检索结果-南通市图书馆

Effect of precipitation pH and coexisting magnesium ion on phosphate adsorption onto hydrous zirconium oxide

Journal of environmental Sciences 2019年第2期31卷 167-187页

作者： Jianwei Lin Xingxing Wang Yanhui Zhan college of Marine ecology and environment Shanghai Ocean University

To understand the effect of precipitation pH and coexisting Mg^(2+) on phosphate adsorption onto zirconium oxide(ZrO_2), ZrO_2 particles precipitated at pH 5.3, 7.1 and 10.5, i.e., ZrO_2(5.3), ZrO_2(7.1)and ZrO_2(10.5), respectively were prepared and characterized, then their adsorption performance and mechanism in the absence and presence of Mg^(2+) were comparatively investigated in this study. The results showed that the Elovich, pseudo-second-order and Langmuir isotherm models correlated with the experimental data well. The adsorption mechanism involved the complexation between phosphate and zirconium. Coexisting Mg^(2+) slightly inhibited the adsorption of phosphate on ZrO_2(5.3), including the adsorption capacity and rate, but coexisting Mg^(2+) greatly increased the adsorption capacity and rate for ZrO_2(7.1)and ZrO_2(10.5). The enhanced adsorption of phosphate on ZrO_2(7.1) and ZrO_2(10.5) in the presence of Mg^(2+) was mainly due to the formation of Mg^(2+)-HPO_4^(2-) ion pair(MgHPO_4~0) in the solution and then the adsorption of MgHPO_4~0 on the adsorbent surface, forming the phosphatebridged ternary complex Zr(OPO_3H)Mg. In the absence of Mg^(2+) , the maximum phosphate adsorption capacity at pH 7 calculated from the Langmuir isotherm model decreased in the order of ZrO 2(7.1)(67.3 mg/g) > ZrO_2(5.3)(53.6 mg/g) ≈ ZrO_2(10.5)(53.1 mg/g), but it followed the order of Zr O2(7.1)(97.0 mg/g) > ZrO_2(10.5)(79.7 mg/g) > ZrO_2(5.3)(51.3 mg/g) in the presence of Mg^(2+) . The results of this work suggest that ZrO_2(7.1) is more suitable for use as an adsorbent for the effective removal of phosphate from municipal wastewater than ZrO_2(5.3) and ZrO_2(10.5),because Mg^(2+) is generally present in this wastewater.

关键词： Hydrous zirconium oxide Different precipitation pH values Adsorption Phosphate Magnesium ion Effect

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Song variation of a native songbird in a modified habitat by invasive plant

引用

Integrative Zoology 2022年第1期17卷 93-104页

作者： Pan CHEN Taiyu CHEN Bin LIU Manyu ZHANG Changhu LU college of Biology and the environment Nanjing Forestry UniversityNanjingChina School of ecology and environment Anhui Normal UniversityChina

Habitat structure has been considered as an important factor affecting the acoustic evolution of birds,and bird songs are increasingly affected by artificial environmental variation.Invasive plants sometimes can dramatically alter native habitats,but the song variation of native songbirds migrating into invaded habitats has received little attention.The invasion of smooth cordgrass Spartina alterniflora in the coastal wetlands of eastern China has drastically altered the vegetation structure and some small passerines have begun to use invaded habitats to breed.In this study,we compared the song type prevalence and the song characteristics of male plain prinia Prinia inornata to identify differences in vocal behavior between native and invaded habitats.We also tested for differences in vocal behavior in relation to singing perch and wind speed variation between different habitats.The results indicated that males of plain prinia in invaded habitats sang shorter songs than those in native habitats and had a lower song diversity.The homogeneous vegetation structure and higher wind speed in invaded habitats likely leads to males changing the traditional perched singing style.The song variation may be related to the founder effect,the alteration of vegetation structure and microclimate in invaded habitats.This finding highlights the need for better understanding the behavioral evolution of native species in the process of adapting to the invaded habitat.In the future,experimental manipulation is needed to ascertain how the invasive plant drove these vocal behavior changes of native songbirds.

关键词： behavioral evolution biological invasion plain prinia smooth cordgrass song diversity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Numerical study of regional environmental carrying capacity for livestock and poultry farming based on planting-breeding balance

引用

Journal of environmental Sciences 2013年第9期25卷 1882-1889页

作者： Lihong Peng Yu Bai college of the environment & ecology Xiamen University

In consideration of the need to maintain planting-breeding balance, this article examines the capacity of the soil in Putian City, Fujian Province to absorb livestock and poultry excreta, and computes the environmental carrying capacity for livestock and poultry farming （ECCLPF） in each district of the city in terms of the fertility characteristics of the soil in the city, as well as its mix of crops cultivated and farming methods. On the basis of the computations, this work proceeds to classify the alarm grades of the city＇s environmental carrying capacity for livestock and poultry framing, and assess the environmental impact of the livestock and poultry farming industry. The results of our study indicate that, the city＇s ECCLPF ranges from 8.27 to 23.23 heads per ha when computed on the basis of nitrogen, and from 5.79 to 24.53 heads per ha when computed on the basis of phosphorus. A comparison between our research findings and the existing farming scale in Putian reveals that, in certain parts of the city, ECCLPF is overburdened to varying degrees. Specifically, Chengxiang District is severely overburdened, Hanjiang District and Meizhou Island have a level of overburdening between virtual overburdening and significant overburdening, Licheng District is virtually overburdened, and Xiuyu, Xianyou, and Bei＇an Districts have not exceeded their environmental carrying capacity and therefore have varying levels of potential for growth.

关键词： livestock and poultry farming planting-breeding combination nitrogen and phosphorus balance alarm classification system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

用于去除饮用水中硝基酚的双模板磁性分子印迹聚合物的制备及性能

引用

Journal of Central South University 2024年第1期31卷 138-150页

作者：欧阳伊雯梁建军高小峰 Key Laboratory of the Three Gorges Reservoir Region’s Eco-environment Ministry of EducationCollege of Environment and EcologyChongqing UniversityChongqing 400045China

为高效去除4-硝基酚(4-NP)和2,4-二硝基酚(2,4-DNP),本实验采用4-NP和2,4-DNP作为模板分子,以衣通酸(IA)为功能单体,磁性纳米氧化铁(Fe3O4@SiO2)为载体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,采用表面分子... 详细信息

为高效去除4-硝基酚(4-NP)和2,4-二硝基酚(2,4-DNP),本实验采用4-NP和2,4-DNP作为模板分子,以衣通酸(IA)为功能单体,磁性纳米氧化铁(Fe3O4@SiO2)为载体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,采用表面分子印迹技术制备了双模板磁性分子印迹聚合物(D-MIPs)。利用傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)对D-MIPs的形貌进行表征。研究了D-MIPs的吸附性能、可再生性和适用性。结果表明,D-MIPs成功地包覆在Fe3O4@SiO2载体表面,聚合效果良好,且具有特异的识别位点和良好的印迹性能,其直径为90 nm,形状均匀。4-NP-MIPs、2,4-DNP-MIPs和D-MIPs对目标分子的理论吸附量分别为103.97,73.14和123.99 mg/g,存在许多不同吸附能的吸附位点。D-MIPs在30 min内达到最佳吸附平衡状态,其最佳拟合模型为Freundlich吸附模型和拟二阶动力学模型,表明其吸附是通过化学吸附过程进行的。实验结果表明,在不同水样中,MIPs具有高度的特异性识别和选择性吸附能力。经过8次再生循环后,D-MIPs的吸附能力仅下降7.51%,证实了MIPs具有优异的再生性能。

关键词： 4-硝基苯酚 2,4-二硝基酚双模板分子印迹聚合物吸附性能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

glmm.hp包对零膨胀广义线性混合模型与多元回归的扩展

引用

Journal of Plant ecology 2023年第6期16卷 85-91页

作者： Jiangshan Lai Weijie Zhu Dongfang Cui Lingfeng Mao College of Ecology and Environment Nanjing Forestry UniversityNanjing 210037China Research Center of Quantitative ecology Nanjing Forestry UniversityNanjing 210037China

glmm.hp是一个专为评估广义线性混合模型(GLMMs)中共线预测变量的相对重要性而开发的R包。自从其于2022年1月发布以来,已迅速在生态学界获得认可和流行。然而,先前的glmm.hp包仅限于处理仅来源于lme4和nlme包的GLMMs。最新的glmm.hp包... 详细信息

glmm.hp是一个专为评估广义线性混合模型(GLMMs)中共线预测变量的相对重要性而开发的R包。自从其于2022年1月发布以来,已迅速在生态学界获得认可和流行。然而,先前的glmm.hp包仅限于处理仅来源于lme4和nlme包的GLMMs。最新的glmm.hp包增加了新功能。首先,它整合了从glmmTMB包获得的结果,使其能够有效地处理零膨胀广义线性混合模型。此外,最新的glmm.hp包添加了基于原始R2和校正R2的普通多元回归的共性分析和层次分割的功能。本文将展示这些新功能,更方便广大的研究人员使用。

关键词：共性分析广义混合效应模型层次分割边际R2 多元回归相对重要性方差分解零膨胀模型

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

One more step to realistic CO_(2) reduction reactions——geometric structures evolutions at gas-solid interface

引用

Rare Metals 2024年第2期43卷 849-852页

作者： Ya-Qiang Xie Xin Yu Ting Wang college of the environment and ecology Xiamen UniversityXiamen361102China

A rational design of copper(Cu)nanocatalyst is critical to the efficient carbon dioxide(CO_(2))conversion toward C1/C2 chemical products.Yet,the lack of actual information on the vicinal Cu interfaces hinders the intrinsic activitystructure correlation establishment.Now with atomic-scale in situ characterizations(AP-STM and synchrotron-based AP-XPS),Park and co-workers study and identify the adsorbate-driven morphological evolution of Cu nanoclusters on the Cu(997)surface,providing real-space evidence for the critical role of vicinal structures on Cu nanocatalyst.Such observed surface roughening trends caused by dissociated atomic oxygen and CO adsorbates subsequently affect the result of successive catalytic reactions to produce critical intermediates,such as carbonate and formate,during the CO_(2)reduction reaction.

关键词： reaction critical rational

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recent advances in persulfate-based advanced oxidation processes for organic wastewater treatment

引用

Chinese Chemical Letters 2022年第10期33卷 4461-4477页

作者： Ke Tian Limin Hu Letian Li Qingzhu Zheng Yanjun Xin Guangshan Zhang college of Resource and environment Qingdao Engineering Research Center for Rural EnvironmentQingdao Agricultural UniversityQingdao 266109China School of ecology and environment Zhengzhou UniversityZhengzhou 450001China

In recent years,with the emergence of new pollutants,the effective treatment of wastewater has become very important.Persulfate-based advanced oxidation processes have been successfully applied to the treatment of wastewater,such as wastewater containing antibiotics,pharmaceuticals and personal care products,dyes,endocrine-disrupting chemicals,chlorinated organic pollutants,and phenolics,for the degradation of refractory organic contaminants.This paper summarizes the production of sulfate radicals,which can be generated by the activation of persulfate via conventional and emerging approaches.The existing problems of persulfate-based advanced oxidation processes were analyzed in detail,including residual sulfates,coexisting factors(coexisting inorganic anions and natural organic matter),and energy consumption.This paper proposes corresponding possible solutions to the problems mentioned above,and this paper could provide a reference for the application of persulfate-based advanced oxidation processes in actual wastewater treatment.

关键词： Persulfate Sulfate radical Activation Organic wastewater Advanced oxidation processes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhanced secondary organic aerosol formation during dust episodes by photochemical reactions in the winter in Wuhan

引用

Journal of environmental Sciences 2023年第11期133卷 70-82页

作者： Kai Xu Yafei Liu Chenlu Li Chen Zhang Xingang Liu Qijie Li Min Xiong Yujun Zhang Shijie Yin Yu Ding State Key Laboratory of Water environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Wuhan Municipality environmental Monitoring Center Wuhan 430015China college of environment and ecology Chongqing UniversityChongqing 400030China

To investigate the effect of frequently occurring mineral dust on the formation of secondary organic aerosol(SOA),106 volatile organic compounds(VOCs),trace gas pollutants and chemical components of PM_(2.5) were measured continuously in January 2021 in Wuhan,Central China.The observation period was divided into two stages that included a haze period and a following dust period,based on the ratio of PM_(2.5) and PM_(10) concentrations.The average ratio of secondary organic carbon(SOC)to elemental carbon(EC)was 1.98 during the dust period,which was higher than that during the haze period(0.69).The contribution of SOA to PM_(2.5) also increased from 2.75% to 8.64%.The analysis of the relationships between the SOA and relative humidity(RH)and the odd oxygen(e.g.,O_(X)=O_(3)+NO_(2))levels suggested that photochemical reactions played a more important role in the enhancement of SOA production during the dust period than the aqueous-phase reactions.The heterogeneous photochemical production of OH radicals in the presence of metal oxides during the dust period was believed to be enhanced.Meanwhile,the ratios of trans-2-butene to cis-2-butene and m-/p-xylene to ethylbenzene(X/E)dropped significantly,confirming that stronger photochemical reactions occurred and SOA precursors formed efficiently.These results verified the laboratory findings that metal oxides in mineral dust could catalyse the oxidation of VOCs and induce higher SOA production.

关键词： VOCs Mineral dust Metal oxides SOA Photochemical reactions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integrated risk assessment framework for transformation products of emerging contaminants:what we know and what we should know

引用

Frontiers of environmental Science & Engineering 2023年第7期17卷 187-195页

作者： Shengqi Zhang Qian Yin Siqin Wang Xin Yu Mingbao Feng Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems College of the Environment&EcologyXiamen UniversityXiamen 361102China

The continuous input of various emerging contaminants(ECs)has inevitably introduced large amounts of transformation products(TPs)in natural and engineering water scenarios.Structurally similar to the precursor species,the TPs are expected to possess comparative,if not more serious,environmental properties and risks.This review summarizes the state-of-the-art knowledge regarding the integrated risk assessment frameworks of TPs of ECs,mainly involving the exposure-and effectdriven analysis.The inadequate information within existing frameworks that was essential and critical for developing a better risk assessment framework was discussed.The main strategic improvements include(1)non-targeted product analysis in both laboratory and field samples,(2)omics-based highthroughput toxicity assessment,(3)multichannel-driven mode of action in conjugation with effectdirected analysis,and(4)machine learning technology.Overall,this review provides a concise but comprehensive insight into the optimized strategy for evaluating the environmental risks and screening the key toxic products from the cocktail mixtures of ECs and their TPs in the global water cycle.This facilitates deciphering the mode of toxicity in complex chemical mixtures and prioritizing the regulated TPs among the unknown products,which have the potential to be considered a class of novel"ECs"ofgreatconcern.

关键词： Risk assessment frameworks Trans formation products Emerging contaminants High-throughput toxicity screening Water treatment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A novel approach for VOC source apportionment combining characteristic factor and pattern recognition technology in a Chinese industrial area

引用

Journal of environmental Sciences 2022年第11期34卷 25-37页

作者： Deji Jing Nana Cheng Cheng Zhang Ziwei Chen Xingnong Cai Sujing Li Jingkai Zhao Qiaoli Wang Wei Li Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou 310027China college of environment Zhejiang University of TechnologyHangzhou 310032China

Volatile organic compound(VOC) emission control and source apportionment in small-scale industrial areas have become key topics of air pollution control in China. This study proposed a novel characteristic factor and pattern recognition(CF-PR) model for VOC source apportionment based on the similarity of characteristic factors between sources and receptors.A simulation was carried out in a typical industrial area with the CF-PR model involving simulated receptor samples. Refined and accurate source profiles were constructed through in situ sampling and analysis, covering rubber, chemicals, coating, electronics, plastics, printing, incubation and medical treatment industries. Characteristic factors of n-undecane,styrene, o-xylene and propane were identified. The source apportionment simulation results indicated that the predicted contribution rate was basically consistent with the real contribution rate. Compared to traditional receptor models, this method achieves notable advantages in terms of refinement and timeliness at similar accuracy, which is more suitable for VOC source identification and apportionment in small-scale industrial areas.

关键词： VOC Source apportionment Characteristic factors Pattern recognition Industrial areas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：