检索结果-南通市图书馆

Advanced treatment of wet-spun acrylic fiber manufacturing wastewater using three-dimensional electrochemical oxidation

引用

Journal of Environmental Sciences 2016年第12期28卷 21-31页

作者： Tianlong Zheng, qunhui wang Zhining Shi Yue Fang Shanshan Shi Juan wang Chuanfu Wu Department of Environmental Engineering University of Science and Technology Beijing Beijing 100083 China. Beijing Key Laboratory on Resource-oriented Treatment of lndustrial Pollutants University of Science and Technology Beijing Beijing 100083 China School of Earth and Environmental Sciences The University of Adelaide South Australia 5005 Australia

A three-dimensional electrochemical oxidation （3D-EC） reactor with introduction of activated carbon （AC） as particle micro-electrodes was apphed for the advanced treatment of secondary wastewater effluent of a wet-spun acrylic fiber manufacturing plant. Under the optimized conditions （current density of 500 A/m2, circulation rate of 5 mL/min, AC dosage of 50 g, and chloride concentration of 1.0 g/L）, the average removal efficiencies of chemical oxygen demand （CODer）, NH3-N, total organic carbon （TOC）, and ultraviolet absorption at 254 nm （UV2s4） of the 3D-EC reactor were 64.5%, 60.8%, 46.4%, and 64.8%, respectively; while the corresponding effluent concentrations of CODcr, NH3-N, TOC, and UV2s4 were 76.6, 20.1, and 42.5 mg/L, and 0.08 Abs/cm, respectively. The effluent concentration of CODer was less than 100 mg/L, which showed that the treated wastewater satisfied the demand of the integrated wastewater discharge standard （GB 8978-1996）. The 3D-EC process remarkably improved the treatment efficiencies with synergistic effects for CODer, NH3-N, TOC, and UV2s4 during the stable stage of 44.5%, 38.8%, 27.2%, and 10.9%, respectively, as compared with the sum of the efficiencies of a two-dimensional electrochemical oxidation （2D-EC） reactor and an AC adsorption process, which was ascribed to the numerous micro-electrodes of AC in the 3D-EC reactor. Gas chromatography mass spectrometry （GC-MS） analysis revealed that electro- chemical treatment did not generate more toxic organics, and it was proved that the increase in acute biotoxicity was caused primarily by the production of free chlorine.

关键词： Advanced treatment Synergistic effect Three-dimensional electrochemicaloxidation Wet-spun acrylic fiber wastewater

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

Pilot-scale experiments on multilevel contact oxidation treatment of poultry farm wastewater using saran lock carriers under different operation model

引用

Journal of Environmental Sciences 2019年第3期31卷 336-345页

作者： Tianlong Zheng Peng Li Xiaoyu Ma Xiaohong Sun Chuanfu Wu qunhui wang Ming Gao State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Department of Environmental Engineering University of Science and Technology Beijing Xinkai Water Environmental Investment Co.Ltd Beijing Agro-Biotechnology Research Center Beijing Academy of Agriculture and Forestry Sciences

A pilot-scale multilevel contact oxidation reactors system, coupled with saran lock carriers,was applied for the treatment of poultry farm wastewater. The removal efficiencies of CODcr, ammonia, and the total nitrogen as well as the elimination performance of CODcr and total nitrogen along the three-level contact oxidation tanks under six designed operational models were investigated. Based on the performance of the nitrogen removal of the saran lock carriers and the distribution of anoxic–aerobic interspace under the suitable operation model, the mechanism of nitrogen removal of the system was also explored. The results revealed that the intermittent aeration under parallel model is the most suitable operation model, while the removal efficiencies of CODcr, ammonia, and the total nitrogen were 86.86%, 84.04%, and 80.96%, respectively. The effluent concentration of CODcr,ammonia, and the total nitrogen were 55.6 mg/L, 8.3 mg/L, and 12.0 mg/L, which satisfy both the discharge standard of pollutants for livestock and poultry breeding industry(GB18596–2001) and the first grade of the integrated wastewater discharge standard(GB 8978–1996). Moreover, the mechanism for the nitrogen removal should be attributed to the plenty of anoxic–aerobic interspaces of the biofilm and the three-dimensional spiral structure of the saran lock carriers, where the oxygen-deficient distribution was suitable for the happening of the simultaneous nitrification and denitrification process. Therefore, the multilevel contact oxidation tanks system is an effective pathway for the treatment of the poultry farm wastewater on the strength of a suitable operation model and novel carriers.

关键词： Multilevel contact oxidation tanks Nitrogen removal Mechanism Operation model Poultry farm wastewater Saran lock carriers

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

Pollution characteristics of polycyclic aromatic hydrocarbons in common used mineral oils and their transformation during oil regeneration

引用

Journal of Environmental Sciences 2017年第6期29卷 247-253页

作者： Xiaohui Wu Bo Yue Yi Su Qi Wan Qifei Huang qunhui wang Hongying Cai State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012China Civil and Environmental Engineering Institute University of Science and Technology BeijingBeijing 100083China The Solid Waste Management Center of Chongqing Chongqing 401147China

The pollution characteristic of polycyclic aromatic hydrocarbons （PAHs） in common used mineral oils, semi-refined oils, refined oils and solid wastes produced during the used mineral oil regeneration process was analyzed. The results showed that total PAHs content in six common used mineral oils was as follows： used engine oil 〉 used quenching oil 〉 used casting oil 〉 used hydraulic oil 〉 used antimst oil 〉 used industrial lubricating oil. Furthermore, this order was dependent on the source of PAHs and oil working temperatures. Additionally, total PAt-Is content in regenerated oils was as follows： semi-refined oil 〉 refined oil 〉 crude oil, which was related to the catalytic cracking process of crude oil and adsorption refining process of semi-refined oil. The ranking of total PAHs content in regenerated wastes varied depending on the regeneration technology used as follows： waste adsorption sand 〉 acid sludge 〉 waste clay 〉 precipitation sludge 〉 cracked residue. In all types of used mineral oils and regenerated wastes, the maximum and minimum proportions of the total PAHs content were composed of 2-3 ring-PAHs and 5-6 ring-PAHs, respectively. The majority of PAHs in the used mineral oils entered into regenerated wastes during regeneration process, while a small number remained in the regenerated oil.

关键词： Used mineral oilPAHsPollution characteristicsRegenerationTransformation

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

Cathode catalyst prepared from bacterial cellulose for ethanol fermentation stillage treatment in microbial fuel cell

引用

Chinese Journal of Chemical Engineering 2021年第12期34卷 256-261页

作者： Huiyu Li Ming Gao Pan wang Hongzhi Ma Ting Liu Jin Ni qunhui wang Tien-Chin Chang Department of Environmental Engineering University of Science and Technology BeijingBeijing Key Laboratory of Resource-oriented Treatment of Industrial PollutantsBeijing 100083China Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry Beijing Technology and Business UniversityBeijing 100048China Institute of Environmental Engineering and Management National Taipei University of TechnologyTaipei 106China

Bacterial cellulose doped with P and Cu was used as a catalyst for a microbial fuel cell(MFC) cathode,which was then used to treat ethanol fermentation stillage from food waste.Corresponding output power,coulombic efficiency(CE),and biological toxicity were detected.Through a series of characterization experiments,the addition of the cathode catalyst was found to improve catalytic activity and accelerate the consumption of the substrate.The resulting maximum output power was 572.16 mW·m^(-2).CE and the removal rate of chemical oxygen demand(COD) in the fermentation stillage by P-Cu-BC reached 26% and 64.5%,respectively.The rate of biotoxicity removal by MFC treatment reached 84.7%.The aim of this study was apply a novel catalyst for MFC and optimize the treatment efficiency of fermentation stillage.

关键词： Microbial fuel cell Oxygen reduction reaction Fermentation Catalyst Biomass Biotoxicity

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

Sludge reduction during brewery wastewater treatment by hydrolyzation-food chain reactor system

引用

Frontiers of Environmental Science & Engineering 2008年第1期2卷 32-35页

作者： Lijie LI qunhui wang Xuesong LI Shuo YANG Department of Environmental Engineering University of Science and Technology BeijingBeijing 100083China Department of Environmental Science&Engineering Harbin Institute of TechnologyHarbin 150090China

During brewery wastewater treatment by a hydrolyzation-food chain reactor(FCR)system,sludge was recycled to the anaerobic segment.With the function of hydrolyzation acidification in the anaerobic segment and the processes of aerobic oxidation and antagonism,preda-tion,interaction and symbiosis among microbes in multi-level oxidation segment,residual sludge could be reduced effectively.The 6-month dynamic experiments show that the average chemical oxygen demand(COD)removal ratio was 92.6% and average sludge production of the aerobic segment was 8.14%,with the COD of the influent at 960–1720 mg/L and hydraulic retention time(HRT)of 12 h.Since the producedsludge could be recycled and hydrolyzed in the anaerobic segment,no excess sludge was produced during the steady running for this system.

关键词： hydrolyzation multilevel oxidation excess sludge reduction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wastewater-nitrogen removal using polylactic acid/starch as carbon source： Optimization of operating parameters using response surface methodology

引用

Frontiers of Environmental Science & Engineering 2016年第4期10卷 137-146页

作者： Yan GUO Chuanfu WU qunhui wang Min YANG Qiqi HUANG Markus MAGEP Tianlong ZHENG School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China

Nitrogen removal from ammonium-containing wastewater was conducted using polylactic acid （PLA）/ starch blends as carbon source and carrier for fimctional bacteria. The exclusive and interactive influences of operating parameters （i.e., temperature, pH, stirring rate, and PLA-to-starch ratio （PLA proportion）） on nitrification （Y1）, denitrification （Y2）, and COD release rates （Y3） were investigated through response surface methodology. Experimental results indicated that nitrogen removal could be successfully achieved in the PLA/starch blends through simultaneous mtnncatlon anti clenltnncatlon. The carbon release rate of the blends was controllable. The sensitivity of Y1, Y2, and Y3 to different operating parameters also differed. The sequence for each response was as follows： for Y1, pH 〉 stirring rate 〉 PLA proportion 〉 temperature; for Y2, PH 〉 PLA proportion 〉.temperature.〉 stirring rate; and for Y3, stirring rate 〉pH 〉 PLA proportion 〉 temperature. In this study, the following optimum conditions were observed： temperature, 32.0℃; pH 7.7; stirring rate, 200.0 r · min^-1 and PLA proportion 0.4. Under these conditions Y1 Y2 and Y3 were 134.0 μg-N·g-blend^-1·h^-1, 160.9μg-N-g-blend^-1·h^-1, and 7.6 × 10^3 μg-O·g-blend^-1·h^-1, respectively. These results suggested that the PLA/starch blends may be an ideal packing material for nitrogen removal.

关键词： Nitrogen removal Polylactic acid Starch Carbon source Response surface methodology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

和田河流域水化学特征与地下水补给来源分析

引用

干旱区研究 2024年第6期41卷 917-927页

作者：李小等常亮段瑞王倩张群慧杨炳超中国地质调查局西安地质调查中心陕西西安710054 中国地质调查局乌鲁木齐自然资源综合调查中心新疆乌鲁木齐830000 中国地质调查局干旱-半干旱区地下水与生态重点实验室陕西西安710054

为研究和田河流域水化学与地下水补给特征,采用SPSS数理统计分析、Piper三线图、Gibbs图解以及氢氧和14C同位素示踪等方法对不同地貌单元中的水体(井水、坑塘水和河水)进行了水化学组成特征、补给来源和转化关系分析。结果表明:(1)各水... 详细信息

为研究和田河流域水化学与地下水补给特征,采用SPSS数理统计分析、Piper三线图、Gibbs图解以及氢氧和14C同位素示踪等方法对不同地貌单元中的水体(井水、坑塘水和河水)进行了水化学组成特征、补给来源和转化关系分析。结果表明:(1)各水体主要起源于南部海拔2000 m以上的中高山区冰雪融水和大气降水。从山区到沙漠区,地下水水化学类型具有较明显的分带特征。不同水体pH值均呈弱碱性,离子之间组分和TDS值差异较大,整体呈坑塘水>井水>河水的规律。少数地下水样点中NO3-含量显著异常。(2)砾质平原区地下水大量接受地表河水的垂向脱节型补给。地下水溶解性总固体(TDS)值小,更新速度快,以水岩溶滤控制作用为主,水化学类型多呈SO4·Cl-Ca·Mg型。(3)细土平原区地下水TDS值变幅大,多为Cl·SO_(4)-Na型。其中,河间地块内,靠近上游地下水接受地表水及邻区侧向径流补给,14C年龄小;中下游地区地下水氢氧同位素“氧漂移”现象普遍。分水岭处地下水14C年龄大,近河岸处年龄小,地下水与河水联系密切。河间地块两侧地下水分别沿东北、西北方向径流,最终排泄于外围沙漠区。研究结果可为和田河流域水资源合理开发利用和生态环境保护提供科学理论依据。

关键词：水化学地下水补给来源同位素和田河流域

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

园林废弃物对滨海盐渍土固碳减排效应与微生物群落结构的影响

引用

环境工程 2024年第1期42卷 95-101页

作者：李婧男汪群慧梁宝瑞王万清刘俊杰北京科技大学天津学院环境工程系天津301830 北京科技大学能源与环境工程学院北京100083

为了探讨发酵园林废弃物对盐渍土性质的影响及其固碳减排效应,利用大田试验,设置发酵园林废弃物施用(T1)、混施膨润土(T2)与对照(CK)3组处理。通过土壤pH、EC、总孔隙度、饱和导水率、速效氮磷钾、有机碳储量变化(ΔSOC)、微生物量碳(M... 详细信息

为了探讨发酵园林废弃物对盐渍土性质的影响及其固碳减排效应,利用大田试验,设置发酵园林废弃物施用(T1)、混施膨润土(T2)与对照(CK)3组处理。通过土壤pH、EC、总孔隙度、饱和导水率、速效氮磷钾、有机碳储量变化(ΔSOC)、微生物量碳(MBC)、细菌与真菌群落结构揭示其变化规律。结果表明:园林废弃物堆肥相比于传统焚烧处理可减少53%碳排放,发酵园林废弃物的施用可使ΔSOC增加5~24倍。T1、T2组处理的土壤容重与EC显著低于CK组,总孔隙度和饱和导水率显著高于CK组。T2的养分含量最高,土壤有机质和速效氮的含量均为CK组的2倍,堆肥与膨润土混施可显著提高土壤养分含量,改良效果显著高于其他处理。发酵园林废弃物的施用还可以改变微生物群落结构,变形菌门、放线菌门、拟杆菌门、绿弯菌门、芽单孢菌门和酸杆菌门为主要的优势菌。真菌中子囊菌门、担子菌门、壶菌门、被孢霉门为主要的优势菌。Pearson相关分析也表明:酸杆菌门和放线菌门与有机碳储量、微生物量碳、土壤养分等呈显著正相关,与土壤盐分、容重呈显著负相关。

关键词：园林废弃物盐渍土微生物群落结构固碳减排

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

和田河中下游流域地下水水化学特征及其演化规律

引用

干旱区地理 2024年第5期47卷 753-761页

作者：李小等常亮段瑞王倩杨泽东张群慧张鹏伟中国地质调查局西安地质调查中心陕西西安710054 中国地质调查局乌鲁木齐自然资源综合调查中心新疆乌鲁木齐830057 中国地质调查局干旱-半干旱区地下水与生态重点实验室陕西西安710054

为研究和田河中下游流域地下水水化学特征及其演化规律,采用Piper三线图、Gibbs图、PHREEQC软件和数理统计等方法对该地区水化学特征、主要溶质组分来源和演化规律开展了综合研究分析。结果表明:(1)地下水中八大常规离子含量整体偏高,... 详细信息

为研究和田河中下游流域地下水水化学特征及其演化规律,采用Piper三线图、Gibbs图、PHREEQC软件和数理统计等方法对该地区水化学特征、主要溶质组分来源和演化规律开展了综合研究分析。结果表明:(1)地下水中八大常规离子含量整体偏高,尤其是Cl^(-)、SO_(4)^(2-)、Na^(+)、Ca^(2+)和HCO_(3)^(-)占比较大。(2)水化学溶解组分空间差异性明显,除少部分地区水化学类型表现为SO4·Cl-Ca·Mg型外,大部分均以SO^(4)·Cl^(-)Na型为主。地下水呈弱碱性,大部分地区水样点水质基本满足生活饮用水标准。部分绿洲平原区受人类生产活动影响,水中NO_(3)^(-)含量明显异常。(3)在水-岩作用和阳离子交换作用下,地下水中Na+、Ca2+、Mg^(2+)、Cl^(-)、SO_(4)^(2-)等离子组分主要物质来源于岩盐、方解石、白云石和石膏等矿物的溶解。在向下游细土平原和沙漠区径流过程中,受蒸发浓缩作用普遍控制影响,水中各离子浓度含量不断增大。(4)在开放性较好的系统环境中,CO_(2)促进了各矿物的溶解,使得地下水中各离子含量不断溶解聚集,浓度增大。进入下游冲积平原区后,受细粒砂土介质层阻隔影响,地下水径流与交替强度减弱导致溶滤作用变差,蒸发浓缩作用逐渐占主导地位,进一步加大了水中离子含量和水化学类型的差异性。研究结果可为和田河流域水资源合理开发利用和生态环境保护提供理论依据。

关键词：水化学特征水文地球化学水-岩作用地下水和田河流域

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

Icotinib, an EGFR-TKI, for the treatment of brain metastases in non-small cell lung cancer:a retrospective study

引用

Oncology and Translational Medicine 2016年第6期2卷 268-274页

作者： qunhui wang Hua Zheng Ying Hu Baohua Lu Fanbin Hu Hongmei Zhang Baolan Li Department of Oncology Beijing Chest Hospital Capital Medical University

Objective Treatment of brain metastases from non-small cell lung cancer(NSCLC) is a challenge because of the poor prognosis. Icotinib is a new type of oral epidermal growth factor receptor(EGFR) tyrosine kinase inhibitor(TKI) used in the treatment of advanced NSCLC. The aim of this study was to evaluate the efficacy of icotinib in NSCLC patients with brain metastasis.Methods This study reviewed records of 51 NSCLC patients with brain metastases who took icotinib 125 mg, 3 times a day. Response rate, progression free survival, and overall survival were analyzed. SPSS software version 17.0 was used for univariate analysis, and Cox regression analysis to analyze factors affecting survival. Results Thirty-six cases had partial response, 6 cases had stable disease, and 10 cases had progressive disease. In 31 cases, EGFR gene mutation test were performed. EGFR was mutated in 26 cases and was with wild-type in 5 cases. In patients with EGFR mutations, 23 patients responded to icotinib [the disease control rate(DCR) was 88.5%], significantly higher than in patients with wild-type EGFR(1 patient, DCR 20%)(P = 0.005). The overall median progression-free survival(PFS) was 7.6 months. PFS was longer in the patients with EGFR mutations than in those with wild type EGFR(7.8 months vs 1.2 months, P = 0.03). The overall median overall survival(OS) time was 10.7 months. OS was longer in patients with EGFR mutations than in those with wild type EGFR(15.1 months vs 6.7 months, P = 0.003). The main side effects of the treatment were skin rash and diarrhea; no stage 3 or 4 toxic effects occurred. Univariate analysis demonstrated that OS was related to sex, Eastern Cooperative Oncology Group performance status(ECOG PS), smoking history, and EGFR mutation. Multivariate analysis showed that OS was independently related to sex, ECOG PS, and EGFR mutations.Conclusion Icotinib has a favorable effect on NSCLC patients with brain metastases harboring EGFR mutations. Icotinib can be a new choice of treatment for brain metastases in patients w

关键词： non-small cell lung cancer(NSCLC) brain metastases icotinib epidermal growth factor receptor(EGFR)

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

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

在线全文

在线全文

在线全文

在线全文

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

在线全文

在线全文

在线全文

在线全文

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：