Advanced Materials Research Vols. 807-809

Abstract: After three decades of rapid development in reform and opening, Guangdong encounters a bottleneck of resources and environmental constraints, in which its reflection should be learned by Chongqing, thus to prevent going into the same Crossroads after development of electronic information industry in future. Guiyu Phenomenon is a gradual process, in which, the electronic waste disposal has brought purely economic interests, and environmental and ecological crisis was reflected at the same time. In Chongqing, this painful lesson should be prevented in advance in electronic information industry developing. The Smile Chain of Industry Profit and the Wry Smile Chain of Industry Pollution should be alert to Chongqing: if an incorrect decision of industry was choose, meager profits may be brought and serious long-term potential ecological crisis may be brought. Only by strengthening the pre-research, rational decision-making, and synchronization of environmental impact assessment and monitoring, the electronic information industry in Chongqing can go out of the trap of development.

Abstract: FLUENT software and SIMPLE algorithm which was based on parity grid was used to carry out the numerical simulation of spraying dust gas-particle two-phase flow field of the mechanized working face with a single pressure pumping hybrid ventilation system. The dust distribution law of the mechanized working face was mastered and the main dust prevention area was determined to be the middle of the roadway and wall-attachment fan drum enclosed dust removal system of mechanized working face was also planned to be established according to the simulation result. It had been proved that fully-mechanized coal winning machine enclosed dust removal system had a large advantage in reducing dust by computer simulation and field application, the dust suppression effect was remarkable.

Abstract: This article uses the design of experiment and researches the effects of proximity and empathy on environmental responsible behavior. The results show that:(1) Proximity have a significant positive effects on individuals environmental protection behavior;(2) When the degree of proximity is high, the different level of empathy have no significant effects on environmental responsible behavior; However, when the proximity is low, a high degree of empathy is more easier to motivates ones environmental responsible behavior than it.

Abstract: Based on the hedonic price method and the calculation model of environmental influence cost per km per bus, this paper analyzes and quantifies the cost of environmental pollution and the environmental impact caused by the urban rail transit. The theory of willingness to pay (WTP) also be referred in the calculation model.

Abstract: The synergistic effects of mixtures of CdCl₂, Ni (NO₃)₂, CuSO₄, and ZnSO₄ on photobacterium Q67 were predicted and evaluated by using models of concentration addition (CA), independent action (IA), effect summation (ES), ES with the exponent e (ESE), ES with the power of the number of components n (ESN), and integrated CA with IA based on multiple linear regression (MLR) model (ICIM). The effects of all mixtures were underestimated by CA, IA, ES, ESE, and ESN models, but were effectively predicted by the ICIM model.

Abstract: The potential effect of 1,2-dichlorobenzene (1,2-DCB) on anaerobic microbial populations was investigated in a flooded wetland soil. Numbers of anaerobic fermentative bacteria (AFB), denitrifying bacteria (DNB) and hydrogen-producing acetogenic bacteria (HPAB) were numerated by three-tube anaerobic most-probable-number (MPN) methods with anaerobic liquid enrichment media. In anaerobic microbe groups, the changes of bacterium group were not the same. 1,2-Dichlorobenzene had the maximum influence on microbial groups of wetland soil at the initial pollution. In dealing with 14-35 days, bacterium groups in each processing soil have different amplitude bouncing back. In the experimental process, bacteria which produces hydrogen and acetic acid is most sensitive to 1,2-Dichlorobenzene. Hydrolysis fermentation bacteria second, and denitrifying bacteria was the smallest.

Abstract: The activity response of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), ATP enzyme activities of Escherichia coli Q8, Bacillus subtilis L11, and Bacillus cereus OL-1 following exposure to 1,2-dichlorobenzene (1,2-DCB) was investigated. The bacterial strains were treated with the different concentrations of 1,2-DCB. Results obtained indicated that SOD and CAT activities in the tested bacteria increased significantly in a concentration-dependent manner after different concentrations of 1,2-DCB were applied. The activity of SOD in B. subtilis was stimulated and reached the highest level after treatment with 10 mg/L 1,2-DCB for 3 h. For B.cereus OL-1, there was another stimulation of SOD activity after 1,2-DCB application for about 5 h The stimulation by 1,2-DCB showed a relative lag for E. coli. 1,2-DCB had an evident influence on ATPase activity in the three bacteria within a relatively short period. 1,2-DCB would have caused a certain oxidative stress on the three bacteria which may not only elevate SOD and CAT activities but also generate new SOD isozymes to antagonize oxidative stress. All indirectly reflect the existence of poisonous and harmful material in the environment , and can indicate the influence of pollution sensitivily. Therefore SOD, CAT and ATP enzyme activity in microbial body can be regarded as a molecular index of polluting ,which is feasible.

Abstract: The low-dose and combined effects of aniline, 2-methylaniline, 3-methylaniline, 4-methylaniline, 2-nitroaniline, 3-nitroaniline, 4-nitroaniline, 2-chloroaniline, 3-chloroaniline, and 4-chloroaniline on photobacterium Vibrio qinghaiensis were predicted and evaluated by using concentration addition (CA) and independent action (IA) models. The mixtures effects can be predicted by CA and IA models, which indicate that aniline derivatives present additive toxicity.

Abstract: The aim of this study was to investigate lead (Pb) level and spatial distribution pattern in the household dust around a smelter in Yunnan. The Pb content in the dust ranges from 191~13371mg/kg, with significant differences among the investigated villages, and 89.33% of the samples exceed the secondary limit of Chinese Soil Environmental Quality Standard for Pb. Spatial analysis shows that the pollution center was close to CH-co, and the radial distribution pattern is consistent with the predominant wind derection. The investigation proved that, lead emitted from the smelting process via atomospheric deposit is the main source of the Pb in the indoor dust, which may cause a potential adverse effect on people in the studying district.

Abstract: In order to guarantee the reliability and security of reclaiming water, research on the removal efficiency of the environmental endocrine chemicals (EDCs) --the Phthalate Esters (PAEs) in conventional secondary activated sludge and wastewater reclamation and reuse process was undergoing at Harbin wastewater treatment plant (WWTP). The wastewater samples were colleted from every unit effluent of WWTP. The results showed that contamination of EDCs were presented in municipal wastewater at Harbin and the concentrations of the four PAEs were 21.01μg/L for Di-n-butyl Phthalate (DBP); 9.63μg/L for Di-n-octyl Phthalate (DnOP); 4.56μg/L for Diethyl Phthalate (DEP); 1.96μg/L for Dimethyl Phthalate (DMP) respectively in the influent. The conventional activated sludge has good removal efficiencies performance on DMP, DEP and DBP. With the increasing of molecular weight and branch chains of PAEs contaminations, the removal rate of the four PAEs in the conventional activated sludge process decreased from 99.82%(DMP)，90.60%(DEP)，90.10%(DBP) to the only 45.13% removal rate for DnOP, which was mostly removed from primary treatment but no from secondary activated sludge process; Coagulation-air flotation plus filtration process was not a feasible way to remove PAEs from reclaiming treatment units.