Kwambai Cherono Sheilah, Ennaceri Houda, Lymbery Alan J, Laird Damian W, Cosgrove Jeff, Moheimani Navid Reza
Algae Innovation Hub, Murdoch University, Perth, WA 6150, Australia.
Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, Perth, WA 6150, Australia.
Toxins (Basel). 2025 Aug 6;17(8):395. doi: 10.3390/toxins17080395.
spp. blooms and paralytic shellfish poisoning pose serious economic threats to coastal communities and aquaculture. This study evaluated the removal efficiency of two strains using natural kaolinite clay (KNAC) and kaolinite with polyaluminum chloride (KPAC) at three concentrations (0.1, 0.25, and 0.3 g L), two pH levels (7 and 8), and two cell densities (1.0 and 2.0 × 10 cells L) in seawater. PAC significantly enhanced removal, achieving up to 100% efficiency within two hours. Zeta potential analysis showed that PAC imparted positive surface charges to the clay, promoting electrostatic interactions with negatively charged algal cells and enhancing flocculation through Van der Waals attractions. In addition, the study conducted a cost estimate analysis and found that treating one hectare at 0.1 g L would cost approximately USD 31.75. The low KPAC application rate also suggests minimal environmental impact on benthic habitats.
某些物种的大量繁殖以及麻痹性贝类中毒对沿海社区和水产养殖业构成了严重的经济威胁。本研究评估了在海水中，两种菌株在三种浓度（0.1、0.25和0.3 g/L）、两个pH值水平（7和8）以及两种细胞密度（1.0和2.0×10个细胞/L）条件下，使用天然高岭土粘土（KNAC）和添加聚合氯化铝的高岭土（KPAC）的去除效率。聚合氯化铝显著提高了去除效率，在两小时内可达100%。zeta电位分析表明，聚合氯化铝赋予粘土正表面电荷，促进与带负电荷的藻类细胞的静电相互作用，并通过范德华引力增强絮凝作用。此外，该研究进行了成本估算分析，发现以0.1 g/L的浓度处理一公顷大约需要31.75美元。低聚合氯化铝应用率还表明对底栖生境的环境影响最小。
