Ammonia volatilization, N(2)O and CO(2) emissions from landfill leachate-irrigated soils.

Effects of leachate addition on ammonia volatilization and N(2)O and CO(2) emissions from two different soils were investigated using the 10-day laboratory incubation method at two levels of moisture content. Ammonia volatilization was dominated by soil pH and only occurred in alkaline clay soil, where 0.26-0.

[N2O emissions and ammonia volatilization from leachate irrigated soils].

The effect of soil properties on N2O emissions and ammonia volatilization after leachate addition was investigated by soil S1 and S2 through incubation experiment. The conversions of soil NH4(+)-N and NO3(-)-N contents after leachate addition were evaluated as well. Soil pH dominantly determines the ammonia volatilization after leachate addition and ammonia volatilization only happens by soil S1 of alkaline nature within the first 5-day during the 10-day incubation.

[Effects of leachate-loading and irrigation depth on N2O and CO2 emissions from leachate-irrigated soil].

By using prefabricated probe and static chamber, the N2O concentration at different depths along the soil columns irrigated by landfill leachate as well as the N2O and CO2 fluxes were determined. The results showed that leachate irrigation could promote the N2O emission. Within the first 24 hours after irrigation, the N2O fluxes from the soil columns were significantly correlated with the N2O concentrations in the columns at the depths of 10 cm (r = 0.

[Effects of leachate irrigation and cover soil type on N2O emission from municipal solid waste landfill].

By the method of static chamber, the seasonal and diurnal variations of N2O fluxes in two full-scale municipal solid waste (MSW) landfills covered with sandy and clay soils were measured to study the effects of leachate irrigation and cover soil type on the landfill N2O emission. The results showed that the N2O flux in the MSW landfill covered with sandy soil was (242 +/- 576) microg N2O-N x m(-2) x h(-1) in summer, being 3.2 times (P > 0.

Minimisation of N2O emissions from a plant-soil system under landfill leachate irrigation.

The irrigation of a plant-soil system with landfill leachate should promote the formation of N2O due to the introduction of organic carbon and mineralized-N and the elevation of the moisture content. Laboratory incubation was performed to minimize N2O emissions from a leachate irrigated plant-soil system by manipulating leachate NH(4)(+)-N loading, moisture content, and soil type. A field investigation, consisting of three plots planted with Cynodon dactylon, Nerium indicum Mill, and Festuca arundinacea Schreb, was then conducted to select plant species.

N2O emissions from municipal solid waste landfills with selected infertile cover soils and leachate subsurface irrigation.

This study presents the field investigations into the effects of cover soils and leachate subsurface irrigation on N2O emissions from municipal solid waste landfills. Landfill Site A and Site B, covered with carefully chosen infertile soils, were selected to monitor their diurnal and seasonal variations of N2O emissions. The annual average N2O flux was 469 +/- 796 microg N2O-N m(-2) h(-1) in Site B with leachate subsurface irrigation, three times that of Site A without leachate irrigation.

[Modification of MSWI fly ash by using anionic chelating surfactant].

This paper aims at the reutilization and stabilization of municipal solid waste incineration (MSWI) fly ash to produce a high value added product. The effects of anionic chelating surfactants on the surface modification and fixing capacity of MSWI fly ash were primarily explored. Based on the indexes of active ratio and analysis of IR-spectrometer, the active ratio of ACS1 modified fly ash can be found higher than 95% under the condition of surfactant dosage at 7.