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Porous magnetic chitosan microspheres were prepared with reversed-phase suspension methodology using epichlorohydrin as cross-linking reagent and using CaCO3 as porogen for adsorption copper (II). Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) confirmed that the microsphere was homogeneous and highly porous. Experiments were performed at different pH of solution, contact...
A novel fluorescent probe bearing 5, 10-bis (4-N-(N′-2-pyridyl methylamino) oxamide phenyl)-15, 20-diphenyl porphyrin (PorBM) was synthesized and charactered. The selective recognition of the copper ions was studied systemly using fluorescent titrations and UV titrations in mixed organicaqueous solution, the results showed that PorBM could be regard as a fluorescent probe towards copper ions with...
In this paper, the removal of aflatoxins B2 from water is studied and a new adsorbent Cu/PTMAB-MMT is prepared. The change of the microscopic structure of the absorbent before and after adsorption reaction is analyzed by TEM, XRD and EPR. The effect of temperature and PH on the adsorption are studied and also the best temperature and PH are determined.
In this paper, a new coupling process called Fe-Cu internal electrolysis coupling with bentonite in treating chromate waste water was introduced. Iron slag, copper wire and bentonite with suitable proportion were put in an airtight jar with chromate waste water. The influence of contact time, pH, the ratio of weight of iron and copper, the dosage of bentonite and initial concentration of Cr(VI) on...
In this paper, Cu-Ce/TiO2 nano-particles were synthesized by sol-gel method with copper nitrate Cu(NO3)2·3H2O, cerium nitrate Ce(NO3)3·6H2O, and Ti(C4H9O)4. Their photocatalytic activities were evaluated by degrading formaldehyde gas under visible light irradiation. The photocatalytic activity of Cu-Ce/TiO2 nano-particles, in the visible light, is influenced by Cu-Ce-doped loading (A factor), Cu-Ce...
To find out heavy metal pollution in and ecological risks of the sediments in Daliaohe Estuary, 19 surface sediment samples were collected from Daliaohe Estuary and analyzed for contents of Cu, Pb, Zn and Cr. The Indices of Geo-accumulation and Mean Sediment Quality Guideline Quotient were employed to evaluate the pollution status and ecological risks. Similar results were obtained through these two...
According to the concentrations of Cr, Cu, Zn, As, Cd and Pb in the latosol f rom the West of Hainan Island, the integrated pollution effect of heavy metals of these latosol is evaluated by the technique of single factor index and Hakanson ecological risk.The results show that the average concentration of Cr, Cu, Zn, As, Cd and Pb is 39.245 mg/kg, 36.937 mg/kg, 57.997mg/kg , 17.606mg/kg, 0.198mg/kg,...
Soil pH is one of the important influencing factors of copper (Cu) speciation and toxicity. The Cu acute toxicity to barley (Hordeum vulgare) of different pH values were investigated to provide the basis for soil quality criteria and a risk assessment. The results showed that a significant nonlinear correlation between total Cu concentration or dissolved Cu concentration and the percentages of barley...
Pot experiments were conducted to investigate the effects of three different chelating agents(EDTA, citric acid, NTA) that intensify the absorption and accumulation of Cu, Zn in vermicompost for Euchlaena Mexicana Schrad. The results indicated that chelating agents addition could inhibit the growth of Euchlaena Mexicana Schrad, and the inhibition on the roots is greater than the shoots. At the same...
A pot culture experiment was conducted to study the role of inoculations with four microbial inocula, singly or in combination, in heavy metal uptake from contaminated soil by Elsholtzia splendens. The four inocula, Glomus caledonium 90036 (36), an inoculum containing mixed arbuscular mycorrhizal fungi (ZJ), an inoculum containing two Cu-tolerant Penicillium species (F) and an inoculum containing...
The pollution of Jiaozhou Bay was investigated by measuring the trace elements of surface sediments. Sediment samples were collected at 33 locations in Jiaozhou Bay in November 2003. The large-scale distribution pattern of metals in surface sediments showed elevated levels of Cd, Cr, Cu, Pb, Hg compared with values obtained in 1989. Concentrations of soil-related elements such as Al, Fe, Mn did not...
Near the effluent of an electroplating factory in north Guangxi, samples were collected and analyzed in four years. The soil and rice samples were from a river nearby. It was proved that they were polluted by heavy metals in the polluted river. The accumulation effect of the pollution was remarkable. The results showed that the heavy metal contentration of soil was mainly decided by the heavy metal...
Soil nematode community trophic-group composition in petroleum hydrocarbons and heavy metal contaminated soil was studied in Liaohe Oilfield, whose oil-well sites had received slurry, crude oil and wastewater during their exploitations. Three sampling sites including the new oil-well site (exploited in 2001), old oil-well site (exploited in 1972) and reedfield (unexploited, as control) were selected,...
Based on the fact that the primary copper sulfide bioleaching has long leaching time and low leaching rate and has not been used in industry, through selective breeding, domesticated species leaching good using the scanning electron microscopy. The chalcopyrite bioleaching by A. ferrooxidans was studied. Understanding of passivation phenomenon of chalcopyrite surface and the types of passivation layer...
The lipophilic copper nanoparticles were synthesized by surface modification method to improve their dispersion stability in oils or hydrophobic organic media. The nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and infrared spectrometer (IR). Oil-based nanofluids were then prepared. Thermal conductivity of the nanofluids has been investigated....
Spatial distribution of metal concentrations in the surface sediment samples collected from 19 marine at Guanhe estuary in Haizhou Bay, Lianyungang was studied. Heavy metal (Cu, Zn, Pb, Cd, Cr, As, Ni, Mn) concentrations were determined and geo-accumulation index (Igeo) was calculated to understand the pollution status of the study area based on the background values. The ranges of the measured concentrations...
Bulk Cu50Zr42Al8 amorphous coniform shape samples (10mm in diameter at bottom and 80mm in length) were successfully prepared by the arc-melting master alloy in the water-cooled copper crucible and then suck cast in the copper mold. Using the techniques of X-ray diffraction, Optical microscope, SEM and TEM analysis. The experimental investigation of the samples research of axial and radial characteristics...
Activated Carbon is a water treatment adsorbent with a large adsorption capacity, its adsorption capacity will be able to greatly enhance after modified activated. Through the use of before and after the modification of mesoporous activated carbon powder to the heavy metals copper ion adsorption, the effects of different pH, adsorption temperature, balance time, the amount of activated carbon adsorption...
The V2O5 and CuxV2O5 films as the anode of V2O5/LiPON / LiCoO2 lithium microbatteries were prepared by RF magnetron sputtering method. The microbatteries were fabricated by micro electro-mechanical system (MEMS) technology. The films' structures, surface morphologies, and composition were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy...
The contents of soil nutrient elements (N, P, K, Fe, Mn), toxic and harmful elements (Cr, Hg, As, Pb, Cu, Zn, Ni, Cd) and their influenceing factors in sequentially aged eucalyptus (2–7years) were analysed in the vicinity of mine that have affected the surrounding ecological environment in Guangdong province to estimate the changes of elements in soil and plants with aging. The results showed that...
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