Effects of microplastics and photovoltaics on greenhouse gas generation and emission in ponds
Ponds are a significant source of greenhouse gas emissions.However,the effects of human activities such as the presence of photovoltaic panels on water surfaces and microplastics on greenhouse gas emission in ponds remain unclear.In this study,a dual-factor laboratory experiment was designed to investigate the mechanisms behind the impact of shading and the addition of polyethylene(PE)microplastics on greenhouse gas generation and emission in ponds.The results showed that microplastics had no significant effect on CO2 production in ponds,because the PE was difficult for microorganisms to degrade.On the other hand,shading treatment promoted CO2 production,with the highest average concentration of 101.39 μmol/L in the shaded group.The addition of microplastics facilitated N2O production,which increased over time.The average N2O concentration in the microplastic group was 57.76 nmol/L,while it was 39.65 nmol/L in the control group.The shading treatment initially suppressed N2O production but later promoted it.Microplastics had minimal influence on CH4 concentration,whereas shading treatment had a significant impact.Overall,the gradual accumulation of non-degradable microplastics in ponds intensifies N2O emissions,while the shading effect of photovoltaics on water surfaces increases CO2 and N2O emission.However,both factors have a minimal negative impact on CH4 emission.
万方数据
维普
