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| 1 | Synthesis of cation exchange resin-supported iron and magnesium oxides/hydroxides composite for nitrate removal in water显示文摘In this study,we reported on the concept and practical use of cation exchange resin(CER)for removing anions in water via pretreating the CER with metal salts.The cation exchange resinsupported iron and magnesium oxides/hydroxides composite(FeMg/CER)was synthesized and introduced as a new and potential adsorbent for selective removal of nitrate ion in the water environment.Characteristics of FeMg/CER were determined by techniques such as Fouriertransform infrared spectroscopy,scanning electron microscopy,and Xray diffraction.The results showed that FeMg/CER material had a high nitrate adsorption capacity of 200 mg NO_(3)^()·g^(1)with a fast equilibrium adsorption time of 30 min at pH 5.In addition,it had good durability of at least 10 times of regeneration,which could be applied to practical water and wastewater treatment. | Trung Thanh Nguyen Vu Anh Khoa Tran Le Ba Tran Phuoc Toan Phan Minh Tan Nguyen Long Giang Bach Surapol Padungthon Cong Khiem Ta Nhat Huy Nguyen | 2021 | Chinese Journal of Chemical Engineering2021，34，4： | 2 |
| 2 | Study on Establishing a Monitoring System for Groundwater in the Condition of Climate Change and Sea Level Rise: Case Study of Ma River Basin in Vietnam显示文摘 | Doan Van Long Nguyen Minh Khuyen Bui Cong Du | 2015 | Journal of Environmental Science and Engineering(B)2015，4，9： | 0 |
| 3 | Brunner’s gland hyperplasia associated with lipomatous pseudohypertrophy of the pancreas presenting with gastrointestinal bleeding:A case report显示文摘BACKGROUND Brunner’s gland hyperplasia(BGH)is a rare benign lesion of the duodenum.Lipomatous pseudohypertrophy(LiPH)of the pancreas is an extremely rare disease.Because each condition is rare,the probability of purely coincidental coexistence of both conditions is extremely low.CASE SUMMARY We report a 26-year-old man presenting to our hospital with symptoms of recurrent upper gastrointestinal bleeding.Upper gastrointestinal endoscopy showed a huge pedunculated polypoid lesion in the duodenum with bleeding at the base of the lesion.Histopathological examination of the duodenal biopsy specimens showed BGH.Besides,abdominal computed tomography and magnetic resonance imaging revealed marked fat replacement over the entire pancreas,confirmed by histopathological evaluation on percutaneous pancreatic biopsies.Based on the radiological and histological findings,LiPH of the pancreas and BGH were diagnosed.The patient refused any surgical intervention.Therefore,he was managed with supportive treatment.The patient’s symptoms improved and there was no further bleeding.CONCLUSION This is the first well-documented case showing the coexistence of LiPH of the pancreas and BGH. | Long Cong Nguyen Khanh Truong Vu Trang Thi Thuy Vo Chau Ha Trinh Tan Dang Do Ngoc Thi Van Pham Tuyen Van Pham Thanh Tuan Nguyen Hiep Canh Nguyen Jeong-Sik Byeon | 2021 | World Journal of Clinical Cases2021，9，31： | 0 |
| 4 | Using Visual MODFLOW Model to Assess the Efficiency of Subsurface Barrier Wall for Groundwater Flow Regulation and Reduction of Saline Intrution显示文摘Barrier walls effectively store water,regulate underground flows,improve exploitable reserves and prevent saltwater intrusion.The effectiveness of the underground barrier wall depends not only on the hydrogeological structure,the technical parameters of the wall but also on the layout scheme of the exploitation well system.The results showed that in natural conditions,the ground water level upstream of the barrier wall rose in the presence of a barrier wall.In wells located downstream of high barrier walls,the water level decreased.The amount of underground current flowing into the sea decreased,the annual average value of the whole region decreased was 316 m3/day and night.In presence of a wall,both the water level and the amount of evaporation increased.The average increase in evaporation volume during the calculation period of ten thousand days with walls was 4.114 m3/d.So in presence of a wall,the amount of water that can be exploited increases by the total amount of evaporation plus the decrease in discharge to the sea and is equal to 4,424 m3/d.In the exploitation condition,if the water level in the presence of wall is kept as low as in the absence of wall,the exploitation flow will increase to about 4,400 m3/day and night.From the calculated water level values when there is a wall and without a wall,we can see that if the exploitation flow in presence of a wall and in the absence of wall is the same,the water level drop at the calculated observation wells upstream of the wall will decrease from 0.21 m to 3.97 m.The condition of effective exploitation of the wall depends on the mining scheme.The exploitation scheme is reasonable,the exploitation flow of the wells does not exceed the allowable flow so as not to cause the drying of the aquifer at the location of the well.The upstream area of the wall reflects quite clearly as the Total dissolved solids content in observation wells upstream of the wall at the end of the calculation time is significantly reduced compared to that without the wall,ranging from 69 mg/L to 5,629 mg/L.In the presence of a wall,the water level of observation wells upstream of the wall is higher than that of without a wall from 0.10 m to 0.74 m. | Nguyen Minh Khuyen Doan Van Long Nguyen Tien Bach Tang Huu Dong Bui Cong Du Dang Dinh Phuc | 2021 | Journal of Environmental Science and Engineering(A)2021，10，3： | 0 |
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