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Articles by Yonglong Lu
Total Records ( 4 ) for Yonglong Lu
  Chunli Chen , Yonglong Lu , Xiang Zhang , Jing Geng , Tieyu Wang , Yajuan Shi , Wenyou Hu and Jing Li
  The current state of concentrations of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in China is presented. While products that are known to degrade to either PFOS or PFOA have been used in China, concentrations in environmental media have been reported to be relatively low across China. Greater concentrations of PFOS and PFOA were observed in southern and eastern China than in other areas of China. Concentrations of PFOS and PFOA were relatively great in the Huangpu River, with concentrations of 20.5 ng l-1 and 1590 ng l-1, respectively. Surface waters of Dongguan and Shanghai were more contaminated by PFOS and PFOA than that of other cities. Dongguan was the only city in China in which PFOS value in surface water exceeded the water quality criterion, while PFOA concentration in Shanghai was 152 ng l-1. Similar to other contaminants, point-source pollution was also the common pattern of PFOS and PFOA contamination. Concentrations of PFOS in human blood in China were relatively greater in China than other countries, with drinking water contamination given as the most likely source. Concentrations of PFOS in human blood have increased from the 1980s to the 2000s, while such a trend was not observed for PFOA.
  Xiang Zhang , Yonglong Lu , Yajuan Shi , Chunli Chen , Zhi Yang , Yedan Li and Yan Feng
  The effects of cadmium and the polycyclic aromatic hydrocarbon (PAH) pyrene on the earthworm Eisenia fetida were investigated in contact and soil tests. Metabolic (glutathione-S-transferase, GST) and oxidative (catalase, CAT) stress enzymes were studied as biomarkers in earthworms after 48 hours, 14 days and 28 days. Contact test indicated that cadmium had significant effects on survival and enzyme activities while pyrene influenced neither in the studied concentrations. Induction of CAT and GST in earthworms exposed to cadmium and pyrene in the acute soil test (14 d) revealed the metabolism of these chemicals resulting in the production of reactive oxygen species. After a relatively long period of exposure (28 d), earthworms exposed to pyrene failed to handle the high toxicity and were physiologically damaged, while those exposed to cadmium adapted to the disturbed environment through effective metabolism of the chemical and management of the oxidative stress.
  Jing Li , Yonglong Lu , Wentao Jiao , Tieyu Wang , Wei Luo and John P. Giesy
  Tianjin Bin Hai New Area (BHNA) is the third largest economic zone in China. This is an older industrial area that has been developing rapidly but with many historic sources of contamination. The concentrations of 16 individual polycyclic aromatic hydrocarbons (PAHs) listed for priority control by the US EPA were quantified in 105 surface soil samples by the use of gas chromatography mass spectrometry (GC/MS). Multivariate statistical methods were used to characterise the mixtures and make comparisons in the patterns among areas. Concentrations varied among areas, ranging from moderate to relatively high. The coefficients of determination between concentrations of individual PAHs and total concentration of PAH (∑ PAH) increased with the number of rings. The first three factors from the principal component analysis (PCA) explained 81.6% of the total variation, while ten higher molecular weight (HMW) PAHs` loadings for factor 1 accounted for 51.0%. Based on the patterns of relative loading proportions of individual PAHs calculated by PCA, the primary sources were coal combustion, traffic emissions including gasoline, diesel oil, and the burning of natural gas. The spatial distribution of concentrations of fluorene had a poor spatial autocorrelation in the study area. The sites with the greatest potential risk due to exposure to PAHs were mainly distributed around the chemical industry parks.
  Wenyou Hu , Tieyu Wang , Jong Seong Khim , Wei Luo , Wentao Jiao , Yonglong Lu , Jonathan E Naile and John P. Giesy
  A systematic survey of organochlorine pesticides (OCPs) including hexachlorocyclohexane isomers (α-HCH, β-HCH, γ-HCH, δ-HCH and ΣHCH) and dichlorodiphenyltrichloroethane metabolites (p,p'-DDT, p,p'-DDE, o,p'-DDT, p,p'-DDD and ∑DDT) in soils along the north coastal areas of the Bohai Sea, China, has been lacking. In this study, 31 representative surface soil samples were collected along the north coastal and riverine areas of the Bohai Sea to characterise the potential for adverse effects of ∑HCH, ∑DDT and their individual isomers and transformation products. Concentrations of ΣHCH and ΣDDT in soils ranged from less than the limit of detection (<LOD) to 3.0 x 101 ng · g-1 dw (mean: 3.5 ng · g-1 dw) and<LOD to 2.6 x 102 ng · g-1 dw (mean: 1.7 x 101 ng · g-1 dw), respectively. Compared with studies of OCPs in soils from other locations, concentrations of HCHs and DDTs observed in this study were moderate. Concentrations of OCPs observed in soils were generally less than proposed reference values. HCH residues were a mixture of historical technical HCH and current lindane sources. The pattern of DDTs was consistent with historical releases of technical DDTs. Selected soil physicochemical properties did not explain the sorption and/or partitioning of HCHs or DDTs.
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