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Gas-liquid-liquid extraction in a novel rotating microchannel extractor

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Chinese Journal of Chemical Engineering 2020年第10期28卷 2523-2532页

作者： Rui Ma Chunxin Fan Yubin Wang Jianhong Luo Jun Li sridhar komarneni Department of Chemical Engineering Sichuan UniversityChengdu 610065China Department of Ecosystem Science and Management and Materials Research Institute 204 Energy and the Environment LaboratoryThe Pennsylvania State UniversityUniversity ParkPA 16802USA

In this work,a novel rotating microchannel extractor(RME)is designed and further used for the extraction of chromium(Ⅲ)from ***,the micro-extraction had the same effect as carrying out 2.9-stage cross-flow *** factors,including the gas intake methods,gas intake quantity(Qg),distance between inner rotor and outer wall(D),rotational inner rotor speed(R)and volumetric flow rate(Qa,Qo),were selected to investigate their effect on the extraction efficiency(η)*** relation map ofηwith Weaand We(o-g)for RME provides a comprehension for the gas–liquid–liquid extraction process in this RME system.

关键词： Microextraction Gas–liquid–liquid Rotating microchannel extractor Mass transfer Extraction efficiency

How heteroatoms(Ge,N,P) improve the electrocatalytic performance of graphene:theory and experiment

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Science Bulletin 2018年第3期63卷 155-158页

作者： Guojing Chang Jun Ren Xilin She Kewei Wang sridhar komarneni Dongjiang Yang Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province School of Environmental Science and EngineeringQingdao University School of Chemical and Environmental Engineering North University of China Materials Research Institute and Department of Ecosystem Science and Management and 204 Materials Research Laboratory The Pennsylvania State University Queensland Micro- and Nanotechnology Centre (QMNC) Griffith University

The oxygen reduction reactions(ORR)play a crucial role in the electrochemical energy storage devices,such as fuel cell,metal-air batteries[1–3].However,their larger scale applications are hindered by the sluggish slo... 详细信息

关键词：实验表演金属空气电池存储设备电气化学催化剂动力学过电位

In situ stabilization of arsenic in soil with organoclay,organozeolite,birnessite,goethite and lanthanum-doped magnetic biochar

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Pedosphere 2022年第5期32卷 764-776页

作者： Saeed BAGHERIFAM Trevor C.BROWN Christopher M.FELLOWS Ravi NAIDU sridhar komarneni Chemistry-School of Science and Technology University of New EnglandArmidale NSW 2351(Australia) Global Centre for Environmental Remediation Faculty of Science and Information TechnologyUniversity of NewcastleUniversity DriveCallaghan NSW 2308(Australia) Department of Ecosystem Science and Management and Materials Research Institute 204 Energy and the Environment LaboratoryPennsylvania State UniversityUniversity Park PA 16802(USA)

Arsenic(As)is a known carcinogen and naturally occurring semi-metal in soils and in the Earth's *** of soils and water with As poses a serious threat to millions of people worldwide due to its health hazards and toxicological ***,devising novel and efficient methods for remediation of contaminated areas has attracted a great deal of interest across the *** this study,we investigated the usefulness of synthetic birnessite,goethite,hexadecylpyridinium chloride-modified montmorillonite(HDPC-M),hexadecylpyridinium bromide-modified zeolite(HDPB-Z),and lanthanum(La)-doped magnetic biochar produced from eucalyptus bark(La-Euchar)as adsorbents at 10%dosage for As stabilization in a soil spiked with 1000 mg kg^(-1)*** effectiveness of the above adsorbents in As immobilization in soil was assessed using single-step extractions with 2 mol L^(-1)HNO_(3)and deionized water,the simplified bioaccessibility extraction test(SBET)method,and sequential extraction with the modified Community Bureau of Reference(BCR)*** of the adsorbents shifted the exchangeable fraction of As to more recalcitrant fractions and dramatically reduced the exchangeable fraction by 6%-99%and the extractable amounts with HNO_(3),deionized water,and SBET method by 30%-92%,17%-95%,and 12%-90%,respectively,compared to the unamended *** immobilizing effects of adsorbents on As decreased in the sequence of birnessite>La-Euchar>goethite>HDPB-Z>*** exhibited great affinity for As and drastically reduced As extractability by more than 90%in all single *** results revealed that HDPC-M,HDPB-Z,La-Euchar,birnessite,and goethite are promising immobilizing agents for in situ stabilization of As in terrestrial environments.

关键词： adsorbent bioaccessibility bioavailability environmental contamination immobilizing agent modified biochar modified clay remediation technique

W/W型PAM–MMT乳液的制备及性能研究

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工程科学与技术 2019年第2期51卷 193-198页

作者：邱静红 komarneni sridhar 成煦王海波杜宗良四川大学轻纺与食品学院四川成都610065 宾夕法尼亚州立大学材料研究所宾夕法尼亚16803

为了提高以明胶为稳定剂分散聚合制备的聚丙烯酰胺"水包水"(W/W型PAM)乳液的絮凝性能,首先,采用阳离子单体甲基丙烯酰氧乙基三甲基氯化铵(methacrylatoethyl trimethyl ammonium chloride, DMC)对钠基蒙脱土(sodium-montmorillonite, Na... 详细信息

为了提高以明胶为稳定剂分散聚合制备的聚丙烯酰胺"水包水"(W/W型PAM)乳液的絮凝性能,首先,采用阳离子单体甲基丙烯酰氧乙基三甲基氯化铵(methacrylatoethyl trimethyl ammonium chloride, DMC)对钠基蒙脱土(sodium-montmorillonite, Na–MMT)进行插层改性制备有机蒙脱土(organic montmorillonite, OMMT),通过X射线衍射(X-ray diffraction, XRD)测试得到插层改性后蒙脱土的层间距由1.25 nm增加至1.43 nm,说明DMC单体已经成功插层进入蒙脱土片层。然后,将OMMT引入以明胶为稳定剂的W/W型PAM乳液的体系中,以制备W/W型PAM–MMT乳液。通过透射电镜(transmission electron microscope, TEM)乳液微观形貌进行观察,得到乳液结构是由以蒙脱土颗粒为"交联点"的聚丙烯酰胺高分子网络和W/W型PAM乳液的混合体。研究了OMMT用量、明胶浓度、体系pH值以及阳离子单体DMC添加比例对合成W/W型PAM–MMT乳液性能的影响规律。结果显示:在适宜条件下合成的乳液均具有较好的储存稳定性和在水中的再分散性。乳液的表观黏度和絮凝性能都与OMMT和明胶用量呈正相关性;当pH值在明胶等电点(isoelectric point,IEP)时,得到的乳液的表观黏度最低,絮凝效果最好;随着DMC单体用量比例增大,乳液表观黏度减小,高岭土悬浮液的絮凝效果先增大后减小。

关键词：分散聚合 “水包水”乳液蒙脱土明胶

Electronic Structure Tuning in Ni3FeN/r-GO Aerogel toward Bifunctional Electrocatalyst for Overall Water Splitting

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Electronic Structure Tuning in Ni3FeN/r-GO Aerogel toward Bi...