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Study of ciprofloxacin removal by biochar obtained from used tea leaves

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Journal of Environmental Sciences 2018年第11期30卷 20-30页

作者： Jie Li Guangwei Yu Lanjia Pan Chunxing Li Futian You shengyu xie Yin Wang Jianli Ma Xiaofu Shang Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiarnen 361021 China University of Chinese Academy of Sciences Beijing 100049 China Tianjin Huankelijia Environment Remediation Technology Co. Ltd. Tianjin 300191 China

In this study, used tea leaves （UTLs） were pyrolyzed to obtain used tea-leaf biochar （UTC）, and then the UTC was used as an adsorbent to remove ciprofioxacin （CIP） from aqueous solutions. Batch experiments were conducted to investigate the CIP adsorption performance and mechanism. The results showed that the CIP-adsorbing ability first increased and then declined as the UTC pyrolysis temperature increased. The UTC obtained at 450℃ presented excellent CIP-absorbing ability at pH 6 and 40℃. The maximum monolayer adsorption capacity was 238.10 mg/g based on the Langrnuir isotherm model. The pseudo-second-order kinetic equation agreed well with the CIP adsorption process, which was controlled by both external boundary layer diffusion and intra-particle diffusion. The characterization analysis revealed that the - OH groups, G=C bonds of aromatic rings, C- H groups in aromatic tings and phenolic C - O bonds play vital roles in the CIP adsorption process, and that the N - C, N - O, O- C-O and C- OH groups of UTC were consumed in large quantities. π-π interactions, hydrogen bonding and electrostatic attraction are inferred as the main adsorption mechanisms. The present work provides not only a feasible and promising approach for UTLs utilization but also a potential adsorbent material for removing high concentrations of CIP from aqueous solutions.

关键词： Biochar Used tea leaves Ciprofloxacin adsorption Isotherm Kinetics Mechanism

Moderate sewage sludge biochar application on alkaline soil for corn growth:a field study

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Biochar 2021年第2期3卷 135-147页

作者： shengyu xie Guangwei Yu Ruqing Jiang Jianli Ma Xiaofu Shang Gang Wang Yin Wang Yongan Yang Chunxing Li CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Graduate School of Environmental Studies Tohoku University6‑6‑07 AobaAramaki‑azaAoba‑kuSendaiMiyagi 980‑8579Japan Tianjin Academy of Environmental Sciences Tianjin 300191China Tianjin High Quality Agricultural Products Development Demonstration Center Tianjin 301508China Department of Environmental Engineering Technical University of Denmark2800 Kongens LyngbyDenmark

In view of the risks induced by the inhibitory effects of applying impracticably large amounts of sewage sludge biochar(SSB)to the alkaline soil,this field study investigated the influence of moderate biochar amendments(0,1500,4500,and 9000 kg/hm2)on corn growth,alkaline soil properties,and the uptake of potentially toxic elements(PTEs).The results showed that applying more SSB would decrease the ammonium nitrogen concentration and increase the available phosphorus and potassium concentrations,which inhibited corn plant growth because of high background nutrient levels of the alkaline *** the alkaline soil was amended with 1500 kg/hm2 SSB,the dry weight of 100 niblets increased from 32.11 g in the control to 35.07 *** was no significant variation in the total concentration of PTEs in the *** concentrations of Mn,Ni,Cu,and Zn in niblets decreased from 5.54,0.83,2.26,and 27.15 mg/kg in the control to 4.47,0.62,1.30,and 23.45 mg/kg,***,the health risk from corn consumption was significantly ***,the combination of SSB and fertilizer improved corn growth and reduced the risk of consumption of ***,considering the increase in corn fruit yield and the decrease in consumption risk,applying 1500 kg/hm2 of biochar to alkaline soils is a realistically achievable rate,which can broaden the utilization of SSB for remediation of different types of soil.

关键词： Sewage sludge biochar Alkaline soil Corn growth Soil property Potentially toxic elements Soil remediation

Modification strategies for non-aqueous, highly proton-conductive benzimidazole-based high-temperature proton exchange membranes

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Chinese Chemical Letters 2024年第4期35卷 43-51页

作者： Yunfa Dong Shijie Zhong Yuhui He Zhezhi Liu shengyu Zhou Qun Li Yashuai Pang Haodong xie Yuanpeng Ji Yuanpeng Liu Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

High-temperature proton exchange membranes(HT-PEMs) possess excellent thermal and outstanding electrochemical stability, providing an avenue to realize high-temperature proton exchange membranes fuel cells(HT-PEMFCs) with both superior power density and long-term durability. Unfortunately, polybenzimidazole(PBI), a typical material for conventional HT-PEMs, fails to compromise the high nonaqueous proton conductivity and high mechanical properties, thus hindering their practical *** efficient nonaqueous proton conduction is crucial for HT-PEMFC, and many insightful research works have been done in this area. However, there still lacks a report that integrates the host-guest interactions of phosphoric acid doping and the structural stability of polymers to systematically illustrate modification strategies. Here, we summarize recent advancements in enhancing the nonaqueous proton conduction of HT-PEMs. Various polymer structure modification strategies, including main chain and side group modification, cross-linking, blocking, and branching, are reviewed. Composite approaches of polymer, including compounding with organic porous polymers, filling the inorganic components and modifying with ionic liquids, etc., are also covered in this work. These strategies endow the HT-PEMs with more free volume, nanophase-separated structure, and multi-stage proton transfer channels, which can facilitate the proton transportation and improve their performance. Finally, current challenges and future directions for further enhancements are also outlined.

关键词： Benzimidazole Nonaqueous proton conduction Free volume Nanophase-separated structure Structure modification

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南京居民食物消费系统中的碳变化与环境负荷

环境污染与防治 2021年第2期43卷 248-254页

作者：卢然谢晟宇谢标南京师范大学环境学院江苏南京210023

以南京市为例,分析了1993-2013年城市、农村居民食物碳消费及其所引起的环境负荷。结果表明:城乡居民的动物性食物消费总量和占比都在不断上升,其中城市居民的食物消费结构呈现多元化发展趋势,而农村居民食物消费仍以少数几种食物为主... 详细信息

以南京市为例,分析了1993-2013年城市、农村居民食物碳消费及其所引起的环境负荷。结果表明:城乡居民的动物性食物消费总量和占比都在不断上升,其中城市居民的食物消费结构呈现多元化发展趋势,而农村居民食物消费仍以少数几种食物为主。食物消费造成的碳环境负荷总体不断增加,进入土壤中的碳比例上升是需要重点关注的环境问题。为了降低南京市食物消费系统碳环境负荷,需要提高资源循环利用效率和废弃物处理水平。作为第三批国家低碳城市试点,南京市需要采取针对性措施鼓励低碳消费,发展低碳农业。

关键词：南京市食物消费系统碳环境负荷

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昆明市食物生产消费碳素动态变化

环境科学学报 2018年第4期38卷 1673-1681页

作者：谢晟宇汪雪野沈海蓉谢标南京师范大学环境学院南京210023

食物生产消费系统中碳素的梯级流动变化会产生一系列环境影响.基于1990—2013年昆明市食物生产消费变化,测算分析了农业生产的碳汇碳排量、城乡居民食物碳消费动态变化及食物碳消费带来的环境负荷变化.结果表明,食物生产系统中碳汇和碳... 详细信息

食物生产消费系统中碳素的梯级流动变化会产生一系列环境影响.基于1990—2013年昆明市食物生产消费变化,测算分析了农业生产的碳汇碳排量、城乡居民食物碳消费动态变化及食物碳消费带来的环境负荷变化.结果表明,食物生产系统中碳汇和碳排总量分别由1990年的705.44 Gg·a^(-1)和496.92 Gg·a^(-1)增长至2013年的1195.53 Gg·a^(-1)和1012.33 Gg·a^(-1),净碳汇水平为正值,但呈下降趋势;城镇居民人均食物碳消费量由61.42 kg·人^(-1)·a^(-1)减少至44.65 kg·人^(-1)·a^(-1),农村居民人均食物碳消费量由87.96 kg·人^(-1)·a^(-1)降至48.78 kg·人^(-1)·a^(-1),食物碳消费总量由336.00 Gg·a^(-1)波动下降到294.53 Gg·a^(-1).畜禽养殖粪便排放和肠道发酵是食物生产过程中的主要碳源,占到60%以上,其次是农用物资投入所产生的碳排放,约占30%,并呈增加态势,其中,化肥是农用物资碳排放的主要影响因素.食物消费造成的碳素环境负荷中,损失进入大气的碳素比例最高,占到80%,其次是土壤,最少的是水体.进入大气的碳素由1990年的270.63 Gg·a^(-1)波动下降至2013年的170.68 Gg·a^(-1),减少了36.93%,但进入土壤和水体的碳素明显增长,其中,厨余垃圾碳量由35.42 Gg·a^(-1)增加至129.84 Gg·a^(-1),增加了266.57%.昆明市作为低碳城市试点,需要采取针对性措施发展低碳农业及低碳消费.

关键词：碳汇碳排食物消费环境负荷昆明市

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污泥中抗生素热解特性及动力学分析

环境工程学报 2017年第9期11卷 5213-5219页

作者：李杰潘兰佳余广炜尤甫天谢胜禹汪印中国科学院城市环境研究所中国科学院城市污染物转化重点实验室厦门361021 中国科学院大学北京100049

通过分析污泥中3种典型抗生素环丙沙星(CIP)、土霉素(OTC)和磺胺二甲嘧啶(SM2)的热解过程与失重特性,研究其热解动力学特征。结果表明:CIP、OTC、SM2主要热解温度区间分别为150~625℃、220~600℃、260~480℃;初始热解温度以及最大失重... 详细信息

通过分析污泥中3种典型抗生素环丙沙星(CIP)、土霉素(OTC)和磺胺二甲嘧啶(SM2)的热解过程与失重特性,研究其热解动力学特征。结果表明:CIP、OTC、SM2主要热解温度区间分别为150~625℃、220~600℃、260~480℃;初始热解温度以及最大失重峰对应温度均为OTC

关键词：环丙沙星土霉素磺胺二甲嘧啶热解动力学活化能

μ-H_2O-桥联均相铁(Ⅲ)催化剂的合成及其对邻苯二甲酸二丁酯的降解性能

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环境化学 2016年第9期35卷 1745-1752页

作者：杨军谢晟瑜陈扬王新鑫沈昊宇夏清华浙江大学宁波理工学院生物与化学工程学院宁波315100 有机化工新材料湖北省协同创新中心有机功能分子合成与应用教育部重点实验室湖北大学武汉430062

合成了μ-水桥联的双核铁(Ⅲ)配合物[Fe_2(μ-H_2O)(TS)_4(H_2O)_2]_2Cl_4·4H_2O](μ-H_2O-Fe(Ⅲ)-TS)(TS=N,N'-triethylentetramine-salicylideimine;即三乙烯四胺水杨醛亚胺),并以其为催化剂、通过类Fenton反应考察了其对邻苯二甲酸二丁酯(DBP)的催化降解性质.结果表明,μ-H_2O-Fe(Ⅲ)-TS在可见光条件下即可对DBP进行高效催化降解.采用UV-vis谱监测了μ-H_2O-Fe(Ⅲ)/DBP/可见光体系在加入H_2O_2前后不同时间的光谱,结果表明催化剂的活性位点可能为Fe(Ⅲ)-H_2O-Fe(Ⅲ)中心,形成了有利于H_2O_2活化的Fe(Ⅲ)-H_2O-Fe(Ⅲ)-H_2O_2过渡态,使得·OH可以在可见光作用下便可产生.降解实验研究表明,在pH值3.0—8.0范围内,μ-H_2O-Fe(Ⅲ)-TS的浓度为1.16—11.56μmol·L-1,H_2O_2的浓度为0.408—40.8 mmol·L-1,μ-H_2O-Fe(Ⅲ)-TS/H_2O_2/可见光体系均能在5 min内对浓度为14.39—143.88μmol·L^(-1)的DBP实现近100%降解,较普通Fenton反应体系有更宽的pH适用范围.μ-H_2O-Fe(Ⅲ)-TS可循环使用,是有优异潜力的水中DBP绿色降解催化剂.

关键词： μ-水桥联的双核铁(Ⅲ)配合物邻苯二甲酸二丁酯(DBP) 类Fenton反应催化降解

吖啶橙共振散射光谱法快速测定水中痕量亚氯酸根

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工业水处理 2016年第9期36卷 89-91页

作者：凌绍明欧阳辉祥陈盛余谢宇奇百色学院化学与环境工程学院广西百色533099

在盐酸介质条件下,I-被亚氯酸根氧化成I2,I2再与过量的I-形成阴离子I3-。体系中带正电荷的吖啶橙（AO）与I3-在静电力的作用下形成缔合物微粒,导致体系的共振散射强度增强,据此建立了一种用共振散射光谱法测定水中亚氯酸根的新方法。研... 详细信息

在盐酸介质条件下,I-被亚氯酸根氧化成I2,I2再与过量的I-形成阴离子I3-。体系中带正电荷的吖啶橙（AO）与I3-在静电力的作用下形成缔合物微粒,导致体系的共振散射强度增强,据此建立了一种用共振散射光谱法测定水中亚氯酸根的新方法。研究了碘化钾和AO用量等因素对体系的影响,优化了实验条件。在最佳实验条件下,亚氯酸根质量浓度在7.18×10^-4-0.114 mg/L范围内与ΔIRS呈良好的线性关系。该方法的线性方程为ΔIRS=870.39ρ＋9.273 9,相关系数（R2）为0.992 7,检出限（3σ）为1.8×10^-4 mg/L。

关键词：亚氯酸根吖啶橙共振散射光谱法缔合微粒

污泥水热联合热解处理对固相产物中重金属的影响

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环境工程学报 2018年第7期12卷 2114-2122页

作者：谢胜禹余广炜李杰尤甫天汪刚汪印马建立商晓甫中国科学院城市环境研究所中国科学院城市污染物转化重点实验室厦门361021 中国科学院大学北京100049 天津市环境保护科学研究院天津300191

对酸性重金属污泥(AS)、碱性重金属污泥(BS)及其混合物(MS)进行水热联合热解处理,探讨了固相产物中重金属(Cr、Mn、Ni、Cu和Zn)的BCR形态变化与TCLP浸出毒性特征,并开展潜在生态风险评价。结果表明:AS经水热联合热解处理后得到的固相产... 详细信息

对酸性重金属污泥(AS)、碱性重金属污泥(BS)及其混合物(MS)进行水热联合热解处理,探讨了固相产物中重金属(Cr、Mn、Ni、Cu和Zn)的BCR形态变化与TCLP浸出毒性特征,并开展潜在生态风险评价。结果表明:AS经水热联合热解处理后得到的固相产物(ASC)中重金属的稳定性得到改善,Ni和Zn的残渣态比例显著增加,分别从8.33%和28.08%升至27.04%和51.31%;BS经水热联合热解处理后得到的固相产物(BSC)中重金属的稳定性改善不明显,Cr和Cu的残渣态比例分别从69.25%和65.42%升至82.09%和66.69%,而其他重金属的残渣态比例有所下降。MS经过水热联合热解处理,固相产物(MSC)中重金属的固化效果进一步提高。与理论值相比,Cr、Mn、Ni、Cu和Zn的残渣态比例分别从89.03%、55.85%、47.33%、55.39%和73.19%提高至98.09%、66.72%、48.49%、89.07%和86.70%,其浸出毒性均在USEPA标准以下,潜在风险程度为轻微水平,这为水热联合热解工艺处置重金属污泥提供新的思路。

关键词：污泥水热处理热解重金属形态分析浸出毒性风险评价