ABSTRACT

Sediment microbial fuel cells (SMFCs) have been used for treating pollutants in sediment or overlying water. This study investigated the feasibility of constructing SMFCs under aquaculture conditions by employing indigenous carbohydrates as substrates to enhance the removal efficiency of polycyclic aromatic hydrocarbons (PAHs) in sediment, as well as the correlation between PAHs removal and electricity generation in SMFCs. The results showed that adding glucose could allow SMFCs to generate more electrical power and increase the removal efficiency of PAHs (by 57.2% for naphthalene, 41.3% for acenaphthene, and 36.5% for pyrene). In addition, starch enhanced PAHs removal by 49.9%, 35.8%, and 31.2%, respectively, whereas cellulose enhanced removal by 44.3%, 29.3%, and 26.9%, respectively. Pearson correlation coefficients between the level of electrical power generated and the removal masses of the three PAHs were 0.485, 0.830**, and 0.851**. Thus, the use of SMFCs could be an effective approach for PAH treatment in aquaculture, and the electrical power generated could be used as an in-situ indicator for the biodegradation rate of SMFCs.

摘要

沉积物微生物燃料电池 (SMFC) 已用于处理沉积物或上覆水中的污染物。本研究调查了在水产养殖条件下构建 SMFCs 的可行性，以原生碳水化合物为底物，提高沉积物中多环芳烃 (PAHs) 的去除效率，以及 PAHs 去除与 SMFCs 发电之间的相关性。结果表明，添加葡萄糖可以使SMFCs产生更多的电能并提高PAHs的去除效率（萘提高57.2%，苊提高41.3%，芘提高36.5%）。此外，淀粉分别提高了 49.9%、35.8% 和 31.2% 的 PAHs 去除率，而纤维素分别提高了 44.3%、29.3% 和 26.9% 的去除率。产生的电能水平与三种 PAHs 的去除质量之间的 Pearson 相关系数分别为 0.485、0.830** 和 0.851**。因此，使用 SMFC 可能是水产养殖中 PAH 处理的有效方法，产生的电能可用作SMFCs生物降解率的原位指标。