KMnO4改良水华蓝藻对重金属Cd的吸附特性

KMnO4改良水华蓝藻对重金属Cd的吸附特性(6200字)

摘要：生物吸附作为目前重金属废水处理中最有前途的方法之一，其吸附机理、吸附量影响因素、吸附模型、吸附工艺以及各种生物吸附剂的吸附特性等已被广泛研究。而水华蓝藻生物质是富营养化水体爆发蓝藻水华后的大量蓝藻细胞，如何合理利用这些水华蓝藻生物质是当前的世界难题。有研究表明，蓝藻细胞对重金属有较好的吸附效果，但是在吸附效率上仍然有很大提升空间。本文主要研究了关于利用高锰酸钾改良蓝藻吸附效率的一些研究，主要有锰酸钾和氧化藻细胞的最佳比例，不同Cd浓度下藻细胞对Cd的吸附特性，不同pH条件下藻细胞对Cd的吸附特性以及吸附动力学研究。结果表明，0.2g/l高锰酸钾为最佳氧化浓度，碱性条件有利于Cd2+吸收等
关键词：蓝藻；高锰酸钾；重金属Cd；生物吸附。

Adsorptional characteristics of KMnO4 modified bloom-forming cyanobacterial to heavy metal Cd

Abstract As one of the most promising approach of heavy metal wastewater treatment, biological adsorption’s adsorption mechanism, the adsorption capacity of influencing factors, the adsorption model, adsorption process, as well as a variety of adsorption characteristics of biological adsorbent has been studied extensively. And the biomass of cyanobacterial is blue-green algae's cell when Blue-green algae bloom occurs.it has become a great problem in the world that how could human beings  take advantage of these cyanobacterial, The research indicates , cyanobacterial have a good performance in heavy metal treatment, however, there is still much room for improvement in the adsorption efficiency. This article introduces some research on the use of KMnO4 modified cyanobacteria adsorption efficiency, mainly included the optimum ratio of KMnO and oxidation of algal cells, the adsorption characteristics of algal cells to Cd under different Cd concentration, and the adsorption characteristics of the algal cells to Cd and adsorption kinetics under different pH conditions. finally ,text result  indicates that KMnO4 liguors's best density is 0.2mg/l ,and alkalinity environment benefits Cd2+'s absord
Keywords: cyanobacteria ; KMnO4; heavy metal Cd; biological adsorption
 

目  录

摘要    4
关键词    4
1 前言    5
1.1 课题研究背景及意义    5
1.2 国内外研究现在    5
1.21 藻类处理含重金属离子废水的机理    5
1.22 藻类处理含重金属离子废水的应用情况    5
1.23 pH 对吸附的影响    6
2研究目的和内容    6
2.1研究目的    6
2.2研究内容    6
3材料准备    6
4实验方法    7
4.1 前期准备    7
4.2最佳比例研究方法    7
4.3 不同CD浓度下藻细胞对CD的吸附特性    7
4.4 PH对吸附的影响    8
4.5 吸附动力学研究    8
5 结论    8
5.1 不同浓度高锰酸钾氧化后对CD的吸附    8
5.2不同CD浓度下藻细胞对CD的吸附特性    9
5.3 PH对吸附的影响    10
5.4 吸附动力学研究    10
6.讨论    11
致  谢    14