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| 1 | Polytitanium sulfate(PTS):Coagulation application and Ti species detection显示文摘Interest in the development of inorganic polymerized coagulants is growing; however, there are only limited studies on the synthesis of polytitanium coagulants, which are expected to exhibit improved coagulation efficiency with better floc properties. This study presents the synthesis of polytitanium sulfate(PTS) for potential application in water purification,followed by characterization of PTS flocs and titanium species detection. Stable PTS solutions were successfully synthesized and standard jar tests were conducted to evaluate their coagulation efficiency. Electrospray ionization time-of-flight mass spectrometry(ESI-TOF-MS) speciation analysis revealed that a variety of mononuclear and polynuclear complexes were formed in PTS solution, indicating the polymeric nature of the synthesized coagulant. Floc characteristics were studied through on-line monitoring of floc size using a laser diffraction particle size analyzer. Results showed that PTS had a comparable or in some cases even higher organic matter and particulate removal efficiency than Ti(SO_4)_2.The effluent p H after PTS coagulation significantly improved toward desirable values closer to neutral p H. Properties of flocs formed by PTS were significantly improved in terms of floc size, growth rate and structure. This study showed that PTS could be an efficient and promising coagulant for water purification, with the additional benefit that its coagulated sludge can be used to recover valuable TiO_2 nanoparticles for various commercial applications. | Yanxia Zhao Sherub Phuntsho Baoyu Gao Hokyong Shon | 2017 | Journal of Environmental Sciences2017，29，2： | 4 |
| 2 | 不丹的黑颈鹤:种群现状和保护显示文摘黑颈鹤(Grus nigricollis)在世界自然保护联盟濒危物种红色名录中被列为“易危”物种,在不丹也同样受法律保护。不丹是重要的、也是除中国之外的最大黑颈鹤越冬地。黑颈鹤在不丹的越冬期为5个月,越冬区域为不丹的中部(Phobjilka,Khotokha和Gyetsa)和东部(Bumdeling)。不丹的黑颈鹤同步统计工作始于1986-1987年冬季,调查地点包括了最主要的几个越冬区,如不丹中部的Phobjikha和Khotokha以及东部的Bumdeling。调查工作由不丹皇家自然保护学会和林业部(现为林业和公园服务部)发起。从1986-1987冬季开始,至2013-2014冬季(共28个越冬期),同步调查结果表明平均每年的越冬黑颈鹤数量为415只1。在1986-1987冬季,黑颈鹤数量仅为370只,但在2013-2014年冬季调查中,黑颈鹤数量已达550只,增长率高达48.6%2。在28年中,平均每年的种群增长率为1.73%,或者说每年会增加6只黑颈鹤。在过去的两个半世纪中,不丹的黑颈鹤数量一直在稳步增加。但是除了Phobjikha山谷地区的黑颈鹤数量在逐步增长以外,其他几个地点,如Bumthang、Bumdeling和Khotokha的数量却在减少,尤其是在20世纪90年代初之后。整体来看,在黑颈鹤统计数量最多的那一年,共550只,幼鹤数量为63只,幼体新增率为11.4%。最引人注目的保护工作是Phobjikha和Bumdeling两地均已晋升为保护地,其中Phobjikha为保护区,而Bumdeling falls(位于Bumdeling野生动物庇护所)则成为了国际重要湿地。Khotokha和Bumdeling一样,也在2012年成为了国际重要湿地。在Bumthang地区的Thangbi falls(位于Ugyen Wangchuck Centennial Park),黑颈鹤同样受到了有效保护。在这些地区,黑颈鹤受到的主要威胁是人类经济发展导致的对自然环境的破坏。今后的保护计划主要包括生境恢复、生境和捕猎研究、宣教项目、环志研究等。“可持续民生发展项目”也已在Phobjikha和Bumdeling实施,其中在Phobjikha的项目尤其备受关注。在法律层面上,针对黑颈鹤的保护政策日趋完善,而在社会文化中,民众一直视黑颈鹤为“LhaBja”,即“天堂之鸟”,这些均保证了黑颈鹤会得到最好的保护。 | Tshering Phuntsho Jigme Tshering | 2014 | Zoological Research2014，35，S01： | 3 |
| 3 | Impact of land cover change on a mountain ecosystem and its services:case study from the Phobjikha valley,Bhutan显示文摘Introduction:Mountains occupy 24%of the global land surface and are home to 12%of the world’s population;they host the world’s principal biomes and supply a diverse array of ecosystem services.But they are also highly sensitive to both natural and human induced changes,which can affect service provision meant for one third of humanity.Systematic research on impacts of land cover change from mountains at the local scale are limited,especially in developing countries,which poses a barrier to informed planning for sustainable management.Bhutan being in the forefront as contributor towards global conservation goals,a case study following a systematic research framework considering quantitative,qualitative and geospatial tools was experimented.Outcome:Respondents identified and ranked 24 ecosystem services,among which the provisioning services were the most important,followed by cultural,regulating,and supporting services.Forest was the most important land cover type for services,followed by marsh,scrub,water bodies,and agriculture.The area of forest declined by 2%and marsh by 7%over the 32-year period,suggesting a potential decrease in ecosystem services,which was also observed by the local community.Discussion:It was observed that 80%of the local people are still directly dependent on the diverse ecosystems for services.Though subtle,the decrease in land cover has implications for livelihoods of the people and the rich biodiversity of the area.Aspiring communities for local development needs guidance for identifying trade-offs in land cover types in sustainable management.An integrated and holistic approach focusing on both conservation and community development should be used to manage and develop the valley and the region sustainably.Conclusion:We recommend diversifying the limited livelihood strategies(potato farming and livestock grazing)to reduce the potential vulnerability of the local community and reduce the pressure on forest and marsh.Proper land use planning in the valley would be beneficial to maintain and regulate land uses in an effective way and avoid possible conflicts between settlement,agriculture,forest,and marsh. | Sunita Chaudhary Dago Tshering Tshering Phuntsho Kabir Uddin Bandana Shakya Nakul Chettri | 2017 | Ecosystem Health and Sustainability2017，3，9： | 2 |
| 4 | Membrane scaling and flux decline during fertilizer-drawn forward osmosis desalination of brackish groundwater显示文摘 | Phuntsho S Lotfi F Hong S | 2014 | Water Research2014，57，： | 1 |
| 5 | Nanofiltration for water and wastewater treatment-a mini review显示文摘 | Shon H K Phuntsho S Chaudhary D S | 2013 | Drinking Water Engineering and Science Discussions2013，6，1： | 1 |
| 6 | Pilot-scale nanofil- tration system as post-treatment for fertilizer-drawn for- ward osmosis desalination for direct fertigation 显示文摘 | Kim J E Phuntsho S Shon H K | 2013 | Desal Water Treat2013，51，： | 1 |
| 7 | Forward os- mosis desalination of brackish groundwater: Meeting water quality requirements for fertigation by integrating nanofiltration显示文摘 | Phuntsho S Hong S Elimelech M etal | 2013 | J Membr Sci2013，436，： | 1 |
| 8 | Boron transport through polyamide-based thin film composite forward osmosis membranes显示文摘 | Fam W Phuntsho S Lee J H | 2014 | Desalination2014，340，： | 1 |
| 9 | Blended Fertilizers as Draw Solutions for Fertilizer-Drawn Forward Osmosis Desalination显示文摘 | Sherub Phuntsho HoKyong Shon etc | 2012 | Environmental Science and Technology2012，3，： | 1 |
| 10 | Osmotic equilibrium in the forward osmosis process: Modelling, experiments and implications for process performance 显示文摘 | S Phuntsho S k Hong M Elimelech | 2014 | Journal of Membrane Science2014，41，3： | 1 |
| 11 | Osmotic e- quilibrium in the forward osmosis process: Modelling, experiments and implications for process performance 显示文摘 | Phuntsho S Hong S Elimelech M | 2014 | J Membr Sci2014，453，： | 1 |
| 12 | Blended fertilizers as draw solutions for fertilizer-drawn forward osmosis desalination显示文摘 | Phuntsho S Shon H K Majeed T | 2012 | Environ Sci Technol2012，46，8： | 1 |
| 13 | A novel low energy fertilizer driven forward osmosis desalination for direct fertigation: Evaluating the performance of fertilizer draw solutions显示文摘 | Sherub Phuntsho Ho Kyong Shon Seungkwan Hong Sangyoup Lee Saravanamuthu Vigneswaran | 2011 | Journal of Membrane Science 3752011，，： | 1 |
| 14 | A novel low energy fertilizer driven forward osmosis desalination for direct fertigation:Evaluating the performance of fertilizer draw solutions显示文摘 | Phuntsho S Shon H K | 2011 | J Membr Sci2011，375，： | 1 |
| 15 | In-fluence oftemperature and temperature difference in theperformance of forward osmosisdesalination process显示文摘 | Phuntsho S Vigneswaran S Kandasamy J | 2012 | J Membr Sci2012，，： | 1 |
| 16 | A review of draw solutes in forward osmosis process and their use in modem applications显示文摘 | Chekli L Phuntsho S Shon H K | 2012 | Desalination and Water Treatment2012，43，13： | 1 |
| 17 | Effect of photocatalysis on the membrane hybrid system for wastewater treatment显示文摘 | Shon H Phuntsho S Vigneswaran S | 2008 | Desalination2008，225，： | 1 |
| 18 | Fertiliser drawn forward osmosis desalination:the concept,performance and limitations for fertigation显示文摘 | Phuntsho S Shon H K Hong S | 2012 | Reviews in Environmental Science and Bio/Technology2012，11，2： | 1 |
| 19 | A novel low energy fertilizer driven forward osmosis desalination for direct fertigation:evaluating the performance of fertilizer draw solutions显示文摘 | Phuntsho S Shon H K Hong S K | 2011 | Journal of Membrane Science2011，375，12： | 1 |
| 20 | Influence of temperature and temperature difference in the performance of forward osmosis desalination process显示文摘 | Sherub Phuntsho Saravanamuthu Vigneswaran Jaya Kandasamy Seungkwan Hong Sangyoup Lee Ho Kyong Shon | 2012 | Journal of Membrane Science2012，，： | 1 |
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