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Yang J.,Hebei Provincial Academy of Environmental science
Continental Shelf Research | Year: 2010

The concentrations and sea-to-air fluxes of dissolved methane (CH4) were investigated in the North Yellow Sea during August 2006, January, April and October 2007. Dissolved CH4 concentrations showed obvious seasonal variation, with maximum values occurring in summer and lowest values occurring in winter. The saturations of dissolved CH4 in surface waters ranged from 78.7% to 1679.7% with an average of 252.4%. The estimated atmospheric CH4 fluxes using the Liss and Merlivat (LM86), and Wanninkhof formulae (W92) were (4.2±4.7), (11.6±10.3), (8.5±12.7) and (0.2±1.0), and (6.9±7.3), (14.6±22.3), (13.8±14.3) and (0.4±1.7) μmol·(m2 d)-1, respectively, for spring, summer, autumn and winter. Based on the average annual atmospheric CH4 flux and the area of the North Yellow Sea, the annual CH4 emission was estimated to be (2.4×10-2-4.2×10-2) Tg a-1, which suggests that the North Yellow Sea was a net source of atmospheric CH4. © 2009 Elsevier Ltd. All rights reserved.


Tan W.,Chinese Research Academy of Environmental Sciences | Zhang Y.,Hebei Provincial Academy of Environmental science | Zhang Y.,Wuhan University | He X.,Chinese Research Academy of Environmental Sciences | And 10 more authors.
Scientific Reports | Year: 2016

The use of wastewater irrigation for food crops can lead to presence of bioavailable phthalic acid esters (PAEs) in soils, which increase the potential for human exposure and adverse carcinogenic and non-cancer health effects. This study presents the first investigation of the occurrence and distribution of PAEs in a maize-wheat double-cropping system in a wastewater-irrigated area in the North China Plain. PAE levels in maize and wheat were found to be mainly attributed to PAE stores in soil coarse (250-2000 μm) and fine sand (53-250 μm) fractions. Soil particle-size fractions with higher bioavailability (i.e., coarse and fine sands) showed greater influence on PAE congener bioconcentration factors compared to PAE molecular structures for both maize and wheat tissues. More PAEs were allocated to maize and wheat grains with increased soil PAE storages from wastewater irrigation. Additional findings showed that levels of both non-cancer and carcinogenic risk for PAE congeners in wheat were higher than those in maize, suggesting that wheat food security should be prioritized. In conclusion, increased soil PAE concentrations specifically in maize and wheat grains indicate that wastewater irrigation can pose a contamination threat to food resources.


PubMed | Hebei Provincial Academy of Environmental science, Wuhan University, Chinese Research Academy of Environmental Sciences, Northeastern University and China Agricultural University
Type: | Journal: Scientific reports | Year: 2016

The use of wastewater irrigation for food crops can lead to presence of bioavailable phthalic acid esters (PAEs) in soils, which increase the potential for human exposure and adverse carcinogenic and non-cancer health effects. This study presents the first investigation of the occurrence and distribution of PAEs in a maize-wheat double-cropping system in a wastewater-irrigated area in the North China Plain. PAE levels in maize and wheat were found to be mainly attributed to PAE stores in soil coarse (250-2000m) and fine sand (53-250m) fractions. Soil particle-size fractions with higher bioavailability (i.e., coarse and fine sands) showed greater influence on PAE congener bioconcentration factors compared to PAE molecular structures for both maize and wheat tissues. More PAEs were allocated to maize and wheat grains with increased soil PAE storages from wastewater irrigation. Additional findings showed that levels of both non-cancer and carcinogenic risk for PAE congeners in wheat were higher than those in maize, suggesting that wheat food security should be prioritized. In conclusion, increased soil PAE concentrations specifically in maize and wheat grains indicate that wastewater irrigation can pose a contamination threat to food resources.


Bian W.,Water Resources University | Bian W.,Hebei Provincial Academy of Environmental science | Wang L.,Hebei Provincial Bureau of Environmental Protection | Zhang H.,Water Resources University | And 3 more authors.
Advanced Materials Research | Year: 2012

Aquaculture can bring excess phosphorus to lakes which causing eutrophication. Figuring out the amount of phosphorus is meaningful to water pollution control. This study aims to clarify how much phosphorus is produced by aquaculture in Baiyangdian Lake each year. A phosphorus balance equation which is based on conservation of matter is established and used to calculate the input and output phosphorus carefully of an experimental field during a breeding cycle. Six parameters which are little fish, adult fish, feed, plants, sediment deposition and release are included in the equation. By the equation, the document gets a model: Q(x)=0.033x, which shows that breeding every 1kg grass carp, there will be 0.033kg phosphorus into the water. As a result, the phosphorous pollution load of aquaculture in Baiyangdian Lake is 302.6 t/a. © (2012) Trans Tech Publications, Switzerland.


Li N.,CAS Research Center for Eco Environmental Sciences | Li N.,Renmin University of China | Li N.,Hebei Provincial Academy of Environmental science | Shan B.-Q.,CAS Research Center for Eco Environmental Sciences | And 2 more authors.
Huanjing Kexue/Environmental Science | Year: 2011

In the simulation, Bowman-Cole modified organic phosphorus fractionation system was used for the analysis of pH and temperature impact on organic phosphorus mineralization. The results showed that when pH were 6.5, 7.5 and 8.5, organic phosphorus (TOP) accounted for 31.71%-41.73%, 30.85%-43.29% and 27.25%-56.31% of total phosphorus (TP) in the sediments respectively. Alkalescent environment accelerated the process of organic phosphorus mineralization which slowed down when environment was neutral. When temperatures were 15°C, 25°C and 35°C, TOP accounted for 29.07%-46.62%, 27.81%-46.62% and 34.56%-46.62% of TP respectively. The process of organic phosphorus mineralization increased with temperature in the first 10 days but decreased in the following 20 days. Under acidic and high temperature environment, labile organic phosphorus (LOP) has a strong influence on the water quality because of the simultaneous processes of transformations from nonlabile organic phosphorus (NOP) to moderately labile organic phosphorus (MLOP) and from MLOP to LOP.


Zhou B.,Tianjin University | Zhou B.,Hebei University of Science and Technology | Gao Q.,Hebei Provincial Academy of Environmental science | Wang H.,Hebei Provincial Academy of Environmental science | And 3 more authors.
Journal of the Air and Waste Management Association | Year: 2012

The oxytetracycline bacterial residue-activated carbon (OBR-AC) prepared from oxytetracycline bacterial residue with K2CO3 under chemical activation was studied. The effects of activation temperature, activation time, and activation ratio on the specific surface area (SSA) and methylene blue adsorption (MBA) were studied. Characterization of the optimum OBR-AC was performed by using scanning electron microscopy (SEM), pore structure (PS,) and Fourier-transform infrared spectroscopy (FT-IR). The optimum parameters were as follows: 800°C activation temperature, 3 hr activation time, and 1:3 activation ratio. The SSA and MBA under optimum conditions were 1593.09 m2/g and 117.0 mg/g, respectively. Adsorption equilibrium and kinetics data were determined for the adsorption of phenol from the synthetically prepared phenol solution. The results showed that the Langmuir model gave the best fit for equilibrium isotherm, whereas the kinetics data were well fitted by the pseudo-second order model.In the past, the bacterial residues have been used for feed additives in China. Unfortunately, doubts of its suitability as a feedstock have been raised because of the small amount of antibiotics, a large number of the fermentation by-products and metabolic products and by-products remaining in the bacterial residues. So Oxytetracycline Bacterial Residue (OBR) is one of hazardous wastes in China. In order to solve the problem of OBR, the preparation of OBR-AC is studied, and OBR-AC under optimum operation parameters is characterized by Scanning Eldctron Microscopy (SEM), Pore Structure (PS) and Fourier Transfer-Infra Red (FT-IR). Moreover, the phenol adsorption isotherms and kinetics models for OBR-AC under optimum operation parameters are studied. © 2012 Copyright 2012 A& WMA.


Wei Q.,Hebei Provincial Academy of Environmental science | Li H.,Hebei Provincial Academy of Environmental science | Liu L.,Hebei Institute of Environmental science | Wang J.,Hebei Provincial Academy of Environmental science | And 2 more authors.
Advanced Materials Research | Year: 2012

Baiyangdian lake is typical macrophytic lake, located in North China. With the economic and social development, as well as the impact of global climate change, the water pollution problem has been being a serious impact on the salubrious development of regional ecosystems. The local government has adopted a change of water storage basin to approach to fundamentally solve the problems of water pollution with the ecological water transfer in lake basins. In this paper, collecting the typical water pollutants data before and after ecological water transfer, using of ArcGIS software we have researched the diffusion mode and the enrichment regulation of the water pollutants from the perspective of spatial distribution caused by the ecological water transfer. The results show that there has a strong detention of the pollutants spread in Baiyangdian lake. With the ecological water transfer, there is a positive significance onto the local water deterioration, but not a fundamental solution onto the whole lake environmental issues. It still needs to develop the integrated control-rehabilitation managements and technologies for water pollutants combined with special land-water broken terrain and the local climate in Baiyangdian lake. © (2012) Trans Tech Publications, Switzerland.


Jia G.,Hebei University | Dong D.B.,Hebei University | Liu J.Y.,Hebei University | Kang Q.Y.,Hebei Provincial Academy of Environmental science | Zhang C.M.,Hebei University
Advanced Materials Research | Year: 2014

Uniform and well-dispersed ellipsoidal BaWO4:Dy3+ particles have been prepared via a simple hydrothermal method. The as-obtained particles are non-aggregated with narrow size distribution and are composed of closely packed nanoparticles. During the hydrothermal process, the chelating agent trisodium citrate plays an important role for the formation of BaWO4:Dy3+ hierarchical ellipsoidal particles. The BaWO4:Dy3+ phosphor shows intense yellow emission corresponding to 4F9/2-6H13/2 transition of the Dy3+ ions under ultraviolet light excitation, which may find potential applications in fields of fluorescent lamps, display systems, and optoelectronic devices. © (2014) Trans Tech Publications, Switzerland.


Qin Z.,Hebei University of Technology | Liu S.,Hebei University of Technology | Liang S.-X.,Hebei University of Technology | Kang Q.,Hebei Provincial Academy of Environmental science | And 2 more authors.
Desalination and Water Treatment | Year: 2016

Due to the inability of biochemical processes to remove refractory organic compounds from wastewater in pharmaceutical industrial parks, this research tried to find a new way to meet the requirement of the Discharge Standard in China. A combined process involving micro-electrolysis, Fenton oxidation, and coagulation was studied. Considering the removal efficiencies and operation costs, the reaction conditions were optimized. The COD concentration in the effluent after the combined treatment was less than the standard limit of 50 mg/L. Molecular weight distribution of organic compounds in wastewater was analyzed by sequential filtration and ultrafiltration. When treated by the combined process, the particulate fraction (particle size > 1,000 nm) decreased, and the soluble portion (particle size < 1 nm) increased significantly. Composition of the refractory organics was investigated using GC–MS. A total of 34 types of low-molecular-weight organics were identified in the effluent, among which phthalates, amides, heterocyclic compounds, and PAHs were the main organic pollutants. All these results show that the proposed method is promising for refractory wastewater because it is efficient and easy to operate. © 2016 Balaban Desalination Publications. All rights reserved.


Zhao Q.,Water Resources University | Zhao Q.,Hebei Provincial Academy of Environmental science | Li H.,Hebei Provincial Academy of Environmental science | Wei Q.,Hebei Provincial Academy of Environmental science | Zhang H.,Water Resources University
Applied Mechanics and Materials | Year: 2011

As typical shallow lake of the north China plain, Baiyangdian plays an important role on water system composition and water amount adjustment. Its water storage and average annual rainfall of the basin does not exist directly relation and its maintenance of function water amount can only rely on unconventional water supplies and diversion support. The lack of natural entering water and frequent artificially diversion makes Baiyangdian gradually become "artificial lakes". In order to solve the current problems of Baiyangdian, the control of development indexes for Baiyangdian basin water resources urgently needs to be intensified, and water diversion mechanism of basin water amount based on Water subsidise cycle should be established. © (2011) Trans Tech Publications.

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