CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China.
CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
Mar Pollut Bull. 2021 Jul;168:112401. doi: 10.1016/j.marpolbul.2021.112401. Epub 2021 Apr 25.
Dynamic variations in chemical composition and size distribution of dissolved copper (Cu) along the river-sea interface in the Yellow River Estuary (China) were investigated. On average, ~64% and ~8% of bulk dissolved Cu (<0.45 μm) were partitioned in the <1 kDa fraction and 1-100 kDa, respectively. The other 28% were in the 100 kDa-0.45 μm colloids, which indicates that this fraction may dominate the overall morphology of colloidal Cu. The <3 kDa Cu fraction was susceptible to environmental parameters and the >3 kDa fraction was related to the behavior of dissolved organic carbon. 1-100 kDa Cu migrated more violently than >100 kDa Cu and tended to be a stable polymer, with stability increasing towards the sea. The source of <1 kDa Cu was complex and may be supplemented by the decomposition of small molecular colloids and the addition of the sediments or particles ligands.
研究了黄河口沿江河界面溶解态铜（Cu）的化学成分和粒径分布的动态变化。平均而言，约 64%和 8%的散装溶解态 Cu（<0.45μm）分别分配在<1 kDa 级分和 1-100 kDa 级分中。其余 28%存在于 100 kDa-0.45 μm 胶体中，这表明该部分可能主导胶体 Cu 的整体形态。<3 kDa Cu 部分易受环境参数的影响，而>3 kDa 部分与溶解有机碳的行为有关。1-100 kDa Cu 的迁移速度比>100 kDa Cu 快，且趋于稳定的聚合物，向海方向稳定性增加。<1 kDa Cu 的来源较为复杂，可能是小分子胶体的分解和沉积物或颗粒配体的添加补充所致。
