Applied Mechanics and Materials Vols. 522-524

Abstract: Benzaldehyde was produced from oxidation of cinnamaldehyde by hydrogen peroxide in propylene glycol in the presence of sodium bicarbonate. Protic solvent demonstrated high selectivity and the yield of benzaldehyde could reach up to 82% in propylene glycol. The effect of solvent on the selectivity was attributed to hydrogen bond interaction between the oxidation intermediate epoxide and the solvent.

Abstract: Experimental study on the manganese sand, magnetite, quartz sand, ceramsite, volcanic rock in northeast China five different filter material of groundwater, and the effects of biological iron and manganese removal. Test results show that the effect of 4 kinds of filter material in addition to iron and manganese in turn is: manganese sand > magnetite > quartz sand > ceramsite.

Abstract: The flesh ash (F) was grafted with diethylenetriamine (DETAF), triethylenetetramine (TETAF) and polyethylene polyamine (HPAXF), respectively. A comparative study of Cu²⁺ and Pb²⁺ removal from aqueous solution using F, DETAF, TETAF and HPAXF was performed. Effects of liquid-solid ratio, temperature and time on adsorption capacity were studied. Batch tests were carried out to investigate the adsorption performance. The process of Cu²⁺ and Pb²⁺ onto DETAF, TETAF and HPAXF both fitted well with Lagergren pseudo-second-order model, The isothermal of Cu²⁺ and Pb²⁺ adsorption onto DETAF, TETAF and HPAXF can be described by Freundlich model.

Abstract: The adsorption effect of NO₃^-, SO₄^2- or PO₄^3- about As (V) on the novel porous biomorph-genetic composite of Fe₂O₃/Fe₃O₄/C was prepared with eucalyptus wood template (PBGC-Fe/C) was analyzed and considered. The results show that NO₃^-, SO₄^2- and PO₄^3- have different change trend onto the PBGC-Fe/C adsorbent under initial As (V) concentration of 5, 10, 50mg/L, the competitive adsorption capacity is: PO₄^3-> NO₃^-> SO₄^2-. And with increasing of NO₃^-, SO₄^2- and PO₄^3- concentration, the competitive adsorption phenomenon is more violent.

Abstract: This article describes some recent research and application of bismuth-based photocatalysts, and analyse the influence of preparation method, catalyst structure, composition and morphology on the organic pollutants degradation.

Abstract: 7-amino-cephalsporanic acid (7-ACA) is the key intermediate of cephalosporin, which has a strong sensitization and explosion hazard. So it seriously affects the worker’s health in the workshop, the environment safety out of the workshop and work safety. The drying workshop of 7-ACA at a pharmaceutical enterprise in Shijiazhuang is investigated and the production process is analyzed, the key places of dust leakage and the causes of dust generation are identified. Combined with the pollution and safety risk in drying workshop, the targeted control measures are taken from the process technology, ventilation system and dust collecting device, which effectively removed the adverse effects from 7-ACA leaking. The study provides a reference for the dust control in similar enterprises.

Abstract: In order to get a scientific assessment of the coastal ecosystem health in Qingdao, a study on ecosystem health assessment of Qingdao coastal zone during 1998-2009 based on press-state-response (PSR) model contained a series of indicators was conducted. In this paper, the integrated ecosystem health index was calculated through weight values multiplied the standardization values of the indicators. The results indicated that the IEHI in the coastal zone of Qingdao fluctuated by a large margin during 1998-2009, when the IEHI range from 0.35 to 0.84, and the ecosystem was in the states of unhealthy and subhealthy in most of the time interval. The urban expansion and the three wastes were the dominating pressure factors which effected the coastal ecosystem health. The atmosphere and inshore environment took a turn for the worse, while the cultivated land resource exhausted almost. In order to improve the coastal ecosystem health, it was quite necessary to increase the forest coverage rate, tertiary industry proportion and investment in environmental protection.

Abstract: China's higher education has entered a rapid development period, the total number of students increased dramatically, using the north-south double-sided architectural design of high-rise dormitory buildings constantly emerge. The indoor air quality of dormitory using central air-conditioning for heating and cooling has become the focus problem. To the north of the dormitory air conditioning as the research object, under the same condition and simulate and analysis the airflow of the side air supply and the top air supply of the air conditioning and ventilation room. The results show that the room adopt the side air supply form has more superiority in comfort and economy.

Abstract: Air speed affects convective and evaporative heat losses from the human body. Some physiological parameters such as conduction speeds of nerves and body temperature are considered to can directly indicate the responses of human body to air speed. The aim of this paper is to seek the appropriate physiological parameters and acquire the primary affected trends. The research methods included questionnaire, physic test, and physiology test. Through changing the indoor air speed, tested the body temperature, conduction speeds of sensory nerve and motorial nerve of the subjects and recorded the subjects subjective thermal senses. With the increase of blowing time, the conduction speeds of sensory nerve and motorial nerve both tend to diminish. The thermal senses vote changes quickly from neutrality to light cool and cool. This experiment also shows thermal comfort senses can be expressed with the quantification form of the physiology indexes.

Abstract: As one of countries which is suffering marine disasters, china is confronted with escalating threat to peoples lives and property caused by serious marine natural disasters. This paper propose some suggestions about marine disasters risky zoning, marine disasters risky assessment and troubleshooting of construction projects, marine disasters early warning, in order to contribute some efforts to system construction of marine disaster prevention and mitigation and integrated risky management of marine disasters.