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Coal mining-induced surface subsidence causes many environmental problems and geological hazards, including damage to buildings, depletion of water resources, and land desertification. However, numerous coal resources in China are buried under buildings. To solve these problems, a solid waste backfill mining (SWBM) technique has been proposed to control the surface subsidence under buildings. This...
Experimental and theoretical studies have been conducted to investigate the adsorption of atrazine in aqueous solutions by sheep manure-derived biochar synthesized at 650°C (SMB650). The results of characterization analysis showed that SMB650 possessed large specific surface area and was rich in pore structure and functional groups. The removal efficiency of atrazine by SMB650 was 95.3% under the...
With the implementation of ecological projects such as the Grain-for-Green Project, rocky desertification control and comprehensive control of soil and water loss for sloping farmland, ecological environment of karst mountainous areas in southwest China has been improved significantly, but soil and water loss of sloping farmland is still an important ecological and environmental problem in this region...
In recent years, environmental pollution caused by excessive exploitation and utilization of the Earth’s fossil fuels, extreme exploitation of land resources, and excessive emissions of carbon dioxide (CO2) has caused people to think about how to reduce CO2 emissions and capture the existing CO2 in the atmosphere. The reduction of CO2 emissions can be summarized into two aspects. Firstly, people could...
Phytoremediation is a promising, low-cost and environmentally friendly technology. By simulating different concentrations of Pb, Pb+Zn and Pb+EDTA in aqueous solutions, taking Acorus calamus, Eichhornia crassipes and Iris tectorum as experimental material, hydroponics was used to study the enrichment of aquatic plants to Pb in water under different conditions. The results show that Eichhornia crassipes...
The degradation of atrazine (ATZ) by ultraviolet/peroxymonosulfate (UV/PMS) under different conditions was investigated in phosphate buffer, and the degradation mechanism and kinetics were discussed. The results showed that the degradation rate of 2.5 μmol/L ATZ in UV/PMS system was 97.63% in 20 min when the reaction temperature was 20ºC, the concentration of PMS was 20 μmol/L and the UV intensity...
As a waste of the fish processing industry, scales cause the disposal of large amounts of solid waste into the environment. How to turn such waste into a useful product is an important issue. In this study, acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC) were extracted from silver carp (Hypophthalmichthys molitrix) scales using a new acid-enzyme combined method. The results showed that...
Our study aimed to assess the pollution levels and ecological risk of potentially toxic elements (PTEs): Pb, Cd, Cu, Cr, Zn, Ni, and As in the urban forest soil of Nanjing, China. A total of 180 topsoil (0~20cm) samples were collected with the aid of GPS according to 1 × 1 km grid cells in six different function zones: road green belt (RGB), urban square (US), urban garden (UG), institution greenland...
Chromophoric dissolved organic matter (CDOM) is a valuable optically active substance. This study examined the seasonal characteristics of fluorescent CDOM components in the Yinma and Songhua rivers, highly polluted watershed tributaries of the Songhua River, and a drinking water source for the city of Changchun, China. Parallel factor analysis (PARAFAC) and excitation-emission matrix (EEM) spectra...
Atrazine is a widely used herbicide, and because of its potential to seriously pollute soil and water resources, has attracted widespread attention. In this study, the bacterial strain LY-1 was isolated and identified as the species Arthrobacter. At present, there are many different atrazine-degrading bacteria that have been screened out, including Arthrobacter sp., Pseudomonas sp., and Shewanella...
The value of agro-ecosystem services is closely related to crop yield. As a production input component in an agro-ecosystem, agro-ecosystem services have practical value. It is generally believed that agro-ecosystem services are substitutes for purchase investment and can decrease agricultural production costs. Crop yield increases may negatively affect agro-ecosystem protection, and conversely, agro-ecosystem...
Understanding the response of soil respiration to changes in temperature and moisture is critical to accurately assess the impact of afforestation on regional carbon balance. In order to investigate the response of soil respiration to soil temperature and moisture, we partitioned soil respiration into three components (heterotrophic respiration, root respiration, and rhizomicrobial respiration) using...
Although the treatment for recycling chrome in tanning effluents is relatively mature, the post-tanning processes have no corresponding effective technology due to the lack of knowledge about the effluents. In this work we investigated the composition and properties of rewetting and neutralizing effluents in posttanning processes. Goat skins were tanned with sulfate chrome liquor of alkalinity 33%...
In order to assess the spatial distribution and the potential pollution risk of nickel (Ni) and vanadium (V) in Shuangtaizi Estuary in China, the water and the surface sediments were collected to determine V and Ni content in specified sites. The data indicated that the estuary was contaminated by Ni, while V content was low. Total concentrations of V in river water ranged from 0.212 to 0.374 μg/L,...
Rapid and extensive economic development in China has resulted in a dramatic increase in the consumption of energy and resources with negative ecological effects. This study sought to define the concept of social-ecological systems (SES) resilience to determine whether a given system can effectively withstand these adverse effects per its quantitative level of resilience. The information entropy method...
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