Department of Urban and Civil Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan; School of Environment, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
Chemosphere. 2014 Jan;95:628-34. doi: 10.1016/j.chemosphere.2013.10.023. Epub 2013 Nov 5.
To evaluate contamination of coastal sediments along Fongafale Islet, Central Pacific, a field survey was conducted in densely populated, sparsely populated, open dumping and undisturbed natural areas. Current measurements in shallow water of the lagoon indicated that contaminants from the densely populated area would only be transported for a small proportion of a tidal cycle. Acid-volatile sulfides were detected in both the intertidal beach and nearshore zones of the densely populated area, whereas these were no detection in the other areas. This observation lends support to argument that the coastal pollution mechanism that during ebb tide, domestic wastewater leaking from poorly constructed sanitary facilities seeps into the coast. The total concentrations of Cr, Mn, Ni, Cu, Zn, Cd and Pb were relatively high in all of the areas except the undisturbed natural area. The indices of contamination factor, pollution load index and geoaccumulation index were indicative of heavy metal pollution in the three areas. The densely populated area has the most significant contamination; domestic wastewater led to significant contamination of coastal sediments with Cr, Zn, Cu, Pb and Cd. The open dumping area is noteworthy with respect to Mn and Ni, which can be derived from disposed batteries.
为了评估太平洋中部丰加丰阿莱岛沿海沉积物的污染情况，在人口稠密区、人口稀少区、开放垃圾场和未受干扰的自然区进行了实地调查。泻湖浅水区的水流测量结果表明，来自人口稠密区的污染物在一个潮周期中只会被输送一小部分。在人口稠密区的潮间带海滩和近岸区都检测到了可酸解的硫化物，而在其他地区则没有检测到。这一观察结果支持了这样一种论点，即沿海污染机制是在退潮时，建筑不良的卫生设施中泄漏的生活污水渗入海岸。除了未受干扰的自然区，所有地区的 Cr、Mn、Ni、Cu、Zn、Cd 和 Pb 的总浓度都相对较高。污染因子指数、污染负荷指数和地质累积指数表明这三个地区都存在重金属污染。人口稠密区的污染最严重；生活污水导致 Cr、Zn、Cu、Pb 和 Cd 等重金属对沿海沉积物造成了严重污染。开放垃圾场值得注意的是 Mn 和 Ni，它们可能来自废弃的电池。
