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The Beijing-Tianjin-Hebei Region (BTH) as a national strategic highland attracts attention with its haze problem. In particular, Hebei is a major emitter of carbon emissions in BTH. The establishment of the Xiong’an New District in Hebei, known as the “Millennium plan,” faces complex and diverse development in the future, so the carbon emission prediction and influence mechanism are of great significance...
The objective of this study was to evaluate nutrient loss under herbaceous cover in simulated field conditions and quantify the influences of the aerial and underground parts of plants in preventing nutrient loss. The experimental settings were as follows: two herbs, i.e., alfalfa (Medicago sativa L.) and green foxtail (Setariaviridis (L.) Beauv.); four covers for each herb (0, 20-30%, 50-60%, and...
Unreasonable exploitation of groundwater resources in the Kongque River region has led to a decline in the groundwater table, groundwater salinization, and other geo-environmental problems. Therefore, this study supplements the studies on soil water and salt transport in the Kongque River region, and provides a new method for the prevention of groundwater salinization in arid and semiarid regions...
An experiment was carried out to compare cadmium and copper absorption and mineral nutrition accumulation in pennisetum and tall fescue in order to select an appropriate grass to remediate Cd/Cu-contaminated soil and explore their detoxification mechanisms of contamination by mineral elements. The biomass remained constant in tall fescue under each Cd addition level and increased in pennisetum until...
This paper attempts to give a microeconomic explanation of the environmental Kuznets curve (EKC) hypothesis according to marginal cost and marginal revenue. The interpretation about the shape and inflection point of EKC is based on the comparison between marginal cost and marginal revenue. The emissions of carbon dioxide (CO₂), nitrous oxide (N₂O) and methane are used as the environmental indicators...
This paper studies organic matter (OM) and nitrogen (N) distributions at different depths of an earthworm packing bed, and the N distribution in situ solution in artificial soil (AS). The contents of OM, nitrate nitrogen (NO₃-N), ammonia nitrogen (NH₃-N), and total nitrogen (TN) changed along with the depth of AS. The results of N concentration in situ solution indicated that 35 cm to 40 cm thickness...
A laboratory experiment was conducted in soil columns to study the moisture and salt redistribution through soil profile after the application of saline ice melt-water (SIMW) and flue gas desulfurization gypsum (FGDG) in a saline-sodic soil. The study consisted of SIMW (3200 ml frozen saline groundwater) and four SIMW+FGDG treatments which were SIMW+25%GR (7.9 mg·cm-2, gypsum require (GR) in the surface...
Heavy metal (HM) pollution in aquatic environments is of worldwide concern because of the toxicities of HMs in animals and humans. Constructed wetlands (CWs) have successfully been used as cost-effective natural systems to remove various contaminants. However, the effects of CW on the survival of animals have not been studied in any depth. We established a CW to remove HMs from water in Baiyin City,...
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