摘要
水体的富营养化主要与硝酸盐和磷酸盐有关,但目前的处理方法大多只对其中一种污染物有去除效果。制备的负载型Fe/Ni双金属复合材料(DOW 3N-Fe/Ni)能实现NO_3^-和PO_4^(3-)的同步去除。当NO_3^--N为20 mg/L,PO_4^(3-)-P为1 mg/L时,NO_3^-和PO_4^(3-)的去除率分别可达70%和99%。探讨了DOW 3N-Fe/Ni同步去除NO_3^-和PO_4^(3-)的机理,铁镍金属在还原NO_3^-的过程中被氧化为金属离子或金属氧化物及氢氧化物,并通过Lewis酸碱理论、静电作用及吸附作用去除PO_4^(3-),实现NO_3^-和PO_4^(3-)的同步去除。
The eutrophication of water bodies is mainly in relation to nitrate and phosphate.However,most treatment methods at present can have removing effects only on one kind of the pollutants.The home-made bimetal Fe/Na supported composite materials（DOW 3N-Fe/Ni） can realize the simultaneous removal of nitrate/phosphate.When NO3--N is 20 mg/L,and PO43--P 1 mg/L,the removing rates of NO3- and PO43- can research 70% and 99%,respectively.The mechanisms of simultaneous removal of nitrate/phosphate by using DOW 3N-Fe/Ni are discussed.It is known that Fe/Ni metals in the reduction process of NO3- are oxidized as metallic ions or metallic oxidants and hydroxide.Based on Lewis acid-base theory,electrostatic effect,and adsorption effect on the removal of PO43-,the simultaneous removal of NO3-and PO43- is achieved.
出处
《工业水处理》
CSCD
北大核心
2017年第5期53-57,共5页
Industrial Water Treatment
基金
国家自然科学基金青年科学基金项目(21407043)
河南省教育厅科学技术研究重点项目(14A610003)
河南省高等学校重点科研项目应用研究(16A610009)
关键词
Fe/Ni双金属
纳米颗粒
硝酸盐
磷酸盐
同步去除
Fe/Ni bimetallic nanoparticles
nanoparticle
nitrate
phosphate
simultaneous removal
