Batan Bay in Aklan, Philippines supports a population largely dependent on coastal fisheries. The development of aquaculture technologies coupled with over-crowded fish pens has negatively affected its natural dynamics and environmental quality. Land-use activities including ports and shipyard further aggravate the problem by contributing to chemical pollution. The present study applied sequential extraction techniques to determine the geochemical speciation of metals in fishpond sediments. Samples were processed and analyzed for Cu, Cd, and Pb using flame atomic absorption spectroscopy. Copper (Cu) showed the highest concentration (10.61–66.81 μg/g-dry weight of sediment). Lead (Pb) content ranged from below detection limit to 15.14 μg/g, while Cd concentration ranged from below detection limit to 2.50 μg/g. Fractionation study showed that the Cu present in the fishpond sediments is mostly non-residual (50.03–73.34%) and significantly associated with the oxidizable fraction (33.89–64.75%). In contrast, the residual fraction served as the dominant host of Pb (33.55–62.68%) in the sediments. Comparison of the results with US EPA and NOAA sediment quality guidelines also revealed that the Batan Bay sediments may be considered generally non-polluted with respect Cu, Pb, and Cd, and not expected to cause adverse effects to aquatic organisms under normal conditions. However, under certain redox conditions, most of the sites may be considered moderately polluted as a result of Cu mobilization from the non-residual fractions of the sediments. Overall, geochemical speciation studies in an important fishery area like Batan Bay will provide valuable insights into the availability of metal contaminants to aquatic organisms under certain environmental conditions.

菲律宾阿克兰的巴丹湾（Batan Bay）支持着很大程度上依赖沿海渔业的人口。水产养殖技术的发展以及过度拥挤的鱼栏已经对其自然动力和环境质量产生了负面影响。包括港口和造船厂在内的土地使用活动通过加剧化学污染进一步加剧了这一问题。本研究应用顺序提取技术来确定鱼塘沉积物中金属的地球化学形态。处理样品并使用火焰原子吸收光谱法分析样品中的Cu，Cd和Pb。铜（Cu）显示最高浓度（10.61–66.81μg/ g沉积物干重）。铅（Pb）含量在检测限以下至15.14μg/ g，而镉浓度在检测限以下至2.50μg/ g。分馏研究表明，鱼池沉积物中的铜大部分为非残留（50.03–73.34％），并且与可氧化部分显着相关（33.89–64.75％）。相反，残余部分是沉积物中铅的主要主体（33.55-62.68％）。将结果与美国EPA和NOAA沉积物质量指南进行比较，还表明，巴坦湾沉积物通常被认为在Cu，Pb和Cd方面无污染，在正常情况下不会对水生生物造成不利影响。但是，在某些氧化还原条件下，由于铜从沉积物的非残留部分中迁移出来，因此大多数场地可能被认为是中等污染的。总体，