Zhang Hong; Jiang JinYuan; Zhou YueXi; Chen XueMin
Author Affiliation :
Department of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
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Research of Environmental Sciences
Adsorption and photodegradation of N, N-dimethylacetamide (DMAC) on suspended sediment particles in water and their influence were studied experimentally. The results demonstrate that DMAC adsorption on sediment particles is in accordance with both the Langmuir and Freundlich models. The photolytic half-life of DMAC in water is longer than 8 h under different UV illumination intensities. Photodegradation of DMAC in water increases with increasing UV illumination intensity. The photodegradation rate of DMAC is higher with higher initial mass concentration under the same UV illumination intensity in the lower mass concentration range (<20 mg/L). The DMAC photodegradation rate increases with the increase of pH in natural pH conditions of 6-9, and decreases remarkably with coexistence of humic acid in water.
Record Number :
China Environmental Science
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Indexing terms for this abstract:
acetamide, adsorption, humic acids, illumination, particles, pH, photolysis, pollutants, sediment, sorption isotherms, suspended solids, water pollution
hydrogen ion concentration, photodegradation, photolytic degradation, potential of hydrogen