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Surface soil samples from 12 sampling sites around coal gangue piles of Baodian coal mine area in Shandong Province, China were collected and analyzed. The results showed that the average concentrations of Cu, Cd, Pb and Zn in soil of Baodian coal mine area were up to 30.91, 1.97, 37.78 and 101.81 mg/kg, respectively, which are much higher than their natural background values of Shandong province...
In resent years, various types of iron-based materials have been used as sorbents to remove heavy metals from wastewater. It is reported that the adsorption capacities of heavy metals on different kinds of iron oxides are quite high. However, researchers have not done much work on the Cr (VI) adsorption onto β-FeOOH. This study aims to investigate the removal of Cr (VI) with β-FeOOH, including the...
The objective of this study was to evaluate the spatial distribution, pollution extent and sources of heavy metal in Nansi Lake. Twenty six surface sediments were selected for determination of the total metal content. High concentrations of heavy metals including Cu, Cd, Pb, Zn, Cr, Fe and Mn, ranged from 3.15 to 230000 mg/kg-dry weight (dw). Clustering analysis was used to classify the monitoring...
The cationic polymer/bentonite nanocomposite adsorption materials were prepared by cationic polymer-epicholorohydrin-dimethylamine (EPI-DMA) and dimethyldlammonium (PDMDAAC) as intercalary reagents, respectively; then the adsorption performance for p-chlorophenol (p-CP) were discussed. The results indicated that the adsorption ability of cationic polymer/bentonites for p-CP increased with the increase...
An up-flow anaerobic sludge beds (UASB) reactor was fed with fishmeal industry wastewaters at different salinity levels in order to assess the effects on anaerobic granular sludge properties. When the wastewaters sodium concentration varied from 0.52 to 7.6 g/L, no activity inhibitions were observed according to the analysis of granular sludge performance. At sodium concentrations over 9.0 g/L the...
A combined system consisting of an up-flow anaerobic sludge blanket (UASB) and anoxic/aerobic bioreactor was introduced to treat a mature landfill leachate with a high ammonia concentration and low ratio of COD/TN. After 160 days of stable operation, the results indicated that organic matters were mainly removed by the UASB, while the ammonia was removed by shortcut nitrification in the anoxic/aerobic...
The dynamic membrane formation mechanisms and filtration mechanisms were investigated at 4 cm and 8 cm water head drop (WHD). Flux variation, resistance plot curve shape, the relationship t/V - t and t/V - V were investigated to study the dynamic membrane formation and filtration. And effluent turbidity and particles size distribution were also used to demonstrate the effluent particles size. Based...
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