Zhao Jianru, Yang Kehong, Chu Fengyou, Ge Qian, Xu Dong, Han Xibin, Ye Liming
Key Laboratory of Submarine Geosciences, Ministry of Natural Resources, Hangzhou 310012, China; Second Institute of oceanography, Ministry of Natural Resources, Hangzhou 310012, China.
Key Laboratory of Submarine Geosciences, Ministry of Natural Resources, Hangzhou 310012, China; Second Institute of oceanography, Ministry of Natural Resources, Hangzhou 310012, China.
Mar Pollut Bull. 2023 Mar;188:114599. doi: 10.1016/j.marpolbul.2023.114599. Epub 2023 Feb 2.
The concentrations of six heavy metals (Cd, Cr, Cu, Pb, Zn, and As) in offshore surface sediments of western Pearl River Estuary were analyzed to investigate their sources and spatial variations using factorial kriging analysis. Three-scale spatial variations in heavy metal concentrations were identified and separated: nugget, local, and regional scale, which indicated sample errors, anthropogenic pollution and natural variation, respectively. Anthropogenic heavy metals varied sharply and heterogeneous at range of 60 km. Maoming Port, Hailing Bay and coastal area northeastern Hainan Island were potential polluted areas of Cd, Cr, Cu, Pb, Zn and As, also the Nandu River, Baoling River and Wanquan River estuaries were potential polluted areas of As. These polluted areas ranged up to 60 km in size and tended to extend with currents. The natural heavy metals varied continuously and relatively homogeneous at range of 180 km, which was dominated by riverine input and paleo-sea-level changes.
对珠江口西部近岸表层沉积物中六种重金属（镉、铬、铜、铅、锌和砷）的浓度进行了分析，采用因子克里金分析方法研究其来源和空间变化。确定并分离了重金属浓度的三种尺度空间变化：块金效应、局部尺度和区域尺度，分别表示样本误差、人为污染和自然变化。人为源重金属在60公里范围内变化剧烈且不均匀。茂名港、海陵湾和海南岛东北部沿海地区是镉、铬、铜、铅、锌和砷的潜在污染区域，南渡江、保亭河和万泉河河口也是砷的潜在污染区域。这些污染区域面积达60公里，且有随水流延伸的趋势。自然源重金属在180公里范围内连续且相对均匀地变化，主要受河流输入和古海平面变化的影响。
