The phosphorus distribution of substrate in different area of both constructed wetland with plant and one without plant
1 Introduction The constructed wetlands are made up by aquatic plant, substrate and their associated microbial assemblages, with low-cost for treating municipal, industrial and agricultural wastewater. The removal mechanisms of phosphorus in wastewater are mostly by plant take up and retention of substrate. Comparatively, the latter has more proportion. Except for the surface adsorption of the particles, some chemical elements of these materials, such as iron (Fe), calcium (Ca) and aluminium (Al), could conduct precipitation reaction with soluble phosphate. Both of them mainly form substrate phosphorus retention capacity. But the organic substances biodegradation and oxygen from plant root in constructed wetland in using could lead to active migration and transformation of chemical elements on surface of the substrate, such as oxide iron, which could impact the retention of phosphorus. The objective of this study is to investigate spatial distribution of total phosphorous (TP) and different forms of inorganic phosphorous in substrate of both horizontal sub-surface flow constructed wetland with plant and one without plant after they treating wastewater five months.
X.Y. Cao Y. X. Chong GW. Yu
College of Resources and Environment, South China Agricultural University, Ministry of Agriculture Key Laboratory of Ecological Agriculture in Guangzhou, Guangzhou 510642
国际会议
北京
英文
111-112
2011-11-24（万方平台首次上网日期，不代表论文的发表时间）