| Abstrakt: |
The aim of the study was to make known of the adsorption property of several materials which would be the component of a type of green sorption media blends having advantages in cost, availability, permeability, environmental benefit, and strong removal efficiency to the nutrient from surface runoff. The media blends were suitable for the substrate in the retention ponds, bio-swales, rainwater garden, river side pond, and helpful to control the non-pointed nutrient pollution in the surface runoff. The sand-loam, sawdust, tire crumb, limestone, and ceramic sand were selected to study the adsorption property of ammonia, nitrates, total phosphorus (TP) in the static adsorption test. Langmuir and Freundlich isotherm were used to fit the adsorption property. The experimental results showed that it was the combined action of physical and chemical adsorption to the removal of ammonia, nitrate, TP by the five kinds of adsorption materials. The adsorption property to the ammonia of the five materials were sand-loam>sawdust>ceramic sand>limestone>tire crumb, to the nitrate were sand-loam>tire crumb>sawdust>ceramic sand>limestone, to the TP were tire crumb>sand-loam>ceramic sand> limestone>sawdust. The sand-loam and sawdust were the prior materials to remove nitrogen, while the tire crumb had the great advantages to remove phosphorus. |
