当社グループは 3,000 以上の世界的なカンファレンスシリーズ 米国、ヨーロッパ、世界中で毎年イベントが開催されます。 1,000 のより科学的な学会からの支援を受けたアジア および 700 以上の オープン アクセスを発行ジャーナルには 50,000 人以上の著名人が掲載されており、科学者が編集委員として名高い
。オープンアクセスジャーナルはより多くの読者と引用を獲得
700 ジャーナル と 15,000,000 人の読者 各ジャーナルは 25,000 人以上の読者を獲得
Tom Brown
This study aimed to evaluate the contamination of heavy metals in auto-mechanic dumpsites located in the Makurdi metropolis, specifically in Kanshio (K), Northbank (NB), and Wadata (W) areas. The heavy metal concentrations (Cd, Cu, Pb, and Zn) were determined using an atomic absorption spectrophotometer (PG990). The mean concentrations of these heavy metals were found to exceed their respective reference permissible levels in the soil, as defined by World Health Organization (WHO), United States Environmental Protection Agency (USEPA), Mean Shale Concentration (MSC), and World Surface Rock Average (WSRA) guidelines. This indicates a significant level of pollution in the area, possibly attributed to activities such as welding, lead battery repairs, and coatings. Geo-accumulation index, contamination factor, and pollution load index were employed to assess the extent of contamination