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Assessment of the Effectiveness of Potassium Polyacrylate on Crop Production 认领
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作者 Yélézouomin Stéphane Corentin Somé Diakalya Traoré +2 位作者 Malicki Zoromé Pounyala Awa Ouoba Dapola Evariste Constant Da 《农业化学和环境(英文)》 2021年第1期113-123,共11页
Water control is a major problem in crop production, particularly in fragile ecosystems such as the Sahel. Water is the most important factor in plant productivity. Many initiatives have been developed in this directi... Water control is a major problem in crop production, particularly in fragile ecosystems such as the Sahel. Water is the most important factor in plant productivity. Many initiatives have been developed in this direction, including all methods of irrigation and water and soil conservation. The objective of this work is to assess the effectiveness of this amendment in crop production in the context of climate variability. The methodology is based on experi<span>mentation to statistically compare the natural biomass on a soil of sil</span><span>ty-clay-sandy texture, divided into two blocks, one of which is amended with potassium polyacrylate and the other is not. This study showed that the wet and dry biomasses produced on soils with potassium polyacrylate are significantly higher than those produced on unamended soils at the 5% threshold. Based on these results, potassium polyacrylate may be a solution to recurrent dryness pockets. However, uncontrolled environmental testing is necessary to confirm these results.</span> 展开更多
关键词 Water Management Plant Production Potassium Polyacrylate OUAGADOUGOU
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煤矿探放水施工问题分析及优化应用 认领
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作者 梁振宏 《能源与节能》 2021年第1期135-136,共2页
为了防止煤矿水害事故发生,保证煤矿安全生产,针对当前煤矿防治水工作效率低、难度大等问题,山西煤炭运销集团阳城大西煤业有限公司通过技术研究,分析了井下探放水施工主要存在的问题,并根据实际生产情况,提出了若干项对策措施,通过实... 为了防止煤矿水害事故发生,保证煤矿安全生产,针对当前煤矿防治水工作效率低、难度大等问题,山西煤炭运销集团阳城大西煤业有限公司通过技术研究,分析了井下探放水施工主要存在的问题,并根据实际生产情况,提出了若干项对策措施,通过实际应用,取得了显著应用成效。 展开更多
关键词 煤矿 探放水 水害事故 生产安全
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涂装车间节水方案企划与实施 认领
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作者 孙加勇 勾天生 +1 位作者 李彬 彭金涛 《涂料工业》 CAS CSCD 北大核心 2021年第4期47-51,共5页
某涂装车间在现有节水措施的基础上,通过企划与实施--系列新的技术及精益管理措施,如,磷化出槽喷淋工艺优化、纯水制水率提升、空调冷凝水回用率提升、中水深度处理回用、用水分级管理等,将新鲜水用量从15.2L/m2降至11.3L/m2,达... 某涂装车间在现有节水措施的基础上,通过企划与实施--系列新的技术及精益管理措施,如,磷化出槽喷淋工艺优化、纯水制水率提升、空调冷凝水回用率提升、中水深度处理回用、用水分级管理等,将新鲜水用量从15.2L/m2降至11.3L/m2,达到涂装行业清洁生产评价指标体系(2016版)中的I级标准12L/m2要求,处于国内领先水平。 展开更多
关键词 涂装车间 节水 清洁生产中图分类号:U468
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生物炭基催化剂电催化分解水制氢 认领
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作者 高立 应芝 +4 位作者 黄亚军 俞潇远 刘芯妤 何长春 张成 《功能材料》 CAS CSCD 北大核心 2021年第2期2009-2017,共9页
近年来低成本的生物炭材料被用于电解水催化剂,对此展开综述。首先介绍电解水制氢基本原理及生物炭基催化剂的制备,再分析炭化温度、活化、杂原子掺杂、金属和/或金属化合物的负载对催化剂微观组成、性质及其催化活性的影响,以期为高效... 近年来低成本的生物炭材料被用于电解水催化剂,对此展开综述。首先介绍电解水制氢基本原理及生物炭基催化剂的制备,再分析炭化温度、活化、杂原子掺杂、金属和/或金属化合物的负载对催化剂微观组成、性质及其催化活性的影响,以期为高效电解水制氢的生物炭基催化剂的制备提供参考。最后为提高电解过程中催化剂的长期稳定性、尤其OER和中性电解液下的催化活性,指出未来可在生物质原料的挑选、催化剂的电子结构调控及制备方法优化、理论计算指导4个方面做出努力。 展开更多
关键词 生物炭 电催化剂 制备方法 电解水 制氢
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矿井水水文地质研究及水害防治对策研究 认领
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作者 康世欣 《当代化工研究》 2021年第4期59-60,共2页
鉴于矿井突水事故为仅次于瓦斯事故影响煤矿安全生产的关键威胁源,以14123工作面为例在分析其基本岩层特性的基础上,注重对其水文地质条件进行详细分析尤其是对其矿井水含水层的参数进行定量分析,为后续防治水措施的制动提供依据;最后,... 鉴于矿井突水事故为仅次于瓦斯事故影响煤矿安全生产的关键威胁源,以14123工作面为例在分析其基本岩层特性的基础上,注重对其水文地质条件进行详细分析尤其是对其矿井水含水层的参数进行定量分析,为后续防治水措施的制动提供依据;最后,针对14123工作面地表水和井下水害的防治提出具体对策,为进一步保证其安全生产奠定基础。 展开更多
关键词 涌水量 水文地质 注浆加固 主要含水层 安全生产
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采用碳水足迹评价中国与哈萨克斯坦大豆机械化生产模式 认领
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作者 楚天舒 赖世宣 +1 位作者 韩鲁佳 杨增玲 《农业工程学报》 EI CAS CSCD 北大核心 2021年第3期312-319,共8页
农业生产已进入机械化生产时代,定量评价作物机械化生产的环境影响、水资源消耗、生产效率等已成为迫切需要解决的问题。该研究以中国黑龙江垦区和哈萨克斯坦阿拉木图州的大豆机械化生产模式为例,从碳足迹、水足迹和产量3个方面对大豆... 农业生产已进入机械化生产时代,定量评价作物机械化生产的环境影响、水资源消耗、生产效率等已成为迫切需要解决的问题。该研究以中国黑龙江垦区和哈萨克斯坦阿拉木图州的大豆机械化生产模式为例,从碳足迹、水足迹和产量3个方面对大豆的机械化进行分析与评价生产模式。研究结果表明:中国黑龙江垦区下属嫩江农场大豆机械化生产的碳足迹、水足迹和大豆产量分别为0.51 kg/kg、1.82 m3/hm2和2875 kg/hm2,哈萨克斯坦阿拉木图州阿曼格迪农场分别为0.52 kg/kg、2.76 m3/hm2和2000 kg/hm2。相较于嫩江农场,阿曼格迪农场大豆机械化生产的碳足迹高2.08%,水足迹高51.83%,大豆产量低30.43%。因此,阿曼格迪农场未来大豆机械化生产需以节水增产为重要发展目标。结合实际生产情况,更新与配套大豆机械化生产的各类农机具、推广节水灌溉技术、建立大豆机械化生产作业规范,有助于提升哈萨克斯坦大豆机械化生产水平。该研究可为多角度评价不同区域作物机械化生产模式提供案例参考。 展开更多
关键词 机械化 碳排放 水资源消耗 大豆 生产模式
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文章速递Highly selective electrocatalytic Cl− oxidation reaction by oxygen-modified cobalt nanoparticles immobilized carbon nanofibers for coupling with brine water remediation and H2 production 认领
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作者 Qizhong Xiong Xian Zhang +5 位作者 Qipeng Cheng Guoqiang Liu Gang Xu Junli Li Xinxin Ye Hongjian Gao 《纳米研究:英文版》 SCIE EI CSCD 2021年第5期1443-1449,共7页
Combining the H2 production with brine remediation is regarded as a sustainable approach to achieving clean H2 energy. However, designing stable Cl− oxidation reaction (COR) electrocatalyst is the key to realize this ... Combining the H2 production with brine remediation is regarded as a sustainable approach to achieving clean H2 energy. However, designing stable Cl− oxidation reaction (COR) electrocatalyst is the key to realize this route. Herein, a type of oxygen-modified Co nanoparticles anchored graphitic carbon nanofibers catalyst (Co/GCFs) was synthesized through a two-step strategy of adsorption and pyrolysis. The Co/GCFs-2.4 exhibits high selectivity and stability for COR at neutral electrolyte. It is worth noting that unlike the water oxidation, the chemical valence of cobalt has not changed during the COR. Further results demonstrated that the oxygen-modified Co nanoparticles provide active sites for selective COR, meanwhile, the graphitic carbon gives rise to strong catalytic stability. Thanks to the superior COR and H2 production activity of Co/GCFs-2.4, a two-electrode brine electrocatalysis system employing Co/GCFs-2.4 as both cathode and anode for H2 production exhibited robust stability, efficient and high Faraday efficiency (98%-100%). We propose that this work provides a novel strategy for designing efficient and stable catalysts with electrocatalytic COR and HER activities at neutral brine water for practically coupling with H2 production by water electrolysis and brine water remediation. 展开更多
关键词 carbon nanofibers oxygen-modified cobalt nanoparticles brine water Cl−oxidation reaction electrocatalytic H2 production
文章速递Numerical simulation-based correction of relative permeability hysteresis in water-invaded underground gas storage during multi-cycle injection and production 认领
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作者 ZHU Sinan SUN Junchang +4 位作者 WEI Guoqi ZHENG Dewen WANG Jieming SHI Lei LIU Xianshan 《石油勘探与开发:英文版》 CSCD 2021年第1期190-200,共11页
By conducting relative permeability experiments of multi-cycle gas-water displacement and imbibition on natural cores,we discuss relative permeability hysteresis effect in underground gas storage during multi-cycle in... By conducting relative permeability experiments of multi-cycle gas-water displacement and imbibition on natural cores,we discuss relative permeability hysteresis effect in underground gas storage during multi-cycle injection and production.A correction method for relative permeability hysteresis in numerical simulation of water-invaded gas storage has been worked out using the Carlson and Killough models.A geologic model of water-invaded sandstone gas storage with medium-low permeability is built to investigate the impacts of relative permeability hysteresis on fluid distribution and production performance during multi-cycle injection and production of the gas storage.The study shows that relative permeability hysteresis effect occurs during high-speed injection and production in gas storage converted from water-invaded gas reservoir,and leads to increase of gas-water transition zone width and thickness,shrinkage of the area of high-efficiency gas storage,and decrease of the peak value variation of pore volume containing gas,and then reduces the storage capacity,working gas volume,and high-efficiency operation span of the gas storage.Numerical simulations exhibit large prediction errors of performance indexes if this hysteresis effect is not considered.Killough and Carlson methods can be used to correct the relative permeability hysteresis effect in water-invaded underground gas storage to improve the prediction accuracy.The Killough method has better adaptability to the example model. 展开更多
关键词 water-invaded gas reservoir underground gas storage multicycle injection-production relative permeability hysteresis model-based correction index prediction
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Efficiency of Aluminium and Copper Coated Aluminium Electrode in Hydrogen Fuel Generation from Rain Water 认领
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作者 Md. Khalid Saklin Rajib Chandra Das +4 位作者 Yeasmin Akther Sanchita Dewanjee Sujan Kanti Das Tania Sabnam Binta Monir Susmita Mondal 《能源与动力工程(英文)》 2020年第6期348-356,共9页
Water electrolysis is considered as the most capable and old technology for <span style="font-family:Verdana;">hydrogen fuel preparation. Electrolysis needs external electrical energy through </span... Water electrolysis is considered as the most capable and old technology for <span style="font-family:Verdana;">hydrogen fuel preparation. Electrolysis needs external electrical energy through </span><span style="font-family:Verdana;">electrodes to split water into hydrogen and oxygen. An efficient electrolysis requires suitable electrodes to minimize potential drop. In this study Aluminium and Copper Coated Aluminium were used as different combination of Anodes and Cathodes to find out more efficient electrodes combination. NaCl solution in rain water was taken as electrolyte. Rain water was taken to avoid ionic impedance of tap water and expenses of distilled water. In this study, the most efficient electrode combination was Copper Coated Aluminium (anode)</span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Aluminium (cathode) and gave the highest efficiency of hydrogen production to about 11% at normal temperature for very low concentration of NaCl (0.051</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">M) which increased with temperature, up to 29% upon rising of temp to 60<span style="font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;">&#176</span></span></span></span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">C. It was showed that higher concentration of electrolyte would surge the efficiency significantly. If the supplied heat could be provided from any waste heat sources then this study would be more efficient. However, current research evaluated the technical feasibility of this electrode combination for producing hydrogen with electrolysis of rain water utilizing electricity and modified electrodes.</span></span>< 展开更多
关键词 Hydrogen Production ELECTROCHEMISTRY Water Electrolysis Copper Coated Aluminum Rain Water
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Nutrient Removal Structures Using Locally-Sourced Iron and Aluminum By-Products Reduce Nutrient Runoff from Broiler Production Facilities 认领
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作者 Sheri L. Herron Andrew N. Sharpley +1 位作者 Kristofor R. Brye James M. Burke 《环境保护(英文)》 2020年第4期332-343,共12页
A common issue with filters designed to remove nutrients from runoff is their reduced effectiveness in high-flow conditions. To overcome this challenge, it was determined that nutrient removal from broiler-house fan d... A common issue with filters designed to remove nutrients from runoff is their reduced effectiveness in high-flow conditions. To overcome this challenge, it was determined that nutrient removal from broiler-house fan dust could be more effective if nutrient removal was conducted at the nutrient source. The objective of this study was to evaluate the effectiveness of containment trays (CTs) holding locally sourced by-products installed adjacent to broiler house fans at the University of Arkansas Savoy broiler production facility to capture nutrients released from dust during rainfall over four years (2013 to 2017). By-products used were locally sourced, iron-based red mud (RM) generated during the manufacture of steel belts for tires and alum-based drinking water treatment residual (WTR), where both materials have large phosphorus (P) sorption capacities. Four-year mean annual concentrations of dissolved P of through-flow from RM CTs were consistently below 0.7 mg·L-1 and below 1.6 mg·L-1 for WTR CT through-flow. This equated to an average 11- and 4-fold decrease for RM and WTR, relative to concentrations in runoff from same-sized plots adjacent to sidewall fans, demonstrating their potential to trap P at the source and decrease P runoff to nearby flowing waters. While there was no significant decline in RM or WTR effective-ness over the four-year study, further work needs to be conducted to determine the lifespan of CTs. Use of RM and WTR in CTs at poultry broiler production facilities, along with their subsequent land application, has the potential to reduce the amount of by-product materials that are currently landfilled. 展开更多
关键词 Nitrogen RUNOFF Phosphorus RUNOFF POULTRY Production Red MUD WATER Quality WATER Treatment Residual
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Development and prospect of separated zone oil production technology 认领
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作者 LIU He ZHENG Lichen +4 位作者 YANG Qinghai YU Jiaqing YUE Qingfeng JIA Deli WANG Quanbin 《石油勘探与开发:英文版》 2020年第5期1103-1116,共14页
This article outlines the development of separated zone oil production in foreign countries,and details its development in China.According to the development process,production needs,technical characteristics and adap... This article outlines the development of separated zone oil production in foreign countries,and details its development in China.According to the development process,production needs,technical characteristics and adaptability of oilfields in China,the development of separate zone oil production technology is divided into four stages:flowing well zonal oil production,mechanical recovery and water blocking,hydraulically adjustable zonal oil production,and intelligent zonal production.The principles,construction processes,adaptability,advantages and disadvantages of the technology are introduced in detail.Based on the actual production situation of the oilfields in China at present,three development directions of the technology are proposed.First,the real-time monitoring and adjustment level of separated zone oil production needs to be improved by developing downhole sensor technology and two-way communication technology between ground and downhole and enhancing full life cycle service capability and adaptability to horizontal wells.Second,an integrated platform of zonal oil production and management should be built using a digital artificial lifting system.Third,integration of injection and production should be implemented through large-scale application of zonal oil production and zonal water injection to improve matching and adjustment level between the injection and production parameters,thus making the development adjustment from"lag control"to"real-time optimization"and improving the development effect. 展开更多
关键词 separated zone oil production flowing well zonal oil production mechanical recovery and water plugging hydraulically adjustable zonal oil production intelligent zonal oil production PROSPECT
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高义钢铁有限公司高速线材项目水资源论证取用水合理性分析 认领
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作者 王瑶 《山西水利科技》 2020年第4期56-59,共4页
山西高义钢铁有限公司2×100万t高速线材项目生产用水取水水源为新绛县污水处理厂再生水,生活用水取水水源为新绛县供水公司公共用水。取用新鲜水量80.88万m3/a,其中生产用水78.95万m3/a,生活用水1.93万m3/a。该项目生产用水和生活... 山西高义钢铁有限公司2×100万t高速线材项目生产用水取水水源为新绛县污水处理厂再生水,生活用水取水水源为新绛县供水公司公共用水。取用新鲜水量80.88万m3/a,其中生产用水78.95万m3/a,生活用水1.93万m3/a。该项目生产用水和生活用水符合山西省用水定额要求,也符合山西省水资源配置的总体思路,生产和生活取水水源可靠、用水合理。 展开更多
关键词 生活用水 生产用水 高速线材 取水水源 再生水
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基于核磁共振T2谱储层产水率测井评价技术 认领
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作者 李振林 李戈理 +3 位作者 程道解 郭常伟 邸淑华 李琴 《测井技术》 CAS 2020年第1期67-72,共6页
前人基于油水相渗实验数据建立了多种评价储层产水率的方法,大都基于大量实验分析数据,在分析数据缺乏的新探区,所计算的产水率精度较低,不能满足生产需求。为满足连续高精度计算需要,提出基于核磁共振T2谱的油水两相流产水率计算模型... 前人基于油水相渗实验数据建立了多种评价储层产水率的方法,大都基于大量实验分析数据,在分析数据缺乏的新探区,所计算的产水率精度较低,不能满足生产需求。为满足连续高精度计算需要,提出基于核磁共振T2谱的油水两相流产水率计算模型。该方法在毛细管束模型的基础上,考虑储层的不同尺寸孔径组分对储层各相流体渗流的贡献,并综合考虑储层束缚水、残余油的赋存形式,建立数学模型。通过油水相渗实验资料刻度关键参数,最终建立反映储层静态特征的“伪油水相渗曲线”及“伪产水率计算曲线”,进而实现储层产水率的计算。该方法在LX地区新井流体性质识别及产能预测中进行了应用,取得了显著效果。 展开更多
关键词 测井解释 产水率 核磁共振T2谱 油水相渗 束缚水饱和度
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粮食生产水足迹动态演变及分解效应 认领 被引量:1
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作者 徐依婷 穆月英 《华南农业大学学报:社会科学版》 CSSCI 北大核心 2020年第3期70-83,共14页
基于水足迹方法构建粮食生产水资源匹配指数,从用水总量、来源结构和粮水匹配关系三个方面分析粮食生产用水的动态演变特征,并采用LMDI模型将粮食生产用水变动分解为9类效应,研究结果表明:粮食生产水足迹变动经历小幅下降——快速回升... 基于水足迹方法构建粮食生产水资源匹配指数,从用水总量、来源结构和粮水匹配关系三个方面分析粮食生产用水的动态演变特征,并采用LMDI模型将粮食生产用水变动分解为9类效应,研究结果表明:粮食生产水足迹变动经历小幅下降——快速回升——企稳上升三个阶段,粮水匹配度较差且矛盾趋于激化。从分解效应看,三产结构调整和节水技术进步是减少粮食生产用水的主要因素,但种植结构调整以及用水效率改善未发挥预期节水效果,粮水匹配关系恶化、水土资源贫乏及二者匹配度较差均不利于缓解农业用水压力。 展开更多
关键词 水足迹 粮食生产 水资源 节水技术进步
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煤层气井储层气水产出互补性及提产措施探讨 认领
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作者 胡海洋 赵凌云 陈捷 《煤矿安全》 CAS 北大核心 2020年第6期191-195,共5页
为提高煤层气井的产气量,需尽量扩大煤储层的有效压降半径。通过分析煤层气井排采过程中产水产气的互补性变化规律,以贵州多煤层开发井组和山西单一煤层开发区块为例,分析产水对产气的影响,提出煤层气井提产增效的对策。结果表明:煤层... 为提高煤层气井的产气量,需尽量扩大煤储层的有效压降半径。通过分析煤层气井排采过程中产水产气的互补性变化规律,以贵州多煤层开发井组和山西单一煤层开发区块为例,分析产水对产气的影响,提出煤层气井提产增效的对策。结果表明:煤层气井见套压前后气水产出比发生变化,具有明显的互补性变化规律;单一煤层及多煤层开发的煤层气井均发现压裂液返排率越高,总产气量和平均产气量越高;受地层能量和渗透率的影响,煤层气井压裂液返排率随埋深的变化出现转折,转折深度为该井区煤层气井合适的压裂深度;为尽量扩大煤层气井的有效压降半径,应尽量减小排采过程中的渗透率伤害,避免煤粉颗粒对孔裂隙通道的堵塞。 展开更多
关键词 煤层气井 储层 压裂液 产水 产气 互补性 返排率
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户用多效太阳能苦咸水蒸馏器产水特性研究 认领 被引量:1
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作者 侯静 李瑞晨 +1 位作者 朱国鹏 常泽辉 《可再生能源》 CAS 北大核心 2020年第4期453-457,共5页
工业化太阳能苦咸水淡化装置占地面积大、初始投资高,难以应用于分布式户用苦咸水淡化过程。文章设计了一种户用多效太阳能苦咸水蒸馏器,该蒸馏器具有占地面积小、低品位热能驱动、运行简单等特点,可以实现分布式制备淡水。文章在实际... 工业化太阳能苦咸水淡化装置占地面积大、初始投资高,难以应用于分布式户用苦咸水淡化过程。文章设计了一种户用多效太阳能苦咸水蒸馏器,该蒸馏器具有占地面积小、低品位热能驱动、运行简单等特点,可以实现分布式制备淡水。文章在实际天气条件下,测试了由平板太阳能集热器供能的户用多效太阳能苦咸水蒸馏器的产水速率,研究了该蒸馏器蒸发冷凝温度的变化情况,以及竖直方向冷凝温度梯度的分布情况。研究结果表明,晴天稳态运行时,户用多效太阳能苦咸水蒸馏器内蒸发冷凝温差的最大值约为22℃,沿竖直方向第一效冷凝套筒的冷凝温差约为9.8℃,该蒸馏器的最大产水速率为23.53 g/min,可以满足偏远地区小型户用淡水的制备需求。 展开更多
关键词 苦咸水蒸馏 产水速率 太阳能 户用 多效
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Responses of Amygdalus pedunculata Pall.in the sandy and loamy soils to water stress 认领
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作者 PEI Yanwu HUANG Laiming +1 位作者 SHAO Ming'an ZHANG Yinglong 《干旱区科学:英文版》 SCIE CSCD 2020年第5期791-805,共15页
Amygdalus pedunculata Pall.is a major species that is widely planted in afforested soils with different textures in the transitional zone between Mu Us Desert and Loess Plateau,China.However,the responses of A.peduncu... Amygdalus pedunculata Pall.is a major species that is widely planted in afforested soils with different textures in the transitional zone between Mu Us Desert and Loess Plateau,China.However,the responses of A.pedunculata to increasing intensity of water stress in different textural soils are not clear.Here,we conducted a soil column experiment to evaluate the effects of different textures(sandy and loamy)on water consumption,water use efficiency(WUE),biomass accumulation and ecological adaptability of A.pedunculata under increasing water stress,i.e.,90%(±5%)FC(field capacity),75%(±5%)FC,60%(±5%)FC,45%(±5%)FC and 30%(±5%)FC in 2018.A.pedunculata grown in the sandy soil with the lowest(30%FC)and highest(90%FC)water contents had respectively 21.3%-37.0%and 4.4%-20.4%less transpiration than those with other water treatments(45%-75%FC).In contrast,A.pedunculata transpiration in the loamy soil decreased with decreasing water content.The magnitude of decrease in transpiration increased with increasing level of water deficit(45%and 30%FC).Mean daily and cumulative transpirations of the plant were significantly lower in the sandy soil than in the loamy soil under good water condition(90%FC),but the reverse was noted under water deficit treatments(45%and 30%FC).Plant height,stem diameter and total biomass initially increased with decreasing water content from 90%to 75%FC and then declined under severe water deficit conditions(45%and 30%FC)in the sandy soil.However,these plant parameters decreased with decreasing water content in the loamy soil.WUE in the sandy soil was 7.8%-12.3%higher than that in the loamy soil,which initially increased with decreasing water content from 90%to 75%FC and then declined under water deficit conditions(45%and 30%FC).The study showed that plant transpiration,biomass production and WUE responded differentially to increasing intensity of water stress in the sandy and loamy soils.The contrasting responses of A.pedunculata to water stress in different textural soils can guide future revegeta 展开更多
关键词 soil texture water consumption biomass production water use efficiency Loess Plateau
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干湿交替灌溉对水稻生产和温室气体减排影响研究进展 认领
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作者 张鲜鲜 周胜 +2 位作者 孙会峰 张继宁 王从 《生态学杂志》 CAS CSCD 北大核心 2020年第11期3873-3880,共8页
水稻生产消耗了大量淡水资源,同时也是温室气体的重要排放源。水分管理是影响稻田温室气体排放的关键因子,干湿交替灌溉(AWD)作为一种重要的稻田节水减排管理模式,在中国、菲律宾、越南和印度等一些亚洲国家广为应用。本文综述了AWD管... 水稻生产消耗了大量淡水资源,同时也是温室气体的重要排放源。水分管理是影响稻田温室气体排放的关键因子,干湿交替灌溉(AWD)作为一种重要的稻田节水减排管理模式,在中国、菲律宾、越南和印度等一些亚洲国家广为应用。本文综述了AWD管理模式对稻田温室气体减排和其他生态效益(节水潜力、水稻产量等)影响的研究进展。总体而言,AWD可显著降低甲烷(CH4)排放,但较大幅度增加了氧化亚氮(N2O)排放,因此,其综合温室气体减排效果取决于N2O增加幅度。水分管理耦合肥料管理,如优化肥料施入种类和方式等,有利于CH4和N2O同时减排。另一方面,AWD设定的土壤水分胁迫阈值影响水稻产量,轻度水分胁迫(土壤水势阈值-15±5 kPa)可在降低灌溉水量的同时保持水稻稳产,而重度水分胁迫(土壤水势阈值-30±5 kPa)时水稻产量显著降低。AWD稻田土壤通气性较好,利于微生物活动,一定程度上促进了土壤有机物质的分解。科学合理地发展节水高效的水稻生产模式,有利于降低生产成本,增加农民经济收益。 展开更多
关键词 水分管理 干湿交替灌溉 水稻生产 温室气体减排 水分胁迫阈值
电容膜吸附技术在火电厂间接空冷循环水系统的应用 认领
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作者 刘政修 李刚 +6 位作者 王斌 毛永清 于海琴 李朝辉 庞昊 张睿琪 杨超 《全面腐蚀控制》 2020年第10期36-41,共6页
电容膜吸附技术具有操作及维护简便、设备寿命长、能耗低、回收率高、无二次污染等优势,近几年来开始应用于污(废)水回用处理领域。以河北涿州京源热电有限责任公司间接空冷循环水系统中主机循环冷却水为处理对象,通过改变电容膜吸附装... 电容膜吸附技术具有操作及维护简便、设备寿命长、能耗低、回收率高、无二次污染等优势,近几年来开始应用于污(废)水回用处理领域。以河北涿州京源热电有限责任公司间接空冷循环水系统中主机循环冷却水为处理对象,通过改变电容膜吸附装置操作条件,试验研究电导率、pH、钠离子、总硬度、总铁、铝离子浓度六个指标与处理电流的关系,探究电容膜吸附中试装置在处理主机循环冷却水时的最佳工况。试验结果表明:电容膜吸附中试装置处理主机循环水的最优电流为17A,在预处理时间30s、吸附时间420s、排污时间120s情况下,产水率为93.4%,电导率由8.12μS/cm最低降至0.9μS/cm(平均为3μS/cm),各离子去除率与操作电流大小基本呈正相关,其中钠离子与钙、镁离子去除率高于铝离子与铁离子。 展开更多
关键词 主机循环水 电容膜吸附技术 出水水质 产水率 操作条件
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我国西北地区主要农作物贸易对区域水资源影响 认领 被引量:2
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作者 韩昕雪琦 安婷莉 +2 位作者 高学睿 王玉宝 吴普特 《南水北调与水利科技(中英文)》 CAS 北大核心 2020年第1期82-97,共16页
随着我国粮食生产重心的北移,西北地区在全国粮食安全中的作用日益凸显,然而该地区水资源缺乏,水土资源时空匹配性差对当地的生态安全、粮食安全和水安全构成了巨大威胁。近些年,伴随着城市化和区域贸易的快速发展,西北地区农作物产量... 随着我国粮食生产重心的北移,西北地区在全国粮食安全中的作用日益凸显,然而该地区水资源缺乏,水土资源时空匹配性差对当地的生态安全、粮食安全和水安全构成了巨大威胁。近些年,伴随着城市化和区域贸易的快速发展,西北地区农作物产量和外运量均快速增长,大量的农作物虚拟水伴随贸易输送到全国各地,进一步加剧了西北地区的水资源压力,严重制约当地的可持续发展。基于此,本研究对2000-2015年西北地区主要农作物生产水足迹和伴随着农产品贸易的虚拟水流动格局进行了量化分析,在此基础上评估了西北地区农产品贸易输出引发的水资源压力。结果表明,研究期内2000-2015年西北地区主要农作物生产水足迹呈上升趋势,从2000年的417.16亿m^3增长到2015年的439.87亿m^3。与此同时,农产品贸易伴生的虚拟水流动量显著增加,从2000年的220亿m^3增长到2015年的272.99亿m^3,严重加剧了当地的水资源压力。陕西、内蒙古、新疆和甘肃水资源压力均高于全国平均水平,陕西更是呈重度水资源压力状态。因此,本文从技术发展和宏观战略层面提出了创新农业实体水资源利用效率、建立虚拟水补偿机制以及合理优化调整区域产业结构的应对策略与建议,为保障我国西北地区水资源可持续利用提供了科学参考。 展开更多
关键词 水足迹 虚拟水 可持续性评价 西北地区 作物生产
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