Chiellini Carolina, Mariotti Lorenzo, Huarancca Reyes Thais, de Arruda Eduardo José, Fonseca Gustavo Graciano, Guglielminetti Lorenzo
Department of Agriculture, Food and Environment, University of Pisa, 56124 Pisa, Italy.
Institute of Agricultural Biology and Biotechnology, Italian National Research Council, 56124 Pisa, Italy.
Plants (Basel). 2022 Jul 3;11(13):1770. doi: 10.3390/plants11131770.
Microalgal-based remediation is an ecofriendly and cost-effective system for wastewater treatment. This study evaluated the capacity of microalgae in the remediation of wastewater from cleaning process of smoked cigarette butts (CB). At laboratory scale, six strains (one from the family Scenedesmaceae, two Chlamydomonas debaryana and three Chlorella sorokiniana) were exposed to different CB wastewater dilutions to identify toxicity levels reflected in the alteration of microalgal physiological status and to determine the optimal conditions for an effective removal of contaminants. CB wastewater could impact on microalgal chlorophyll and carotenoid production in a concentration-dependent manner. Moreover, the resistance and remediation capacity did not only depend on the microalgal strain, but also on the chemical characteristics of the organic pollutants. In detail, nicotine was the most resistant pollutant to removal by the microalgae tested and its low removal correlated with the inhibition of photosynthetic pigments affecting microalgal growth. Concerning the optimal conditions for an effective bioremediation, this study demonstrated that the Chlamydomonas strain named F2 showed the best removal capacity to organic pollutants at 5% CB wastewater (corresponding to 25 butts L−1 or 5 g CB L−1) maintaining its growth and photosynthetic pigments at control levels.
基于微藻的修复是一种用于废水处理的生态友好且具有成本效益的系统。本研究评估了微藻对卷烟烟蒂（CB）清洗过程中产生的废水的修复能力。在实验室规模下，六种菌株（一种来自栅藻科，两种是德巴利衣藻，三种是索氏小球藻）被暴露于不同稀释度的CB废水中，以确定微藻生理状态改变所反映的毒性水平，并确定有效去除污染物的最佳条件。CB废水会以浓度依赖的方式影响微藻叶绿素和类胡萝卜素的产生。此外，抗性和修复能力不仅取决于微藻菌株，还取决于有机污染物的化学特性。具体而言，尼古丁是测试的微藻最难去除的污染物，其去除率低与影响微藻生长的光合色素受到抑制有关。关于有效生物修复的最佳条件，本研究表明，名为F2的衣藻菌株在5%的CB废水（相当于25个烟蒂/L或5 g CB/L）中对有机污染物表现出最佳去除能力，同时其生长和光合色素维持在对照水平。
