臺灣西部海域鋁含量調查

為配合政府推動再生能源政策，行政院經濟部於102年開始推動「千架海陸風力機」之國家能源計畫，並陸續於臺灣西部具離岸風電開發潛力之海域架建置離岸風機。臺灣位處熱帶與亞熱帶交界處，日照強度大、海水溫度高、相對濕度與空氣中含鹽量均偏高，開發業商為避免風機結構快速劣化，尤其是為減緩基樁因長期海水的侵蝕而減少使用年限，遂積極對風機結構進行防蝕工程，惟防蝕工程主要使用之犧牲陽極法可能造成鋁析出，並隨國內離岸風場開發規模增加及營運而持續影響，犧牲陽極之富集與累積效應對環境衝擊恐有影響之虞，因而有必要對臺灣西部海域進行海域鋁含量調查。惟國內目前由環保署公告之相關標準方法是否適用於海域中鋁之分析研究仍付之闕如，尚待科學驗證。本研究計畫目的即藉由蒐整評析國內外海水中鋁分析方法的適用性與限制，進行整合性綜合評估，並篩選具發展可行性的海水中鋁分析主軸技術，輔以天然海水及合成人工海水為實驗基質進行分析，作為確認技術合適性之可信度研判基礎，並藉由本研究建立臺灣西部海域中鋁含量之背景值。

In support of the government's renewable energy policy, the Ministry of Economic Affairs of the Executive Yuan launched the national energy plan titled "1000 Offshore and Onshore Wind Turbines" in 2013 (the 102nd year of the Republic of China), and successively installed offshore wind turbines in waters off western Taiwan with potential for offshore wind farm development.

Taiwan is located at the boundary between the tropical and subtropical zones, characterized by high solar irradiance, elevated seawater temperature, high relative humidity and high atmospheric salt content. To avoid rapid degradation of wind turbine structures, especially to slow down the erosion of foundation piles by long-term seawater exposure and thus extend their service life, developers have actively carried out anticorrosion engineering on wind turbine structures. However, the sacrificial anode method, the main anticorrosion technique currently used, may cause aluminum precipitation. With the increasing scale of domestic offshore wind farm development and their operational phases, the continuous impacts of such precipitation, as well as the enrichment and accumulation effects of sacrificial anodes, may pose potential environmental risks. Therefore, it is necessary to conduct aluminum content surveys in the waters off western Taiwan.

However, whether the relevant standard methods currently announced by the Environmental Protection Administration are applicable to aluminum analysis in marine waters remains unconfirmed and awaits scientific validation. The purpose of this research project is to collect, organize and evaluate the applicability and limitations of domestic and international analytical methods for aluminum in seawater, conduct a comprehensive integrated assessment, and screen out technically feasible core analytical methods for aluminum in seawater. Additionally, natural seawater and synthetic artificial seawater will be used as experimental matrices for analysis, serving as the basis for verifying the reliability of the selected technologies. Finally, this study will establish the background aluminum content levels in the waters off western Taiwan.