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Pi Y.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Feng J.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Sun J.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control
Environmental Science and Pollution Research | Year: 2013

The degradation of sulfamonomethoxine (SMM) in the aqueous environment by the combination of UV illumination and Oxone has been studied. Experimental results indicated that the UV illumination can effectively activate Oxone to produce sulfate-free radicals (SO4 -•). When 10 mmol L-1 Oxone was added, 96.78 % removal of SMM (5 mg L-1) was achieved within 90 min. Mineralization of SMM was investigated by measuring the total organic carbon, which decreased by 89.01 % after 90 min reaction. Six intermediate compounds generated during the SMM degradation were identified with the aid of liquid chromatography and mass spectroscopy, combined with proton nuclear magnetic resonance spectroscopy. A general reaction pathway for the degradation of SMM was proposed, where the presence of SO4 -• remained crucial during the degradation process. © 2013 Springer-Verlag Berlin Heidelberg. Source


Feng J.-L.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Yu H.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Liu S.-H.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Liu M.-L.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Sun J.-H.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control
Huanjing Kexue/Environmental Science | Year: 2015

In order to investigate the distribution characteristics and ecological risk of HCHs and DDTs in the surface water of Xinxiang, 18 surface water samples were collected from from Xinxiang and the concentrations of HCHs and DDTs were determined. The ecological risk of HCHs and DDTs was evaluated using the overlapping areas of probability density function and safety threshold methods. The results showed that the levels of total HCHs (∑ HCHs) and total DDTs (∑ DDTs) in 18 samples detected by GC-ECD ranged from 1.28 ng·L-1 to 49.2 ng·L-1 and from 0.42 ng·L-1 to 12.3 ng·L-1, respectively. In comparison with those reported for other rivers around the world, the levels of HCHs and DDTs in surface water from Xinxiang ranked middle. The main cause for HCHs and DDTs residues in the studied area was usage of lindane and technical DDTs as revealed by the isomer ratios. The ecological risk evaluation was based on the exposure concentration and available chronic toxicity data of p, p'-DDT, γ-HCHs and DDD, and the overlapping areas of probability density function and safety threshold methods both showed that the ecological risk of these three OCPs to aquatic organism was in the order of DDD>γ-HCHs> p, p'-DDT. And the probability of exposure concentration exceeding the 10% value of the toxicity data for DDD, γ-HCHs and p, p'-DDT was 10.2%, 5.94%, 0.01%, respectively. ©, 2015, Huanjing Kexue/Environmental Science. All right reserved. Source


Yang Q.,Henan Normal University | Yang Q.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Wang J.,Henan Normal University | Wang J.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | And 12 more authors.
Bioresource Technology | Year: 2012

In this study, the dynamics of bacterial, fungal and archaeal populations in two-stage biological processes of a full-scale printing and dyeing wastewater treatment system were traced using cultivation and molecular biological techniques. The enumeration results indicated that bacteria were the dominant population in the system, in which the ratio of fungi to bacteria decreased in all the treatment units, while the ratio of archaea to bacteria increased significantly, especially in samples from the second-stage biological treatment process. PCR-denaturing gradient gel electrophoresis (DGGE) analysis showed that the microbial diversity increased with system running and 64.6% of bacterial, 57.6% of fungal and 38.2% of archaeal populations remained in the system from the seed sludge during system start-up. In spite of variation in the microbial community and composition of the influents, some bacterial species such as Thauera sp. and Xanthomonadaceae were present simultaneously in all the collected samples. © 2012 Elsevier Ltd. Source


Yang Q.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Zhang H.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Li X.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | Wang Z.,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control | And 5 more authors.
Bioresource Technology | Year: 2013

The abilities of yeasts to produce different extracellular enzymes and their distribution characteristics were studied in municipal, inosine fermentation, papermaking, antibiotic fermentation, and printing and dyeing wastewater treatment systems. The results indicated that of the 257 yeasts, 16, 14, 55, and 11 produced lipase, protease, manganese dependant peroxidase (MnP), and lignin peroxidase (LiP), respectively. They were distributed in 12 identified and four unidentified genera, in which Candida rugosa (AA-M17) and an unidentified Saccharomycetales (AA-Y5), Pseudozyma sp. (PH-M15), Candida sp. (MO-Y11), and Trichosporon montevideense (MO-M16) were shown to have the highest activity of lipase, protease, Mnp, and LiP, respectively. No yeast had amylase, cellulose, phytase, or laccase activity. Although only 60 isolates produced ligninolytic enzymes, 249 of the 257 yeasts could decolorize different dyes through the mechanism of biodegradation (222 isolates) or bio-sorption. The types of extracellular enzymes that the yeasts produced were significantly shaped by the types of wastewater treated. © 2012 Elsevier Ltd. Source

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