Barking, Essex : 1987), 255(Pt 1), 113134. https://doi.org/10.1016/j.envpol.2019.113134
Pan F, et al. Metal/metalloid and Phosphorus Characteristics in Porewater Associated With Manganese Geochemistry: a Case Study in the Jiulong River Estuary, China. Environ Pollut. 2019;255(Pt 1):113134. PubMed PMID: 31520910.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Metal/metalloid and phosphorus characteristics in porewater associated with manganese geochemistry: A case study in the Jiulong River Estuary, China. AU - Pan,Feng, AU - Liu,Huatai, AU - Guo,Zhanrong, AU - Cai,Yu, AU - Fu,Yuyao, AU - Wu,Jinye, AU - Wang,Bo, AU - Gao,Aiguo, Y1 - 2019/08/31/ PY - 2019/05/05/received PY - 2019/08/17/revised PY - 2019/08/28/accepted PY - 2019/9/15/pubmed PY - 2020/1/22/medline PY - 2019/9/15/entrez KW - Exchange flux KW - Heavy metal KW - Metalloids KW - Mn cycling KW - Peeper KW - Phosphorus SP - 113134 EP - 113134 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 255 IS - Pt 1 N2 - Sediment porewater can be an important source of contaminants in the overlying water, but the mechanisms of metal(loid) and phosphorus (P) remobilization remain to be investigated. In this study, high-resolution dialysis (HR-Peeper) and diffusive gradients in thin films (DGT) samplers were used to determine the porewater dissolved iron (Fe), manganese (Mn), cobalt (Co), chromium (Cr), vanadium (V), selenium (Se), arsenic (As), P and DGT-Labile S in coastal sediments in the Jiulong River Estuary (JRE), China. The results showed that high concentrations of dissolved Mn, Se and P were present in the overlying water, indicating potential water pollution with excessive amounts of Mn, Se and P. The dissolved Mn concentrations in the porewater were higher than the dissolved Fe concentrations, especially at submerged sites, demonstrating that Mn(III/IV) reduction is the dominant diagenetic pathway for organic carbon (OC) degradation, which directly affects Fe cycling by the competitive inhibition of Fe(III) reduction and Fe(II) reoxidation. Dissolved Co, Cr, V, Se, As and P show significant positive correlations with Mn but nearly no correlations with Fe, suggesting that the mobility of these metal(loid)s and P is associated with Mn but not Fe cycling in this region. In addition, the coelevated concentrations of the metal(loid)s, P and Mn at the submerged sites are attributed to the strengthened Mn reduction coupled with OC degradation fueled by hypoxia. The higher positive diffusion fluxes of Mn, Se and P were consistent with the excess Mn, Se and P concentrations in the overlying water, together with the approximately positive fluxes of the other metal(loid)s, indicating that sediment Mn(III/IV) reduction and concomitant metal(loid) and P remobilization might be vital pathways for metal(loid) and P migration to the overlying water. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/31520910/Metal/metalloid_and_phosphorus_characteristics_in_porewater_associated_with_manganese_geochemistry:_A_case_study_in_the_Jiulong_River_Estuary_China_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(19)32358-9 DB - PRIME DP - Unbound Medicine ER -