Seasonal and spatial distribution of matrix-bound phosphine and its relationship with the environment in the Changjiang River Estuary, China
Seasonal and spatial distribution of matrix-bound phosphine and its relationship with the environment in the Changjiang River Estuary, China
复制标题
长江口基质结合磷的季节和空间分布及其与环境的关系
DOI：
10.1016/j.marpolbul.2008.05.017
复制
发表时间：
2008-09-01
影响因子：
5.8
通讯作者：
Yu, Zhiming
中科院分区：
文献类型：
--
作者：
Feng, Zhihua;Song, Xiuxian;Yu, Zhiming
沉积物通常被认为是磷化氢的来源，磷化氢是一种剧毒的、活泼的大气痕量气体。本研究旨在探讨长江口海域基质结合磷化氢(MBP)的季节和空间分布及其与环境的关系。2006年四季共采集了43个表层沉积物，分析了MBP的浓度及相关环境因素。MBP为1.93~94.86 ng kg(-1)干重，平均浓度为17.14 ng kg(-1)dw。翻斗口的MBP浓度高于下河口，这可能是由于上游的污染物输入较多所致。MBP的浓度也随季节变化，11月、8月和5月、2月。沉积物MBP与总磷(TP)、有机磷(OP)、无机磷(W)、有机碳(OC)、总氮(TN)、颗粒大小和氧化还原电位(Eh)呈显著正相关，表明这些沉积环境特征对控制沉积物中MBP的含量起着重要作用。底水中的可溶性活性磷(SRP)、总磷(TP)和叶绿素a(Chla)浓度与沉积物中的MBP呈显著的线性正相关。这些关系可能非常复杂，需要进一步探索。这项工作首次对典型河口沉积物中MBP的季节和空间分布及其与环境因子的关系进行了全面的研究，这将有助于加深对磷(P)生物地球化学循环的理解。(C)2008爱思唯尔有限公司。保留所有权利。
Sediment is commonly considered as a source of phosphine, which is a highly toxic and reactive atmospheric trace gas. This study aims to investigate the seasonal and spatial distribution of matrix-bound phosphine (MBP) and its relationship with the environment in the Changjiang River Estuary. A total of 43 surface sediments were collected in four seasons of 2006, and concentrations of MBP and relative environmental factors were analyzed. MBP ranged from 1.93 to 94.86 ng kg(-1) dry weight (dw) with an average concentration of 17.14 ng kg(-1) dw. The concentrations of MBP in the tipper estuary were, higher than those in the lower estuary, which could be attributed to greater pollutant inputs in the upper estuary. The concentrations of MBP also varied with season, with November > August > May > February. Significant correlations existed between MBP and total phosphorus (TP), organic phosphorus (OP), inorganic phosphorus (W), organic carbon (OC), total nitrogen (TN), the grain size, and redox potential (Eh), suggesting that these sedimentary environmental characteristics played an important role in controlling the MBP levels in the sediments. Notably, there were positive linear relationships between the concentrations of soluble reactive phosphorus (SRP), TP, and chlorophyll a (Chl a) in bottom water and MBP in sediments. These relationships might be very complicated and need further exploration. This work is the first comprehensive study of the seasonal and spatial distribution of MBP in sediments and its relationships with environmental factors in a typical estuary, and will lead to deeper understanding of the phosphorus (P) biogeochemical cycle. (C) 2008 Elsevier Ltd. All rights reserved.