WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, Scotland, UK.
Colloids Surf B Biointerfaces. 2011 Jan 1;82(1):71-80. doi: 10.1016/j.colsurfb.2010.08.019. Epub 2010 Aug 18.
The potential of chitosan, a fishery waste-based material, as a soil amendment to clean-up metal contaminated soil was investigated. Chitosan was treated using glutaraldehyde (GLA), epichlorohydrin (ECH) and ethylene glycol diglycidyl ether (EGDE) as cross-linking reagents to enhance its chemical stability in acidic media and to improve its physical properties. Cross-linking treatment had significant effects on chitosan surface area, pore diameter, surface morphology and crystallinity. Interaction with Ag(I), Pb(II) and Cu(II) decreased the crystallinity of the materials and changed their surface morphology significantly. FTIR analysis confirmed that N and O atoms served as binding sites for the metal ions. Chitosan and treated chitosans were able to bind metal ions, even in the presence of K(+), Cl(-) and NO(3)(-), which are dominant ions in soil. Therefore, remediation of metal contaminated soil using chitosan and cross-linked treated chitosans as soil amendments is feasible.
研究了壳聚糖作为一种渔业废弃物基材料，通过戊二醛（GLA）、表氯醇（ECH）和乙二醇二缩水甘油醚（EGDE）作为交联剂处理，以提高其在酸性介质中的化学稳定性，并改善其物理性能，作为土壤改良剂来修复受金属污染土壤的潜力。交联处理对壳聚糖的表面积、孔径、表面形态和结晶度有显著影响。与 Ag（I）、Pb（II）和 Cu（II）的相互作用降低了材料的结晶度，并显著改变了它们的表面形态。FTIR 分析证实 N 和 O 原子是金属离子的结合位点。壳聚糖和交联处理的壳聚糖能够结合金属离子，即使在 K（+）、Cl（-）和 NO（3）（-）存在的情况下也是如此，这些离子是土壤中主要的离子。因此，使用壳聚糖和交联处理的壳聚糖作为土壤改良剂修复受金属污染的土壤是可行的。
