Contents of 26 heavy metals in the 39 offshore surface sediments of Jiulong River were determined by inductively coupled plasma mass spectrometry(ICP-MS), atomic fluorescence spectrometry(AFS) and atomic absorption spectrometry(AAS). Geo-accumulation index and potential ecological risk index were applied to evaluate the pollution degree and potential ecological risk of heavy metals, and multivariate statistical methods were applied to speculate the main sources of these heavy metals. The results showed that the distributions of heavy metals were different in three regions of Jiulong River(north creek, western creek and estuary), the high contents of Mn, Zn, Cd, Mo, Sb, Cs, Y, Th and U elements appeared in the north creek and western creek, and the high contents of Fe, Ni, Cr, V, Co, Sc, Li, Rb, Sr, Tl and Ga elements appeared in the estuary. Most of these elements were enriched in the sediments. The results of pollution assessment by geo-accumulation index revealed that the pollution degree of Cd was the highest and at a serious polluted level in 10.3% of the samplings. The assessment results of potential ecological risk indicated that the potential ecological risk of heavy metals showed the order of Cd >Hg >Cu >Pb >Ni >Co >Cr >Mn >Zn >V. Cd and Hg contributed the most to the total potential ecological risk, accounting for 78.1% and 12.1%, respectively. The results of multivariate statistics analysis indicated that the source of Fe, Mn, Zn, Pb, Cu, Cr, Cd, Hg, Mo, Sb and Bi were mainly from agricultural activities and mining activities; the source of Ni, Co, Sc, Li, Rb, Sr, Be, Ga and Tl were mainly from burning fossil fuels; and the source of Ba, Y, V, Th, U and Cs were mainly from the rock weathering of granite.
林承奇, 胡恭任, 于瑞莲, 杨秋丽, 余伟河. 九龙江近岸表层沉积物重金属污染评价及来源解析[J]. 中国环境科学, 2016, 36(4): 1218-1225.
LIN Cheng-qi, HU Gong-ren, YU Rui-lian, YANG Qiu-li, YU Wei-he. Pollution assessment and source analysis of heavy metals in offshore surface sediments from Jiulong River. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(4): 1218-1225.
Arnason J G, Fletcher B A. A 40+ year record of Cd, Hg, Pb, and U deposition in sediments of Patroon Reservoir, Albany County, NY, USA[J]. Environmental Pollution, 2003,123(3):383-391.
[2]
Ghrefat H, Yusuf N. Assessing Mn, Fe, Cu, Zn, and Cd pollution in bottom sediments of Wadi Al-Arab Dam, Jordan[J]. Chemosphere, 2006,65(11):2114-2121.
[3]
Chakraborty P, Babu P V R, Vudamala K, et al. Mercury speciation in coastal sediments from the central east coast of India by modified BCR method[J]. Marine Pollution Bulletin, 2014, 81(1):282-288.
[4]
Sun Y, Zhou Q, Xie X, et al. Spatial, sources and risk assessment of heavy metal contamination of urban soils in typical regions of Shenyang, China[J]. Journal of Hazardous Materials, 2010, 174(1):455-462.
[5]
Wang S, Jia Y, Wang S, et al. Fractionation of heavy metals in shallow marine sediments from Jinzhou Bay, China[J]. Journal of Environmental Sciences, 2010,22(1):23-31.
Bindu K R, Deepulal P M, Gireeshkumar T R, et al. Evaluation of heavy metal enrichment in Cochin estuary and its adjacent coast:multivariate statistical approach[J]. Environmental Monitoring and Assessment, 2015,187(8):519.
[8]
Venkatramanan S, Chung S Y, Ramkumar T, et al. Environmental monitoring and assessment of heavy metals in surface sediments at Coleroon River Estuary in Tamil Nadu, India[J]. Environmental Monitoring and Assessment, 2015,187(8):505.
Gray C W, Mclaren R G, Roberts A H C. The effect of long-term phosphoic fertilizer applications on the amounts and forms of cadmium in soils under pasture in New Zealand[J]. Nutrient Cycling in Agroecosystems, 1999,54(3):267-277.
[23]
Lv J S, Liu Y, Zhang Z L, et al. Identifying the origins and spatial distributions of heavy metals in soils of Ju country(Eastern China) using multivariate and geostatistical approach[J]. Journal of Soils and Sediments, 2015,15(1):163-178.
[24]
Chen T, Liu X, Zhu M, et al. Identification of trace element sources and associated risk assessment in vegetable soils of the urban-rural transitional area of Hangzhou, China[J]. Environmental Pollution, 2008,151(1):67-78.
Zhang L, Chen M, Yang W, et al. Size-fractionated thorium isotopes(228Th, 230Th, 232Th) in surface waters in the Jiulong River estuary, China[J]. Journal of Environmental Radioactivity, 2004,78(2):199-216.