Influxes of COD in coastal rivers around the Bohai Sea and their contribution for total COD capacity in the Bohai Sea
JIN Chun-hong1,2, LI Zhao-ran2, SHENG Yan-qing2
1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;
2. Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
During August 2013 to October 2014, four seasonal field sampling and investigation were conducted to get the fluxes of COD in 36coastal rivers around the Bohai Sea, the effects of COD on seawater quality were evaluated as well. The results showed that most rivers have been heavily polluted (COD reached grade IV, National Surface Water Quality Standard). However, the maximum values of COD and flux of COD did not appear in the same river. There was no significant correlation was observed between maximum value of COD and the maximum flux of COD. The annual flux of CODCr was the highest (606million tons), followed by the acidic CODMn (62million tons), the flux of alkaline CODMn was the lowest one with 53million tons. In rainy season, the flux of COD shared 68% of total value, followed by normal water season (28%) and the withered water period (only 4%). Approximately 25% of total CODMn (239million tons) in the Bohai Sea was from coastal rivers.
晋春虹, 李兆冉, 盛彦清. 环渤海河流COD入海通量及其对渤海海域COD总量的贡献[J]. 中国环境科学, 2016, 36(6): 1835-1842.
JIN Chun-hong, LI Zhao-ran, SHENG Yan-qing. Influxes of COD in coastal rivers around the Bohai Sea and their contribution for total COD capacity in the Bohai Sea. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1835-1842.
Tian J, Hu Y, Hang J. Chemiluminescence detection of permanganate index (CODMn) by a luminol-KMnO4 based reaction [J]. Journal of Environmental Sciences, 2008,2:252-256.
[2]
Sheng Y, Qu Y, Ding C, et al. A combined application of different engineering and biological techniques to remediate a heavily polluted river [J]. Ecological Engineering, 2013,57:1-7.
[3]
Su S, Li D, Zhang Q, et al. Temporal trend and source apportionment of water pollution in different functional zones of Qiantang River, China [J]. Water Research, 2011,45:1781-1795.
[4]
Ouyang T P, Zhu Z Y, Kuang Y Q. Assessing impact of urbanization on river water quality in the Pearl River Delta Economic Zone, China [J]. Environmental Monitoring & Assessment, 2006,120:313-325.
Zhao X, Wang X, Shi X, et al. Environmental capacity of chemical oxygen demand in the Bohai Sea: modeling and calculation [J]. Chinese Journal of Oceanology and Limnology, 2011,01(1):46-52.
Liu X, Li G, Liu Z, et al. Water pollution characteristics and assessment of lower reaches in Haihe River Basin [J]. Procedia Environmental Sciences, 2010,2(0):199-206.
[12]
Liu S, Lou S, Kuang C, et al. Water quality assessment by pollution-index method in the coastal waters of Hebei Province in western Bohai Sea, China [J]. Marine pollution bulletin, 2011, 62(10):2220-2229.
Li Z, Sheng Y, Shi W, et al. Influence of salinity on COD measurements in coastal water management [J]. Desalination and Water Treatment 2015, doi: 10.1080/19443994.2015.1091996.
Guo J, Liu X, Xie Q. Characteristics of the Bohai Sea oil spill and its impact on the Bohai Sea ecosystem [J]. Chinese Science Bulletin, 2013,58(19):2276-2281.
[31]
Yan H K, Wang N, Yu T L, et al. Comparing effects of land reclamation techniques on water pollution and fishery loss for a large-scale offshore airport island in Jinzhou Bay, Bohai Sea, China [J]. Marine Pollution Bulletin, 2013,71(1/2):29-40.
[32]
Zhang Z, Zhu M, Wang Z, et al. Monitoring and managing pollution load in Bohai Sea, PR China [J]. Ocean & Coastal Management, 2006,49(9/10):706-716.
[33]
Tao J H. Numerical simulation of aquatic Eco-environment of Bohai bay [J]. Journal of Hydrodynamics, 2006,18(3):34-42.
