Nature Environment and Pollution Technology

Yang Yang ¹, Fuquan Ni ¹, Yu Deng ¹

Affiliations
1 College of Water Resource and Hydropower, Sichuan Agricultural University, Ya’an-625014, Sichuan, CN

Abstract

In order to achieve the scientific water resources management in Sichuan province, by adopting the relevant data from Integrated Planning Report of River Basin in Sichuan province and by researching the 21 cities (states) in Sichuan province as well as water resource divisions, the volume and quality of water resources in the whole province were found out. The available surface water and the total available water resources in the whole province were calculated; water use, water use efficiency, change process of water use, water consumption and other water use statuses were analysed; water resource demands of life (including both urban and rural areas), production (including farm irrigation, plantation and pasturage, fishing and livestocks, industry, construction industry and tertiary industry) and ecological environment were predicted; and control indexes of the total water allocation and total water drawing were calculated. Thus, the scientific basis for enforcing the scientific management of water resources is provided.

Keywords

Water Quality, Water Use Efficiency, Water Allocation, Water Resource Management, Sichuan Province.

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Sheng Cheng ¹, Yang Yang ¹, Jiangtao Liu ²

Affiliations
1 School of Economics and Management, China University of Geosciences, Wuhan, Hubei 430074, CN
2 Dept. of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, Ontarion, CA

Abstract

Following rapid economic growth, the environmental pollution is getting worse in most regions in China. Meanwhile, the urbanization and industrialization of China has not completed yet, with energy consumption continuing to grow, environmental carrying capacity is becoming smaller and smaller, which leads to emission reduction cost continues to grow. This paper analysed convergence of economic growth and carbon emission intensity of the east, central and west regions in China by using panel date, and the results show that economic growth is β conditional convergence while carbon emissions intensity is β absolute convergence. By building relation model between carbon emission intensity gap and economic gap, introducing in elastic coefficient η, it was found that when the central and west regions narrow their economic gap with the east region by 1 percent, it leads to their carbon emission intensity gap with the east region narrow by 0.5712 and 0.5900 percent respectively, which shows that when the central and west regions are narrowing their economic gap with the east region, 'the narrowing' is based on energy-saving and emission-reduction. At the same time it can also be found that convergent rating of economy is quicker than that of carbon emission intensity, which suggests that energy-saving and emission-reduction is still what China need to follow when promoting balanced development of regional economy. Based on the above results, some useful suggestions to promote collaborative development of regional economy and synchronous collaborative development between regional carbon emission intensity and economic development were given.

Keywords

Carbon Emission Intensity, Convergence Development, Economic Growth, Environment Protection.

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Hao Wang ¹, Yang Yang ¹, Xiao Liu ¹, Huiyuan Zhong ¹, Guozhu Bo ¹, Yaozong Zhang ²

Affiliations
1 College of Civil and Architecture Engineering, North China University of Science and Technology, Tangshan, 063009, CN
2 Tangshan City Drainage Co., Ltd., Tangshan, 063001, CN

Abstract

In this research, the electrochemical oxidation with a three-dimensional electrode system, with coke serving as packed bed particle electrodes, was applied for the removal of ammonia nitrogen in biologically pretreated coking wastewater. Surface characteristics of the anode plate and the coke were analysed. The results showed that there had been few cracks on the coating surface of anode and the coating layer had been compact before electrolysis, while the coating surface became relatively rough after electrolysis and small cracks appeared on anode surface. Meanwhile, the surface of prepared coke was porous at the beginning, which enabled it to have adsorption effect, while after electrolysis, the surface of the used coke became dense, which made it function better as packed bed electrodes. In addition, operating variables of retention time, plate spacing, area/volume, current density, pH and chloride concentration were investigated respectively to check their influence on ammonia nitrogen removal. Meanwhile, the results showed that the electrochemical three-dimensional Ti/RuO₂/IrO₂ electrodes could remove ammonia nitrogen efficiently, and when plate distance was 1.0cm, retention time was 40min and current density was 4.5mA/cm², the highest ammonia nitrogen removal rate of about 95% was achieved, which was much higher than the removal rate of the system when Ti/RuO₂/IrO₂ electrodes were used in single under the same condition.

Keywords

Coking Wastewater, Ti/RuO₂/IrO₂ Electrodes, Ammonia Nitrogen, Electrochemical Oxidation.

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