磁性镧基吸附剂的制备及其除磷效能研究  

Fabrication of Magnetic Lanthanum-Based Adsorbent and Its Phosphate Removal Performance

作　　者：吴梦雪 张欣桐 隋晓萌 吕建波 

机构地区：[1]烟台大学土木工程学院,山东 烟台

出　　处：《环境保护前沿》2024年第2期246-255,共10页Advances in Environmental Protection

摘　　要：输配水过程中,微生物的再生长往往会使水质恶化。相对于易产生有毒有害副产物的消毒法,本研究采用了更为绿色安全的营养源控制法,通过控制水中的磷源来达到实现水质生物稳定性的目的。首先,采用简单的浸渍–共沉淀法制备得到了磁性镧基吸附剂LFP,并探究了其除磷效果、影响因素及除磷机制,该吸附剂具有较高磷吸附容量(41.61 mgP·g−1)的同时,还具有较高的磷选择性和pH适应性,在pH 3~12均具有较高的磷吸附容量(22.88 mgP·g−1以上)。吸附过程符合Langmuir等温吸附模型及准二级动力学模型,吸附机制包含静电吸引及配体交换作用,此外,吸附剂具有较强的磁性(16.28 emu·g−1),易实现磁分离,使其向实际应用更进一步。The re-growth of microorganisms during water transmission and distribution often deteriorates water quality. Compared with the disinfection method, which is prone to produce toxic and harmful by-products, this study adopted a greener and safer nutrient source control method to achieve water quality biostability by controlling the phosphorus source in water. Firstly, the magnetic lanthanide-based adsorbent LFP was prepared by a simple impregnation-co-precipitation method, and its phosphorus removal effect, influencing factors and phosphorus removal mechanism were investigated. The adsorbent had a high phosphorus adsorption capacity (41.61 mgP·g−1) and also a high phosphorus selectivity and pH adaptability, and it had high phosphorus adsorption capacity (22.88 mgP·g−1) in the range of pH 3~12. The adsorption process was consistent with the Langmuir isothermal adsorption model and the quasi-secondary kinetic model, and the adsorption mechanism included electrostatic attraction and ligand exchange. In addition, the adsorbent possessed strong magnetism (16.28 emu·g−1), which was easy to realize the magnetic separation, and thus it was a step forward to the practical application.

关 键 词：生物稳定性 除磷 磁性吸附剂 吸附 

分 类 号：X70[环境科学与工程—环境工程]