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一步法制备磁性PEI-Fe_(3)O_(4)/La(OH)_(3)去除微污染水体中磷的研究

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环境科学学报 2024年第7期44卷 163-172页

作者：张一凡徐行行成家辉宋小宝杨梖薛利红何世颖江苏省农业科学院农业资源与环境研究所南京210014 南京农业大学资源与环境科学学院南京210095 南京理工大学化学与化工学院南京210094

低浓度磷的深度去除是缓解水体富营养化的关键.本研究采用共沉淀法制备了聚乙烯亚胺(PEI)修饰的Fe_(3)O_(4)/La(OH)_(3)磁性除磷剂,研究发现该材料对磷酸根具有良好的吸附性能,其吸附符合Langmuir等温模型和准二级动力学模型,理论最大... 详细信息

低浓度磷的深度去除是缓解水体富营养化的关键.本研究采用共沉淀法制备了聚乙烯亚胺(PEI)修饰的Fe_(3)O_(4)/La(OH)_(3)磁性除磷剂,研究发现该材料对磷酸根具有良好的吸附性能,其吸附符合Langmuir等温模型和准二级动力学模型,理论最大吸附量为87.09 mg·g^(-1).Fe_(3)O_(4)/La(OH)_(3)在竞争性离子(SO_(4)^(2-)、Cl^(-)和NO_(3)^(-))存在下对磷酸根仍具有特异吸附能力.通过磁铁对吸附剂进行回收再利用,5次吸附-脱附循环过程中磷酸盐去除率维持在90%以上.同时,在实际微污染水体(PO_(4)^(3-)浓度<1 mg·L^(-1))的处理中体现出良好的净化效果.蒙特卡洛模型计算显示,PEI-Fe_(3)O_(4)/La(OH)_(3)经济成本较低且环境友好.综上所述,PEI-Fe_(3)O_(4)/La(OH)_(3)是一种具有实际应用前景的除磷材料.

关键词：微污染水体磷酸盐氢氧化镧四氧化三铁聚乙烯亚胺吸附机制

肠道菌群干预治疗成人局灶性癫痫的临床疗效分析

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莆田学院学报 2024年第5期31卷 52-58页

作者：何俊伟薛丽虹张一攀莆田学院附属医院神经内科福建莆田351100

探讨肠道菌群干预联合左乙拉西坦、吡仑帕奈治疗对成人局灶性癫痫患者的临床治疗效果的影响;将局灶性癫痫患者随机分为观察组(常规治疗+肠道菌群干预)与对照组(常规治疗),各78例。治疗前,两组各项指标无显著差异(P>0.05);治疗后,观察组... 详细信息

探讨肠道菌群干预联合左乙拉西坦、吡仑帕奈治疗对成人局灶性癫痫患者的临床治疗效果的影响;将局灶性癫痫患者随机分为观察组(常规治疗+肠道菌群干预)与对照组(常规治疗),各78例。治疗前,两组各项指标无显著差异(P>0.05);治疗后,观察组患者癫痫发作频率降低,无发作率(92.31%)、总有效率(80.77%)提高(P<0.05),生活质量与睡眠质量改善(P<0.05);认为肠道菌群干预联合常规治疗能提升成人局灶性癫痫患者的疗效,为局灶性癫痫治疗提供了新证据和思路。

关键词：肠道菌群局灶性癫痫癫痫患者生活质量量表-89 匹兹堡睡眠质量指数酶联免疫吸附试验视频脑电图

秸秆水热碳化液修饰二氧化钛去除农村生活污水尾水中抗生素的动力学特征研究

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环境污染与防治 2024年第2期46卷 159-164页

作者：杨梖任卓俞映倞何世颖吴蓉杨林章薛利红农业农村部长江下游平原农业环境重点实验室农业资源与环境研究所江苏省农业科学院江苏南京210014 江苏省凹土资源利用重点实验室淮阴工学院化学工程学院江苏淮安223001 江苏省产品质量监督检验研究院江苏南京210007

为探究秸秆水热碳化液修饰二氧化钛纳米球(SHCS&TiO_(2))去除抗生素的动力学特征,以实际农村生活污水尾水为目标处理水体,以磺胺嘧啶和红霉素为典型目标污染物,采用时间梯度实验研究和动力学模拟进行分析。结果表明:1)SHCS&TiO_(2)去除... 详细信息

为探究秸秆水热碳化液修饰二氧化钛纳米球(SHCS&TiO_(2))去除抗生素的动力学特征,以实际农村生活污水尾水为目标处理水体,以磺胺嘧啶和红霉素为典型目标污染物,采用时间梯度实验研究和动力学模拟进行分析。结果表明:1)SHCS&TiO_(2)去除两种抗生素的动力学特征有明显差异。去除磺胺嘧啶反应主要发生在前10 min,去除速率为2.11~2.37 mg/(L·min),最终去除率为72.6%~89.5%。去除红霉素反应主要发生在0~20、120~240 min,去除速率分别为1.65~2.34、0.32~0.42 mg/(L·min),最终去除率达到100.0%。2)Behnajady-Modirshahla-Ghanbary反应动力学模型模拟结果最佳。3)去除机制是吸附和催化共同作用,且催化起主要作用。

关键词：秸秆水热碳化液二氧化钛抗生素动力学特征

Fate of Basal N Under Split Fertilization in Rice with ^(15)N Isotope Tracer

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Pedosphere 2018年第1期28卷 135-143页

作者： LI Ganghua LIN Jingjing xue lihong DING Yanfeng WANG Shaohua YANG Linzhang National Engineering and Technology Center for Information Agriculture Key Laboratory of Crop Physiology and Ecology in Southern China Nanjing Agricultural University Nanjing 210095 China Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences Nanjing 210014 China Yancheng Biological Engineering Higher Vocational Technology School Yancheng 224051 China

Split fertilization strategy is popularly adopted in rice to synchronize soil nitrogen(N) supply and crop N demand. Attention has been paid more on mid-season topdressing N, but limited on basal N. A clearer understanding of the basal N fate under split fertilization is crucial for determining rational basal N split ratio to improve the yield and reduce the loss to environment. A two-year field experiment with two N rates of 150 and 300 kg Nha^(-1), two split ratios of basal N, 40% and 25%, and two rice varieties,Wuyunjing 23(japonica) and Y-liangyou 2(super hybrid indica), was conducted. Labelled ^(15) N urea was supplied in micro-plots as basal fertilizer to determine the plant uptake, translocation, soil residual, and loss of basal N fertilizer. The results showed that basal N absorbed by rice was only 1.6%–11.5% before tillering fertilization(8–10 d after transplanting), 6.5%–21.4% from tillering fertilization to panicle fertilization, and little(0.1%–4.4%) after panicle fertilization. The recovery efficiency of basal N for the entire rice growth stage was low and ranged from 18.7% to 24.8%, not significantly affected by cultivars or N treatments. Soil residual basal N accounted for 10.3%–36.4% and decreased with increasing total N rate and basal N ratio, regardless of variety and year. 43.8%–70.4% of basal N was lost into the environment based on the N balance. Basal N loss was significantly linearly positive related with the basal N rate and obviously enhanced by the increasing basal N ratio for both varieties in both 2012 and 2013. The N use efficiency and yield was significantly improved when decreasing the basal N ratio from 40% to 25%. The results indicated that the basal N ratio should be reduced, especially with limited N inputs, to improve the yield and reduce the N loss to the environment.

关键词： N balance N loss N split ratio N use efficiency plant uptake rice variety soil residual N yield

Efficient photocatalysis of tetracycline hydrochloride(TC-HCl) from pharmaceutical wastewater using AgCl/ZnO/g-C_(3)N_(4) composite under visible light: Process and mechanisms

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Journal of Environmental Sciences 2023年第4期126卷 249-262页

作者： Chenman Ding Qiurong Zhu Bei Yang Evangelos Petropoulos lihong xue Yanfang Feng Shiying He Linzhang Yang College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210018China Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural SciencesNanjing 210018China School of Engineering Newcastle UniversityNewcastle upon Tyne NE17RUUK School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210018China

AgCl/ZnO/g-C_(3)N_(4), a visible light activated ternary composite catalyst, was prepared by combining calcination, hydrothermal reaction and in-situ deposition processes to treat/photocatalyse tetracycline hydrochloride(TC-HCl) from pharmaceutical wastewater under visible light. The morphological, structural, electrical, and optical features of the novel photocatalyst were characterized using scanning electron microscopy(SEM), UV-visible light absorption spectrum(UV–Vis DRS), X-ray diffractometer(XRD), Fourier transform infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy(XPS), and transient photocurrent techniques. All analyses confirmed that the formation of heterojunctions between AgCl/ZnO and g-C_(3)N_(4)significantly increase electron-hole transfer and separation compared to pure ZnO and g-C_(3)N_(4). Thus, AgCl/ZnO/g-C_(3)N_(4)could exhibit superior photocatalytic activity during TC-HCl assays(over 90% removal) under visible light irradiation. The composite could maintain its photocatalytic stability even after four consecutive reaction cycles. Hydrogen peroxide(H_(2)O_(2)) and superoxide radical(·O_(2)) contributed more than holes(h+) and hydroxyl radicals(·OH) to the degradation process as showed by trapping experiments. Liquid chromatograph-mass spectrometer(LC-MS) was used for the representation of the TC-HCl potential degradation pathway. The applicability and the treatment potential of AgCl/ZnO/gC_(3)N_(4)against actual pharmaceutical wastewater showed that the composite can achieve removal efficiencies of 81.7%, 71.4% and 69.0% for TC-HCl, chemical oxygen demand(COD) and total organic carbon(TOC) respectively. AgCl/ZnO/g-C_(3)N_(4)can be a prospective key photocatalyst in the field of degradation of persistent, hardly-degradable pollutants, from industrial wastewater and not only.

关键词： Photocatalyst Tetracycline degradation Pharmaceutical wastewater C_(3)N_(4)composites Degradation pathway

Si/Cu3_Si@C Composite Encapsulated in CNTs Network as High Performance Anode for Lithium Ion Batteries

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Journal of Wuhan University of Technology(Materials Science) 2019年第5期34卷 1055-1061页

作者： LU Haoqi xue lihong ZHANG Wuxing State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China BTR New Energy Materials Inc. Shenzhen 518106China

Si/Cu3Si@C composites encapsulated in CNTs network(SCC-CNTs) were synthesized via the combination of ball-milling and CVD methods. SCC-CNTs consist of conductive Cu3Si, amorphous carbon layer, cross-linked CNTs, and the etched pores, which can play the synergistic effects on the improvement of electronic conductivity and Li^+ diffusion. The volume expansion of Si anode is also suppressed during the electrochemical process. The SCC-CNTs composites demonstrate a remarkably improved electrochemical performance compared with pure Si, which can deliver a discharge capacity of 2 171 mAh·g^-1 at 0.4 A·g^-1 with ICE of 85.2%, and retain 1197 mAh· g^-1 after 150 cycles. This work provides a facile approach to massively produce the high-performance Si-based anode materials for next-generation LIBs.

关键词： lithium-ion battery anodes silicon-based composite CNTs Cu3Si

吸咐磷后的镧改性秸秆替代化学磷肥施用对土壤磷形态的影响

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江苏农业学报 2024年第6期40卷 1020-1027页

作者：陈新宇杨智杨梖俞映倞汤婕周丹一任卓薛利红杨林章安徽农业大学资源与环境学院安徽合肥230036 农业农村部长江下游平原农业环境重点实验室/江苏省农业科学院农业资源与环境研究所江苏南京210014

定向改性材料能提升吸附磷的能力,高效去除水体中磷污染,然而吸附材料的后端利用却鲜有研究和报道。本研究以镧元素改性秸秆用于吸附畜禽养殖尾水中的磷,并将吸附磷后的材料作为磷肥进行小麦盆栽试验,动态取样测定不同形态的磷含量,分... 详细信息

定向改性材料能提升吸附磷的能力,高效去除水体中磷污染,然而吸附材料的后端利用却鲜有研究和报道。本研究以镧元素改性秸秆用于吸附畜禽养殖尾水中的磷,并将吸附磷后的材料作为磷肥进行小麦盆栽试验,动态取样测定不同形态的磷含量,分析其对土壤中磷形态的影响。结果表明:本研究镧改性秸秆对养殖尾水中磷吸附效率达到98.59%,最佳投加量为1.4 g/L。小麦生长初期,附磷镧改性秸秆继续吸附土壤的活性态磷,促进土壤中活性磷转化为钙吸附态磷,防止土壤磷的流失。随着小麦生长,钙吸附态磷含量逐渐下降,转变为活性态磷持续供应养分,说明附磷镧改性秸秆具备缓释磷肥的属性。本研究为附磷后材料的利用提供了一种新的思路,有助于缓解农业面源污染。

关键词：镧改性秸秆磷形态面源污染小麦

Biochar Combined with Vermicompost Increases Crop Production While Reducing Ammonia and Nitrous Oxide Emissions from a Paddy Soil

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Pedosphere 2019年第1期29卷 82-94页

作者： WU Di FENG Yanfang xue lihong LIU Manqiang YANG Bei HU Feng YANG Linzhang Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Soil Ecology Lab College of Resources and Environmental Sciences Nanjing Agricultural University

Organic amendments such as vermicompost and biochar have been reported to enhance soil fertility and crop ***, whether the co-application of both amendments has synergistic effects or whether such benefits are accompanied by the risk of gaseous nitrogen(N) loss in an agroecosystem remains unknown. A soil column experiment with a fully factorial design was conducted using three levels of vermicompost(no dose, low dose(1%, weight:weight), and high dose(3%, weight:weight)) without or with biochar(1%, weight:weight) to investigate their effects on rice growth and gaseous N loss across the crop growing season. Our results demonstrated that synergistic interactions existed between vermicompost and biochar in promoting crop yield. Compared with biochar amendment alone, biochar combined with vermicompost significantly(P < 0.01) increased rice yield by 26.5%–35.3%. However,high dose of vermicompost significantly(P < 0.01) increased the cumulative ammonia(NH_3) and nitrous oxide(N_2O) emissions. In the presence of vermicompost, the incorporation of biochar amendment significantly(P < 0.01) decreased the cumulative N_2O emission by 14.1%–18.6%. The lowest emission factor value of NH_3 and N_2O was achieved using biochar in combination with low dose of vermicompost. This study revealed that the combination of biochar and moderate dose of vermicompost offers a novel approach to promote crop productivity while reducing the environmental risk.

关键词： ammonia volatilization crop yield earthworm ecosystem services emission factor gaseous nitrogen loss organic amendment organic waste

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脑卒中患者夫妻疾病沟通体验的质性研究

中华护理杂志 2024年第5期59卷 576-581页

作者：刘志薇梅永霞张振香林蓓蕾陈素艳张杜杜薛利红袁燕张伟宏郑州大学护理与健康学院郑州市450001 滑县人民医院护理部新乡医学院第一附属医院神经内科

目的了解脑卒中患者的夫妻疾病沟通体验。方法采用描述性现象学研究,使用目的抽样法,选取2022年8月—2023年3月在河南省某三级甲等综合医院神经内科住院治疗或复诊的19对脑卒中患者及其配偶进行半结构式访谈,采用Colaizzi 7步法分析资... 详细信息

目的了解脑卒中患者的夫妻疾病沟通体验。方法采用描述性现象学研究,使用目的抽样法,选取2022年8月—2023年3月在河南省某三级甲等综合医院神经内科住院治疗或复诊的19对脑卒中患者及其配偶进行半结构式访谈,采用Colaizzi 7步法分析资料。结果共提炼出2个主题和8个亚主题:建设性疾病沟通,包括开放沟通治疗信息、及时沟通症状变化、积极沟通二级预防和主动开导负性情绪;消极疾病沟通,包括回避沟通、沟通冲突、无效沟通和沟通隐瞒。结论脑卒中患者夫妻既存在建设性疾病沟通也存在消极疾病沟通体验。医护人员应开展针对性的干预,改善脑卒中患者夫妻疾病沟通方式,提升其共同决策能力,减少其负性情绪。

关键词：脑卒中配偶夫妻疾病沟通质性研究护理