Wang J.,Shenyang Academy of Environmental science |
Zhang X.,Tsinghua University |
Li G.,Tsinghua University
Ozone: Science and Engineering | Year: 2013
Ozonation is an effective method to remove recalcitrant weathered oil in contaminated soil. The purpose of this study was to characterize the compositional changes of hydrocarbons in residual oil during ozonation. A bioremediated soil containing residual oil was ozonated for up to 15 h. A total of 102 compounds in the residual oil were analyzed by GC/MS and 36 diagnostic ratios (DRs) were calculated based on quantitative or semi-quantitative results in order to evaluate the susceptibility of the residual oil compositions to ozonation and the effects of ozonation on the fingerprint profile of the residual oil. The total ozonation removal rates were in the following order: triaromatic steranes (TAS) > steranes, polycyclic aromatic hydrocarbons, terpanes > alkanes. Ozone kept the fingerprints of n-alkanes, C27- to C34-terpanes, steranes and TAS, separately. Branched alkanes (i.e., pristane and phytane) showed a higher removal rate than n-alkanes. Ozone reactivity of PAHs depended on the number of rings, presence of heteroatoms and level of alkylation. Four- to six-ring PAHs and PAHs with a high level of alkylation showed higher reactivity, while dibenzothiophene and alkylated dibenzothiophenes were found to be resistant to ozonation. Some of the biomarker source ratios remained stable and could still be used for source identification even after some of the biomarkers were removed by >90% by ozonation. © 2013 Copyright 2013 International Ozone Association.
PubMed | CAS Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of science, University of Technology, Sydney and Shenyang Academy of Environmental Science
Type: | Journal: Ecotoxicology and environmental safety | Year: 2015
The aims of this study were: (1) the study of cadmium (Cd) accumulation and toxicity in different castor cultivars (Ricinus communis L.); (2) to investigate changes in antioxidant enzymatic activities and the subcellular distribution of Cd in young and old leaves from two different castor cultivars, after exposure to two different Cd concentrations, and explore the underlying mechanism of Cd detoxification focusing on antioxidant enzymes and subcellular compartmentalization. The Cd concentration, toxicity, and subcellular distribution, as well as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) activities were measured in Zibo-3 and Zibo-9 cultivars after exposure to two different concentrations of Cd (2mg/L and 5mg/L) for 10 days. This research revealed Cd accumulation characteristics in castor are root>stem>young leaf>old leaf. Castor tolerance was Cd dose exposure and the cultivars themselves dependent. Investigation of subcellular Cd partitioning showed that Cd accumulated mainly in the heat stable protein (HSP) and cellular debris fractions, followed by the Cd rich granule (MRG), heat denatured protein (HDP), and organelle fractions. With increasing Cd concentration in nutrient solution, the decreased detoxified fractions (BDM) and the increased Cd-sensitive fractions (MSF) in young leaves may indicate the increased Cd toxicity in castor cultivars. The BDM-Cd fractions or MSF-Cd in old leaves may be linked with Cd tolerance of different cultivars of castor. The antioxidant enzymes that govern Cd detoxification were not found to be active in leaves. Taken together, these results indicate Cd tolerance and toxicity in castor can be explained by subcellular partitioning.
Huang J.-D.,Liaoning University |
Qiu J.,Fourth Affiliated Hospital of China Medical University |
Li D.-H.,Shenyang Academy of Environmental science
Environment, Energy and Sustainable Development - Proceedings of the 2013 International Conference on Frontier of Energy and Environment Engineering, ICFEEE 2013 | Year: 2014
This study focused on the technical measures of revegetation on Boron mud heap in Dandong, China. Adopting field test method, revegetation trial was conducted on the waste Boron mud heap. By composting the urban sludge + river mud + straw inside planting pit to ameliorate Boron mud matrix, transplanting nutrition cup bush seedlings and sowing herbage seed on the composting pit to establish bush-herbage clump, these technical measures can solve the major constraints to plant growth and establish survival bush-herbage vegetation at lowcost. The results show that pit layered composting is the cost-effective measure to improve Boron mud planting matrix; Planting bush-herbage clump is a good pattern to resist the extreme Boron mud heap environment. Hippophae rhamnoides Linn., Caragana Korshinskii Kom., Pennisetum alopecuroides (L.) Spreng. and Medicago sativa Linn.are good pioneer species for revegetation on the Boron mud heap. Experiment proved that the combination of these technical measures can reconstruct vegetation, this revegetation pattern is worthy of reference for similar mine ecological restoration. © 2014 Taylor & Francis Group, London.
PubMed | North University of China, Shenyang University and Shenyang Academy of Environmental science
Type: Meta-Ana. | Journal: The Journal of clinical psychiatry | Year: 2016
Epidemiologists have explored the relationship between maternal postnatal depression (PND) and the intelligence quotient (IQ) of the resulting offspring, but the results remain inconclusive. This study aims to analyze the literature regarding the association between maternal PND and a childs IQ.A search of articles in PubMed, Web of Science, and MEDLINE databases from inception to September 2015 was conducted and supplemented by a manual search of relevant reference lists. The following search terms were used: (postpartum OR postnatal OR puerperal) AND (depression OR depressive symptoms OR blues OR dysthymia OR disorders OR psychosis) AND (intelligence quotient OR IQ OR intelligence tests OR intelligence OR cognitive OR cognition) AND (children OR child OR adolescent OR offspring) AND (cohort OR prospective OR follow-up OR follow OR longitudinal).Articles exploring the association between maternal PND and IQ of offspring aged 2 years and older were included. A total of 510 records were retrieved.Two authors independently selected eligible studies and extracted data. Three authors assessed the quality of the studies. To explore the associations between maternal PND and full IQ and verbal IQ, random-effects meta-analyses were performed, followed by subgroup analysis of impact on full IQ.Nine articles were eligible for review. On the basis of the Newcastle-Ottawa Scale, 7 studies were considered to be of high quality. When one study of participants aged 3.8 years was excluded from the meta-analysis, the pooled weighted mean difference of full IQ between the children of PND mothers and non-PND mothers was -4.086 (95% CI, -6.578 to -1.594), and the pooled standard mean difference of verbal IQ between the children of PND mothers and non-PND mothers was -0.361 (95% CI, -0.564 to -0.158). Subgroup analysis showed that the childs age at evaluation, diagnostic method of PND, study quality, and socioeconomic status did not affect the mean difference in full IQ between children of PND mothers and those of non-PND mothers. When the excluded study was included in the meta-analysis, the results did not vary.Maternal PND may be a risk factor for a childs lower IQ. More studies of high methodological quality may be needed.
PubMed | CAS Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of science and Shenyang Academy of Environmental science
Type: | Journal: Ecotoxicology and environmental safety | Year: 2016
We studied chelate effects on castor bean (Ricinus communis L.) growth. These effects included Cd and Pb accumulation in plant tissues and the chemical behavior of Cd and Pb in the plant rhizosphere and non-rhizosphere. Tests were conducted in a glasshouse using the rhizobag method. Two castor bean cultivars (Zibo-3 and Zibo-9) were grown in soil contaminated with 3.53mg/kg Cd and 274mg/kg Pb. The soil was treated with citric acid (CA), ethylenediamine disuccinic acid (EDDS) or ethylenediamine tetraacetic acid (EDTA) (5mmol/kg). EDDS-treated soil produced 28.8% and 59.4% greater biomass for Zibo-3 and Zibo-9 respectively. In contrast, CA and EDTA inhibited the growth of the two cultivars. Zibo-9 had greater tolerance than Zibo-3 to chelate toxicity. Based on Cd and Pb plant uptake, EDDS could substitute for EDTA for phytoremediation of Cd in soil. EDTA was the most effective of the three chelates for Pb phytoremediation but it is less suitable for field use due to toxicology environmental persistence. Acid extractable Cd and Pb in the rhizosphere or reducible Cd and Pb in the non-rhizosphere of soil were the main influences on Cd and Pb accumulation in castor bean.
PubMed | CAS Beijing Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of science, Beijing Union University and Shenyang Academy of Environmental Science
Type: | Journal: Scientific reports | Year: 2016
Cadmium (Cd) isotopes provide new insights into Cd uptake, transport and storage mechanisms in plants. Therefore, the present study adopted the Cd-tolerant Ricinus communis and Cd-hyperaccumulator Solanum nigrum, which were cultured under controlled conditions in a nutrient solution with variable Cd supply, to test the isotopic fractionation of Cd during plant uptake. The Cd isotope compositions of nutrient solutions and organs of the plants were measured by multiple collector inductively coupled plasma mass spectrometry (MC-ICPMS). The mass balance of Cd isotope yields isotope fractionations between plant and Cd source ((114/110)Cdorgans-solution) of -0.70 to -0.22 in Ricinus communis and -0.51 to -0.33 in Solanum nigrum. Moreover, Cd isotope fractionation during Cd transport from stem to leaf differs between the Cd-tolerant and -hyperaccumulator species. Based on these results, the processes (diffusion, adsorption, uptake or complexation), which may induce Cd isotope fractionation in plants, have been discussed. Overall, the present study indicates potential applications of Cd isotopes for investigating plant physiology.
PubMed | CAS Research Center for Eco Environmental Sciences and Shenyang Academy of Environmental Science
Type: | Journal: Environmental science and pollution research international | Year: 2015
Huang J.-D.,Liaoning University |
Li D.-H.,Shenyang Academy of Environmental science
Advanced Materials Research | Year: 2012
This study focused on the technical measures of revegetation on ferrum tailings bank in Huludao, China. Adopting field test method, a revegetation trial was conducted on the Yangjiazhangzi waste ferrum tailings bank. By composting the urban sludge + river mud + straw inside planting pit to ameliorate tailings matrix, planting perennial herb to establish closed type sand barrier to shelter bush-herbage growth, transplanting nutrition cup bush seedlings and sowing herbage seed on the composting pit to establish bush-herbage clump, these technical measures can solve the major constraints to plant growth and establish survival bush-herbage vegetation at lowcost. The results show that Pit layered composting is the cost-effective measure to improve ferrum tailings planting matrix; Planting perennial herb sand barrier t is a good measure to improve microhabitat; Planting bush-herbage clump is a good pattern to resist the extreme ferrum tailing environment; Hippophae rhamnoides Linn., Caragana Korshinskii Kom., Medicago sativa Linn.and Astragalus adsurgens Pall are good pioneer species for revegetation on the ferrum tailings bank. Experiment proved that the combination of these technical measures can reconstruct vegetation, this revegetation pattern is worthy of reference for similar mine ecological restoration.
PubMed | Liaoning University and Shenyang Academy of Environmental science
Type: Journal Article | Journal: Bulletin of environmental contamination and toxicology | Year: 2015
This study evaluated the level of PAH pollution in typical contaminated coking sites in Shenyang. Sixty surface soil samples were collected from an area of 1.310(5)m(2) polluted by PAHs. The concentrations, sources and possible health risks of 16 PAHs in the area were analyzed. The average content of 16 PAHs was 6.110(3) mg/kg. In oral intake, benzo(a)pyrene (BaP) presented the largest exposure risk (hazard quotient HQ=1.1710(-5)), followed by dibenz(a,h)anthracene (DbA) (HQ=1.1410(-5)). The non-carcinogenic hazard indices and carcinogenic risks of the PAHs were arranged in the order of BaP>DbA>benzo(b)fluoranthene (BbF)>benz(a)anthracene (BaA)>indeno(1,2,3-cd)pyrene (InP)>benzo(k)fluoranthene (BkF)>chrysene (Chr). Bap and DbA were the principal pollution sources, followed by BbF, BaA, InP, BkF and Nap successively. Oral intake was the main route of PAH entry into the human body.
PubMed | North University of China and Shenyang Academy of Environmental science
Type: Journal Article | Journal: International journal of environmental research and public health | Year: 2015
This study aimed to examine the parental physical illness effect on behavioral problems among adolescents, and the effects of being an only child, family cohesion, and family conflict on behavioral problems among adolescents with physically ill parents in Liaoning province, China.This cross-sectional study was performed in 2009. A questionnaire including two dimensions of the Family Environment Scale (family cohesion and family conflict), self-reported Strength and Difficulties Questionnaire (SDQ), and demographic factors was distributed to the subjects.Among the 5220 adolescents, 308 adolescents lived with physically ill parents. The adolescents with physically ill parents had more behavioral problems than adolescents with healthy parents. Among the girls who lived in families with physically ill parents, the SDQ score and the prevalence of SDQ syndromes were higher in the girls with siblings than the girls without siblings after adjusting for variables; the effect of family cohesion on SDQ was significant after adjusting for variables.Interventions targeting family cohesion may be effective to reduce behavioral problems of adolescents with physically ill parents.