da Silva Junior Jucelino B, de Carvalho Vanessa S, Sousa Daniele S, Dos Santos Ivanice F, Brito Geysa B, Queiroz Antônio F S, Ferreira Sérgio L C
Instituto Nacional de Ciência e Tecnologia, INCT, de Energia e Ambiente, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Instituto de Química, Campus Ondina, 40170-270 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Instituto de Geociências, Campus Ondina, 40170-270 Salvador, Bahia, Brazil.
Instituto Nacional de Ciência e Tecnologia, INCT, de Energia e Ambiente, Universidade Federal da Bahia, 40170-115 Salvador, Bahia, Brazil; Universidade Federal da Bahia, Instituto de Química, Campus Ondina, 40170-270 Salvador, Bahia, Brazil.
Mar Pollut Bull. 2022 Jun;179:113730. doi: 10.1016/j.marpolbul.2022.113730. Epub 2022 May 7.
Aquatic ecosystems provide habitats for many organisms. Historically, riverbanks have always been inhabited and exploited for subsistence and navigation. The present study evaluates the contamination and ecological risks caused by potentially toxic elements in surface sediments of the Paraguaçu River, Bahia, Brazil. Seven sediments samples were collected, and eight heavy metals were determined employing inductively coupled plasma spectrometry mass (ICP-MS). The concentrations range as (mg kg) found were 6.78-18.68 for lead, 14.21-42.16 for zinc, 27.61-48.63 for nickel, 2.03-6.50 for chromium, 6.06-12.90 for vanadium, 5.99-13.33 for cupper, 1.25-3.19 for cobalt, and 79.52-286.08 for manganese. Nickel showed significant enrichment (EF: 5.75; 7.62, and 14.11), followed by zinc, which showed moderate enrichment (EF: 2.16; 2.19, and 4.52). These enrichment levels are possible of anthropogenic origin. When the pollution index (PI) was evaluated, the elements V, Ni, Zn, Mn, Co, and Cu were strongly polluted (PI ≥3). In general, the pollution index (PI), geoaccumulation index (I), enrichment factor (EF), and potential ecological risk indices (E and PERI) show that contaminated sediments have adverse effects on aquatic environments, especially for o Mn, Ni, Pb, V, and Zn.
水生生态系统为许多生物提供了栖息地。从历史上看，河岸一直有人居住，并被用于维持生计和航行。本研究评估了巴西巴伊亚州帕拉瓜苏河表层沉积物中潜在有毒元素造成的污染和生态风险。采集了七个沉积物样本，并采用电感耦合等离子体质谱法（ICP-MS）测定了八种重金属。所发现的浓度范围（mg kg）分别为：铅6.78 - 18.68、锌14.21 - 42.16、镍27.61 - 48.63、铬2.03 - 6.50、钒6.06 - 12.90、铜5.99 - 13.33、钴1.25 - 3.19、锰79.52 - 286.08。镍显示出显著富集（富集因子：5.75；7.62和14.11），其次是锌，显示出中等富集（富集因子：2.16；2.19和4.52）。这些富集水平可能源于人为因素。在评估污染指数（PI）时，钒、镍、锌、锰、钴和铜元素受到严重污染（PI≥3）。总体而言，污染指数（PI）、地累积指数（I）、富集因子（EF）和潜在生态风险指数（E和PERI）表明，受污染的沉积物对水生环境有不利影响，尤其是对锰、镍、铅、钒和锌。
