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Affiliation of Author(s):

环境与市政工程学院

Journal:

Advaced Materials Research

Key Words:

中文关键字：the type of zeolite; eliminating nitrogen load; ac，英文关键字：the type of zeolite; eliminating nitrogen load; ac

Abstract:

The application of an active zeolite barrier was investigated to improvement of eutrophication in the ancient Canal. For this, four types of zeolites (diameter: 1～2 mm) were applied in order to investage effect of the type of zeolite on N removal. The dosage of the zeolites was 1.46 kg.m-2 and the ammonium concentrations in overlying water were 3.47 mg/L. It is found that the capacity of elimination total N of the four zeolites was significant and decreased with the following order: Haiyu zeolite F1 > Aolin zeolite F2 > Natural zeolite F3 > Calcium zeolite F4. In addition, the results show that zeolite F1 and F2 belong to N inhibiting type as TN concentration of overlying water quickly reduced to 2.53 mg/L, 3.7 mg/L, and the corresponding removal efficiency of TN is as high as 56% and 35.6% after covering zeolite F1 and F2. The results indicated that the consumption rates of ammonia nitrogen in this system is greater than or equal to release rates of ammonia from sediment. However, TN concentration of overlying water still rise to high level (1.57 times of initial TN) when covering zeolite F3 and F4 (N non-inhibited type). Therefore, it is considered that the Haiyu zeolite should be the best barrier materials to clean sediment of the ancient Canal.

Note:

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Co-author:

刘爱萍,康俊琛,董玉华

First Author:

wangsen,huangtinglin,xujinlan

Indexed by:

Journal paper

Volume:

卷：

Issue:

期：374-377

Page Number:

页：1141-1146

Translation or Not:

no

Date of Publication:

2012-01-01