Phosphorus sorption and chemical characteristics of lightweight aggregates (LWA) - Potential filter media in treatment wetlands

被引：136

作者：

Zhu, T

Jenssen, PD

Maehlum, T

Krogstad, T

机构：

[1] AGR UNIV NORWAY,DEPT ENGN,N-1432 AS,NORWAY

[2] AGR UNIV NORWAY,DEPT SOIL & WATER SCI,N-1432 AS,NORWAY

来源：

WATER SCIENCE AND TECHNOLOGY | 1997年 / 35卷 / 05期

关键词：

batch experiments; constructed wetland (CW); filter media; lightweight aggregates (LWA); phosphorus sorption;

D O I：

10.1016/S0273-1223(97)00058-9

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Five light-weight aggregates (LWAs), suitable for filter media in subsurface flow constructed wetlands, were tested for potential removal of phosphorus (P). P-sorption variation is dependent on the chemical characteristics of the LWA. All LWAs exhibited high pH and high total metal content; however, P-sorption capacity varied by two orders of magnitude. Of the LWAs' chemical characteristics (total metal content, cation exchange capacity, and oxalate soluble Fe and Al), total metal content has the closest relationship with the P-sorption capacity. Among the four major metal ions (Mg, Ca, Fe and Al), Ca has the strongest correlation with the P-sorption capacity. (C) 1997 IAWQ.

引用

页码：103 / 108

页数：6

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