使用 ZnO-30N-沸石从水中去除腐殖酸和 Cr(Ⅵ)。
Removal of humic acid and Cr(Ⅵ) from water using ZnO-30N-zeolite.
机构信息
College of Chemical Engineering and Materials, Quanzhou Normal University, Quanzhou, 362000, China.
Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, 705 Engineering Research Center, University of Cincinnati, Cincinnati, OH, 45221-0012, USA.
出版信息
Chemosphere. 2021 Sep;279:130491. doi: 10.1016/j.chemosphere.2021.130491. Epub 2021 Apr 5.
The mutual influence of humic acid and Cr(Ⅵ) on water purification using ZnO-30N-zeolite was investigated in the laboratory. The removal of humic acid by ZnO-30N-zeolite with both pollutants present reached 90% in 5 min. With humic acid alone, more than one day was required to reach the same level of removal. Synergy between humic acid and chromium was thus demonstrated in their removal process by ZnO-30N-zeolite. However, the presence of humic acid showed no obvious effect on the removal capacity of Cr(Ⅵ) by ZnO-30N-zeolite. X-ray photoelectron spectra showed that Cr(VI) was reduced to Cr(Ⅲ) in the process by both humic acid and ZnO-30N-zeolite. The kinetic mechanism of synergistic removal of humic acid and Cr(Ⅵ) by ZnO-30N-zeolite in binary pollutant system was also proposed.
研究了腐殖酸和 Cr(Ⅵ)对 ZnO-30N-沸石净化水的相互影响。在有两种污染物存在的情况下，ZnO-30N-沸石对腐殖酸的去除率在 5 分钟内达到 90%。而单独使用腐殖酸则需要一天以上才能达到相同的去除率。因此，ZnO-30N-沸石在去除腐殖酸和铬的过程中表现出协同作用。然而，腐殖酸的存在对 ZnO-30N-沸石去除 Cr(Ⅵ)的去除能力没有明显影响。X 射线光电子能谱表明，腐殖酸和 ZnO-30N-沸石都能将 Cr(VI)还原为 Cr(Ⅲ)。还提出了二元污染物体系中 ZnO-30N-沸石协同去除腐殖酸和 Cr(Ⅵ)的动力学机制。
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