This page has only limited features, please log in for full access.

Unclaimed
DeQi Xiong
College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian 116026, China

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 18 May 2021 in Marine Pollution Bulletin
Reads 0
Downloads 0

Oil-sediment aggregation is an important transport and transformation process of spilled oil, which has been considered as a pathway of spill remediation. This work focused on the individual performance of dispersed oil and sediment during the aggregation process. Dispersion of three oils was first tested and validated in a water tank. An approach of estimating the mass variation of the sediment that has participated in forming the oil-sediment aggregates (OSAs) has been developed by density analysis. Results indicated that the density of the formed OSAs increases during the aggregation. In the context of remediation, it takes longer for sediment to reach equilibrium than for dispersed oil, especially under high mixing energy at a large sediment concentration, which results in the formation of dense OSAs, as well as high aggregation degree and rate. Roncador oil possesses a relatively high capability of capturing sediment to form dense OSAs, especially at an initial sediment concentration of over 150 mg/L. Oil sinking efficiency and the characteristic change rate of aggregated oil mass seem to be proportional to oil dispersion efficiency, and decrease with the mean size of dispersed oil droplets. The process of aggregation can further promote the dispersion of oil into water column. This study also provides fundamental data for the formation kinetics of OSAs.

ACS Style

Zhixin Qi; Ruiyang Sun; Yue Yu; DeQi Xiong; Wenxin Li; Xinping Yu; Sinan Fu. Performance of dispersed oil and suspended sediment during the oil-sediment aggregation process. Marine Pollution Bulletin 2021, 168, 112455 .

AMA Style

Zhixin Qi, Ruiyang Sun, Yue Yu, DeQi Xiong, Wenxin Li, Xinping Yu, Sinan Fu. Performance of dispersed oil and suspended sediment during the oil-sediment aggregation process. Marine Pollution Bulletin. 2021; 168 ():112455.

Chicago/Turabian Style

Zhixin Qi; Ruiyang Sun; Yue Yu; DeQi Xiong; Wenxin Li; Xinping Yu; Sinan Fu. 2021. "Performance of dispersed oil and suspended sediment during the oil-sediment aggregation process." Marine Pollution Bulletin 168, no. : 112455.

Journal article
Published: 19 January 2021 in International Journal of Environmental Research and Public Health
Reads 0
Downloads 0

Currently, global climate change and oil pollution are two main environmental concerns for sea cucumber (Apostichopus japonicus) aquaculture. However, no study has been conducted on the combined effects of elevated temperature and oil pollution on sea cucumber. Therefore, in the present study, we treated sea cucumber with elevated temperature (26 °C) alone, water-accommodated fractions (WAF) of Oman crude oil at an optimal temperature of 16 °C, and Oman crude oil WAF at an elevated temperature of 26 °C for 24 h. Results showed that reactive oxygen species (ROS) level and total antioxidant capacity in WAF at 26 °C treatment were higher than that in WAF at 16 °C treatment, as evidenced by 6.03- and 1.31-fold-higher values, respectively. Oxidative damage assessments manifested that WAF at 26 °C treatment caused much severer oxidative damage of the biomacromolecules (including DNA, proteins, and lipids) than 26 °C or WAF at 16 °C treatments did. Moreover, compared to 26 °C or WAF at 16 °C treatments, WAF at 26 °C treatment induced a significant increase in cellular apoptosis by detecting the caspase-3 activity. Our results revealed that co-exposure to elevated temperature and crude oil could simulate higher ROS levels and subsequently cause much severer oxidative damage and cellular apoptosis than crude oil alone on sea cucumber.

ACS Style

Xishan Li; Chengyan Wang; Nan Li; Yali Gao; Zhonglei Ju; Guoxiang Liao; DeQi Xiong. Combined Effects of Elevated Temperature and Crude Oil Pollution on Oxidative Stress and Apoptosis in Sea Cucumber (Apostichopus japonicus, Selenka). International Journal of Environmental Research and Public Health 2021, 18, 801 .

AMA Style

Xishan Li, Chengyan Wang, Nan Li, Yali Gao, Zhonglei Ju, Guoxiang Liao, DeQi Xiong. Combined Effects of Elevated Temperature and Crude Oil Pollution on Oxidative Stress and Apoptosis in Sea Cucumber (Apostichopus japonicus, Selenka). International Journal of Environmental Research and Public Health. 2021; 18 (2):801.

Chicago/Turabian Style

Xishan Li; Chengyan Wang; Nan Li; Yali Gao; Zhonglei Ju; Guoxiang Liao; DeQi Xiong. 2021. "Combined Effects of Elevated Temperature and Crude Oil Pollution on Oxidative Stress and Apoptosis in Sea Cucumber (Apostichopus japonicus, Selenka)." International Journal of Environmental Research and Public Health 18, no. 2: 801.

Journal article
Published: 09 January 2021 in International Journal of Environmental Research and Public Health
Reads 0
Downloads 0

The purpose of this study was to explore and compare the sex-specific differences in the toxic effects of water-accommodated fractions of 380# heavy fuel oil (HFO WAF) on the sea urchin Strongylocentrotus intermedius. Sea urchins were acutely exposed to HFO WAF at different nominal concentrations (0%, 10% and 20%) for seven days. The results showed that females had a higher polycyclic aromatic hydrocarbons (PAHs) bioaccumulation in gonad tissues and that both the total antioxidant capacity (TAC) and lipid peroxidation (LPO) levels in the gonad tissues of females were much higher than those of males. The PAHs bioaccumulation in gametes indicated that parents’ exposure could lead to a transfer of PAHs to their offspring, and eggs had higher TAC and LPO than sperms. After maternal and paternal exposure to HFO WAF, the frequency of morphological abnormalities of the offspring was increased when compared to the control. Overall, these results indicated that maternal exposure to HFO WAF could cause more significantly toxic effects on sea urchins than paternal exposure could, which could lead to more significantly negative effects on their offspring.

ACS Style

Xuanbo Wang; Hang Ren; Xishan Li; Huishu Chen; Zhonglei Ju; DeQi Xiong. Sex-Specific Differences in the Toxic Effects of Heavy Fuel Oil on Sea Urchin (Strongylocentrotus intermedius). International Journal of Environmental Research and Public Health 2021, 18, 499 .

AMA Style

Xuanbo Wang, Hang Ren, Xishan Li, Huishu Chen, Zhonglei Ju, DeQi Xiong. Sex-Specific Differences in the Toxic Effects of Heavy Fuel Oil on Sea Urchin (Strongylocentrotus intermedius). International Journal of Environmental Research and Public Health. 2021; 18 (2):499.

Chicago/Turabian Style

Xuanbo Wang; Hang Ren; Xishan Li; Huishu Chen; Zhonglei Ju; DeQi Xiong. 2021. "Sex-Specific Differences in the Toxic Effects of Heavy Fuel Oil on Sea Urchin (Strongylocentrotus intermedius)." International Journal of Environmental Research and Public Health 18, no. 2: 499.

Journal article
Published: 03 November 2020 in Journal of Environmental Management
Reads 0
Downloads 0

Suspended particulate matter (SPM) in marine environments plays an important role in determining the fate of spilled oil via the generation of oil-particle aggregates (OPAs). A series of mesoscale wave tank experiments and sedimentation tests were conducted to fill the knowledge gap on how the turbulent mixing, temperature, and oil type affect the dispersion of spilled oil and properties of OPAs. Generally, the oil dispersing efficiency was significantly enhanced by high wave energy, which also led to effective oil sinking, large size of OPAs and wide distribution of trapped oil. Nonlinear fitting results indicated that the oil sinking efficiency followed an exponential growth over time. The effect of temperature on oil dispersion and formation of OPAs is primarily attributed to its influence on oil viscosity and interfacial tension. Viscous oils are more likely to interact with particles above 25 °C. However, below 20 °C, a specific oil viscosity that will bring about the maximum OPAs exists. Excessive oil viscosity will lead to a weak binding between oil and SPM and a centralized distribution of trapped oil. Furthermore, spilled oil with a high asphaltene can interact more effectively with particles. Our finding suggested that early prevention of offshore oil sinking is key in summer.

ACS Style

Yue Yu; Zhixin Qi; DeQi Xiong; Ruiyang Sun; Sinan Fu; Wenxin Li. Oil dispersion and aggregation with suspended particles in a wave tank. Journal of Environmental Management 2020, 278, 111572 .

AMA Style

Yue Yu, Zhixin Qi, DeQi Xiong, Ruiyang Sun, Sinan Fu, Wenxin Li. Oil dispersion and aggregation with suspended particles in a wave tank. Journal of Environmental Management. 2020; 278 ():111572.

Chicago/Turabian Style

Yue Yu; Zhixin Qi; DeQi Xiong; Ruiyang Sun; Sinan Fu; Wenxin Li. 2020. "Oil dispersion and aggregation with suspended particles in a wave tank." Journal of Environmental Management 278, no. : 111572.

Journal article
Published: 22 July 2020 in Journal of Marine Science and Engineering
Reads 0
Downloads 0

Sea cucumber (Apostichopus japonicus) is mainly cultured in the coastal zone, where it is easily threatened by accidental oil spills. Chemical dispersant is one of the efficient oil spill responses for mitigating the overall environmental damage of oil spills. However, the impact of crude oil and chemical dispersants on sea cucumber is less well known. Hence, the present study focused on exploring the antioxidant response and oxidative stress in the respiratory tree of sea cucumber following exposure to GM-2 chemical dispersant (DISP), water-accommodated fractions (WAF), and chemically enhanced WAF (CEWAF) of Oman crude oil for 24 h. Results manifested that WAF exposure caused a significant increase in the reactive oxygen species (ROS) level (5.29 ± 0.30 AU·mgprot−1), and the effect was much more obvious in CEWAF treatment (5.73 ± 0.16 AU·mgprot−1). Total antioxidant capacity (T-AOC), as an important biomarker of the antioxidant defense capacity, showed an increasing trend following WAF exposure (0.95 ± 0.12 U·mgprot−1) while a significant reduction in T-AOC was observed following CEWAF exposure (0.23 ± 0.13 U·mgprot−1). Moreover, we also evaluated the oxidative damage of the macromolecules (DNA, protein, and lipid), and our results revealed that the presence of chemical dispersant enhanced oxidative damage caused by crude oil to sea cucumber.

ACS Style

Xishan Li; Guoxiang Liao; Zhonglei Ju; Chengyan Wang; Nan Li; DeQi Xiong; Yulu Zhang. Antioxidant Response and Oxidative Stress in the Respiratory Tree of Sea Cucumber (Apostichopus japonicus) Following Exposure to Crude Oil and Chemical Dispersant. Journal of Marine Science and Engineering 2020, 8, 547 .

AMA Style

Xishan Li, Guoxiang Liao, Zhonglei Ju, Chengyan Wang, Nan Li, DeQi Xiong, Yulu Zhang. Antioxidant Response and Oxidative Stress in the Respiratory Tree of Sea Cucumber (Apostichopus japonicus) Following Exposure to Crude Oil and Chemical Dispersant. Journal of Marine Science and Engineering. 2020; 8 (8):547.

Chicago/Turabian Style

Xishan Li; Guoxiang Liao; Zhonglei Ju; Chengyan Wang; Nan Li; DeQi Xiong; Yulu Zhang. 2020. "Antioxidant Response and Oxidative Stress in the Respiratory Tree of Sea Cucumber (Apostichopus japonicus) Following Exposure to Crude Oil and Chemical Dispersant." Journal of Marine Science and Engineering 8, no. 8: 547.

Journal article
Published: 20 February 2020 in Marine Pollution Bulletin
Reads 0
Downloads 0

After spill, the dispersed oil droplets may collide with suspended particulate matter in the water column to form oil-particle aggregates (OPAs) in turbulent environments. It may be an effective pathway to stabilize the oil by taking advantage of the particulate matter to clean up the contaminated waters. A theoretical model in Payne et al. (2003) is adopted to describe the oil-particle aggregation, and a solution method is proposed and validated against a group of experiments. The effect of the particle size and mass concentration on the aggregation has been examined quantitatively in detail. The particles and the oil droplets are consumed at a fixed ratio. Under the same mass concentration, smaller particles can trap more oil droplets, while larger particles tend to interact more quickly with the oil. The oil-particle aggregation rate and the oil trapping efficiency mainly depend on the particle concentration. The theoretical model is applied to predict the decrease of the dispersed oil in nearshore environments, based on the parameters obtained from the experiments. It is efficient to promote the oil-particle aggregation by increasing the particle concentration in the closed bay. In the open sea, the decrease of the dispersed oil can be effectively enhanced by increasing the particle concentration when it is below 0.50 kg/m3. The information presented in this paper can serve to predict the fate of the dispersed oil in coastal waters and provide technical support for oil spill management strategies.

ACS Style

Zhixin Qi; Yue Yu; Xinping Yu; Wenxin Li; Sinan Fu; DeQi Xiong. Effect of the concentration and size of suspended particulate matter on oil-particle aggregation. Marine Pollution Bulletin 2020, 153, 110957 .

AMA Style

Zhixin Qi, Yue Yu, Xinping Yu, Wenxin Li, Sinan Fu, DeQi Xiong. Effect of the concentration and size of suspended particulate matter on oil-particle aggregation. Marine Pollution Bulletin. 2020; 153 ():110957.

Chicago/Turabian Style

Zhixin Qi; Yue Yu; Xinping Yu; Wenxin Li; Sinan Fu; DeQi Xiong. 2020. "Effect of the concentration and size of suspended particulate matter on oil-particle aggregation." Marine Pollution Bulletin 153, no. : 110957.

Research article
Published: 01 January 2020 in Marine and Freshwater Research
Reads 0
Downloads 0

After oil spill accidents, weathered oil slicks can drift to coastal areas and interact with shoreline substrates. This process has been demonstrated to be the cause of the formation of stranded oil, which has attracted much attention. However, the refloating process of stranded oil when coastal hydrodynamic conditions change has been little investigated. This study evaluated the effects of current velocity, temperature and oil thickness on the refloating process of a simulated oil patty in a flow-through tank. The oil refloating efficiency (ORE) was used to quantitatively examine the degree of refloating. Non-linear fitting results indicated that the ORE increased gradually over time and then plateaued. Both observations and measurements indicated that higher current velocity brought about more oil refloat and enhanced the oil refloating rate. Furthermore, both the mass of refloating oil and the oil refloating rate showed a positive linear correlation with current velocity. The effects of temperature on the oil refloating process were determined by the effects of temperature on oil viscosity. In addition, the ORE at equilibrium increased linearly with increasing oil thickness. An empirical model was introduced and found to be closely consistent with the experimental data. This information is useful in predicting the fate and transport of stranded oil in the Bohai Sea.

ACS Style

Yue Yu; Zhixin Qi; Xinping Yu; Wenxin Li; Sinan Fu; DeQi Xiong. Current velocity, temperature and oil thickness as determinants of the refloating process of stranded oil in the Bohai Sea. Marine and Freshwater Research 2020, 71, 1006 .

AMA Style

Yue Yu, Zhixin Qi, Xinping Yu, Wenxin Li, Sinan Fu, DeQi Xiong. Current velocity, temperature and oil thickness as determinants of the refloating process of stranded oil in the Bohai Sea. Marine and Freshwater Research. 2020; 71 (8):1006.

Chicago/Turabian Style

Yue Yu; Zhixin Qi; Xinping Yu; Wenxin Li; Sinan Fu; DeQi Xiong. 2020. "Current velocity, temperature and oil thickness as determinants of the refloating process of stranded oil in the Bohai Sea." Marine and Freshwater Research 71, no. 8: 1006.

Journal article
Published: 01 November 2019 in Marine Pollution Bulletin
Reads 0
Downloads 0

Floating oil and sediments can interact to form oil-particle aggregates (OPAs) in marine environments. Laboratory batch experiments were conducted to investigate the effects of the concentration and size of sediment, temperature, oil types and chemical dispersant on the formation of OPAs. The results showed that the mass of OPAs and oil-particle aggregation rate are mainly related to the sediment concentration. Under the same mass concentration, more oil droplets can be trapped by smaller particles. Nevertheless, larger particles tend to interact more quickly with oil droplets. The effect of temperature on the formation of OPAs is substantially attributed to its influence on oil viscosity, and there is a threshold for oil viscosity which will bring about the maximum OPAs. Spilled oil with a high asphaltene can interact more effectively with the sediments. Appropriate addition of chemical dispersant is favorable for the formation of OPAs while excess addition will inhibit it.

ACS Style

Yue Yu; Zhixin Qi; Wenxin Li; Sinan Fu; Xinping Yu; DeQi Xiong. Effects of physical parameters and chemical dispersant on the formation of oil-particle aggregates (OPAs) in marine environments. Marine Pollution Bulletin 2019, 148, 66 -74.

AMA Style

Yue Yu, Zhixin Qi, Wenxin Li, Sinan Fu, Xinping Yu, DeQi Xiong. Effects of physical parameters and chemical dispersant on the formation of oil-particle aggregates (OPAs) in marine environments. Marine Pollution Bulletin. 2019; 148 ():66-74.

Chicago/Turabian Style

Yue Yu; Zhixin Qi; Wenxin Li; Sinan Fu; Xinping Yu; DeQi Xiong. 2019. "Effects of physical parameters and chemical dispersant on the formation of oil-particle aggregates (OPAs) in marine environments." Marine Pollution Bulletin 148, no. : 66-74.

Journal article
Published: 21 August 2019 in Journal of Marine Science and Engineering
Reads 0
Downloads 0

The formation of sunken oils is mainly dominated by the interaction between spilled oils and sediments. Due to their patchiness and invisibility, cleaning operations become difficult. As a result, sunken oils may cause long-term and significant damage to marine benthonic organisms. In the present study, a bench experiment was designed and conducted to investigate the quantitative distribution of polycyclic aromatic hydrocarbons (PAHs) in sunken oils in the presence of chemical dispersant and sediment. The oil sinking efficiency (OSE) of 16 priority total PAHs in the sediment phase was analyzed with different dosages of dispersant. The results showed that the synergistic effect of chemical dispersant and sediment promoted the formation of sunken oils, and the content of PAHs partitioned in the sunken oils increased with the increase of dispersant-to-oil ratios (DORs). Furthermore, with the addition of chemical dispersant, due to the solubility and hydrophobicity of individual PAHs, the high molecular weight (HMW) PAHs with 4–6 rings tended to partition to sediment compared with low molecular weight (LMW) PAHs with 2–3 rings. The synergistic effect of chemical dispersant and sediment could enhance the OSE of HMW PAHs in sunken oils, which might subsequently cause certain risks for marine benthonic organisms.

ACS Style

Yali Gao; DeQi Xiong; Zhixin Qi; Xishan Li; Zhonglei Ju; Xueqiang Zhuang; Gao; Qi; Li; Ju. Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment. Journal of Marine Science and Engineering 2019, 7, 282 .

AMA Style

Yali Gao, DeQi Xiong, Zhixin Qi, Xishan Li, Zhonglei Ju, Xueqiang Zhuang, Gao, Qi, Li, Ju. Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment. Journal of Marine Science and Engineering. 2019; 7 (9):282.

Chicago/Turabian Style

Yali Gao; DeQi Xiong; Zhixin Qi; Xishan Li; Zhonglei Ju; Xueqiang Zhuang; Gao; Qi; Li; Ju. 2019. "Distribution of Polycyclic Aromatic Hydrocarbons in Sunken Oils in the Presence of Chemical Dispersant and Sediment." Journal of Marine Science and Engineering 7, no. 9: 282.

Journal article
Published: 06 August 2019 in Journal of Marine Science and Engineering
Reads 0
Downloads 0

The floating oil can drift to the coastal areas and interact with the shoreline substrates after oil spill accidents. This process is demonstrated to be the cause of the formation of oil-contaminated sediments, which has attracted much attention. However, no systematic study has concerned the desorption process of oil from oil-contaminated sediments when the coastal hydrodynamic conditions change. This work determines the effects of wave conditions and particle size on the release of oil from artificially prepared sediments in a wave tank. Nonlinear fitting results show that the oil release kinetic curves can be correctly estimated with the Lagrangian first-order (LFO) first-order equation. Under different test conditions. The oil concentration in the water increases rapidly within 6 h. However, the oil desorption is inhibited thereafter and the process of sorption occurs dominantly. Under higher wave energy, the process of desorption is significantly enhanced and more large oil droplets release from sediments. Under the same wave condition, small oil droplets firstly release from the sediments. Besides, more oil especially with a larger size can release from larger sediment while oil releases more quickly from smaller sediment.

ACS Style

Yue Yu; Zhixin Qi; Sinan Fu; Xinping Yu; Wenxin Li; DeQi Xiong. Effects of Wave Conditions and Particle Size on the Release of Oil from Oil-Contaminated Sediments in a Wave Tank. Journal of Marine Science and Engineering 2019, 7, 256 .

AMA Style

Yue Yu, Zhixin Qi, Sinan Fu, Xinping Yu, Wenxin Li, DeQi Xiong. Effects of Wave Conditions and Particle Size on the Release of Oil from Oil-Contaminated Sediments in a Wave Tank. Journal of Marine Science and Engineering. 2019; 7 (8):256.

Chicago/Turabian Style

Yue Yu; Zhixin Qi; Sinan Fu; Xinping Yu; Wenxin Li; DeQi Xiong. 2019. "Effects of Wave Conditions and Particle Size on the Release of Oil from Oil-Contaminated Sediments in a Wave Tank." Journal of Marine Science and Engineering 7, no. 8: 256.

Journal article
Published: 14 May 2019 in Applied Sciences
Reads 0
Downloads 0

A pilot-scale six-compartment hybrid anaerobic baffled reactor (HABR) with effective volume of 18 m3 was used to treat dyeing wastewater. The HABR system was able to treat the wastewater efficiently after FeSO4 pretreatment, as indicated by removal efficiencies of 33.7% for chemical oxygen demand (COD), 39.9% for suspended solid (SS), and 22.5% for sulfate (SO42−) during steadily operational period. Gas chromatography–mass spectrometry (GC-MS) showed that the concentrations of alkanes, amides, organic acids, ketones, phenols, and esters were much lower in the effluent than those in the influent; many high-molecular-weight compounds such as cyclanes, quinolines, and phenols were successfully transformed to low-molecular-weight ones. As illustrated from the results of generalized grey relational analysis (GGRA), COD removal efficiency was more closely associated with flow rate, organic loading rate (OLR), water temperature, and influent SS among the whole selected possible factors. Based on the overall treating effectiveness and the GGRA study, the optimized operation strategy of the dyeing wastewater treatment by HABR was obtained as the hydraulic retention time (HRT) of 12 h for steady-state operation with an up-flow velocity of 1.7 m/h as well as OLR of 1.5–2.0 kg COD/(m3·d).

ACS Style

Zhixin Qi; Guoli Xiang; DeQi Xiong. Performance Evaluation of Pilot-scale Hybrid Anaerobic Baffled Reactor (HABR) to Process Dyeing Wastewater Based on Grey Relational Analysis. Applied Sciences 2019, 9, 1974 .

AMA Style

Zhixin Qi, Guoli Xiang, DeQi Xiong. Performance Evaluation of Pilot-scale Hybrid Anaerobic Baffled Reactor (HABR) to Process Dyeing Wastewater Based on Grey Relational Analysis. Applied Sciences. 2019; 9 (10):1974.

Chicago/Turabian Style

Zhixin Qi; Guoli Xiang; DeQi Xiong. 2019. "Performance Evaluation of Pilot-scale Hybrid Anaerobic Baffled Reactor (HABR) to Process Dyeing Wastewater Based on Grey Relational Analysis." Applied Sciences 9, no. 10: 1974.

Article
Published: 21 November 2018 in Acta Oceanologica Sinica
Reads 0
Downloads 0

This study aims to evaluate the subacute toxic effects of oil under different treatments on marine organism by simulating natural contaminative processes. In this study, 120# (RMD15) fuel oil was selected as the pollutant and marine medaka (Oryzias melastigma) embryos as the experimental organism. The developmental toxicity of different volume concentrations (0.05%, 0.2%, 1% and 5%) of water-accommodated fractions, biologicallyenhanced water-accommodated fractions, and chemically-enhanced water-accommodated fractions on the embryos in different exposure time (8, 15 and 22 d) were compared and the content of relevant polycyclic aromatic hydrocarbons (PAHs) was studied (in dispersion and in vivo). The subacute toxic effects were assessed in terms of antioxidant activities of enzymes (superoxide dismutase, catalase and glutathione S-transferase) and the blue sac disease (BSD) indexes.The results showed that the BSD indexes of the treatment groups were significantly higher than the respective control groups and showed positive correlations with both concentration and exposure time. The experiments with three antioxidant enzymes indicated that enzymatic activities of the embryos changed dramatically under the oxidation stress of petroleum hydrocarbons, especially after adding the dispersants. With the increase of petroleum hydrocarbon concentration and exposure time, the three enzymes showed different degrees of induction and inhibition effects.

ACS Style

Xiang Gao; Guanghui Ding; Xishan Li; DeQi Xiong. Comparison of toxicity effects of fuel oil treated by different dispersants on marine medaka (Oryzias melastigma) embryo. Acta Oceanologica Sinica 2018, 37, 123 -132.

AMA Style

Xiang Gao, Guanghui Ding, Xishan Li, DeQi Xiong. Comparison of toxicity effects of fuel oil treated by different dispersants on marine medaka (Oryzias melastigma) embryo. Acta Oceanologica Sinica. 2018; 37 (11):123-132.

Chicago/Turabian Style

Xiang Gao; Guanghui Ding; Xishan Li; DeQi Xiong. 2018. "Comparison of toxicity effects of fuel oil treated by different dispersants on marine medaka (Oryzias melastigma) embryo." Acta Oceanologica Sinica 37, no. 11: 123-132.

Journal article
Published: 01 September 2018 in Ecotoxicology and Environmental Safety
Reads 0
Downloads 0

The present study investigated the toxic effects of parental (maternal/paternal) exposure to heavy fuel oil (HFO) on the adult reproductive state, gamete quality and development of the offspring of the sea urchin Strongylocentrotus intermedius. Adult sea urchins were exposed to effluents from HFO-oiled gravel columns for 7 days to simulate an oil-contaminated gravel shore, and then gametes of adult sea urchins were used to produce embryos to determine developmental toxicity. For adult sea urchins, no significant difference in the somatic size and weight was found between the various oil loadings tested, while the gonad weight and gonad index were significantly decreased at higher oil loadings. The spawning ability of adults and fecundity of females significantly decreased. For gametes, no effect was observed on the egg size and fertilization success in any of the groups. However, a significant increase in the percentage of anomalies in the offspring was observed and then quantified by an integrative toxicity index (ITI) at 24 and 48 h post fertilization. The offspring from exposed parents showed higher ITI values with more malformed embryos. The results confirmed that parental exposure to HFO can cause adverse effects on the offspring and consequently affect the recruitment and population maintenance of sea urchins.

ACS Style

Meina Duan; DeQi Xiong; Mengye Yang; Yijun Xiong; Guanghui Ding. Parental exposure to heavy fuel oil induces developmental toxicity in offspring of the sea urchin Strongylocentrotus intermedius. Ecotoxicology and Environmental Safety 2018, 159, 109 -119.

AMA Style

Meina Duan, DeQi Xiong, Mengye Yang, Yijun Xiong, Guanghui Ding. Parental exposure to heavy fuel oil induces developmental toxicity in offspring of the sea urchin Strongylocentrotus intermedius. Ecotoxicology and Environmental Safety. 2018; 159 ():109-119.

Chicago/Turabian Style

Meina Duan; DeQi Xiong; Mengye Yang; Yijun Xiong; Guanghui Ding. 2018. "Parental exposure to heavy fuel oil induces developmental toxicity in offspring of the sea urchin Strongylocentrotus intermedius." Ecotoxicology and Environmental Safety 159, no. : 109-119.

Journal article
Published: 29 August 2018 in Environmental Science: Processes & Impacts
Reads 0
Downloads 0

Schematic description of the interaction between oil and sediments under increasing sediment particle concentration.

ACS Style

Yali Gao; Xue Zhao; Zhonglei Ju; Yue Yu; Zhixin Qi; DeQi Xiong. Effects of the suspended sediment concentration and oil type on the formation of sunken and suspended oils in the Bohai Sea. Environmental Science: Processes & Impacts 2018, 20, 1404 -1413.

AMA Style

Yali Gao, Xue Zhao, Zhonglei Ju, Yue Yu, Zhixin Qi, DeQi Xiong. Effects of the suspended sediment concentration and oil type on the formation of sunken and suspended oils in the Bohai Sea. Environmental Science: Processes & Impacts. 2018; 20 (10):1404-1413.

Chicago/Turabian Style

Yali Gao; Xue Zhao; Zhonglei Ju; Yue Yu; Zhixin Qi; DeQi Xiong. 2018. "Effects of the suspended sediment concentration and oil type on the formation of sunken and suspended oils in the Bohai Sea." Environmental Science: Processes & Impacts 20, no. 10: 1404-1413.

Journal article
Published: 15 August 2018 in Marine Policy
Reads 0
Downloads 0

When a ship in need of assistance has requested a place of refuge with regards to the maritime administration, deciding on the most suitable form of refuge is often both a political and technical problem. To avoid opposition by local communities, a decision model responding to such ship requests is generally established to enable the refuge designation on a case-by-case basis. Within this framework, a step-by-step ranking process is proposed, first selecting indices for potential candidate refuge sites according to the purpose of requesting refuge, with all indices then ordered by pairwise comparison. The weight of each index is determined according to the tone word used for adjacent comparison, and the suitability score for each candidate port obtained. The model is then applied to a hypothetical ship accident in the Bohai Sea in China, which further illustrates the envisaged response process and provides a solution to contemporary maritime administration.

ACS Style

Zhixin Qi; Chunchang Zhang; Junsong Han; Yali Gao; DeQi Xiong. A decision model responding to the refuge request from a ship in need of assistance. Marine Policy 2018, 95, 294 -300.

AMA Style

Zhixin Qi, Chunchang Zhang, Junsong Han, Yali Gao, DeQi Xiong. A decision model responding to the refuge request from a ship in need of assistance. Marine Policy. 2018; 95 ():294-300.

Chicago/Turabian Style

Zhixin Qi; Chunchang Zhang; Junsong Han; Yali Gao; DeQi Xiong. 2018. "A decision model responding to the refuge request from a ship in need of assistance." Marine Policy 95, no. : 294-300.

Journal article
Published: 01 June 2015 in Chemosphere
Reads 0
Downloads 0

Perfluorooctane sulfonate (PFOS) is an ubiquitous persistent organic pollutant, which can be bioaccumulated and cause adverse effects on organisms. However, there is very limited information about the toxic effects of PFOS to marine organisms and its mechanisms. Therefore, in the present study, adult sea urchins Glyptocidaris crenularis were exposed to PFOS for 21 d, followed by a 7-d depuration period, in order to investigate the toxicity of PFOS to sea urchin and its potential epigenetic mechanisms. Sea urchins dropped spines, and lowered down the motor ability and feeding ability after the PFOS exposure. Superoxide dismutase activities in supernatant of coelomic fluid of sea urchin increased firstly and then dropped down, while the change of the catalase activity took an opposite trend during the exposure period. They both approached to the corresponding activity of the control after the depuration period. The DNA methylation polymorphism, methylation rate and demethylation rate in sea urchin gonad all increased following the prolonged exposure time, and then decreased after the depuration period. The demethylation rates were lower than the corresponding methylation rates, therefore methylation events were dominant during the whole experimental period. This might suggest that sea urchin have strong self-protection mechanisms and can survive from the PFOS exposure presented in this study. Further efforts are needed to more precisely investigate the DNA methylation effects of PFOS and the self-protection mechanism of sea urchin.

ACS Style

Guanghui Ding; Luyan Wang; Jing Zhang; Yuanyuan Wei; Lie Wei; Yang Li; Mihua Shao; DeQi Xiong. Toxicity and DNA methylation changes induced by perfluorooctane sulfonate (PFOS) in sea urchin Glyptocidaris crenularis. Chemosphere 2015, 128, 225 -230.

AMA Style

Guanghui Ding, Luyan Wang, Jing Zhang, Yuanyuan Wei, Lie Wei, Yang Li, Mihua Shao, DeQi Xiong. Toxicity and DNA methylation changes induced by perfluorooctane sulfonate (PFOS) in sea urchin Glyptocidaris crenularis. Chemosphere. 2015; 128 ():225-230.

Chicago/Turabian Style

Guanghui Ding; Luyan Wang; Jing Zhang; Yuanyuan Wei; Lie Wei; Yang Li; Mihua Shao; DeQi Xiong. 2015. "Toxicity and DNA methylation changes induced by perfluorooctane sulfonate (PFOS) in sea urchin Glyptocidaris crenularis." Chemosphere 128, no. : 225-230.

Journal article
Published: 01 March 2015 in Aquatic Procedia
Reads 0
Downloads 0
ACS Style

DeQi Xiong; Meina Duan; Xiang Gao; Bailin Yang; Guanghui Ding. Effects of Chemically Dispersed Oil on DNA Damage of Sea Urchin. Aquatic Procedia 2015, 3, 209 -215.

AMA Style

DeQi Xiong, Meina Duan, Xiang Gao, Bailin Yang, Guanghui Ding. Effects of Chemically Dispersed Oil on DNA Damage of Sea Urchin. Aquatic Procedia. 2015; 3 ():209-215.

Chicago/Turabian Style

DeQi Xiong; Meina Duan; Xiang Gao; Bailin Yang; Guanghui Ding. 2015. "Effects of Chemically Dispersed Oil on DNA Damage of Sea Urchin." Aquatic Procedia 3, no. : 209-215.

Conference abstract
Published: 31 October 2008 in Journal of Biotechnology
Reads 0
Downloads 0
ACS Style

DeQi Xiong; Furong Lv. Response of antioxidase in body fluid and tissues of sea urchin Hemicentrotus pulcherrimus to water-accommodated fractions of no. 0 diesel oil. Journal of Biotechnology 2008, 136, S191 -S192.

AMA Style

DeQi Xiong, Furong Lv. Response of antioxidase in body fluid and tissues of sea urchin Hemicentrotus pulcherrimus to water-accommodated fractions of no. 0 diesel oil. Journal of Biotechnology. 2008; 136 ():S191-S192.

Chicago/Turabian Style

DeQi Xiong; Furong Lv. 2008. "Response of antioxidase in body fluid and tissues of sea urchin Hemicentrotus pulcherrimus to water-accommodated fractions of no. 0 diesel oil." Journal of Biotechnology 136, no. : S191-S192.