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Developments of ultra-high voltage grid in China require better insulation materials, and that forces the transformer presspaper and pressboard manufactures to pay more attention to the papermaking process to enhance their product qualities. In this study, pure water and three kinds of sodium chloride solutions with conductivities of 100 µS/cm, 500 µS/cm and 1000 µS/cm were respectively used to prepare...
Organic matter and turbidity in micro-polluted water could influence adsorption result of zeolite. Enhanced coagulation could remove organic matter and turbidity effectively, reduce the competition between organic matter and ammonia nitrogen, increase ammonia nitrogen strain away rate. By adding zeolite powder after adding coagulants, when coagulant dose achieve 3mg/L, the strain away rate of zeolite...
Soil samples from three profiles were collected in the areas around Huangqihai by hand drill. The TDS value and chloride concentration of fifty soil water were determined and the basic principle of the calculation of mean chloride concentration, residual flux and chloride cumulative age was introduced. From TDS value and chloride concentration profiles, it is concluded the TDS distribution is almost...
A novel, bio-based sorbent for As(III), α-Fe2O3-impregnated chitosan beads (FICB), has been successfully synthesized and tested. Batch wise adsorption experiments were performed to evaluate the adsorption conditions, reusability as well as the effect of ionic strength and coexistence of other ions. The results indicated that the maximum adsorption capacity of FICB for As(III) was 4.46 mg/g at pH 5...
Since humic acid from water causes considerable serious health-risk factors, powerful methods for the removal of those have received increasing attention over the past decade. In this paper, the available technologies for removal of humic acid from water are briefly reviewed, and the recent advancements are summarized. Fundamentals and main applications of typical methods such as filtration, flocculation...
Ammonia addition and pH depression can inhibit the formation of bromate in ozonated drinking water by reacting with free bromine (HOBr/OBr-), an intermediate in bromate formation, to form bromamines and other bromoorganic disinfection byproducts. This study was performed to assess the effects of ammonia and pH value combinations on the formation of bromate and THMs during ozonation and chlorination...
This paper has researched on the adsorption of Ni in water using Laminaria japonica and Undaria pinnatifida. The dependence on pH and nickel concentration of the adsorption was studied. Batch experiments results showed that the adsorptive capacity of Laminaria japonica and Undaria pinnatifida was 2.933mg/g and 0.985 mg/g of adsorbent. The Langmuir model was used to describe the adsorption equilibrium...
A sensitive and fast analytical method using purge-and-trap (P&T) on-line coupling with gas chromatography was developed for the determination of four trace volatile halohydrocarbons including methylene, chloroform, carbon tetrachloride and trichloroethylene in water. The analytes were purged for 10min from the sample by high purity nitrogen and preconcentrated in the cooled trap at -80 degC ...
In this paper were shown results of drinking water study of 3 Gobi provinces of Mongolia. The study was conducted in the frame of joint project ldquoThe influence of global warning to Mongolian environmentrdquo, which realized by specialists of the MUST, Miyakonojo National College of Technology, Japan.
Compounds of mercury, chrome and arsenic are very dangerous to man due to their instability and their interaction with fats, providing long periods of partial ejection, i. e. the time during which half of the agent assimilated with the organism ejects or destructs. Hence, the control of mercury, chrome and arsenic content in the water is very critical. In this paper, the sorption capabilities of the...
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