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Plant hormones are trace organic molecules that play important roles in plant growth, development and stress resistance. 24-epibrassinolide (Br24) and strigolactones (Gr24) were reported to alleviate the toxicity of heavy metals and restrict their translocation into plants. In this study, the effects of Br24 and Gr24 with or without iron plaque (IP) induction on the uptake and accumulation of cadmium...
Changes in the ecosystem structure and ecosystem service value of the Fuping basin of the Daqing River from 1985 to 2015, as ascertained through remote sensing and a value assessment model, respectively, showed that forest land had contributed the most to the total ecosystem service value, followed by cultivated land and grassland. The ecosystem structure had changed markedly, the area under different...
It is important to manage water resources of the upper Yellow River basin for the new Silk Road economic belt. In recent decades, under the combined human activities and influence of climate, the hydrologic regime of the upper Yellow River basin shows remarkable variations that have caused many issues. So potential human indicated influence has been drawing increasing attention from hydrologists and...
Thallium (Tl) is a typical trace metal of extreme high toxicity. As a concomitant element, Tl is widely found in various sulfide minerals and K-containing rock minerals. The outburst of Tl pollution in drinking water sources of the northern branch of the Pearl River in China as reported in 2010 has greatly aroused public concerns about Tl pollution in China. Apart from typical sources of Tl pollution...
This study compounds three types of coagulants (AlCl₃, FeCl₃, Fe₂(SO₄)₃) with promising effects on TP removal of domestic sewage. The optimum conditions for TP removal using¹ compounded coagulants are determined by Plackett-Burman (P-B) design, steepest ascent, and Box-Behnken design. The adequacy of the quadratic regression model is evaluated by analysis of variance (ANOVA). Results show that initial...
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...
This work investigated the distribution, partitioning, and ecological risks of 16 polycyclic aromatic hydrocarbons (PAHs) in water and sediment of the Yinma River Basin in China in normal, wet, and dry seasons. Sixteen PAHs were analyzed in 17 paired sets of water and sediment samples collected from the study area. The concentrations of PAHs in water and sediment showed spatial-temporal variations,...
We quantitatively evaluated the future energy consumption of offi ce buildings for cooling and heating in Harbin, Tianjin, Shanghai, and Guangzhou, which represented different building climate zones in China. The results show that office buildings in different building climate zones have a decreasing trend of heating load and an increasing trend of cooling load. For the change of heating load, the...
A dynamic habitat and population model has been developed and applied to the tailwater below Glen Canyon Dam to estimate the dam operation’s effects on rainbow trout (Oncorhynchus mykiss) habitat and population dynamics. Water depth, flow temperature, flow velocity, and substrate types were used as the suitability parameters and to evaluate these indicators. Historic hydraulic data from 1991 to 2009...
The system of dynamic leaching was designed for samples of a coal gasification residual from a coalto-methanol plant in northwestern China in order to investigate the leaching behavior of four potentially hazardous elements – Hg, Cr, As, and Pb – in the coal gasification residual and investigate the impacts of the leaching time, size of the samples, and pH of the leaching solution on the leaching...
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...
Contaminated soil collected from an agricultural field was used to compare Cd enrichment among 20 soybean cultivars to explore their application foregrounds in safe production. The results showed that Cd concentration in beans of 20 soybean cultivars was from 0.23 mg kg⁻¹ to 2.33 mg kg⁻¹ when Cd concentration in soil was 1.98 mg kg⁻¹. Cd enrichment factors of 19 cultivars were lower than 1. Cd translocation...
This study aims to investigate the effects of oxytetracycline on growth and photosynthetic capacity of rape (Brassica campestris L.). Four levels of oxytetracycline (0, 10, 100, and 200 mg kg⁻¹) were added to the potted soil. Chlorophyll fluorescence parameters induced by five levels (90, 190, 420, 820, and 1,500 μmol photons m⁻² s⁻¹) of PAR (PAR, photosynthetically active radiation) were measured...
Identifying microbial yield and the pathway relating to nitrous oxide (N₂O) production in nitrification were essential prerequisites for modeling N₂O production and emissions. A thermodynamic method based on standard Gibbs free energy change of bio-chemical reaction was used to evaluate the NH₃-NO, NH₃-NO₂⁻ , NH₄⁺-NO, NH₄⁺-NO₂⁻ , NH₂OH-NO, and NH₂OH-NO₂⁻ reactions. Meanwhile, the stoichiometric equations...
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...
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