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Yan ZC, Jiang N, Zhang HX, Zhou Q, Liu XL, Sun F, Yang RM, He HB, Zhao ZG, Zhu ZM. [Efficacy and feasibility of catheter-based adrenal ablation on Cushing's syndrome associated hypertension]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:1152-1159. [PMID: 37963750 DOI: 10.3760/cma.j.cn112148-20230801-00045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Objective: To explore the value of catheter-based adrenal ablation in treating Cushing's syndrome (CS)-associated hypertension. Methods: A clinical study was conducted in patients with CS, who received catheter-based adrenal ablation between March 2018 and July 2023 in Daping Hospital. Parameters monitored were blood pressure (outpatient and 24-hour ambulatory), body weight, clinical characteristics, serum cortisol and adrenocorticotropic hormone (ACTH) at 8 am, 24-hour urinary free cortisol (24 h UFC), fasting blood glucose and postoperative complications. Procedure effectiveness was defined as blood pressure returning to normal levels (systolic blood pressure<140 mmHg (1 mmHg=0.133 kPa) and diastolic blood pressure<90 mmHg), cortisol and 24 h UFC returning to normal and improvement of clinical characteristics. The parameters were monitored during follow up in the outpatient department at 1, 3, 6, and 12 months after catheter-based adrenal ablation. Results: A total of 12 patients (aged (40.0±13.2) years) were reviewed. There were 5 males, with 5 cases of adenoma and 7 with hyperplasia from imaging studies. Catheter-based adrenal ablation was successful in all without interruption or surgical conversion. No postoperative complication including bleeding, puncture site infection, adrenal artery rupture or adrenal bleeding was observed. The mean follow up was 28 months. Compared to baseline values, body weight declined to (59.48±11.65) kg from (64.81±10.75) kg (P=0.008), fasting blood glucose declined to (4.54±0.83) mmol from (5.53±0.99) mmol (P=0.044), outpatient systolic blood pressure declined to (128±21) mmHg from (140±19) mmHg (P=0.005), diastolic blood pressure declined to (78±10) mmHg from (86±11) mmHg (P=0.041), and the mean ambulatory daytime diastolic blood pressure declined to (79±12) mmHg from (89±8) mmHg (P=0.034). Catheter-based adrenal ablation in 8 patients was defined as effective with their 24 h UFC significantly reduced after the procedure (1 338.41±448.06) mmol/L from (633.66±315.94) mmol/L, P=0.011). The change of 24 h UFC between the effective treatment group and ineffective group was statistically significant (P=0.020). The postoperative systolic blood pressure in the treated adenoma group was significantly lower than those of hyperplasia group (112±13) mmHg vs. (139±20) mmHg, P=0.026). Conclusions: For patients with CS-associated hypertension who are unwilling or unable to undergo surgical treatment, catheter-based adrenal ablation could improve the blood pressure and cortisol level. Catheter-based adrenal ablation could be a safe, effective, and minimally invasive therapy. However, our results still need to be validated in further large-scale studies.
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Affiliation(s)
- Z C Yan
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - N Jiang
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - H X Zhang
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - Q Zhou
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - X L Liu
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - F Sun
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - R M Yang
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - H B He
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - Z G Zhao
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
| | - Z M Zhu
- Department of Hypertension and Endocrinology, Center for Hypertension and Cardiometabolic Diseases, Daping Hospital, Army Medical University, Chongqing Institute of Hypertension, Chongqing 400042, China
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Peng ZH, Yan ZC. [The status of projects funded in division of preventive medicine in National Natural Science Foundation of China from the financial year 2007-2021]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:852-860. [PMID: 35785869 DOI: 10.3760/cma.j.cn112150-20220309-00215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
It is of great significance to analyze the configuration of programs funded by the National Natural Science Foundation of China using funding data in the field of preventive medicine from 2007 to 2021. The analysis mainly focused on the funding status of the program, funding amount, funded institutions and personnel. A total of 5 349 programs in the discipline of preventive medicine were funded over the last 15 years. The funding amount in this discipline accounted for a relatively low proportion in the total funding amount of the Department of Medical Sciences and this proportion also showed a decreasing trend. Non-infectious disease epidemiology, human nutrition, and health toxicology were the top three subdisciplines of all funded programs in preventive medicine. The proportion of programs led by young scholars was gradually rising over the years, and young scholars were playing an increasingly influential role in scientific research. The funding status among each subdiscipline and institution also varied. The results of this study reflected the thriving of preventive medicine. Meanwhile, some problems and dilemmas were also revealed in its current development. Hopefully, this study could provide valuable information for institutions and preventive medicine researchers to apply for National Natural Science Foundation, and promote the long-term development of preventive medicine in the future.
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Affiliation(s)
- Z H Peng
- School of Public Health, Nanjing Medical University, Nanjing 211166, China Department of Health Science, National Natural Science Foundation of China, Beijing 100085, China
| | - Z C Yan
- Department of Health Science, National Natural Science Foundation of China, Beijing 100085, China
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Zhu ZM, Zhao ZG, Zhang HX, He HB, Yan ZC. [Adrenal ablation therapy for primary aldosteronism related resistant hypertension: key technology and clinical application perspectives]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:951-956. [PMID: 34674432 DOI: 10.3760/cma.j.cn112148-20210616-00517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z M Zhu
- Department of Hypertension and Endocrinology, Center for Hypertension and Metabolic Diseases, Daping Hospital, Army Medical University, Chongqing Key Laboratory for Cardiometabolic Diseases,Chongqing 400042, China
| | - Z G Zhao
- Department of Hypertension and Endocrinology, Center for Hypertension and Metabolic Diseases, Daping Hospital, Army Medical University, Chongqing Key Laboratory for Cardiometabolic Diseases,Chongqing 400042, China
| | - H X Zhang
- Department of Hypertension and Endocrinology, Center for Hypertension and Metabolic Diseases, Daping Hospital, Army Medical University, Chongqing Key Laboratory for Cardiometabolic Diseases,Chongqing 400042, China
| | - H B He
- Department of Hypertension and Endocrinology, Center for Hypertension and Metabolic Diseases, Daping Hospital, Army Medical University, Chongqing Key Laboratory for Cardiometabolic Diseases,Chongqing 400042, China
| | - Z C Yan
- Department of Hypertension and Endocrinology, Center for Hypertension and Metabolic Diseases, Daping Hospital, Army Medical University, Chongqing Key Laboratory for Cardiometabolic Diseases,Chongqing 400042, China
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Zhang H, Yan ZC, Chen Q, Qi ZG, Feng Y, Liu HZ, Li XY, Wang WM. Corrosion comparison of free and roller surfaces of Fe 70Si 8B 12Nb 10 amorphous ribbon. RSC Adv 2021; 11:32085-32094. [PMID: 35495509 PMCID: PMC9041945 DOI: 10.1039/d1ra05747b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/11/2021] [Indexed: 11/23/2022] Open
Abstract
The corrosion resistance of the free surface (FS) and roller surface (RS) of Fe70Si8B12Nb10 amorphous ribbon was systematically compared in simulated seawater (0.6 M NaCl). The electrochemical method and scanning electron microscopy showed that the FS corrosion resistance was higher than that of the RS. XPS etching and Mott–Schottky tests indicated that the passivation films on the FS and RS were divided into outer and inner layers. In the spinning process, the elements with a higher atomic mass tend to segregate toward the FS, while the elements with a lower atomic mass segregate toward the RS. These results provide data that can be used to improve the quality of melt spinning ribbons and to optimize the manufacturing of involved electric devices. The two surfaces of the Fe70Si8B12Nb10 amorphous ribbon have very different corrosion resistances due to different structures.![]()
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Affiliation(s)
- H Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
| | - Z C Yan
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
| | - Q Chen
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
| | - Z G Qi
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
| | - Y Feng
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
| | - H Z Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
| | - X Y Li
- Qingdao Yunlu Advanced Materials Technology Company Limited Qingdao 266232 China +86-531-8839-2749
| | - W M Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University Jinan 250061 China
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Lai WH, Wang H, Zheng L, Jiang Q, Yan ZC, Wang L, Yoshikawa H, Matsumura D, Sun Q, Wang YX, Gu Q, Wang JZ, Liu HK, Chou SL, Dou SX. General Synthesis of Single-Atom Catalysts for Hydrogen Evolution Reactions and Room-Temperature Na-S Batteries. Angew Chem Int Ed Engl 2020; 59:22171-22178. [PMID: 32697410 DOI: 10.1002/anie.202009400] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Indexed: 11/11/2022]
Abstract
Herein, we report a comprehensive strategy to synthesize a full range of single-atom metals on carbon matrix, including V, Mn, Fe, Co, Ni, Cu, Ge, Mo, Ru, Rh, Pd, Ag, In, Sn, W, Ir, Pt, Pb, and Bi. The extensive applications of various SACs are manifested via their ability to electro-catalyze typical hydrogen evolution reactions (HER) and conversion reactions in novel room-temperature sodium sulfur batteries (RT-Na-S). The enhanced performances for these electrochemical reactions arisen from the ability of different single active atoms on local structures to tune their electronic configuration. Significantly, the electrocatalytic behaviors of diverse SACs, assisted by density functional theory calculations, are systematically revealed by in situ synchrotron X-ray diffraction and in situ transmission electronic microscopy, providing a strategic library for the general synthesis and extensive applications of SACs in energy conversion and storage.
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Affiliation(s)
- Wei-Hong Lai
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China.,College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.,Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
| | - Heng Wang
- School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, No. 19 Yuquan Road, Beijing, 100049, China
| | - Quan Jiang
- State Key Laboratory of Radiation Medicine and Protection, Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou, 215123, China.,Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Zi-Chao Yan
- Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
| | - Lei Wang
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Hirofumi Yoshikawa
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Daiju Matsumura
- Quantum Beam Science Center (Japan) Atomic Energy Agency, Sayo-gun, Hyogo, 679-5148, Japan
| | - Qiao Sun
- State Key Laboratory of Radiation Medicine and Protection, Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou, 215123, China
| | - Yun-Xiao Wang
- Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
| | - Qinfen Gu
- Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, Victoria, 3168, Australia
| | - Jia-Zhao Wang
- Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
| | - Hua-Kun Liu
- Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
| | - Shu-Lei Chou
- Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
| | - Shi-Xue Dou
- Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia
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Lei YJ, Yan ZC, Lai WH, Chou SL, Wang YX, Liu HK, Dou SX. Tailoring MXene-Based Materials for Sodium-Ion Storage: Synthesis, Mechanisms, and Applications. ELECTROCHEM ENERGY R 2020. [DOI: 10.1007/s41918-020-00079-y] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Zeng Z, Huang Y, Zhu L, Chen Z, Yuan ZJ, Zeng H, Sun DF, Wang Z, Yan ZC. 172 Effects of net energy levels on feed intake pattern and growth performance of growing-finishing gilts monitored using a computerized feed intake recording system. J Anim Sci 2019. [DOI: 10.1093/jas/skz258.361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
This study evaluated the effects of dietary net energy concentrations on feeding behavior and growth performance of growing-finishing pigs monitored using a feed intake recording equipment (FIRE). Two hundred and sixteen (48.8 ± 5.6 kg) gilts were blocked by bodyweight and assigned randomly to 1 of 3 dietary treatments, which included low (2,350 kcal/kg), medium (2,450 kcal/kg), and high (2,550 kcal/kg) dietary NE levels. Pigs were housed in 18 pens for 68 d in four phases with 12 pigs and one FIRE station per pen. Bodyweight, feed consumption, and the amount of time and visit at the station of individual pigs were monitored every day by using FIRE. Pigs fed low NE diet spent more time (min) at the station during the first two weeks and visited the station more times with fewer amounts of time (min) per visit after two weeks compared with pigs fed medium and high levels of NE diets (P < 0.05). The speed (g/min) and amount (g/visit) of feed intake were lower (P < 0.05) during phase 3 and the overall period in low NE diet compared with pigs fed medium NE diet. Pigs fed medium NE diet tended to have a greater (P = 0.066) average daily feed intake at phase 4 than pigs fed low NE diet. Increasing NE levels linearly improved (P < 0.05) average daily gain, feed conversion ratio, and final BW during phase 3 and the overall period. However, the overall energy efficiency (Mcal NE/ kg gain) was linearly decreased with increasing NE levels. In conclusion, decreasing dietary NE to 2350 Mcal/kg resulted in more visits to feeders with slow ingestion speed compared with pigs fed diets with 2450 or 2550 Mcal/kg NE. Increasing dietary NE levels linearly improved daily gain and feed conversion ratio, but linearly decreased energy efficiency.
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Affiliation(s)
| | - YaKuan Huang
- Swine research institution, New Hope Liuhe Co., Ltd
| | - Liqiang Zhu
- Swine research institution, New Hope Liuhe Co., Ltd
| | - Zhiyuan Chen
- Swine research institution, New Hope Liuhe Co., Ltd
| | - Z J Yuan
- Swine research institution, New Hope Liuhe Co., Ltd
| | - H Zeng
- Swine research institution, New Hope Liuhe Co., Ltd
| | - D F Sun
- Swine research institution, New Hope Liuhe Co., Ltd
| | - Z Wang
- Swine research institution, New Hope Liuhe Co., Ltd
| | - Z C Yan
- Swine research institution, New Hope Liuhe Co., Ltd
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Zhang ZC, Dou D, Wang XY, Xie DH, Yan ZC. [Analysis of the application and funding projects of National Natural Science Foundation of China in the field of burns and plastic surgery from 2010 to 2016]. Zhonghua Shao Shang Za Zhi 2017; 33:65-67. [PMID: 28219137 DOI: 10.3760/cma.j.issn.1009-2587.2017.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We analyzed the data of application and funding projects of the National Natural Science Foundation of China (NSFC) during 2010-2016 in the field of burns and plastic surgery and summarized the NSFC funding pattern, the research hotspots, and weaknesses in this field. The NSFC has funded 460 projects in the field of burns and plastic surgery, with total funding of RMB 227.96 million. The scientific issues involved in the funding projects include orthotherapy against malformations, wound repair, basic research of burns, skin grafting, scars prevention, and regeneration of hair follicle and sweat glands. The research techniques involved in the funding projects are diversified. NSFC plays an important role in the scientific research and talents training in the field of burns and plastic surgery.
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Affiliation(s)
- Z C Zhang
- Department of Critical Care Medicine, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
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Gao J, Chen L, He YY, Yan ZC, Zheng XJ. Degradation of imidazolium-based ionic liquids in aqueous solution using plasma electrolysis. J Hazard Mater 2014; 265:261-270. [PMID: 24394620 DOI: 10.1016/j.jhazmat.2013.11.060] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 11/13/2013] [Accepted: 11/30/2013] [Indexed: 06/03/2023]
Abstract
A novel method of degrading imidazolium-based ionic liquids (ILs) in wastewater using plasma electrolysis (PE) was proposed. The advantage of the PE method was that the ILs acted as both pollutant and electrolyte in the system. Results indicated that ILs with initial concentrations of 1.0-4.0g/100mL readily decomposed under an applied voltage of 600V within 120min. The anion and alkyl chain lengths of the ILs, discharge time, and post-treatment time were also found to be significant, and the degradation could be described by pseudo-first-order kinetics. Moreover, the energy efficiency of PE for degradation was calculated. The energy yield was generally higher than 2.0g/kWh, which is approximately 100 times that of the degradation of methyl orange. The oxygen atom, hydroxyl radicals, and hydrogen peroxide produced by PE were important in the oxidation and cleavage of the ILs, and the degradation pathway of the imidazolium-based ILs was investigated using IC, FT-IR, NMR, and GC-MS techniques.
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Affiliation(s)
- J Gao
- Department of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - L Chen
- Department of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Y Y He
- Department of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Z C Yan
- Department of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China.
| | - X J Zheng
- Department of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
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Abstract
Adsorbent made from sewage sludge is used to remove the Cr (VI) in wastewater. In this paper, the adsorption capacity, adsorption mechanism and regeneration of the adsorbent are studied. A systematic research is carried out to investigate the influence of adsorption capacities in various conditions, such as contact time, pH and initial dosage of adsorbent. The results show that: the equilibrium time is 6 h; the optimal pH is 2.5. The adsorption capacity increases as the initial concentration increase and as the dosage of activated carbon decrease. The data of adsorption capacity are more fit in Langmuir isotherms. The adsorption follows a pseudo-second-order kinetic model perfectly. From this research, the adsorption rate controlling step is film diffusion when the Cr (VI) concentration is low; otherwise, the adsorption rate controlling step is the diffusion among particles. The results of regeneration of saturated adsorbent show that the saturated adsorbent can be perfectly regenerated using alkali treatment. The regeneration ratio of the saturated adsorbent can reach more than 90% with proper concentration of alkali.
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Affiliation(s)
- L Y Deng
- Harbin Institute of Technology, Harbin 150090, China
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Xu GR, Yan ZC, Wang YC, Wang N. Recycle of Alum recovered from water treatment sludge in chemically enhanced primary treatment. J Hazard Mater 2009; 161:663-669. [PMID: 18486332 DOI: 10.1016/j.jhazmat.2008.04.008] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 04/02/2008] [Accepted: 04/02/2008] [Indexed: 05/26/2023]
Abstract
An investigation was made to study the feasibility of recovering the Alum from coagulation sludges and reusing it in chemically enhanced primary treatment (CEPT) process to make the CEPT more cost-effective and recover the resource (Alum) efficiently. The optimum condition and efficiency of the acidification method for Alum recovery from coagulation sludge were investigated in the test. The results show that when the recovery rate of Alum reaches its highest level, 84.5%, the reduction rate of sludge is 35.5%. It turns out that the capability of recovered coagulant to remove turbidity, UV(254) and COD are 96%, 46% and 53%, respectively. The results prove that the recovered coagulants could be used in CEPT and the efficiency of recovered coagulant to remove pollutants is similar to that of fresh coagulant. Although some substances will be enriched during recycle, they have little effect on the quality of treated wastewater. The experiments verify that it would be an advisable and cost-effective way to recover Alum from coagulation sludges in water treatment and chemical wastewater treatment, and it could be then recycled to CEPT as well as reduce sludge volume.
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Affiliation(s)
- G R Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, P.O. Box 2602, 202 Haihe Road, Nangang District, Harbin, Heilongjiang Province, Postal code 150090, China.
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12
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Xu GR, Yan ZC, Wang N, Li GB. Ferric coagulant recovered from coagulation sludge and its recycle in chemically enhanced primary treatment. Water Sci Technol 2009; 60:211-219. [PMID: 19587418 DOI: 10.2166/wst.2009.318] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An investigation was conducted to study the feasibility of ferric coagulant recovery from chemical sludge and its recycle in chemically enhanced primary treatment (CEPT) to make the process more cost-effective, as well as reduce sludge volume. The optimum conditions and efficiency of the acidification for ferric coagulant recovery from coagulation sludge were investigated. Experimental results showed that the recovered coagulants can be used in CEPT and the pollutants removal efficiency is similar to that of fresh coagulant, and for some aspects the effect of recovered coagulants is better than that of fresh ones, such as turbidity removal. Although some substances will be enriched during recycle, they have little effect on treated wastewater quality. Acidification condition also had significant influence on reduction of sludge volume. The efficiency of coagulant recovery had a linear relationship with sludge reduction. Experiments verify that it would be a sustainable and cost-effective way to recover ferric coagulant from coagulation sludge in water treatment and chemical wastewater treatment, and then recycle it to CEPT, as well as reduce sludge volume.
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Affiliation(s)
- G R Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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Yan ZC. Calculations of magnetic moments for three-electron atomic systems. Phys Rev Lett 2001; 86:5683-5686. [PMID: 11415332 DOI: 10.1103/physrevlett.86.5683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2001] [Indexed: 05/23/2023]
Abstract
The first fully correlated calculations of the magnetic moment in lithium are presented. Relative to the free-electron value, the Zeeman gJ factor for the ground state lithium gJ/g(e)-1 is calculated to a computational accuracy of 200 parts in 10(9), including relativistic and radiative corrections of orders alpha2, alpha2m/M, and alpha3. The isotope shifts in gJ are predicted precisely for various isotopes. The extensions to the first excited S state of lithium and the ground state of Be+ are made.
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Affiliation(s)
- Z C Yan
- Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3
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Cote R, Jamieson MJ, Yan ZC, Geum N, Jeung G, Dalgarno A. Enhanced cooling of hydrogen atoms by lithium atoms. Phys Rev Lett 2000; 84:2806-2809. [PMID: 11018947 DOI: 10.1103/physrevlett.84.2806] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/1999] [Revised: 02/04/2000] [Indexed: 05/23/2023]
Abstract
We present calculated scattering lengths for collisions between various isotopic forms of lithium and hydrogen atoms interacting via singlet and triplet molecular states of LiH. We demonstrate that one bound triplet level is supported for each isotopomer 7LiH, 6LiH, 7LiD, and 6LiD. We obtain large calculated triplet scattering lengths that are stable against uncertainties in the potential. We present elastic and momentum transfer cross sections, and the corresponding rate coefficients, for hydrogen atoms colliding with 7Li atoms. We suggest that enhanced cooling of trapped atomic hydrogen by 7Li atoms is feasible.
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Affiliation(s)
- R Cote
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
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Yan ZC, Babb JF, Dalgarno A, Drake GW. Variational calculations of dispersion coefficients for interactions among H, He, and Li atoms. Phys Rev A 1996; 54:2824-2833. [PMID: 9913796 DOI: 10.1103/physreva.54.2824] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16
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Zhang T, Yan ZC, Drake GW. QED Corrections of O(mc2 alpha 7 ln alpha ) to the Fine Structure Splittings of Helium and He-like Ions. Phys Rev Lett 1996; 77:1715-1718. [PMID: 10063153 DOI: 10.1103/physrevlett.77.1715] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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17
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Yan ZC, McKenzie DK, Drake GW. Variational calculations of the Fermi contact term for the 2 2S, 2 2P, and 3 2S states of Li and the 2 2S state of Be+. Phys Rev A 1996; 54:1322-1327. [PMID: 9913596 DOI: 10.1103/physreva.54.1322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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18
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Yan ZC, Drake GW. Eigenvalues and expectation values for the 1s22s 2S, 1s22p 2P, and 1s23d 2D states of lithium. Phys Rev A 1995; 52:3711-3717. [PMID: 9912676 DOI: 10.1103/physreva.52.3711] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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20
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Drake GW, Yan ZC. Asymptotic-expansion method for the evaluation of correlated three-electron integrals. Phys Rev A 1995; 52:3681-3685. [PMID: 9912671 DOI: 10.1103/physreva.52.3681] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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21
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Yan ZC, Goovaerts E, Bouwen A, Borghs G. Photoluminescence of the electron-dressed confined X- exciton in an n-type AlAs/GaAs resonant tunneling device. Phys Rev B Condens Matter 1995; 52:5907-5912. [PMID: 9981780 DOI: 10.1103/physrevb.52.5907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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23
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Yan ZC. High-precision calculation of the isotope shift in the ratio gJ(3He, 2 (3)S1)/gJ(4He, 2 (3)S1). Phys Rev A 1994; 50:3809-3811. [PMID: 9911348 DOI: 10.1103/physreva.50.3809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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24
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Yan ZC, Drake GW. High-precision calculations of the Zeeman effect in the 2 3PJ, 2 1P1, 2 3S1, and 3 3PJ states of helium. Phys Rev A 1994; 50:R1980-R1983. [PMID: 9911214 DOI: 10.1103/physreva.50.r1980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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25
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Drake GW, Yan ZC. Energies and relativistic corrections for the Rydberg states of helium: Variational results and asymptotic analysis. Phys Rev A 1992; 46:2378-2409. [PMID: 9908396 DOI: 10.1103/physreva.46.2378] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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26
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Gien TT, Yan ZC. Erratum: Elastic and inelastic electron and positron scatterings from metastable hydrogen. Phys Rev A 1991; 43:1636. [PMID: 9905196 DOI: 10.1103/physreva.43.1636.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Gien TT, Yan ZC. Elastic and inelastic electron and positron scatterings from metastable hydrogen. Phys Rev A 1990; 42:3121-3124. [PMID: 9904384 DOI: 10.1103/physreva.42.3121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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