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Phytoremediation for phenanthrene and pyrene contaminated soils

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Journal of Environmental Sciences 2005年第1期17卷 14-18页

作者： GAOYan-zheng ZHULi-zhong DepartmentofEnvironmentalSciences ZhejiangUniversityHangzhou310028China

Phytoremediation of soil contaminated with phenanthrene and pyrene was investigated using twelve plant species. Plant uptake and accumulation of these chemicals were evaluated. At the end of the experiment(45 d), the remaining respective concentrations of soil phenanthrene and pyrene in spiked vegetated soils, with initial phenanthrene of 133 3 mg/kg and pyrene of 171 5 mg/kg, were 8 71—16 4 and 44 9—65 0 mg/kg, generally 4 7%—49 4% and 7 1%—35 9% lower than their concentrations in the non vegetated soils. The loss of phenanthrene and pyrene in vegetated spiked soils were 88 2%—93 0% and 62 3%—73 8% of the added amounts of these contaminants, respectively. Although plant uptake and accumulation of these compounds were evident, and root concentrations and RCFs(root concentration factors; defined as the ratio of PAH concentrations in roots and in the soils on a dry weight basis) of these compounds significantly positively correlated to root lipid contents, plant uptake and accumulation only accounted for less than 0 01% and 0 23% of the enhanced loss of these chemicals in vegetated versus non vegetated soils. In contrast, plant promoted microbial biodegradation was the dominant mechanism of the phytoremediation for soil phenanthrene and pyrene contamination. Results from this study suggested a feasibility of the establishment of phytoremediation for soil PAH contamination.

关键词： phytoremediation phenanthrene pyrene polycyclic aromatic hydrocarbons(PAHs) soil

配体密度控制促进CsPbBr_(3)量子点激子解离与能量转移实现高效CO_(2)光催化还原

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Science Bulletin 2024年第7期69卷 901-912页

作者：钟丰忆盛剑平杜晨宇何烨孙艳娟董帆 School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu 611731China Research Center for Carbon-Neutral Environmental&Energy Technology Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731China

Perovskite quantum dots(PQDs) hold immense potential as photocatalysts for CO_(2) reduction due to their remarkable quantum properties,which facilitates the generation of multiple excitons,providing the necessary high-energy electrons for CO_(2) ***,harnessing multi-excitons in PQDs for superior photocatalysis remains challenging,as achieving the concurrent dissociation of excitons and interparticle energy transfer proves *** study introduces a ligand density-controlled strategy to enhance both exciton dissociation and interparticle energy transfer in CsPbBr_(3) *** CsPbBr_(3) PQDs with the regulated ligand density exhibit efficient photocatalytic conversion of CO_(2) to CO,achieving a 2.26-fold improvement over unoptimized counterparts while maintaining chemical *** analytical techniques,including Kelvin probe force microscopy,temperaturedependent photoluminescence,femtosecond transient absorption spectroscopy,and density functional theory calculations,collectively affirm that the proper ligand termination promotes the charge separation and the interparticle transfer through ligand-mediated interfacial electron coupling and electronic *** work reveals ligand density-dependent variations in the gas-solid photocatalytic CO_(2) reduction performance of CsPbBr_(3) PQDs,underscoring the importance of ligand engineering for enhancing quantum dot photocatalysis.

关键词： Perovskite quantum dots Ligands Photocatalytic CO_(2)reduction Exciton dissociation Electronic coupling

礼治、法治、德治:梁启超群学思想的三个维度

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苏州科技大学学报（社会科学版） 2024年第4期41卷 1-7,107页

作者：钟艳艳卢致远苏州科技大学和合文化研究院江苏苏州215009 苏州科技大学党委保卫部江苏苏州215009

群学思想是梁启超社会变革主张的基石。“群”是道德和政治的共同体,如何实现良好群治是重拾中华民族信心的关键。梳理历史,梁启超将礼治视为治群的初始手段;立足当下,他主张以强化法治精神来弥补礼治的不足;着眼未来,他提倡德治以期建... 详细信息

群学思想是梁启超社会变革主张的基石。“群”是道德和政治的共同体,如何实现良好群治是重拾中华民族信心的关键。梳理历史,梁启超将礼治视为治群的初始手段;立足当下,他主张以强化法治精神来弥补礼治的不足;着眼未来,他提倡德治以期建立一个和谐的世界性“大群”。从过程看,礼治、法治、德治作为三种治理手段贯穿于梁启超群学思想始末。其间,他对“群”的本质、功能及其流变,礼与法的功能及其重点,群德的养成以及公德与私德的新内涵做出系统阐发。最终,梁启超超越了由礼治回护的国家民族主义,走向日臻德境的世界大同。

关键词：梁启超群学礼治法治德治

柴达木盆地北缘西段下石炭统物源和构造背景:来自碎屑岩U-Pb年代学与地球化学的约束

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地质学报 2024年第4期98卷 1056-1067页

作者：胡俊杰施辉马立成马寅生王嘉琦钟畅中国地质科学院地质力学研究所北京100081 自然资源部古地磁与古构造重建重点实验室北京100081 中国地质调查局油气地质力学重点实验室北京100081

为查明柴达木盆地北缘西段早石炭世沉积物来源和构造背景,本次研究采集小赛什腾山怀头他拉组沉积岩进行碎屑岩锆石U-Pb年代学和全岩微量元素地球化学分析。研究表明:测试样品微量元素蛛网图呈平坦型,富Th、U、Hf,贫Co、Sc、Ni、V元素;... 详细信息

为查明柴达木盆地北缘西段早石炭世沉积物来源和构造背景,本次研究采集小赛什腾山怀头他拉组沉积岩进行碎屑岩锆石U-Pb年代学和全岩微量元素地球化学分析。研究表明:测试样品微量元素蛛网图呈平坦型,富Th、U、Hf,贫Co、Sc、Ni、V元素;砂岩轻重稀土元素分馏明显,属轻稀土富集型,具有中等负Eu异常;Cr/Zr、Sm/Nd、Th/Sc及Th/U等微量元素比值和判别图版显示研究区怀头他拉组为上地壳长英质物源区。沉积岩微量元素、稀土元素含量及特征比值显示,研究区样品与大陆弧环境砂岩具有极为相似的地球化学特征,相关构造环境投图同样表明怀头他拉组沉积环境以大陆弧为主,兼有主动大陆边缘特征。怀头他拉组碎屑锆石U-Pb年龄可划分出3个年龄区间,480~402 Ma,1493~900 Ma和1908~1803 Ma。年龄谱呈早古生代单峰值特征,峰值年龄为414 Ma,反映物源区与柴北缘加里东期构造带内早古生代晚期的岩浆作用关系密切。结合前人区域上古地理、古水流证据,综合分析认为小赛什腾山下石炭统怀头他拉组物源主要来自于柴北缘高压—超高压变质带。

关键词：小赛什腾山怀头他拉组地球化学特征碎屑锆石U-Pb年代学构造背景

基于粒子群算法的复杂山区铁路土方调配与取弃土场选址协同优化

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铁道科学与工程学报 2024年第3期21卷 1202-1212页

作者：吕春妍蒲浩宋陶然李伟彭利辉钟晶徐占军中南大学土木工程学院湖南长沙410075 高速铁路建造技术国家工程研究中心湖南长沙410075 中国中铁股份有限公司北京100039 中铁第四勘察设计院集团有限公司湖北武汉430063 湖南中大设计院有限公司湖南长沙410018

复杂山区铁路线路土方调配及取弃土场选址对铁路项目的成本、工期、安全性、环境影响程度等产生长久深远影响,二者之间存在着复杂关联耦合关系。然而,既有方法忽略了上述联系,难以实现铁路线路土方调配与取弃土场选址协同优化。对于复... 详细信息

复杂山区铁路线路土方调配及取弃土场选址对铁路项目的成本、工期、安全性、环境影响程度等产生长久深远影响,二者之间存在着复杂关联耦合关系。然而,既有方法忽略了上述联系,难以实现铁路线路土方调配与取弃土场选址协同优化。对于复杂山区铁路线路,构建了融合调配段落划分点、土方调配量、取弃土场的统一自变量集合,考虑了土方调配、取弃土场选址复杂约束,以土方调配成本、取弃土场建设成本及便道建设成本的综合费用为目标函数,集成综合基础信息子系统、土方调配优化子系统与取弃土场选址优化子系统,建立了土方调配与取弃土场选址的协同优化模型。为求解此协同优化模型,提出一种基于粒子群算法的累进求解策略。首先根据线路划分土方调配段落,进入土方调配优化子系统求得土方调配解,借助移动窗口法构建取弃土场备选池,进入取弃土场选址优化子系统求得取弃土场址解;其次,基于粒子群算法通过更新线路土方调配段落划分来累进迭代寻求最优解。以某复杂山区铁路为例,对铁路线路土方调配及取弃土场选址协同优化模型进行案例验证,与人工方案相比,最终机选最优方案可节省13.77%的综合费用。测试结果表明本方法的有效性,可提高铁路土方调配与取弃土场选址求解效率,为设计人员提供参考。

关键词：铁路线路土方调配取弃土场选址协同优化累进求解算法

Quantum Corrections to the Entropy of a Barriola-Vilenkin Black Hole due to Spin Fields

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Chinese Physics Letters 2000年第6期17卷 396-397页

作者： LI zhong-Heng Department of Physics Zhanjiang Normal CollegeZhanjiang 524048

The radial parts of the gravitational,electromagnetic,neutrino,and massless scalar fields in Barriola-Vilenkin spacetime are transformed to the form of the Teukolsky-type master *** first quantum corrections to the entropy of the black hole due to the spin fields are calculated by using the brick wall *** is shown that the contribution of any one of the spin fields is quadratically divergent at the event horizon and is proportional to the surface area of the event horizon.

关键词： equation. correction transformed

邻苯二甲酸二(2-乙基己基)酯对睾丸的毒性作用及机制

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生物化学与生物物理进展 2024年第3期51卷 555-563页

作者：冯安妮孙任任肖玉波曾昭明莫中成谢远杰桂林医学院基础医学院组织学与胚胎学教研室桂林541199 湖南医药学院公共卫生与检验医学院怀化418000 桂林医学院-明舜制药慢性病防治研究联合实验室邵东422800

邻苯二甲酸二(2-乙基己基)酯(DEHP)是目前使用最广泛的增塑剂之一,DEHP具有毒性,长期暴露会对机体的多个系统产生损害,特别是对雄性生殖系统的毒性作用更为明显。DEHP通过诱导氧化应激、调控细胞自噬,促进生精细胞和睾丸间质细胞凋亡、... 详细信息

邻苯二甲酸二(2-乙基己基)酯(DEHP)是目前使用最广泛的增塑剂之一,DEHP具有毒性,长期暴露会对机体的多个系统产生损害,特别是对雄性生殖系统的毒性作用更为明显。DEHP通过诱导氧化应激、调控细胞自噬,促进生精细胞和睾丸间质细胞凋亡、抑制睾酮合成、破坏血-睾屏障、诱导睾丸支持细胞铁死亡以及影响子代雄性的表观遗传等,造成生殖器官的病理损伤。本文就DEHP对睾丸的毒性作用及机制进行综述,拟为男性生殖障碍的防治研究提供新思路。

关键词：邻苯二甲酸二(2-乙基己基) 酯睾丸生殖毒性氧化应激铁死亡

Non-symmetric distributions of solids deposition for solid-water stratified flow in deviated tubing strings

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Petroleum Science 2023年第5期20卷 3048-3061页

作者： Xin-Fu Liu chun-Hua Liu zhong-Xian Hao Ying Zheng Kai Zhang Jian-Feng Wang Song-Bo Wei Ai-Gang Hao Jun-Ling Tao Hui Cheng School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdaoShandong266520China College of Mechanical and Electronic Engineering China University of Petroleum(East China)QingdaoShandong266580China Research Institute of Exploration&Development PetroChinaBeijing100083China Department of Chemical and Biochemical Engineering Western UniversityOntarioN6A 3K7Canada Lusheng Petroleum Development Company Ltd. SINOPECDongyingShandong256657China

Dynamic performance on solids flow with water in deviated tubing is essential for the reliability of pump and normal operation of horizontal and directional *** with coal-water flow in vertical tubing and sand-oil flow with high production in deviated tubing,solids deposition with water shows obvious non-symmetric distributions in deviated tubing from simulations and *** mathematical model of two phase flow was developed under coupling conditions of deviated tubing,low flow rate and viscosity based on the kinetic theory of granular flow and first-order discrete *** results show that solid-water stratified flow in deviated tubing can be divided into two zones of suspension bed and the moving bed throughout the flow *** solid flowing velocity with water is negative and particles slide down at the bottom of moving bed *** process of solids flow with water in deviated tubing will produce pressure loss and consume the kinetic *** thickness of deposited layer and the flowing velocity of solids flow downward with water at the moving bed zone enhance with the decreased inlet flow rate and the increased particle size,tubing inside diameter(ID)and inclination *** are easier into suspension from the upper part of moving bed zone to suspension bed zone and more solid particles flow with water towards the tubing outlet with the increase of inlet flowing *** decision is made to reduce the screen width,tubing ID and inclination angle to maintain to be greater than critical deposition velocity in order to prevent solids *** it provides the theoretical basis and technical reserves for solid control and offers an effective approach to enhance tubing cleaning in deviated strings.

关键词： Deviated tubing Stratified flow Solid deposition Critical velocity Prevent solids settling

温室气体排放与番茄产量对水肥气耦合的响应机制研究

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农业机械学报 2024年第5期55卷 312-322页

作者：孙亚楠段琳博钟华昱蔡焕杰王晓云赵政鑫西北农林科技大学水利与建筑工程学院陕西杨凌712100 西北农林科技大学中国旱区节水农业研究院陕西杨凌712100 河海大学水利水电学院南京210098

为探求温室番茄节水减排优产的灌溉模式,以番茄(金鹏8号)为研究对象,设置I1和I2(对应作物-皿系数kcp为0.8和1.0)2个灌水水平,F1和F2(对应施氮量180 kg/hm^(2)和240 kg/hm^(2))2个施氮水平,A1、A2和CK(1倍和2倍文丘里加气量,不加气CK作... 详细信息

为探求温室番茄节水减排优产的灌溉模式,以番茄(金鹏8号)为研究对象,设置I1和I2(对应作物-皿系数kcp为0.8和1.0)2个灌水水平,F1和F2(对应施氮量180 kg/hm^(2)和240 kg/hm^(2))2个施氮水平,A1、A2和CK(1倍和2倍文丘里加气量,不加气CK作为对照处理)3个加气水平,采用3因素完全随机设计,共10个处理,每个处理重复3次,采用静态暗箱-气相色谱法对番茄全生育期温室气体排放进行监测分析,探究土壤CO_(2)、N_(2)O、CH_(4)排放与番茄产量的变化规律;分析灌水水平、施氮水平和加气水平对温室番茄产量和温室气体排放的影响,综合全球净增温潜势(Net global warming potential,NGWP)和温室气体排放强度(Greenhouse gas intensity,GHGI),提出以节水减排高产为目标的温室番茄水肥气一体化滴灌管理模式。结果表明:灌溉水平和施氮水平增大均会增加土壤CO_(2)、N_(2)O排放通量,I2处理较I1处理平均增加24.8%(P0.05),F2处理比F1处理平均增加8.6%(P>0.05)与34.9%(P0.05)和20.9%、62.9%(P<0.05)。番茄全生育期内土壤CH4排放通量呈现土壤为CH4的汇,灌水水平增大会增加土壤CH4排放通量,而施氮水平增加则会减小CH4排放通量,I2处理比I1处理平均增加27.8%(P<0.05),F2处理比F1处理平均减少25.5%(P<0.05);加气、施氮和灌水会显著增加番茄产量(P<0.05)。综合考虑经济因素和生态因素,A1F2I1处理效益最佳,即加气水平A1、施氮水平F2、灌水水平I1的组合策略可以兼顾节水优产减排要求,为西北地区温室番茄较优灌溉模式。

关键词：温室气体番茄产量加气灌溉水肥气耦合全球净增温潜势

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