Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
J Environ Manage. 2018 May 15;214:346-353. doi: 10.1016/j.jenvman.2018.02.081. Epub 2018 Mar 11.
Water resources management is an important public concern. In this study, we examined the extent of sorption/desorption of trace pollutants to soil black carbon (BC) in the water level fluctuation zone (WLFZ) of the middle route of the South to North Water Transfer Project in China. In addition, we investigated the main management measures affecting these processes during the project. The results showed that the pseudo second-order model adequately describes the sorption/desorption of phenanthrene on the soil BC in the WLFZ. Water level fluctuation may indirectly influenced BC sorption/desorption by altering water chemistry. Water level residence time had negative effects on BC sorption in short-term experiments (days to months), but the impact gradually diminished with increased residence time. The results suggested that long-term field monitoring of water chemistry is urgent. During the initial period of water transfer, delaying the water supplies as drinking water source or directly irrigating crops could mitigate the adverse impacts. Future research should focus on the water-soluble products of BC degradation. The findings of this study should be useful in improving sustainable management of water resources for water transfer projects.
水资源管理是一个重要的公共关注点。在本研究中，我们研究了痕量污染物在南水北调中线工程水位波动区（WLFZ）中土壤黑碳（BC）上的吸附/解吸程度。此外，我们还调查了项目期间影响这些过程的主要管理措施。结果表明，拟二阶模型充分描述了在 WLFZ 中土壤 BC 对菲的吸附/解吸。水位波动可能通过改变水化学间接影响 BC 的吸附/解吸。水位停留时间对短期实验（几天到几个月）中的 BC 吸附有负面影响，但随着停留时间的增加，影响逐渐减弱。结果表明，迫切需要对水化学进行长期现场监测。在调水初期，延迟作为饮用水源的供水或直接灌溉作物可以减轻不利影响。未来的研究应侧重于 BC 降解的水溶性产物。本研究的结果对于改进调水工程水资源的可持续管理应该是有用的。
