Design of wetland system for wastewater quality improvement at formosa ha tinh steel company - Viet Anh NguyenFiltration media plays an important role in constructed wetland. Balancing all criteria for wetland media such as hydraulic conductivity, headloss, total footprint required, removal efficiency and favor conditions for plants to grow is a challenging exercise for locally available media. Experiments have provided valuable information for selectio...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 773 | Lượt tải: 0
Preliminary study on separation of rare earth metals from leach solution of discarded fluorescent powder by solvent extraction - Nguyen Duc QuangIn this research, the efficiencies on rare-earth elements extractions as functions of pH levels, extractant concentration, O/A ratio, metal concentration were investigated. Based on that, the proper conditions of REEs recovery were set up to investigate the efficiency of Y, Eu and Tb recovery from acid leach solution that was leached from fluore...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 811 | Lượt tải: 0
Experimental results of adsorption of ni (II) from wastewater using coffee husk based activated carbon - Do Thuy TienCharcoalised coffee husk at different temperatures and time conditions in Ar gas environment then adsorbed Ni (II) at pH = 4; 10 g/L charcoal, 60 minutes adsorption time, initial concentration of Ni (II) was concerned in this study. The results showed that the adsorption capacity of Ni (II) of charcoal was quite good (1.9 mg/g). Study on the den...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 790 | Lượt tải: 0
Metal bioaccumulation in fishes and macro zooplankton in some lakes in Ha Noi - Pham Thi HongMetal accumulated differently in liver, gill, and muscle. Among the fish’s organs, liver had highest metal concentration. The Zn accumulation in muscle significantly correlated to water temperature. There were no correlation between tropic status and the metal accumulation in fish’s organs. A variation of metal concentrations in macro zooplankto...
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Modification of oxidized activated carbon surface by fe and mn for arsenic removal from aquerous solution - Pham Thi Hai ThinhIn order to improving adsorption properties of AC for arsenic, manganese and iron were impregnated on oxidized activated carbon. From this research, the effect of pH is significant on adsorption capacities of As (III) and As (V). The OAC-Fe, OAC-Mn gives more adsorption capacity of all types of arsenic species than that of AC-Fe, AC-Mn. OAC-Mn a...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 716 | Lượt tải: 0
Investigation and ecological risk assessment of pb, as and hg in sediment of Tam Giang-Cau hai lagoon, Thua Thien Hue province - Duong Van HieuContamination of heavy metals in the sediment is an important problem for the lagoons. Basing on the investigation results from Sam Chuon lagoon, concentration of heavy metals was met the criteria standard of Viet Nam for the sediment, except for Hg at some stations. However, calculation of risk indices showed that Sam Chuon lagoon are polluted ...
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Study of copper removal in water by ion exchange material - Pham Thi Hang HaiFTIR spectrum showed that PS and PSW after being modified by H2SO4 contained –SO3H functional group, and the appearance of –SO3H in PSW is more remarkable comparing to PS. PSW-S, shows a much higher adsorption efficiency of Cu (II) comparing to PS-S (74.13 and 9.61% respectively). The set of optimal conditions for the 8 mm-diameter ion exchange ...
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Phosphate removal from aqueous solution by using modified sludge from water treatment plant - Dang Thi Thanh LocSludge modified by humic acid (in a weight ratio of 10:1) and heated at 600 °C showed a great chemically and physically activated adsorbent. SEM image indicated that the porous structural aspects of the MS suitable for removing P from aqueous solution. The optimum adsorption conditions for the adsorption of MS are 10 mg/L initial P concentration...
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Acute toxicity of the ethanol extract and ethyl acetate fraction of eupatorium fortunei to daphnia magna - Pham Thanh NgaThe present work indicated that the ethanol extract and its ethyl acetate fraction of Eupatorium fortunei Turcz had the different acute toxicity to D. magna after 24 and 48 hours of exposure. The ethanol extract was less toxic to D. magna with LC50-24h and LC50-48h of 247 and 183 mg.L-1, respectively. In terms of ethyl acetate fraction, the valu...
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Energy consumption and air emission inventory for transportation sectors of Viet Nam - Pham Thi HueAs calculated in Vietnam 2016, total energy consumption and CO2 emission of N3, N27÷N35, N36 are 15.90 Mtoe and 44.20 Mt, respectively. The results show the biggest contribution of transport activities in term of energy consumption and air emissions of Vietnamese economy. The study also evidences that among transportation service sectors, the r...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 788 | Lượt tải: 0
