检索结果-南通市图书馆

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

制革含硫废水的好氧生化调质过程研究

应用化工 2025年第1期54卷 50-56页

作者：孙恬马宏瑞陶坤徐芝芬陕西科技大学环境科学与工程学院陕西西安710021 西安优瑞卡环保科技有限公司陕西西安710018

通过探究纯氧氧化、生化氧化和污泥吸附对硫化物的转化影响以及在硫化物存在条件下微生物群落变化,分析了制革含硫废水中硫的生物转化过程及微生物群落响应。结果显示,与好氧生化S^(2-)最高转化率61.0%相比,硫化物纯氧氧化为硫酸盐的转... 详细信息

通过探究纯氧氧化、生化氧化和污泥吸附对硫化物的转化影响以及在硫化物存在条件下微生物群落变化,分析了制革含硫废水中硫的生物转化过程及微生物群落响应。结果显示,与好氧生化S^(2-)最高转化率61.0%相比,硫化物纯氧氧化为硫酸盐的转化率仅为3.7%。停留时间为24 h时,好氧生化过程中S^(2-)的去除率超过98%,75%以上的S^(2-)是通过污泥吸附和生化氧化进行转化的,12.5%~16.5%的S^(2-)通过气体吹脱逸出;同时在好氧生化过程的污泥表面发现有单质硫存在,且大多以硫粒的形态赋存。现场小试证明,即使高浓度的COD_(Cr)和硫化物直接进入系统,平均COD_(Cr)削减率仍达94.4%,但硝化过程受到硫化物毒性的显著影响。微生物群落结构分析显示,制革含硫废水直接生化提升了好氧活性污泥中微生物的生长、繁殖和明显的种群变异,同时在处理过程中形成了较为稳定的生态网络,提高了系统的抗逆性。

关键词：制革含硫废水好氧生化活性污泥微生物群落

Bromate formation during oxidation of bromide-containing water by the CuO catalyzed peroxymonosulfate process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第11期33卷 4786-4791页

作者： Jingxin Yang hongrui ma Chuan Wang Hong Liu Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationInstitute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

Bromate formation has been found in the SO_(4)^(•−)-based oxidation processes,but previous studies primarily focused on the bromate formation in the homogeneous SO_(4)^(•−)-based oxidation *** kinetics and mechanisms of bromate formation are poorly understood in the heterogeneous SO_(4)^(•−)-based oxidation processes,although which have been widely studied in the eliminations of *** this work,we found that the presence of CuO,a common heterogeneous catalyst of peroxymonosulfate(PMS),appreciably enhanced the bromate formation from the oxidation of bromide by *** conversion ratio of bromide to bromate achieved over 85%within 10 min in this *** was demonstrated to play a multiple role in the bromate formation:(1)catalyzed PMS to generate SO_(4)^(•−),which then oxidizes bromide to bromate;(2)catalyzed the formed free bromine to disproportionate to bromate;(3)catalyzed the formed free bromine to decomposed back into *** the CuO-PMS-Br system,bromate formation increases with increasing CuO dosages,initial CuO and bromide concentrations,but decreases with increasing bicarbonate *** presence of NOM(natural organic matter)resulted in a lower formed bromate accompanied with organic bromine ***,CuO catalyzes PMS to transform more than 70%of initial bromide to bromate even after recycled used for six *** formation of bromate in the PMS catalysis by CuO system was also confirmed in real water.

关键词： Bromate Peroxymonosulfate(PMS) CuO SO_(4)^(•−) Bromide Heterogeneous catalyst

Photodegradation of hydroxyfluorenes in ice and water: A comparison of kinetics, effects of water constituents, and phototransformation by-products

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2023年第2期124卷 139-145页

作者： Linke Ge Shengkai Cao Crispin Halsall Junfeng Niu Dongxiao Bai Guangkai He Peng Zhang hongrui ma School of Environmental Science and Engineering Shaanxi University of Science&TechnologyXi’an 710021China Lancaster Environment Centre Lancaster UniversityLancaster LA14YQUK State Environmental Protection Key Laboratory of Coastal Ecosystem National Marine Environmental Monitoring CenterDalian 116023China

The photochemical behavior of organic pollutants in ice is poorly studied in comparison to aqueous *** we report a detailed comparison of ice and aqueous photodegradation of two representative OH-PAHs,2-hydroxyfluorene(2-OHFL)and 9-hydroxyfluorene(9-OHFL),which are newly recognized contaminants in the wider environment including colder ***,their photodegradation kinetics were clearly influenced by whether they reside in ice or *** the same simulated solar irradiation(λ>290 nm),OHFLs photodegraded faster in ice than in equivalent aqueous solutions and this was attributed to the specific concentration effect caused by ***,the presence of dissolved constituents in ice also influenced photodegradation with 2-OHFL phototransforming the fastest in‘seawater’ice(k=(11.4±1.0)×10^(−2) min^(−1))followed by‘pure-water’ice((8.7±0.4)×10^(−2) min^(−1))and‘freshwater’ice((8.0±0.7)×10^(−2) min^(−1)).The presence of dissolved constituents(specifically Cl^(−),NO_(3)^(−),Fe(Ⅲ)and humic acid)influences the phototransformation kinetics,either enhancing or suppressing phototransformation,but this is based on the quantity of the constituent present in the matrixes,the specific OHFL isomer and the matrix type(e.g.,ice or aqueous solution).Careful derivation of key photointermediates was undertaken in both ice and water samples using tandem mass *** phototransformation exhibited fewer by-products and‘simpler’pathways giving rise to a range of hydroxylated fluorenes and hydroxylated fluorenones in *** results are of importance when considering the fate of PAHs and OH-PAHs in cold regions and their persistence in sunlit ice.

关键词： Ice photochemistry Hydroxyfluorene Photodegradation Kinetics Water constituents Intermediates

Advances in the diagnosis and treatment of symptomatic intracranial atherosclerotic disease

在线全文

学校读者我要写书评

暂无评论

Journal of Translational Neuroscience 2024年第4期9卷 1-13页

作者： hongrui ma Xunming Ji Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijing 100053China Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijing 100053China

Intracranial atherosclerotic disease(ICAD)manifests systemic atherosclerosis in the intra-cranial arterial *** is the most common risk factor for ischemic stroke in Chinese population,with symptomatic ICAD(sICAD)patients at higher stroke *** cerebral hypoperfusion and hemodynamic decompensa-tion caused by arterial stenosis or occlusion are the main pathological mechanisms for stroke recurrence and cog-nitive impairment in sICAD *** receiving reinforced medical therapy,about 10%of sICAD patients still suffer stroke *** flow reconstruction techniques are not yet established as routine stroke pre-vention for sICAD due to complex perioperative *** remote ischemic conditioning(LRIC)can effectively reduce the incidence of ischemic stroke,and composite cerebrovascular diseases,and improve ce-rebral perfusion,brain metabolism,and cerebrovascular reserve(CVR)in sICAD patients,serving as a novel ther-apeutic ***,the protective mechanisms of LRIC and the optimal treatment regimen for sICAD still require further *** imaging biomark-ers with high sensitivity and specificity for diagnosis is of great significance in evaluating and predicting stroke risk in sICAD patients.

关键词： intracranial atherosclerotic disease stroke diagnosis treatment hemodynamics

Adsorption and Desorption Behavior of Tannic Acid in Aqueous Solution on Polyaniline Adsorbent

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2013年第6期21卷 594-599页

作者： WANG Jiahong JI Yan fen DING Shaolan ma hongrui HAN Xiaojing Colleze of Resource and Environment Shaaaxi University of Science & Technology Xi'an 710021 China Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry Ministry of Education College ofChemistry and Chemical Engineering Shaanxi University of Science & Technology Xi'an 710021 China

Tannic acid is generally considered as one of polyphenolic pollutants, which may cause severe threats to the environment. In this study, polyaniline adsorbent was synthesized by chemical oxidation to remove tannic acid in aqueous solutions. The adsorption amount of tannic acid varied greatly with pH of solution and strong adsorption was at pH 5.8-6.7. Coexisting cations, such as Na＋, K＋, and Ca2＋, can enhance the adsorption of tannic acid on poly- aniline, which may be contributed to the electrostatic interaction between tannic acid and polyaniline. The adsorp- tion process could be well described by Langmuir model and the maximum adsorption capacity was 117.65 rag.g〈 at 35℃and pH 6.0. The thermodynamic parameters calculated from the adsorption isotherms indicate that the ad- sorption of tannic acid is spontaneous and endothermic process. The polyaniline saturated with tannic acid can be desorbed in alkaline solution and regenerated adsorbent can be used repeatedly with high adsorption capacity, which implies that polyaniline adsorbents have a great potential in water purification for the removal of tannic acid.

关键词： polyaniline adsorption desorption tannic acid

Enrichment of Cd and Pb and associations with grain size in sediments in Nanjing alluvial island of Yangtze River

在线全文

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2006年第B8期25卷 92-93页

作者： hongrui ma Yuqian maO Junfeng JI Qiling LIAO Shunsheng HUANG Department of Earth Sciences Nanjing University Nanjing 210093 China Geological Survey of Jiangsu Province Nanjing 210018 China

Visible and near infrared reflectance spectroscopy for measuring soil heavy metal content as a quick method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2006年第B08期25卷 225-226页

作者： Yunzhao WU Jun CHEN Junfeng JI Peng GONG Qilin LIAO hongrui ma State Key Lab of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China Department of Earth Science Nanjing University Nanjing 210093 China Geological Survey of Jiangsu Province Nanjing 210093 China

Zr(OH)_4沉淀物对铬鞣废水Cr^(3+)的吸附实验

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

环境化学 2013年第1期32卷 118-124页

作者：马宏瑞连坤宙马秀陕西科技大学资源与环境学院西安710021

用Zr(OH)4模拟锆鞣废水中的沉淀物作为吸附剂处理低浓度铬鞣废水,考察了吸附时间、Zr(OH)4投加量、溶液pH值、盐离子(Na+、Ca2+)浓度等因素对Cr3+去除效果的影响,结果表明,在pH4.5后,为沉淀和吸附混合过程;Cr3+在Zr(OH)4上的吸附过程可... 详细信息

用Zr(OH)4模拟锆鞣废水中的沉淀物作为吸附剂处理低浓度铬鞣废水,考察了吸附时间、Zr(OH)4投加量、溶液pH值、盐离子(Na+、Ca2+)浓度等因素对Cr3+去除效果的影响,结果表明,在pH4.5后,为沉淀和吸附混合过程;Cr3+在Zr(OH)4上的吸附过程可以用Freundlich模型进行模拟;Na+和Ca2+对铬的吸附有一定的抑制作用.实际锆鞣废水中的杂质成分与Cr3+产生竞争吸附,使去除率略有降低,最低去除率可达71.29%以上.

关键词：锆鞣制废水 Cr3+ 吸附

在线全文

学校读者我要写书评

暂无评论

成对电—三维电极电解染料废水

水处理技术 2012年第3期38卷 114-117页

作者：田建慧马宏瑞陕西科技大学资源与环境学院陕西西安710021

以酸性大红3R模拟高酸高氯染料废水为研究对象,通过成对电-三维电极氧化技术,水气循环处理染料废水;实际考察了pH、NaCl质量浓度、电流密度、电解时间等对电解效果的影响,并对电解机理做了初步探讨。结果表明,水流速度3.2 ***-1,电流密... 详细信息

以酸性大红3R模拟高酸高氯染料废水为研究对象,通过成对电-三维电极氧化技术,水气循环处理染料废水;实际考察了pH、NaCl质量浓度、电流密度、电解时间等对电解效果的影响,并对电解机理做了初步探讨。结果表明,水流速度3.2 ***-1,电流密度100 ***-2,经过电解8 h,废水COD去除率达80%,色度去除率95%,废水中的有机物得到了有效地降解,为工程化处理高酸高氯废水提供依据。

关键词：活性氯电解酸性染料废水