State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou, China.
State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou, China.
Carbohydr Polym. 2018 Aug 1;193:221-227. doi: 10.1016/j.carbpol.2018.04.003. Epub 2018 Apr 3.
The utilization of waste paper, an obsolete recyclable resource, helps to save resources and protect environment. In this paper, an aerogel was prepared to convert the waste paper into a useful material, which was used to adsorb heavy metal ions and handle water pollution. Combining waste office paper and chitosan, the aerogel obtained the enhanced mechanical strength, acid resistance and high adsorption capacity (up to 156.3 mg/g for Cu). This adsorption process obeyed the pseudo-second order model and the Langmuir model. The research showed that a coordination compound was formed between amino group and Cu during the adsorption process. The adsorbent could be regenerated well in 0.1 M HSO with up to 98.3% desorption efficiency. The low cost, environmental friendliness, excellent adsorption capacity and regeneration ability made this novel aerogel a promising adsorbent for heavy metal ions. And this conversion is an effective reuse way of waste paper too.
废纸是一种废弃的可回收资源，其再利用有助于节约资源和保护环境。本文将废纸转化为具有实际用途的气凝胶，用于吸附重金属离子，处理水污染问题。通过将办公废纸与壳聚糖复合，制得的气凝胶具有增强的机械强度、耐酸性能和高吸附能力（对 Cu 的吸附量高达 156.3 mg/g）。吸附过程符合准二级动力学模型和 Langmuir 吸附等温模型。研究表明，在吸附过程中氨基与 Cu 之间形成了配位化合物。该吸附剂在 0.1 M HSO 中可很好地再生，解吸率高达 98.3%。这种新型气凝胶具有成本低、环境友好、吸附容量大、再生能力强等优点，有望成为一种用于吸附重金属离子的吸附剂。这种转化也是废纸的一种有效再利用方式。
