Optimization of simafix red dye decolorization by using advanced oxidation process: photo-Fenton -Nga Thi DinhThe main purpose of wastewater treatment are high removal efficiency and low cost. Based on the results of the experiment which were mentioned above we know that the optimum value of pH for Fenton processes is pH = 3. By minimum values of Fe2+(7.162 mM) and H2O2 (0.037 mM) concentrations in order to achieve the low cost in treating. Using the de...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 595 | Lượt tải: 0
Evaluation of the impact of dyke on the practice of using plant protection chemicals and the environment impact quotation index of rice cultivation areas in Thap Muoi, Dong Thap province - Nguyen Thi Van HaAlthough the EIQ has some limitation [10], the study results has indicated that EIQ could be used for future research and for integrated pesticide management evaluative efforts that emphasize the environmental affects of pesticides. It is necessary to survey and evaluate pesticide residual in next few years to be able to reach accurate conclusio...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 540 | Lượt tải: 0
Utilization of analytical technique for evaluation of δ13cdic in groundwater using ea-Irms under the condition of Vietnamese lab - Thinh Thi Hong NguyenAnalytical technique for δ13CDIC in groundwater using EA-IRMS was utilized under the condition in Vietnamese lab. As a result, the recovery of DIC in groundwater can reach an average value of 93.14 %. Good reproducibility of the international standards were achieved with the value of first standard deviation less than 0.3 ‰ as well as the accura...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 574 | Lượt tải: 0
Solvothermal synthesis of bi2wo6 and its photocatalytic activity under visible light irradiation - Trinh Duy NguyenWe have prepared Bi2WO6 using the solvothermal method at different temperatures. The phase structure and morphology of as-prepared Bi2WO6 samples were characterized by XRD, SEM, and DRS. We have also investigated the photocatalytic activity of these materials for the decomposition of RhB under visible light irradiation. From DRS results, Bi2WO6 ...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 500 | Lượt tải: 0
Synthesis and photocatalytic activities of cuo-Tio2 nanocomposites - Thi Ngoc Tu LeCuO has been successfully deposited to TNTs by two different methods (A-C and photoreduction). Compared to the A-C method, the photo-reduction method was more suitable because it remains the stability of morphology and the initial structure of TNTs. The appearance of CuO results in the gradually shifted absorption spectrum of TNTs to the longer w...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 478 | Lượt tải: 0
Combination of methane oxidation and denitrification process in a two-Stage bioreactor - Vu Phuong ThuThe two-stage bioreactor was designed to examine the combination and separation the methane oxidation and denitrification processes in an AMO-D system. Methane and oxygen should be supplied together to promote a mutual effect between methane oxidation and denitrification processes and enhance the overall efficiency. When methane and oxygen was ...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 499 | Lượt tải: 0
Surface modification of activated carbon from rice husk for enhancing the nickel(ni2+) and cadmium (cd2+) adsorption capacity - Hoa Thai MaThe effect of the fixed conditions of ACRH modification on the Ni2+ and Cd2+ adsorption capacity investigated. The results showed that concentration of HNO3 and reaction time of the modification process effect significantly to the Ni2+ and Cd2+ adsorption capacity. Based on the experimental data, the best conditions were identified to be the equ...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 501 | Lượt tải: 0
Enhanced efficiency of treatment of tnt wastewater by internal electrolysis reaction use bimetalic materials fe-Cu - Vu Duy NhonWe examined factors: pH, time, temperature, content of Fe-Cu bimetal to the efficient of TNT contaminated water treatment. Our results show that TNT concentration was reduced from 95-106.4 mg/l to 0.2 - 0.5 mg/l and decomposed almost completely after 8 hours at pH 5, 50 g Fe-Cu bimetal for 1 liter of wastewater, temperature 25 0C, and 8 hours of...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 525 | Lượt tải: 0
A new synthesis process of lignosulfonate using lignin recovered from black liquor of pulp and paper mills - Nguyen Truong GiangLignosulfonate was successfully synthesized via formaldehyde and sodium sulfite. FT-IR spectrum of both of lignosulfonates appeared peak at 626.9 cm-1, corresponds to (C=S) linkage of the sulfonic acid group. Surface tension of LS solutions are 46 mN/m and 44 mN/m, respectively. Two steps methyl sulfonation of lignin performed at 85 ºC, for 90 ...
10 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 499 | Lượt tải: 0
Expression of glutaryl7-Aminocephalosporanic acid acylase in escherichia coli bl21(de3) and immobilization of recombinant enzyme on nanoporous materials - Vu Thi Hanh NguyenBy expression of gla gene in E. coli BL21(DE3), the recombinant GLA was successfully synthesized in LB medium at 30 oC and induced by 0.4 mM of IPTG for 3 hours. Biochemical analysis showed that the recombinant enzyme has molecular weight of about 83 kDa and specific activity of 2.7 U/mg of protein. Among of nanoporous materials for immobilizati...
9 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 455 | Lượt tải: 0
