Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China.
Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China.
J Colloid Interface Sci. 2021 Dec 15;604:272-280. doi: 10.1016/j.jcis.2021.06.137. Epub 2021 Jun 28.
High-efficiency dispersion and enhanced biodegradation play important roles in the treatment of oily wastewater. Due to the flaws of chemical surfactants, it is necessary to study the alternative dispersants that are eco-friendly and sustainable. Therefore, applying natural attapulgite (ATP) to coat Brevibacillus parabrevis for dispersion and biodegradation was studied.
To capture negatively charged bacteria in water, ATP was modified by positively charged Poly (allylamine hydrochloride) (PAH). The capturing capability of Poly (allylamine hydrochloride)-attapulgite (PAH-ATP) particles for bacterial cells, emulsification of PAH-ATP particles and bacteria on oil, toxicity of PAH-ATP to bacteria, biodegradation of oil, etc., were comprehensively investigated.
PAH-ATP modified bacteria show a highly effective emulsification for oil due to the synergism of PAH-ATP and bacteria. The emulsion stabilized by (PAH-ATP)@bacteria presents small and stable oil droplets in one month, which is benefit for the following biodegradation. Compared with bare bacteria and PAH-ATP, PAH-ATP can capture bacteria to the surface of the oil droplets which can greatly improve the degradation of oil pollution. Importantly, the presence of PAH-ATP does not inhibit the reproduction and activity of bacteria. Treatment of oily wastewater by combining natural nanoparticles and oil-degrading bacteria has the advantages of economy, environmental protection, and sustainability.
高效分散和增强生物降解在处理含油废水方面起着重要作用。由于化学表面活性剂的缺陷，有必要研究环保且可持续的替代分散剂。因此，研究了应用天然凹凸棒石（ATP）对 Brevibacillus parabrevis 进行分散和生物降解。
为了捕获水中带负电荷的细菌，ATP 通过带正电荷的聚（盐酸烯丙胺）（PAH）进行修饰。全面研究了聚（盐酸烯丙胺）-凹凸棒石（PAH-ATP）颗粒对细菌细胞的捕获能力、PAH-ATP 颗粒和细菌对油的乳化作用、PAH-ATP 对细菌的毒性、油的生物降解等。
由于 PAH-ATP 和细菌的协同作用，PAH-ATP 修饰的细菌对油具有高效的乳化作用。（PAH-ATP）@细菌稳定的乳液在一个月内呈现出小而稳定的油滴，这有利于随后的生物降解。与裸菌和 PAH-ATP 相比，PAH-ATP 可以将细菌捕获到油滴的表面，这可以大大提高油污染的降解。重要的是，PAH-ATP 的存在不会抑制细菌的繁殖和活性。将天然纳米颗粒和石油降解菌结合处理含油废水具有经济、环保和可持续的优点。
