CAJ | 학술논문

研究了蔗渣木质素在不同的吸附时间、pH值、溶液浓度、木质素用量等条件下对Pb2＋、Cd2＋、Hg2＋3种重金属离子的吸附作用，探讨了蔗渣木质素的等温吸附规律及吸附性能。实验结果表明：木质素吸附平衡时间约为15 min；溶液pH值是影响木质素对重金属吸附能力的主要因素，吸附量随pH值升高而增加；木质素对3种重金属离子皆有一定的吸附作用，吸附量次序为Pb2＋（21.62 mg/g）＞Hg2＋（7.65mg/g）＞Cd2＋（3.32 mg/g）。Redlich-Peterson与Langmiur等温吸附模型可以较好的描述蔗渣木质素对3种重金属离子的吸附特性，其吸附过程属于优惠吸附。本结果可为用蔗渣木质素开发吸附重金属食品添加剂提供科学依据。
연구료자사목질소재불동적흡부시간、pH치、용액농도、목질소용량등조건하대Pb2＋、Cd2＋、Hg2＋3충중금속리자적흡부작용，탐토료자사목질소적등온흡부규률급흡부성능。실험결과표명：목질소흡부평형시간약위15 min；용액pH치시영향목질소대중금속흡부능력적주요인소，흡부량수pH치승고이증가；목질소대3충중금속리자개유일정적흡부작용，흡부량차서위Pb2＋（21.62 mg/g）＞Hg2＋（7.65mg/g）＞Cd2＋（3.32 mg/g）。Redlich-Peterson여Langmiur등온흡부모형가이교호적묘술자사목질소대3충중금속리자적흡부특성，기흡부과정속우우혜흡부。본결과가위용자사목질소개발흡부중금속식품첨가제제공과학의거。
Absorption effects of bagasse lignin on Pb2+,Cd2+and Hg2+in different absorption times,pH values, solution concentrations and amount of lignin were studied,and isothermal absorption laws and absorption proper-ties were also discussed.The results were as following:1 )Absorption equilibrium time of lignin was 15 min;2) pH of solution was the main factor for the effects of lignin on such heavy metal ions as Pb2+,Cd2+and Hg2+, and the absorption amounts went up with the increase of pH;3 )Lignin had certain absorption function on three heavy metal ions,and the amounts of absorption were Pb2+(21.62 mg/g)>Hg2+(7.65 mg/g)>Cd2+(3.32 mg/g.The absorption properties of bagasse lignin on heavy metal ions can be well described by Redlich-Peterson and Langmuir isothermal absorption models,and the process was favorable absorption.This study will provide scientific basis on developing food additives of adsorption heavy metals from bagasse lignin.