Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China.
Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, PR China.
Chemosphere. 2020 Jan;238:124543. doi: 10.1016/j.chemosphere.2019.124543. Epub 2019 Aug 8.
Nano micro-electrolysis materials (nMETs) have been used to degrade refractory pollutants in batch experiments. The reasonable formation mechanism of nMETs was given through DMXY digital biomicroscopy. Based on the kinetic data of Chlortetracycline (CTC) removal by nMETs in batch experiments, combined with the binomial distribution equation of CTC reduction by nano materials an experimental-scale fluidized bed (ESFB) was designed. The effects of CTC removal performance, pH and iron ion concentration were investigated. Under pure CTC solution environment, the experimental data showed that the average removal rates of CTC by nMET and nano micro-electrolysis material with loading copper (Cu-nMET) are 90.0% and 95.7% in ESFB, respectively. In the presence of nitrate, although the consumption of two kinds of nano-materials increased, their removal efficiencies of pollutants have 2.2%, 0.2% increase compared with the nitrate-free ESFB. At the same time, the CTC degradation pathway and the enhanced removal mechanism by Cu-nMET was proposed. Through microelectrolysis reaction, complexation reaction and the active substances produced, the intermediate products can be degraded completely to NH, CO, HO and so on. This study aims to provide a theoretical basis for the environmental application of nMETs.
纳米微电解材料（nMETs）已被用于批量实验中降解难处理的污染物。通过 DMXY 数字生物显微镜给出了 nMETs 的合理形成机制。基于 nMETs 在批量实验中去除土霉素（CTC）的动力学数据，结合纳米材料还原 CTC 的二项式分布方程，设计了实验规模的流化床（ESFB）。考察了 CTC 去除性能、pH 值和铁离子浓度的影响。在纯 CTC 溶液环境下，实验数据表明，nMET 和负载铜的纳米微电解材料（Cu-nMET）在 ESFB 中对 CTC 的平均去除率分别为 90.0%和 95.7%。在存在硝酸盐的情况下，虽然两种纳米材料的消耗增加，但它们对污染物的去除效率与无硝酸盐的 ESFB 相比分别提高了 2.2%和 0.2%。同时，提出了 Cu-nMET 增强去除机制的 CTC 降解途径。通过微电解反应、络合反应和产生的活性物质，中间产物可以完全降解为 NH、CO、HO 等。本研究旨在为 nMETs 的环境应用提供理论依据。
