期刊论文

中文

林业科学

1001-7488

2018

54

3

117-122

10.11707/j.1001-7488.20180312

“十一五”科技支撑计划项目(2006BAD18B04) “十二五”科技支撑计划项目(2012BAD21B05)。

本校为第一机构

【目的】对单宁进行化学改性制备改性单宁生物质吸附剂,并对其性能进行表征,为天然单宁在重金属离子污染治理中的应用提供技术基础。【方法】以杨梅单宁(BT)和马占相思单宁(AMT)为原料,在碱性条件下,甲醛先与缩合单宁反应生成羟甲基化单宁,再以聚丙烯酰胺(PAM)中的酰胺基为亲核试剂,与羟甲基化单宁反应,分别生成不溶于水的改性杨梅单宁吸附剂(PBT)和马占相思单宁吸附剂(PAMT),通过扫描电镜(SEM) 、能谱分析(EDS)和红外光谱(FTIR)对单宁改性与吸附Pb(Ⅱ)和Cu(Ⅱ)前后的物理化学特性进行分析,对比研究BT、 AMT、PAM、PBT和PAMT对Pb(Ⅱ)和Cu(Ⅱ)的吸附性能。【结果】BT和AMT在改性过程中发生了有效...

Objective: The present work is for studying the preparation of adsorbent with modified tannin to provide technical basis for the application of natural tannin in the treatment of heavy metal ions pollution. Method:With bayberry tannin (BT) and acacia mangium tannin (AMT) as raw material, the formaldehyde reacted with condensed tannin to form hydroxyl methylated tannin under alkaline conditions. Then the amide group of polyacrylamide (PAM), as nucleophilic reagent, reacted with hydroxyl methylated tannin to prepare bayberry tannin adsorbent PBT ...