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Immobilized sulfate-reducing bacteria (SRB) in polyvinyl alcohol (PVA)-sodium alginate matrix were applied as biosorbents to remove cadmium (Cd) from aqueous solutions. Multiple characterization techniques including scanning electron microscope (SEM)-energy dispersive spectrometer (EDS), and Fourier transform infrared (FT-IR) spectra indicate that immobilized beads provided a suitable microenvironment...
As scattered elements, thallium (Tl) contamination poses a significant threat to human health due its high toxicity. Sulfate-reducing bacteria (SRB) embedded in PVA-sodium alginate matrix was utilized as a novel bio-remover to remove Tl from aqueous solution. The effect of pH, temperature, and initial Tl concentration on removal capacity of immobilized beads were studied and discussed in this work...
We investigated the biosorption characteristics of thallium (I) ions using dead biomass of Pseudomonas fluorescens strains as biosorbents. The biosorbents were characterized by Fourier transform infrared spectroscopy (FT-IR) and a scanning electron microscope (SEM). The effects of different environmental factors such as initial Tl concentration, initial solution pH, biomass dosage, and contact time...
Although the Qinghai-Tibetan Plateau (QTP) has experienced striking warming during the past century, information on how soil carbon (C) and nitrogen (N) pools of the alpine regions on the QTP respond to long-term warming is scarce. The aims of this study were to assess the response of soil organic C (SOC), total N (TN), labile C and N – including microbial biomass C (MBC) and N (MBN), inorganic N...
Nansi Lake, a typical shallow and macrophyte-dominated lake in south Shandong Province, China, has a total surface area of 1,266 km2 and is the largest and most important freshwater reservoir in northern China for the eastern route of the South-North Water Diversion (SNWD) project, in which the water in Yangtze River will be transported more than 1,100 km from Yangzhou to Tianjin and Beijing. A water-level...
Collapse is very common in tunnel construction, which can bring immense casualties and economic losses. The interface of soft and hard rock is the typical location for a tunnel collapse. During Shimenya Tunnel construction, collapse of the section ZK123+370~ZK123+365 of the left tunnel occurred. This paper discusses how distribution of layered rock, attitude of the stratum, hydrogeololgy, and advanced...
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