Environmental Fate of the Herbicide MCPA in Two Soils as Affected by the Presence of Wheat Ash
| 详细信息 | 推荐本文 | |
- 作者：Edgar Hiller ; Mikul谩拧 Barta木 ; J谩n Mili膷ka and Slavom铆r 膶er艌ansk媒
- 关键词：Degradation ; Desorption ; MCPA ; Soil ; Sorption ; Wheat ash
- 刊名：Water ; Air ; and Soil Pollution
- 出版时间：February, 2009
- 出版年：2009
- 期刊代码：78_00496979
- 类别：law
- 卷：197
- 期：1-4
- 页码：395-402
- 数据来源：sp
摘要
This study was conducted to evaluate the environmental fate processes of the herbicide (4-chloro-2-methylphenoxy)acetic acid (MCPA) in agricultural soils in the presence and absence of ash originating from the burning of wheat residue. The ash-amended soils (1%ash by weight) were approximately 8–16 times more effective than the ash-free soils in sorbing MCPA. The desorption results showed that 40–78%of initially sorbed MCPA were desorbed in both soils, depending on the initial MCPA concentration in solution. Addition of ash to soils decreased the desorption of MCPA by approximately 20%. Degradation of MCPA was substantially reduced in the presence of the ash. A 6-week incubation resulted in 50–85%of MCPA microbially degraded in ash-amended soils, as compared to >85–100%in ash-free soils under the same conditions.