Effect of iron and manganese on ammonium removal from micro-polluted source water by immobilized HITLi7(T) at 2 °C
Effect of iron and manganese on ammonium removal from micro-polluted source water by immobilized HITLi7(T) at 2 °C
复制标题
2℃下铁、锰对固定化HITLi7(T)去除微污染水源水中氨氮的影响
DOI：
10.1016/j.biortech.2019.121367
复制
发表时间：
2019
影响因子：
11.4
通讯作者：
Longyi Lv
中科院分区：
文献类型：
--
作者：
Zejia Zheng;Weiguang Li;Duoying Zhang;Wen Qin;Yi Zhao;Longyi Lv
In this study, trace metals (Fe & Mn) were applied to enhance NH4+-N removal in source water at 2 °C, and 22.7% of initial 2.20 mg/L NH4+-N was removed by pre-treating granular activated carbon (GAC) with Fe & Mn before immobilizingAcinetobacter harbinensisHITLi7Tto form biological activated carbon (BAC). Biomass and dehydrogenase activity (DHA) on this modified BAC were 2.80 × 108CFU/g-DW C and 0.50 mg/L/g-DW C, respectively, both the highest. Additionally, 4.76 times more biomass and 9.76 times higher DHA of HITLi7Twere observed in the cultivation with Fe & Mn dosing. Extracellular polymeric substances (EPS) measurements found Fe & Mn dosing could increase total EPS amount (44.3% higher) and polysaccharide (PS) ratio (1.50% higher) secreted by HITLi7T. According to the results of 3D-excitation-emission matrix (3D-EEM) fluorescence spectra and infrared spectra (FTIR) analysis, Fe and Mn promoted the secretion of tryptophan-like substances and changed functional groups Csingle bondOH, Csingle bondOsingle bondC, Cdouble bondO and COOH, which are associated with protein and PS.
