Abstract:In order to explore the fertility status and heavy metals enrichment of sediments in the typical shrimp-rice co-cropping culture ponds at Jianghan Plain, the sediment samples were collected for pH, organic content, cation exchange capacity and 10 kinds of elements (As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, V, and Zn) determination. Geo\|accumulation index(Igeo), pollution load index (PLI), enrichment factor (EF) and ecological risk assessment methods were used to evaluate the monitoring data, as well as correlation analysis and factor analysis. The results showed that pH and cation exchange capacity of surface sediments were generally slightly lower than those of bottom sediments, but the content of organic matter was opposite. Ten kinds of elements were detected in all samples, without obvious difference in concentrations and spatial distribution. Contents of elements in sediments were mostly lower than or equal to those reported in other culture, and a few samples exceeded risk screening value of GB 15618—2018 with As and Cu. Compared with regional background values, 70% of the sites were slight enrichment with Cd, Ni, Zn and Cu, and 56.7% of sediment sites was faced with moderate ecological risk of Cd. The preliminary analysis suggests that aquatic biological activities might have effects on the physicochemical properties of the sediments. Cd, Ni, Zn, and Cu might come from human activities, and other elements might be derived from the earth background. When carrying out non-environmental pollution culture, the culture area should be reasonably planned, and the safety of additives should be paid attention.
刘彬, 熊晶, 郭丽, 余开升, 姚诗源. 江汉平原典型虾稻共作沉积物重金属和砷富集现状[J]. 水产科学, 2023, 42(3): 367-376.
LIU Bin, XIONG Jing, GUO Li, YU Kaisheng, YAO Shiyuan. Heavy Metals and As Enrichment of Sediments in Typical Shrimp-Rice Co-Cropping Culture Ponds at Jianghan Plain. 水产科学, 2023, 42(3): 367-376.
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