Publications by authors named "Huai-dong Zhou"
Article Synopsis
- Researchers collected and analyzed water and sediment samples from urban rivers and lakes in Beijing to assess the presence of ten pharmaceuticals and personal care products (PPCPs).
- High-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS) was used to measure the concentrations and detection ratios of PPCPs in the samples, revealing caffeine as the most common pollutant.
- Although the overall risk from these pollutants in water was deemed not high, various rivers showed significantly different levels of PPCP contamination, with Yongyin River having the highest concentrations.
Sixty-eight fish samples were collected from typical epidemic areas of schistosomiasis prevalence. The contents of 12 CB congeners in fish samples were measured using GC/MS technique. The results indicated that 1,3-DIC, 1,4-DIC, 1,2-DIC and HCB were the most predominant CB congeners in the samples from the studying area.
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- Fourteen sediment samples were collected from 15 river estuaries and six drinking water resources around Taihu Lake to measure the presence of nine pharmaceutical and personal care products (PPCPs) using HPLC-MS/MS.
- The data revealed that caffeine dominated pollutants near river estuaries, while lincomycin and other veterinary drugs were prevalent near drinking water sources, with certain areas showing higher concentrations of these pollutants.
- Risk assessments indicated that while most PPCPs posed low risk, acetaminophen, azithromycin, and sulfamethoxazole represented a high risk in the sediments, suggesting ongoing contamination from municipal sewage and farming practices.
[Determination of Platinum Group Elements in City Roadside Dusts by ICP-MS ].
Guang Pu Xue Yu Guang Pu Fen Xi
April 2016
Platinum group elements (PGEs) can be naturally found only at very low concentration in the earth crust. However, the increasing usage of PGEs in vehicle exhaust catalysts, and some other applications cause their anthropogenic emission and spread in the environment. Currently，the accumulation of PGEs in the environment has increased over the time.
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- Researchers collected 11 mollusca and 32 fish samples from areas with high schistosomiasis prevalence to measure levels of 12 CB congeners using GC/MS technique.
- The most common CB congeners found were 1,3-DIC, 1,4-DIC, 1,2-DIC, and HCB, with mollusca showing a geometric average of 11,947 ng/g lipid weight and fish between 1,851 to 8,159 ng/g lipid weight.
- Catfish had the highest CB concentrations while crucian carp had the lowest; cancer risk estimates for local residents consuming these organisms were within acceptable limits.
[Application of ICP-mS in the health risk assessment of heavy metals for drinking water sources in reservoirs].
Guang Pu Xue Yu Guang Pu Fen Xi
May 2014
The six heavy metal concentrations (Cr, Cr, As, Cd, Cu, Zn and Pb) in water samples collected from five reservoirs of Liao River Basin were studied. The health risk assessment for heavy metals pollution in reservoirs was conducted based on the environmental health risk assessment model recommended by U. S.
View Article and Find Full Text PDF[Application of ICP-MS in assessing the pollution of seldom monitored trace elements in city roadside dusts].
Guang Pu Xue Yu Guang Pu Fen Xi
December 2013
Seldom monitored trace element concentrations in road dusts colleted from Shihezi City were studied. A total of 32 sampling stations were selected. The concentration of 10 seldom monitored trace elements (B, Be, Bi, Co, Ga, Li, Sb, Sn, T1, V) were determined.
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- Heavy metals have accumulated in sediment in the Three Gorges Reservoir, prompting an investigation into their concentrations in fish from a tributary.
- Sixteen fish species were collected, and while most heavy metal levels were low, significant variations were found among different fish species.
- The study revealed a dependent increase of mercury (Hg) concentrations with higher trophic levels, indicating biomagnification, although it was less than in previous studies, and small fish exhibited higher heavy metal levels, signaling potential environmental risks.
Article Synopsis
- Pentachlorophenol (PCP) is often found in aquatic environments and is known to disrupt endocrine functions in fish, specifically in zebrafish used for this study.
- The research focused on how varying levels of PCP exposure affected thyroid hormone levels and gene expression in the brain and liver of zebrafish over 70 days.
- Results showed that high PCP concentrations led to changes in plasma thyroid hormones and gene expression related to thyroid function, resulting in developmental abnormalities and increased malformation rates in the offspring.
Article Synopsis
- A study collected 28 surface sediment samples from the Three Gorges Reservoir of the Yangtze River to measure the levels of polybrominated diphenyl ethers (PBDEs) using GC-MS technology.
- The findings revealed low concentrations of total PBDEs and BDE209 in the sediments, with the highest levels found in samples from Long River.
- A strong correlation between total PBDEs and BDE209 suggests they may originate from the same pollution source, but overall contamination levels were comparable to those in remote lakes, indicating minimal risk to aquatic life.
[Characterization of the different organic matter from soils and sediments].
Guang Pu Xue Yu Guang Pu Fen Xi
May 2013
The humic acid (HA) and nonhydrolyzable carbons (NHC) were isolated from three river sediment samples (1, 2, 3) from the rivers in the Tongzhou district of Beijing and four soil samples(4, 5, 6, and 7) from the surface soils in the vicinity area of Tianjin near Bohai Bay, respectively. The isolated HA and NHC fractions were also characterized using elementary analysis, X-ray photoelectron spectroscopy (XPS), solid state 13C cross-polarization and magic angle spinning nuclear magnetic resonance spectroscopy (13C NMR), and Fourier transformed infrared spectroscopy (FTIR). The results showed that NHC had lower H/ C and O/C atomic ratios than HA from the same source.
View Article and Find Full Text PDF[Determination of nitrate and nitrite in water samples using gallery automatic discrete analyzer].
Guang Pu Xue Yu Guang Pu Fen Xi
February 2013
Thermo Scientific Gallery Automatic Discrete Analyzer is special for water analyzing, and can automatically run steps includeing sample and reagents dispensing, water blank, mixing and incubation, Colorimetric reading and data processing. This method refers to U.S.
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- A study analyzed 47 surface water samples from the main stream and 22 tributaries of the Three Gorges Reservoir for 15 phenolic compounds using gas chromatography-mass spectrometry (GC/MS).
- Results revealed that the average concentrations of phenolic compounds were higher in tributaries (87.99 ng x L(-1)) than in the main stream (52.47 ng x L(-1)), with non-chlorinated phenols dominating the samples.
- Key compounds included phenol and o-cresol, which constituted 79.1% and 3.7% of the main stream samples, while phenol, o-cresol, and 2,6-dichlorophenol made up 77
Eighty-one surface water samples were collected from 3 tributaries of the Yangtze River in different periods. Contents of 28 PCB congeners in surface water samples were measured using Varian CP3800/300 GC-MS/MS technique. PCB8, 18, and 28 are the most predominant PCB congeners in the samples from tributaries.
View Article and Find Full Text PDFA geochemical study of Beijiang River sediments was carried out to analyze the concentrations, distribution, accumulation and potential sources of the seldom monitored trace elements (SMTEs: Sc, V, Co, Ga, Y, Sn and Sb). The mean concentrations of Sc, V, Co, Ga, Y, Sn and Sb were 8.2, 60.
View Article and Find Full Text PDFViolent disturbance are occurring in Haihe River basin due to a large number of human activities. To investigate the PBDEs pollution status and their distribution character, 48 surface sediment samples (at the top 0-5 cm layer) were collected from 14 principal tributaries in Haihe River basin. The contents of 27 PBDEs congeners in sediments were measured using Varian CP3800/300 GC-MS/ MS technique.
View Article and Find Full Text PDFIn order to survey platinum group elements (PGEs) contamination in central urban area of Beijing, dust samples were collected from the second ring road in December 2009. The road samples were digested with aqua regia and separated and purified with cation exchange resin, and the resulting solutions were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the concentrations of Pd, Pt and Rh in road dust ranged from 17.
View Article and Find Full Text PDFThis paper assesses the potential of NanoChem zeolite for ammonia removal from synthetic solution and actual landfill leachate. The data from experiments in batch study were applied to Langmuir isotherm. The saturated amount of NH4(+) -N adsorbed per unit weight of NanoChem zeolite was about 364 mg x g(-1), which yield significantly 3-30 times higher ammonium adsorption capacity than nature zeolite and Microporous molecular sieves.
View Article and Find Full Text PDFObjective: To summarize and analyze the clinical indication, surgical techniques and results of percutaneous antegrade Kirschner pinning in the treatment of proximal fracture of humerus.
Methods: Thirty-two patients with displaced fractures of the proximal humerus were treated with 2 to 3 Kirschner wires by percutaneous antegrade transfixation. Among 32 casas, there were 7 male and 25 female, with a mean age of 49.