Advanced Materials Research Vols. 945-949

Abstract: Adopts the method of adding demulsifiers into the oily wastewater to increase the droplets size to further improve the efficiency of oil-water separation, and puts forward the corresponding optimized indicators and methods of demulsifiers. The optimized selection of the demulsifiers and its additive dosage was carried out by indoor experiments based on the optimized indicators. Using artificial produced water to test the treatment effect of the optimized demulsifier at different action time. The experiments show that demulsifier S1 with additive dosage of 20mg/l can accordance with the requirements of the processing very well, and as the increase of action time, the average size of droplets increase and the amount of the droplets which under 1μm decrease.

Abstract: The adhesion of microorganisms to the floating cages in the aquaculture industry is currently controlled with copper as a biocide paints problem. The development of these activities has resulted in marine and freshwater sediments next to the culture centers high levels of copper. Due to these problems of environmental pollution, at present have been implemented new technologies of biological origin for the detoxification of ecosystems through the use of microorganisms (fungi, yeasts and bacteria). Therefore the main objective of this work is the search for marine microorganisms for the removal of copper. For this, samples were collected from marine sediment contaminated with copper Tenglo Channel (41 ° 29'23 .59 " S, 72 ° 58'06 .70" W). Gram negative bacterium of marine sediment was isolated in TSA medium supplemented with 7 mM Cu (II), this strain was designated as LMAE-2. The phylogenetic analysis has a 97 % similarity with Pantoea agglomerans. The high resistance for copper was determined at 9 mM. Finally, the metal removal capacity of this bacterium was determinate in 11.6% by Atomic Absorption Spectrometry. These results suggest that marine bacteria could be a biologic model system for use in processes for removal this toxic metal.

Abstract: In order to investigate the biosorption of Cu²⁺ by anaerobic granular sludge, the effect of equilibrium time, pH, sludge dosage, biosorption kinetics, biosorption thermodynamics and biosorption isotherms had been studied. Results showed that pseudo second-order kinetic model was useful to describe the biosorption process of Cu²⁺. Both Langmuir and Freundlich isotherm equations could well describe the desorption process at 15-55 °C. Thermodynamic studies showed that the biosorption process was spontaneous and endothermic in nature. When the solution temperature maintained at 35 °C, pH of 6~7, a good biosorption process could be obtained.

Abstract: An overview of environmental protection technologies of modern lead-acid battery production is presented. Types of pollutants of lead acid battery in the production process are discussed and analyzed. Focusing on the different types of pollutants produced in different processes, and several environmental machines used in lead-acid battery are specifically introduced

Abstract: Through sampling test of mercury content and existence form in mercury halo zone of selected typical mercury mining area, distribution regularities of mercury in soil was analyzed and would provide basic datum for people’s health protection and soil environmental remediation in mercury halo zone.

Abstract: The relative carrying capacity of resources was used to analyze the Dynamic Changes of in Dongting Lake idea. The relative carrying capacity of natura resources, economy resources and synthetic capacity and their dynamic changes of Dongting Lake idea from 2004 to 2011 were calculated. The results shown that the Dongting Lake Area is in population relatively overloaded state. The consultation was drawn as strengthen the flood management and water conservancy facilities, transform economic growth mode, strict control population should be taken to reduce population growth pressures on resources in the Dongting Lake area.

Abstract: The relative carrying capacity of resources was used to analyze the dynamic changes of Hunan province. The relative carrying capacity of land resources, water resources, economy resources and synthetic capacity of Hunan province compared with Whole County and Jiangsu province from2004 to 2011 were calculated. The results shown that the Hunan province is in population relatively overloaded state. The consultation was drawn as transform economic growth mode, strict control population in resources lack and environmental vulnerability areas should be taken to reduce population growth pressures on resources.

Abstract: The optimal condition of polysilicon ferric chloride (PFSC) flocculant was established by thinking of the factors , such as Si/Fe molar ratios,the reaction temperature and the pH value of the solution. When the molar ratio of Si and Fe = 1, pH value = 0.6, curing temperature at 30 ~40 °C, poly ferric chloride dosage of 0.75mg/L, the rate of turbidity removal of seawater is up to 96.5%. Experimental results show that poly ferric chloride seawater turbidity removal effect is obvious.

Abstract: The design of the municipal life waste recycling path is an integral part of the whole recycling system, it occupies an important position, and its improvement and optimization play a vital role on efficient operation of municipal waste recycling system. Based on analysis, combined with modern logistics theory, aiming at optimization, this paper sets up models for collecting and transshipping paths of municipal waste recycling system.

Abstract: Considering each interdune lowland as a self-contained unit, we investigated species composition of 15 interdune lowlands in stabilized and active dunes, respectively, and identified the relationship of species richness and lowland area. The results showed that 1) with the enlargement of lowland area, the overall species richness of interdune lowlands in stabilized and active dunes increased logarithmically. When the area was the same, richness of stabilized dunes was more than that of active dunes. 2) with the increasing of lowland area in stabilized and active dunes, psammophytes richness relative to the overall species richness decreased logarithmically. When the area was the same, the percentage in lowlands of active dunes was more than that of stabilized dunes. Therefore, We concluded that dune stabilization, on one hand, raises species richness and on the other, leads to the loss of endemic or rare psammophytes in interdune lowlands.