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Overestimate of remediation efficiency due to residual sodium persulfate in PAHs contaminated soil and a solution

Journal of Environmental Sciences 2022年第3期34卷 242-250页

作者： Liping He Jianhao Tong Yuanqiang Yang Jianxun Wu Linqian Li zhonghua wei wei Long Jingli Pang Jiyan Shi Yunnan Research Academy of Eco-environmental Sciences Kunming 650034China Department of Environmental Engineering College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China Beijing Construction Engineering Group Environmental Remediation Co.Ltd. Beijing 100015China

Oxidation remediation is a commonly used technology for PAHs contaminated soil presently,but the overestimate of efficiency due to ongoing remediation by residual oxidants during extraction and testing has not been paid enough attention.In this study,persulfate was activated by Fe(Ⅱ)to investigate the effects of residual oxidants on PAHs removal during detection process and the elimination effects of adding Na_(2)SO_(3) and extending sampling time on residual oxidants.Results verified that the residual oxidants removed PAHs in extraction process,making the results lower than the actual values:the detection recovery rate η of ΣPAHs and 3-6 ring PAHs ranged from 24.3%(25%Na_(2)S_(2)O_(8)treatment)to 87.4%(5%Na_(2)S_(2)O_(8)+4/4Fe^(2+) treatment),20.1%-99.0%,28.9%-87.9%,20.8%-89.4%,and 1.8.6%-76.9%,respectively.After adding Na_(2)SO_(3),the accuracy of detection results increased significantly:the η of ΣPAHs and 3-6 ring PAHs increased to 64.1%-96.5%,58.8%-95.5%,73.8%-114.4%,60.6%-95.6%,and 45.4%-77.1%,respectively.After 49 days of adding oxidants,residual oxidants had no considerable effect on the detection of PAHs,indicating it was appropriate to start soil remediation verification sampling49 days after the remediation was completed.The observed results will help scientific evaluation of the remediation effects of chemical oxidation on or-ganic contaminated soil.

关键词： Persulfate activation Soil remediation Polycyclic aromatic hydrocarbons Residual oxidant removal

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孔结构对塑性混凝土抗渗性能的影响

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混凝土 2024年第5期 64-66,81页

作者：王进文丁向群尉中华青岛市建筑工程管理服务中心山东青岛266071 沈阳建筑大学材料科学与工程学院辽宁沈阳110168 沈阳军区空军勘察设计院辽宁沈阳110000

掺加膨润土和硅灰、改变水胶比配制了不同孔结构和孔分布的塑性混凝土,并测试了其抗渗性能,研究不同孔结构对塑性混凝土抗渗性能的影响。结果表明:随着水胶比的增大,塑性混凝土中有益孔占比逐渐减少、有害孔占比逐渐增加,平均孔径逐渐增... 详细信息

掺加膨润土和硅灰、改变水胶比配制了不同孔结构和孔分布的塑性混凝土,并测试了其抗渗性能,研究不同孔结构对塑性混凝土抗渗性能的影响。结果表明:随着水胶比的增大,塑性混凝土中有益孔占比逐渐减少、有害孔占比逐渐增加,平均孔径逐渐增大;膨润土、硅灰能够提高塑性混凝土的抗渗性能,增加有益孔减少有害孔,降低平均孔径。

关键词：孔结构塑性混凝土有益孔有害孔平均孔径

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隧道临界稳定断面确定方法及应用

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武汉理工大学学报（交通科学与工程版） 2024年第1期48卷 115-120,126页

作者：李斌尤昭魏中华蓝元盛武汉理工大学交通与物流工程学院武汉430063 湖北省公路工程技术研究中心武汉430063

文中提出一种基于参数化建模和强度折减法的隧道临界稳定断面确定方法.通过定义数值模型的关键点坐标,实现了基于FLAC3D的多心圆断面隧道参数化建模.定义一个尺寸调整系数,为强度折减计算得到的安全系数和安全系数目标值的比值.当尺寸... 详细信息

文中提出一种基于参数化建模和强度折减法的隧道临界稳定断面确定方法.通过定义数值模型的关键点坐标,实现了基于FLAC3D的多心圆断面隧道参数化建模.定义一个尺寸调整系数,为强度折减计算得到的安全系数和安全系数目标值的比值.当尺寸调整系数大于1时,说明计算安全系数大于目标安全系数,隧道开挖断面小于临界稳定断面,可将隧道几何尺寸乘以尺寸调整系数,使得隧道开挖断面等比例扩大;反之,则说明隧道开挖断面大于临界稳定断面,将隧道几何尺寸乘以尺寸调整系数,使得隧道开挖断面等比例缩小.通过FLAC3D内置的FISH语言编程,根据尺寸调整系数,对隧道开挖断面进行等比例调整,直至尺寸调整系数等于1,迭代终止,得到最终临界稳定断面.

关键词：参数化建模临界断面强度折减法安全系数台阶法

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Agricultural Biotechnology 2016年第3期5卷 44-47页

作者： zhonghua wei College of Life Sciences China West Normal University

In this study, beetle communities in Jiuzhaigou, Xiaozhaizigou, Caopo, Ma＇anshan and Baihe nature reserves of Sichuan Province were compared and analyzed. F index, G index and G-F index of beetle communities in five nature reserves were analyzed to calculate the similarity coefficient C between these five na- ture reserves. According to the results, beetle communities exhibited high dissimilarity between Jiuzhaigou and Xiaozhaizigou, Caopo and Jiuzhaigou, Caopo and Xiaozhaizigou, Ma＇anshan and Xiaozhaizigou, Ma＇anshan and Jiuzhaigou, Baihe and Xiaozhaizigou, Baihe and Caopo, Baihe and Ma＇anshan; beetle communities exhibited moderate dissimilarity between Ma＇anshan and Caopo, Baihe and Jiuzhaigou.

关键词： Xiaozhaizigou Jiuzhaigou Caopo Ma＇anshan Baihe Beetle communities G-F index Similarity coefficient C

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A Teratological Specimen of Meristoides grandipennis Fairmaire ( Coleoptera, Chrysomeloidea, Galerucinae) from China

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Agricultural Biotechnology 2016年第2期5卷 46-47页

作者： zhonghua wei College of Life Science West China Normal University Nanchong 637009 China

A teratological specimen of Meristoides grandipennis （ Fairmair, 1859）, from Sichuan, China is described here. Many photographs, detail descriptions and data of the teratoIogical specimen are given in this paper.

关键词： Coleoptera Chrvsomeloidea Teratological specimen China

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A Taxonomic Study of Fasciunculus Species-group(Coleoptera:Buprestoidea:Trachyini)

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Agricultural Biotechnology 2016年第1期5卷 47-49页

作者： zhonghua wei aimin shi College of Life Sciences China West Normal UniversityNanchong 637009China

The genus Trachys Fabricius is the largest genus in tribe Trachyini. There are only six species-groups in genus Trachys. However, most of species are not included. Here, we added four species tofasciunculus species-greup, which made this species more complete. The information of members infasciunculus spe- cies-group was summarized in this paper, which might provide more complete information for taxonomic study of genus Trachys.

关键词： Coleoptera Buprestoidea Trachys fasciunculus specles-group.

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Distribution and Taxonomy of the Subtribe Lagriina (Coleoptera: Tenebrionidae: Lagriini) in China

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Agricultural Biotechnology 2015年第3期4卷 47-50页

作者： zhonghua wei Zhaoshan HU Juan XU Aimin SHI College of Life Sciences China West Normal University

In this paper, the distribution and taxonomy of the subtribe Lagriina in different provinces and regions of China was summarized. According to related data, different species of the subtribe Lagriina mainly distribute in the south of China. To be specific, Yunnan Province owns the greatest number of species, followed by Fujian Province and Sichuan Province. This study laid the theoretical foundation for further investigation of the evolutionary process of the subtribe Lagriina in China.

关键词： Coleoptera Tenebrionidae Lagriini Distribution Taxonomy Statistics China

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Research on the Feeding Habits and Food Range of Periplaneta fuligiosa

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Agricultural Biotechnology 2015年第4期4卷 44-46页

作者： zhonghua wei Mingxia GUO Juan XU Aimin SHI College of Life Science China West Normal University

[ Objective] This study aimed to investigate the feeding habits and food range of Periplanetafuligiosa. [ Method] Common insects, foods, daily necessities, plants and fruits were used to feed P. fuligiosa ; one food or item was put into the culture bottle each time in a small amount, to observe the feeding habits of P. fuligiosa. Foods or items uneaten after three days were excluded from its food range. Subsequently, P. fuligiosa was fed with random combinations of two or more foods according to the food range, to observe and record the feeding order. [Result] P. fuligiosa has a relatively wide food range, which dislikes dead bodies of hard-shelled insects such as Cyrtotrachelus longimanus and Popillia quadriguttata. P. fuligiosa is an omnivorous insect but tends to be carnivorous. [ Conclusion] This study provided the basis for the cultivation, prevention and control of P. fuligiosa.

关键词： Periplanetafuligiosa Food range Preference Feeding

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The Distribution of Tribe Blaptini( Coleoptera,Tenebrionidae) in China

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Agricultural Biotechnology 2015年第2期4卷 59-61页

作者： zhonghua wei Mingxia GUO Zhaoshan HU Juan XU Yuanying FAN Aimin SHI Key Laboratory of Southwest China Wildlife Resources Conservation Institute of Rare Animals & PlantsChina West Normal University

In this paper,the distribution status of genera and species of the tribe Balptini discovered in China was summarized.According to related data,19 genera and 169 species of the tribe Balptini are distributed in various provinces and regions of China.Different genera and species of the tribe Balptini are distributed in different regions.This study laid the theoretical foundation for further investigation of the evolutionary process of tribe Blaptini in China.

关键词： Coleoptera genera tribe evolutionary geographical Hebei Species Liaoning summarized Qinghai

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Finite-time State and Output Feedback Guaranteed Cost Control of Discrete-time Stochastic Systems

Finite-time State and Output Feedback Guaranteed Cost Contro...

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第32届中国控制与决策会议

作者： zhonghua wei Xikui Liu College of Mathematics and Systems Science Shandong University of Science and Technology

This paper is devoted to the problem of state and output feedback finite-time guaranteed cost control for discrete-time stochastic system.We can obtain two sufficient conditions for the existence of state and output feedback controllers by the definition of stochastic finite-time guaranteed cost control.The finite-time stochastic stability of discrete-time closed-loop systems is discussed.Furthermore,the upper bound of quadratic cost function is ensured.Finally,two examples are presented to demonstrate the efficiency of the results.

关键词： Guaranteed cost control Finite-time stability State feedback Output feedback

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