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Experimental optimization and mathematical modeling of supercritical carbon dioxide extraction of essential oil from Pogostemon cablin

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2407-2417页

作者： kangning xiong Yun Chen Shuai Shen Department of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China

The supercritical carbon dioxide extraction was applied to obtain essential oil from Pogostemon cablin in this *** of extraction parameters including temperature,pressure,extraction time and particle size on extraction yield was investigated,and the response surface methodology with a Box–Behnken Design was used to achieve the optimized extraction *** maximum yield of essential oil was 2.4356%under the conditions of extraction temperature 47°C,pressure 24.5 MPa and extraction time 119 ***,based on the Brunauer–Emmett–Teller theory of adsorption,a mathematical modeling was performed to correlate the measured *** model shows a function relationship between extraction yield and time by a simple equation with three significantly adjustable *** model parameters have been optimized through simulated annealing *** predicted data from the mathematical model show a good agreement with the experimental data of the different extraction parameters.

关键词： Supercritical carbon dioxide extraction Pogostemon cablin Response surface methodology Mathematical modeling Simulated annealing algorithm

不同海拔花椒叶片-凋落物养分化学计量与重吸收的关系

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生态学杂志 2024年第3期43卷 749-757页

作者：邓雪花喻阳华熊康宁张仕豪孔令伟贵州师范大学喀斯特研究院/国家喀斯特石漠化防治工程技术研究中心贵阳550001

阐明贵州喀斯特高原峡谷区不同海拔顶坛花椒叶片和凋落物化学计量特征与养分重吸收率,有助于掌握养分保存与利用机制。选取531、640、780、871和1097 m共5个海拔的顶坛花椒为对象,采集叶片和凋落物数据,分析其养分含量、化学计量和养分... 详细信息

阐明贵州喀斯特高原峡谷区不同海拔顶坛花椒叶片和凋落物化学计量特征与养分重吸收率,有助于掌握养分保存与利用机制。选取531、640、780、871和1097 m共5个海拔的顶坛花椒为对象,采集叶片和凋落物数据,分析其养分含量、化学计量和养分重吸收率随海拔增加的分异规律,阐明叶片养分重吸收与化学计量之间的内在关联。结果表明:叶片和凋落物有机碳(OC)、全磷(TP)和全铁(TFe)均以海拔780 m为最高,叶片全锰(TMn)、全镁(TMg)和凋落物TMg含量表现出随海拔升高而增加的趋势,叶片和凋落物全氮(TN)、全钾(TK)、全钙(TCa)未随海拔发生显著分异。叶片和凋落物C∶P、Fe∶Mn、C∶Ca随海拔升高表现出先增加后降低的变化趋势,而叶片和凋落物Ca∶Mg则呈现随海拔升高而降低。叶片养分重吸收率随海拔的分异规律不完全一致,叶片P和K重吸收率以海拔780 m为最高,N、Fe和Mn重吸收率以海拔871 m为最高,海拔1097 m的Ca和Mg重吸收率显著高于其他海拔,而海拔1097 m的P、N和Fe重吸收率则均为负值。冗余分析结果表明,叶片养分重吸收率与化学计量之间具有很强的相关性。

关键词：顶坛花椒化学计量养分重吸收海拔喀斯特石漠化区

Measurements and correlation of liquid–liquid equilibrium data for the ternary(methyl tert-butyl ketone + o, m, p-benzenediol + water)system at(333.2, 343.2 and 353.2) K

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Chinese Journal of Chemical Engineering 2019年第4期27卷 905-911页

作者： kangning xiong Shuai Shen Youchang Wang Yun Chen State Key Laboratory of Pulp and Paper Engineering Department of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA

In this work, liquid–liquid equilibria(LLE) data for the ternary system methyl tert-butyl ketone(MTBK)+ o, m,p-benzenediol + water were investigated at 333.2 K, 343.2 K and 353.2 K under 101.3 kPa. The performance of MTBK to extract o, m, p-benzenediol from wastewaters was estimated by partition coefficients and separation factors. The Hand and Bachman equations were both applied to check the reliability of the experimental LLE data. Furthermore, the Non-Random Two-Liquid(NRTL) and Universal Quasi Chemical(UNIQUAC) models were applied to correlate the measured LLE data. The results showed a good agreement with the determined ternary LLE data with the root-mean-square error(RMSE) values below 0.71%. MTBK was proved to be a promising extracting agent in extracting benzenediols from effluents.

关键词： Liquid–liquid equilibrium Methyl tert-butyl ketone Benzenediol NRTL model UNIQUAC model

Differential metabolome landscape of Kadsura coccinea fruit tissues and potential valorization of the peel and seed tissues

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BIOCELL 2022年第1期46卷 285-296页

作者： JIANFEI GAO kangning xiong WEIJIE LI WEI ZHOU Institute of Mountain Resources Guizhou Academy of SciencesGuiyang550001China School of Karst Science Guizhou Normal UniversityState Engineering Technology Institute for Karst Desertfication Control of ChinaGuiyang550001China Guizhou Industry Polytechnic College Guiyang550008China

Kadsura coccinea(Lem.)is a woody wine plant with a peculiar fruit enriched in important health-promoting *** non-editable part of the fruit,i.e.,the seed and peel,represents more than 60%of the fruit and is considered a *** significantly restricts the development of the *** fruit *** the metabolic components of the different fruit parts can help to improve the utilization rate and valorization of ***,we evaluated *** fruit peel,pulp,and seed using widely-targeted metabolomics and quantified a set of 736 bioactive compounds from 11 major metabolite *** most prominent metabolite classes included lipids,amino acids,flavonoids,and ***,our results emphasized a significant accumulation of flavonoids in pulp tissues,while alkaloids and lignans were abundant in peel and seed tissues,respectively.A total of 183 metabolites were differentially accumulated among the three *** C2,rutinoside,2-hydroxyoleanolic acid,5-hydroxymethyluracil,nootkatol,isoquercitrin,isohyperoside,quercetin-7-O-glucoside,hyperin,and rutin showed elevated accumulation in the *** the seed,kadsuralignan G,kadcoccilactone A,kadsuralignan H,lysoPE 20:5,iso-schisandrin ethyl alcohol,and kadangustin were significantly *** results highlight the diverse metabolome composition of *** fruit parts,which can be further exploited for its valorization in various industries.

关键词： Kadsura coccinea Widely-targeted metabolomics Alkaloids Lignans Flavonoids Fruit Biowaste valorization

Salt effect on the liquid–liquid equilibrium of the ternary (water + phenol + methyl isobutyl ketone) system: Experimental data and correlation

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Chinese Journal of Chemical Engineering 2019年第1期27卷 168-173页

作者： Yun Chen kangning xiong Shuai Shen Huimin Wang Shaoming Zhou Libo Li Department of Chemistry and Chemical Engineering South China University of Technology State Key Laboratory of Pulp and Paper Engineering South China University of Technology

The effects of NaCl, KCl and Na_2SO_4 on the liquid–liquid equilibrium(LLE) data for the ternary system, water+ phenol + methyl isobutyl ketone, were determined at 0.101 MPa and 333.15 K and 343.15 *** nonrandom two-liquid(NRTL) model was used to correlate the experimental data and to yield corresponding binary interaction parameters for these salt containing *** Hand and Othmer–Tobias equations were used to confirm the dependability of the determined LLE data in this *** coefficient and selectivity were used to evaluate the extraction performance of methyl isobutyl ketone with the existence of *** magnitude of salt effect on the water + phenol + methyl isobutyl ketone(MIBK) system is in the following order: Na_2SO_4>NaCl>KCl.

关键词： Liquid-liquid equilibrium Methyl isobutyl ketone Salt effect Phenol

生态产品价值实现与乡村振兴协同机制与模式研究

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环境经济研究 2024年第3期9卷 30-42页

作者：赵榕熊康宁刘肇军陈起伟贵州师范大学喀斯特研究院 550001 贵州师范大学喀斯特研究院国家喀斯特石漠化防治工程技术研究中心贵州师范学院地理与资源学院 550018

生态产品价值实现与乡村振兴协同,对推动生态文明建设具有重要意义。本研究基于村落生态系统与生态产品价值关系的角度探究生态产品价值实现过程,剖析生态产品价值实现与乡村振兴的协同机制,并结合花江石漠化综合治理实践,提出了二者协... 详细信息

生态产品价值实现与乡村振兴协同,对推动生态文明建设具有重要意义。本研究基于村落生态系统与生态产品价值关系的角度探究生态产品价值实现过程,剖析生态产品价值实现与乡村振兴的协同机制,并结合花江石漠化综合治理实践,提出了二者协同模式。结果表明:村落产品价值实现是在保证生态资产不减少的前提下,通过价值投入与价值交易,实现村落内部人地关系协调、村落外部消费与内部供给良性互馈。村落生态服务资源融合、内生发展动力激活、生态产品体系培育、生态产业功能提升是推动生态产品价值实现与乡村振兴协同的核心机制。花江石漠化综合治理区依托石漠化治理工程,形成了基于生态服务资源融合的生态保护与生态补偿模式、基于生态产品体系培育的生态农林产业链构建模式、基于内生发展动力激活的循环低碳社区建设模式和基于生态产业功能提升的景观开发与乡村旅游模式。本研究有利于深化对喀斯特石漠化治理村落的科学认知,为探索生态产品价值实现路径和推进生态修复区乡村振兴提供理论和实践参考。

关键词：生态产品生态产品价值实现乡村振兴协同机制协同模式

Formation of the Huajiang Grand Canyon (southwestern China) driven by the evolution of a Late Pleistocene tiankeng

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Acta Geochimica 2022年第1期41卷 1-11页

作者： Yunlong Fan Andrea Columbu kangning xiong Guangjie Luo Song Li Xuefeng Wang Yangyang Wu Key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000GansuChina Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed School of Geography and Resource ScienceGuizhou Education UniversityGuiyang 550018GuizhouChina Department of Chemistry Life Sciences and Environmental SustainabilityUniversity of Parma43124 ParmaItaly School of Karst Science Guizhou Normal UniversityGuiyang 550001GuizhouChina Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

Collapse is a common geomorphic process in karst areas,especially on the Yunnan-Guizhou Plateau,which has a tectonic background of integral *** frequent occurrence of collapse processes in karst underground caves and canyons indicates that collapses play an important role in the formation of *** an analysis of the morphology of a semicircular cliff in the Huajiang Grand Canyon and an investigation of sediments at the bottom of the cliff,a large-scale collapse event was found to have occurred.U-series dating of secondary calcium carbonate cement in the collapse breccias indicates that collapse processes occurred approximately 200 *** to the geomorphological evolution of the Huajiang Grand Canyon,the following geomorphic evolutionary process is proposed:underground river-cave hall-collapse of a tiankeng-tiankeng degradation-canyon *** findings also show that the dating of collapsed breccia cement can be effectively used to determine the development times of karst canyons and the formation ages of tiankengs.

关键词： Canyon Cave collapse Tiankeng Karst breccias Yunnan-Guizhou Plateau

Karst environment and public health research countermeasures

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Karst environment and public health research countermeasures

The spatial distribution and factors affecting karst cave development in Guizhou Province

中国生物工程学会第六次全国会员代表大会暨第九届学术年会

作者： Yongkuan Chi kangning xiong Zhenzhen Zhang Institute of South China Karst Guizhou Normal University National Key Lab of Eco-environment of Karst Hillland in Guizhou Province

Objective:The southwest karst area,an area of 550,000 km

关键词： karst environment public health countermeasures

来源： cnki会议评论

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Journal of Geographical Sciences 2017年第8期27卷 1011-1024页

作者： ZHOU Zhongfa ZHANG Shaoyun xiong kangning LI Bo TIAN Zhonghui CHEN Quan YAN Lihui XlAO Shizhen School of Karst Science Guizhou Normal University/State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province Guiyang 550001 China Remote Sensing Center of Guizhou Province Guiyang 550001 China

This research examines the distribution features of 4960 caves across Guizhou Province, while probing the relationship between the caves＇ spatial patterns and geographic elements. This study is based on hydrogeological and topographic maps of Guizhou. ArcGIS software was used to process the adjacent index, spatial analysis, and coupling analysis of the caves altitude and longitude, as well as the rock properties, lithology, drainage and tec- tonic division of almost 5000 caves. Based on a point pattern analysis of Guizhou caves, the adjacent index is 0.53, and the coefficient of variation verified by Tyson polygon reached 72.469%. This figure reflects the clustered distribution pattern of the caves. Across the entire province, caves are divided into four concentrated areas and one weakly affected area. The four concentrated areas are Zunyi-Tongren, Bijie, Qianxinan-Liupanshui, and Gui- yang-Anshun-Qinan. The one weakly affected zone is Qiandongnan. The most concentrated among them is the Guiyang-Anshun-Qiannan area, which covers 24.67% of the total province area, and accounts for 36.63% of the total province＇s caves. Cave distribution in Guizhou is characterized as dense in the western part and sparse in the eastern part. Under this study background, the natural elements of formation, including lithology, structure, climate, hydrol- ogy, and altitude, and their effects on the distribution, number, and spatial pattern of cave development is analyzed.

关键词： karst caves geographic information system spatial pattern affecting factor Guizhou