School of Civil Engineering, Wuhan University, Wuhan, China.
School of Civil Engineering, Wuhan University, Wuhan, China.
Chemosphere. 2021 Sep;278:130206. doi: 10.1016/j.chemosphere.2021.130206. Epub 2021 Mar 22.
A facile method was used to prepare two-dimensional MXene for the treatment of heavy metal ions in wastewater. The adsorbent has good selectivity for the adsorption of Hg (Ⅱ) in mixed divalent cationic metal solutions due to a large number of oxygen-containing functional groups on the surface of the material. The adsorption of mercury was tested using mercuric chloride and mercury nitrate solutions. The Langmuir maximum adsorption capacity of the adsorbent at a pH of 5.0 and a temperature of 30 °C is 1057.3 mg/g (mercuric nitrate) and 773.29 mg/g (mercuric chloride), respectively. The adsorbent also maintains a high adsorption capacity at low pH (pH = 2.0). The removal rate of mercury-containing wastewater within 100 mg/L is nearly 100%. The chemical species of Hg-containing ions at different pH and temperatures was studied. It was found that the adsorbent could maintain a high adsorption capacity for different forms of Hg-containing ions.
一种简便的方法被用于制备二维 MXene，以处理废水中的重金属离子。由于材料表面含有大量含氧官能团，该吸附剂对混合二价阳离子金属溶液中 Hg(Ⅱ)的吸附具有良好的选择性。使用氯化汞和硝酸汞溶液测试了汞的吸附。在 pH 为 5.0 和温度为 30°C 时，吸附剂对汞的朗缪尔最大吸附容量分别为 1057.3 mg/g（硝酸汞）和 773.29 mg/g（氯化汞）。该吸附剂在低 pH（pH=2.0）下也保持高吸附容量。在 100 mg/L 含汞废水中的去除率接近 100%。研究了不同 pH 和温度下含汞离子的化学形态。结果发现，该吸附剂可以保持对不同形态的含汞离子的高吸附容量。
