Effect of compost aging on zinc adsorption characteristics

被引：11

作者：

Al-Mashaqbeh, Othman A. ^{[1
]}

McLaughlan, Robert G. ^{[2
]}

机构：

[1] Royal Sci Soc, Ctr Sci Res, Amman 11941, Jordan

[2] Univ Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2014年 / 2卷 / 01期

关键词：

Compost; Aging; Leaching; Zinc; Adsorption characteristics; Biofiltration;

D O I：

10.1016/j.jece.2014.01.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

One approach to improving the performance of biofiltration based treatment systems is to amend filtration media with compost to improve metal sorption. The effect of aging these amended compost particles on zinc sorption is investigated using batch and column tests. Batch tests showed that aged compost had a lower rate of zinc sorption but a similar zinc sorption capacity compared with fresh compost. Pseudo-second-order kinetics was found to best fit the batch experimental data. The intraparticle diffusion plot shows that there are differences due to the effect of aging of compost and that intra-particle diffusion is the dominant rate controlling mechanism. Column studies show that aging the compost decreased the sorption capacity by 22% (from 16 mg g(-1) to 13 mg g(-1)). It is evident that aging compost media have an effect on the magnitude and kinetics of zinc adsorption. This was also evidenced in the decreased CEC and peak intensities of relevant spectra in the FTIR of the aged compost. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：392 / 397

页数：6

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