Affiliation:
1. Key Laboratory of Po-Yang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province/Development Research Center of Selenium-rich Agricultural Industry, Jiangxi Agricultural University, Nanchang 330045, China
2. Jiangxi Water Resources Institute, Nanchang 330013, China
3. Jiangxi Tourism and Commerce Vocational College, Nanchang 330100, China
4. Yuzhang Normal University, Nanchang 330103, China
Abstract
Abstract
This paper simulates sediment motion under different hydrodynamic conditions, aiming to investigate the release flux of heavy metals in river sediments. During the lab experiments, carried out in a circular rectangular flume device, water velocity in the flume was altered by controlling the gate switch, and the flow rate was controlled from 0 to 1 m/s. Sediment from the Le'an River and chlorine-removed tap water were used as experimental sediment and water, respectively. Through analyses of Cu, Zn, Cd, and Pb concentration in water at different flow rates, the relationship between the release flux (y) of Cu, Zn, Cd, and Pb and the flow rate (x) was established with a fitting error of less than 15%. In order to judge the reliability of the conclusions, experimental results were verified outdoors. The results showed when the sediment particle size is between 0 and 250 μm, within 1 hour, a quadratic polynomial correlation between the release flux of Cu, Cd, and Pb from river sediments and water velocity when the water pH is 5–9 and the flow rate is 0–65 cm/s; when the water pH is 5–9, the flow rate is 0–35 cm/s, the release flux of Zn from river sediments was shown to have a quadratic polynomial relationship with water velocity. The error between the calculated and measured values of heavy metals released from sediment in the Le'an River were within 5–30%. Our results can provide a theoretical reference for the control and treatment of heavy metal pollution in rivers and further improve corresponding water quality models.
Funder
Science and Technology Project of Jiangxi Provincial Water Resources Department
National Natural Science Foundation of China
National Science and Technology Support Program Project of China
Land Development and Consolidation Project in Jiangxi Province
Subject
Water Science and Technology
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献