School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
J Agric Food Chem. 2020 Mar 11;68(10):3050-3060. doi: 10.1021/acs.jafc.9b07540. Epub 2020 Mar 2.
Industrial wastewater has brought great disaster to water bodies and soils and seriously affected the growth of crops. It is necessary to prepare a stable, effective, and sustainable treatment agent to control water pollution to obtain clean water. The adsorption effect of a lignosulfonate-lysine hydrogel (CLS-Lys adsorbent) on heavy metal ions (Cu and Co) in water is studied. In the synthesis experiment, a response surface method is used to optimize the content of sodium lignosulfonate, lysine, initiator, and cross-linker. The CLS-Lys adsorbent is characterized by Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, thermal analysis, and zeta potential analysis. The performance of the CLS-Lys adsorbent under different influencing factors is studied. The kinetic and isothermal models of the CLS-Lys adsorbent are established. The results show that the main adsorption model of the CLS-Lys adsorbent is chemical adsorption, accompanied by electrostatic adsorption. These two ions have a competitive adsorption relationship, and when the two ions are present at the same time, they inhibit each other. In addition, the CLS-Lys adsorbent has good adsorption and analytical regeneration performance. It is an economic and effective adsorbent and has a broad application prospect.
工业废水给水体和土壤带来了巨大灾难，严重影响了农作物的生长。有必要制备一种稳定、有效、可持续的处理剂来控制水污染，以获得清洁水。研究了木质素磺酸钠-赖氨酸水凝胶（CLS-Lys 吸附剂）对水中重金属离子（Cu 和 Co）的吸附效果。在合成实验中，采用响应面法优化了木质素磺酸钠、赖氨酸、引发剂和交联剂的含量。采用傅里叶变换红外光谱、场发射扫描电子显微镜、热分析和 Zeta 电位分析对 CLS-Lys 吸附剂进行了表征。研究了不同影响因素下 CLS-Lys 吸附剂的性能。建立了 CLS-Lys 吸附剂的动力学和等温吸附模型。结果表明，CLS-Lys 吸附剂的主要吸附模型为化学吸附，伴有静电吸附。这两种离子存在竞争吸附关系，当两种离子同时存在时，它们相互抑制。此外，CLS-Lys 吸附剂具有良好的吸附和分析再生性能。它是一种经济有效的吸附剂，具有广阔的应用前景。
