检索结果-南通市图书馆

Adsorption behavior of sulfamethazine in an activated sludge process treating swine wastewater

Journal of Environmental Sciences 2014年第8期26卷 1623-1629页

作者： Weiwei Ben Zhimin Qiang Xiaowei Yin Jiuhui Qu Xun Pan Key Laboratory of Aquatic Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Foreign Economic Cooperation Office Ministry of Environmental Protection

Swine wastewater is an important pollution source of antibiotics entering the aquatic environment. In this work,the adsorption behavior of sulfamethazine（SMN）,a commonlyused sulfonamide antibiotic,on activated sludge from a sequencing batch reactor treating swine wastewater was investigated. The results show that the adsorption of SMN on activated sludge was an initially rapid process and reached equilibrium after 6 hr. The removal efficiency of SMN from the water phase increased with an increasing concentration of mixed liquor suspended solids,while the adsorbed concentration of SMN decreased. Solution pH influenced both the speciation of SMN and the surface properties of activated sludge,thus significantly impacting the adsorption process. A linear partition model could give a good fit for the equilibrium concentrations of SMN at the test temperatures（i.e.,10,20 and 30°C）. The partition coefficient（Kd） was determined to be 100.5 L/kg at 20°C,indicating a quite high adsorption capacity for SMN. Thermodynamic analysis revealed that SMN adsorption on activated sludge was an exothermic process. This study could help to clarify the fate and behavior of sulfonamide antibiotics in the activated sludge process and assess consequent environmental risks arising from sludge disposal as well.

关键词： sulfonamide antibiotics Activated sludge Adsorption Swine wastewater treatment

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

Full-scale evaluation of reversed A^(2)/O process for removal of multiple pollutants in sewage

引用

Chinese Chemical Letters 2020年第10期31卷 2825-2830页

作者： Qihang Wu Haiyan Li Xiaodong Hu Yongfeng Shi Deguan Kong Yucheng Zhang Bixian Mai Dongye Zhao Jie Fu Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China School of Civil Engineering Guangzhou UniversityGuangzhou 510006China School of Civil and Architectural Engineering Guizhou University of Engineering ScienceBijie 551700China School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Environmental Engineering Program Department of Civil EngineeringAuburn UniversityAuburnAL 36849United States School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

This study evaluated the removal of multiple pollutants,i.e.,polybrominated diphenyl ethers(PBDEs),novel halogenated flame retardants(HFRs),sulfonamide antibiotics(SAs),and heavy metals(HMs),by a fullscale reversed A^(2)/O process in a sewage treatment plant(STP)in Guangzhou,*** reversed A^(2)/O process demonstrated high removal efficiencies(REs)for total PBDEs(60.5%±4.3%),novel HFRs(98.4%±2.8%)and HMs(70.1%±1.2%),and a relatively low RE for SAs(25.0%±2.3%).BDE 209,the dominant PBDE congener,showed a high residual concentration(13.41±5.18 ng/L)in the suspended particulate matter(SPM)of treated *** me novel HFRs,dechlorane plus(DP)and decabromodiphe nyl ethane(DBDPE),were detected in the SPM of the raw sewage(7.50±4.14 ng/L and 11.52±11.65 ng/L,respectively).The removal ofSAs was mainly through biodegradation in the activated sludge bioreactors(ASBs).Ofthe HMs,Mn and Ni exhibited the lowest REs(47.5%±2.2%and 35.0%±2.6%,respectively),while Cr and Cu showed the highest removal(REs>80%).In terms of treatment units in the reversed A^(2)/O process,ASBs showed the highest RE(27.8%)for the multiple *** information can aid in our understanding of removal properties of STPs on various pollutants and evaluating the ecological/health risks of STPs as point pollutant sources.

关键词： Polybrominated diphenyl ethers Halogenated flame retardants sulfonamide antibiotics Heavy metals Reversed A^2/O process

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

Preparation and electrochemical sensing performance of Ti3C2 MXenes-hybridized hollow AgPt nanowires

Preparation and electrochemical sensing performance of Ti3C2...

引用

河南省化学会2020年学术年会

作者：徐力萍甘甜信阳师范学院化学化工学院

Recently,MXenes,a new type of two-dimensional layered transition metal carbides,nitrides,and carbonitrides,have gained widespread concern as electrode materials,owing to their good electronic conductivity,hydrophilicity,large surface area,and short diffusion path[1].In this work,AgPt alloy nanowires with hollow nanostructure were synthesized and hybridized with lamellar structural TiCMXenes to construct a high-performance electrocatalyst (Fig.1),which can be used for highly sensitive detection of four sulfonamide antibiotics including sulfaguanidine,sulfamethazine,sulfasalazine,and *** the optimum conditions,the voltammetric method using AgPt/TiCMXenes enables determination of all investigated sulfonamide antibiotics in lowμmol/L concentration ranges and achieved detection limits as 0.125,0.119,0.0035,and 0.00689μmol/L for sulfaguanidine,sulfamethazine,sulfasalazine,and trimethoprim,*** tailored structure,fast electron transfer ability,and facile preparation of AgPt/TiCMXenes made it a promising transducer for practical applications in antibiotics sensing.

关键词： Ti3C2 MXenes Hollow AgPt nanowires Electrochemical sensor sulfonamide antibiotics

来源： cnki会议评论

在线全文

cnki会议

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

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

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：