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光合细菌强化高浓度酵母废水厌氧生物处理效果研究 预览
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作者 李友明 薛宇慧 +2 位作者 葛广德 胡永玫 侯轶 《农业工程学报》 EI CAS CSCD 北大核心 2019年第9期214-220,共7页
高浓酵母废水的厌氧生物处理效率对废水处理系统的运行成本和经济可行性具有至关重要的作用。该文采用光合细菌强化厌氧污泥的方法处理酵母废水,考察了废水在厌氧处理前后的化学需氧量、色度变化以及光合细菌加入前后微生物的OTU分布、... 高浓酵母废水的厌氧生物处理效率对废水处理系统的运行成本和经济可行性具有至关重要的作用。该文采用光合细菌强化厌氧污泥的方法处理酵母废水,考察了废水在厌氧处理前后的化学需氧量、色度变化以及光合细菌加入前后微生物的OTU分布、厌氧污泥细菌的物种门类、污泥古菌聚类结果序列数量的变化。结果表明:光合细菌加入后,单段厌氧反应器处理酵母废水化学需氧量和色度去除率分别由原来的58.20%、47.50%显著提升至 75.12%和62.04%,光合细菌强化厌氧生物处理过程效果明显。微生物多样性分析发现在厌氧污泥驯化和添加光合细菌强化过程中,优势菌种不断累积,特异性增强,物种门类数目减少。光合细菌与其他异养细菌存在共生关系,加入光合细菌后污泥中产甲烷优势群落微生物明显增多,从而提高厌氧系统的处理效果。研究结果为高浓工业有机废水的有效处理提供了参考。 展开更多
关键词 废水 废水处理 光合细菌 厌氧处理工艺 微生物多样性
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醋酯废水除磷生产试验研究 预览
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作者 钱斐斐 曹红 +5 位作者 翟天兵 李晓东 司有银 严建 费晓东 朱丛静 《环境与发展》 2019年第1期94-96,共3页
本文在认真分析废水生化处理过程的基础上,结合开发低碱性除磷剂,研究开发醋酯废水化学法高效除磷工艺。结合减少调节用碱和醋酸等有机物在曝气过程中分解带来pH值上升等特点,化学法高效除磷工艺侧重于在混合废水经充分曝气处理后投放... 本文在认真分析废水生化处理过程的基础上,结合开发低碱性除磷剂,研究开发醋酯废水化学法高效除磷工艺。结合减少调节用碱和醋酸等有机物在曝气过程中分解带来pH值上升等特点,化学法高效除磷工艺侧重于在混合废水经充分曝气处理后投放低碱性除磷剂,在废水pH值8-9下生成沉淀,加酰胺类絮凝剂絮凝成污泥。生产试验表明,高效除磷工艺适合处理醋酯废水,在正常生产工况下,少加碱甚至不加碱,使用1.5‰左右的低碱性除磷剂,总磷去除率不低于82%,能够使废水总磷由40mg/L左右降至8mg/L左右;从试验情况看,增加除磷剂用量至2.5‰以上时,总磷去除率能够达到90%以上,能够使废水总磷降得更低,但除磷成本明显上升。开展化学法高效除磷工艺试验后,出水COD由试验前平均107.5mg/L下降至52.5mg/L,出水SS由均值89.3mg/L下降50.6mg/L,出水池水由淡褐色转为淡绿色。由此可见,化学法高效除磷工艺的运用将全面提高醋酯废水处理技术。 展开更多
关键词 醋酯 废水 低碱性除磷剂 化学法高效除磷工艺
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Hydrological and economic feasibility of mitigating a stressed coastal aquifer using managed aquifer recharge: a case study of Jamma aquifer, Oman
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作者 Mustafa EL-RAWY Ali AL-MAKTOUMI +2 位作者 Slim ZEKRI Osman ABDALLA Rashid AL-ABRI 《干旱区科学:英文版》 SCIE CSCD 2019年第1期148-159,共12页
This study explored the hydrological and economic feasibility of managed aquifer recharge(MAR) using tertiary treated wastewater(TWW) to mitigate salinity in the coastal aquifer of Jamma, Oman. A steady-state groundwa... This study explored the hydrological and economic feasibility of managed aquifer recharge(MAR) using tertiary treated wastewater(TWW) to mitigate salinity in the coastal aquifer of Jamma, Oman. A steady-state groundwater flow and transport model, using MODFLOW software, was developed and calibrated. Different managerial scenarios were simulated and the results reveal that the Jamma aquifer will be further deteriorated in the next 20 a if it remains unmanaged. The groundwater table will decline further by more than 3 m on average;and the iso-concentration salinity line of 1500 mg/L will advance 2.7 km inland, which will severely affect the farming activities in the area. However, MAR using TWW when integrated with the management of groundwater abstraction(e.g., using modern irrigation systems to reduce the abstraction rate) becomes hydrologically feasible to augment the aquifer storage and control seawater intrusion, and hence improves the farming activities. The results indicate that:(1) injecting TWW in the vicinity of irrigation wells(Scenario A2);(2) investing in smart water meters and online control of pumping from the wells to reduce the abstraction rate by 25%(Scenario B);and(3) a combination of both(Scenario B2) are feasible scenarios with positive net present values. Recharge in upstream areas is found not economically feasible because of the very high investment cost of the installation of pipes to transport the TWW over a distance of 12.5 km. Because of securing funds are challenging, Scenario B would be the best option and the second-best option is Scenario A2. Scenario B2 has the lowest net benefit investment ratio and is very attractive because it entails integrated demand and supply management of groundwater. It is required to reduce pumping and to invest in injecting TWW to improve groundwater quality in the vicinity of irrigation wells and to form a hydrological barrier to control seawater intrusion in the long run. 展开更多
关键词 managed AQUIFER RECHARGE treated WASTEWATER SALINITY line COASTAL AQUIFER Oman
折点氯化法除钨冶炼厂氨氮废水研究 预览
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作者 陈星宇 马鑫铭 +4 位作者 史明 唐忠阳 刘旭恒 黄少波 赵中伟 《中国钨业》 CAS 2019年第1期45-49,69共6页
钨冶炼过程中产生大量氨氮废水,直接排放对环境造成破坏。研究采用折点氯化法处理钨冶炼厂排放的氨氮废水,研究了反应时间、初始氨氮浓度、p H值、温度对于模拟废水的氨氮脱除效果的影响,以及折点氯化法工业化应用的效果。模拟氨氮废水... 钨冶炼过程中产生大量氨氮废水,直接排放对环境造成破坏。研究采用折点氯化法处理钨冶炼厂排放的氨氮废水,研究了反应时间、初始氨氮浓度、p H值、温度对于模拟废水的氨氮脱除效果的影响,以及折点氯化法工业化应用的效果。模拟氨氮废水试验结果表明,当pH值为11时,试验效果最好:在45 min后,反应到达折点,氨氮浓度降至5.3 mg·L^-1,氯气利用率在95%左右。而温度和初始浓度两个因素对氨氮脱除无明显影响。折点氯化法工业试验结果表明:不同浓度(801 800 mg·L^-1)的钨冶炼厂废水经过折点氯化法处理后,氨氮均能够降低到15 mg·L^-1以下,且到达折点时Cl2与NH3-N的质量比为7.8。 展开更多
关键词 折点氯化法 氨氮 废水 氯气利用率
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废水水质检测化验误差与质控研究 预览
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作者 段文峰 《云南化工》 CAS 2019年第5期71-72,74共3页
针对废水水质检测化验误差,在简单叙述误差的本质、分类和产生原因基础上,提出能有效控制误差产生的质量控制措施,以此为实际的检测化验工作提供可靠参考依据。
关键词 废水 检测化验 误差 质量控制
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Antibiotic Resistance Genes in the Human-Impacted Environment:A One Health Perspective
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作者 James M. TIEDJE WANG Fang +5 位作者 Celia M. MANAIA Marko VIRTA SHENG Hongjie MA Liping ZHANG Tong Edward TOPP 《土壤圈:英文版》 SCIE CAS CSCD 2019年第3期273-282,共10页
Antibiotic resistance and its environmental component are gaining more attention as part of combating the growing healthcare crisis. The One Health framework, promulgated by many global health agencies, recognizes tha... Antibiotic resistance and its environmental component are gaining more attention as part of combating the growing healthcare crisis. The One Health framework, promulgated by many global health agencies, recognizes that antimicrobial resistance is a truly inter-domain problem in which human health, animal agriculture, and the environment are the core and interrelated components.This prospectus presents the status and issues relevant to the environmental component of antibiotic resistance, namely, the needs for advancing surveillance methodology: the environmental reservoirs and sources of resistance, namely, urban wastewater treatment plants, aquaculture production systems, soil receiving manure and biosolid, and the atmosphere which includes longer range dispersal.Recently, much work has been done describing antibiotic resistance genes in various environments;now quantitative, mechanistic,and hypothesis-driven studies are needed to identify practices that reduce real risks and maintain the effectiveness of our current antibiotics as long as possible. Advanced deployable detection methods for antibiotic resistance in diverse environmental samples are needed in order to provide the surveillance information to identify risks and define barriers that can reduce risks. Also needed are practices that reduce antibiotic use and thereby reduce selection for resistance, as well as practices that limit the dispersal of or destroy antibiotic-resistant bacteria or their resistance genes that are feasible for these varied environmental domains. 展开更多
关键词 animal agriculture antibiotic-resistant bacteria ANTIMICROBIAL resistance AQUACULTURE HUMAN HEALTH One HEALTH framework soil contamination wastewater and SLUDGE
Use of polymeric sub-micron ion-exchange resins for removal of lead,copper,zinc,and nickel from natural waters
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作者 Audrey Murray Banu Ormeci 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第1期247-254,共8页
This research investigated the removal capacity of polymeric sub-micron ion-exchange resins (SMR)for removal of lead,copper,zinc,and nickel from natural waters in competition with natural organic matter (NOM).Polymeri... This research investigated the removal capacity of polymeric sub-micron ion-exchange resins (SMR)for removal of lead,copper,zinc,and nickel from natural waters in competition with natural organic matter (NOM).Polymeric SMR particles were created and tested to ensure that they were adequately dispersed in the solution.They removed little NOM (10% or less)from river water and wastewater,indicating that competition from NOM was not a major concern.SMR were able to remove 82%±0.2% of lead,46%±0.6% of copper,55%±20% of zinc,and 17%±2% of nickel from river water spiked with 500μg/L of each.Similarly, in wastewater,they were able to remove 86%±0.1% of lead,38%±0.8% of copper,28%±1% of zinc,and 11%±1% of nickel. 展开更多
关键词 Water WASTEWATER Heavy metals Ion exchange POLYMERIC SUBMICRON resin Natural organic MATTER (NOM)
吸附法脱除煤化工废水中多环芳烃的工艺研究与应用 预览
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作者 张弘 《山西科技》 2019年第4期43-45,共3页
煤化工废水中存在的多环芳烃对环境具有重大危害,选取树脂作为吸附材料处理煤化工废水中的多环芳烃效果良好。通过试验,确定了树脂的种类及吸附最佳参数,即NDA-150型树脂量为0.017g/mL、吸附时间为10h、pH值为7~8时,对煤化工废水中多环... 煤化工废水中存在的多环芳烃对环境具有重大危害,选取树脂作为吸附材料处理煤化工废水中的多环芳烃效果良好。通过试验,确定了树脂的种类及吸附最佳参数,即NDA-150型树脂量为0.017g/mL、吸附时间为10h、pH值为7~8时,对煤化工废水中多环芳烃的吸附效果最好。 展开更多
关键词 煤化工 废水 多环芳烃 树脂 吸附
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Pilot-scale Study on NCMBR Process for Upgrading of Sewage Treatment Plant in Industrial Park 预览
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作者 Zhengcheng MENG Ping XIAN +3 位作者 Fuping HUANG Zhining HUANG Yulan QIN Jinguo DAI 《亚洲农业研究:英文版》 2019年第5期50-52,57共4页
A pilot-scale research was conducted on nanostructured ceramic membrane bio-reactor( NCMBR) for treatment of comprehensive wastewater from industrial park. The quality of the effluent water was stable and good. During... A pilot-scale research was conducted on nanostructured ceramic membrane bio-reactor( NCMBR) for treatment of comprehensive wastewater from industrial park. The quality of the effluent water was stable and good. During stable operation,the COD,NH3-N and TP concentrations of the influent water were 147-475,42-23. 5 and 0. 65-0. 85 mg/L,respectively,and those of the effluent water were 147-475,0. 08-0. 82 and 0. 18-0. 26 mg/L,respectively,so the average removal rates of COD,NH3-N and TP were 82%,97% and 72%,respectively,meeting the standard for Class-A emissions of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant( GB18918-2002). In addition,the process has certain anti-impact capacity and ability to mitigate membrane fouling,meeting the objectives of upgrading and transformation. This study will provide reference for upgrading of existing sewage treatment plants. 展开更多
关键词 NANOSTRUCTURED Ceramic membrane MBR Industrial PARK WASTEWATER SEWAGE treatment UPGRADING
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陶瓷负载TiO2复合材料的制备及光催化降解废水中苯酚的研究
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作者 胡秀虹 张廷辉 +2 位作者 王翔 蔡凌云 李荡 《化工新型材料》 CAS CSCD 北大核心 2019年第5期190-192,197共4页
以钛酸丁酯为原料,制备出TiO2光催化材料。以苯酚废水为模拟目标降解物,考察了苯酚初始质量浓度、初始pH和不同光照强度等因素对废水中苯酚降解率的影响。结果表明:陶瓷负载TiO2制得的光催化剂在300W汞灯照射下,当苯酚初始质量浓度为50m... 以钛酸丁酯为原料,制备出TiO2光催化材料。以苯酚废水为模拟目标降解物,考察了苯酚初始质量浓度、初始pH和不同光照强度等因素对废水中苯酚降解率的影响。结果表明:陶瓷负载TiO2制得的光催化剂在300W汞灯照射下,当苯酚初始质量浓度为50mg/L,初始pH=7,光照距离为11cm时,对苯酚的降解率较高,pH=7时有利于反应的进行,处理效果较好。反应机理为TiO2受光照射后,产生光生电子-空穴对,使苯酚得到还原。 展开更多
关键词 陶瓷负载 TIO2 光催化 废水
铁铝交流脉冲电凝聚处理含高浓度黄连素制药废水研究 预览
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作者 郭敏晓 《化学工程师》 CAS 2019年第6期43-46,共4页
在传统电化学方法的基础上,提出了铁铝交流脉冲电凝聚法(ACPE)处理制药废水的方法。初步探索了铁铝ACPE处理黄连素制药废水的机理。在实验室条件下进行了可处理性和机理研究。对于黄连素废水(800mg·L^-1),脱色当电压为8V,反应时间... 在传统电化学方法的基础上,提出了铁铝交流脉冲电凝聚法(ACPE)处理制药废水的方法。初步探索了铁铝ACPE处理黄连素制药废水的机理。在实验室条件下进行了可处理性和机理研究。对于黄连素废水(800mg·L^-1),脱色当电压为8V,反应时间为60min,交替周期为10s,电解质浓度为0.015mol·L^-1,搅拌速度为750r·min^-1,pH值为3~10,两板间距为0.6cm时,去除率最高,分别为98%和95%。对黄连素的去除,通过紫外-可见吸收光谱分析、酸化实验、乙二胺四乙酸(EDTA)屏蔽实验、构效关系、氧化和浮选实验,得出絮凝、浮选和氧化的去除效率分别为73%、8%和18%。200和400~1000mg·L^-1黄连素废水的脱色和COD去除分别符合表观拟一级和零级动力学。该方法对提高黄连素废水的处理效率和降低功耗具有指导意义。 展开更多
关键词 铁铝电凝 交流脉冲 黄连素 废水
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限氧废水处理系统的再启动与ANAMMOX功能恢复 预览
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作者 徐翩翩 孟佳 +1 位作者 汪聪 李建政 《哈尔滨工业大学学报》 EI CAS CSCD 北大核心 2019年第2期32-38,共7页
为解决低碳氮比有机废水生物脱氮的难题,经济高效的厌氧氨氧化(ANAMMOX)技术得到广泛研究,但ANAMMOX菌群对环境要求苛刻且富集困难,系统启动缓慢,限制了其工程应用.前期研究中,构建了用于处理高氨氮低碳氮比养猪废水的升流式限氧生物膜... 为解决低碳氮比有机废水生物脱氮的难题,经济高效的厌氧氨氧化(ANAMMOX)技术得到广泛研究,但ANAMMOX菌群对环境要求苛刻且富集困难,系统启动缓慢,限制了其工程应用.前期研究中,构建了用于处理高氨氮低碳氮比养猪废水的升流式限氧生物膜反应器(UOLBR),经180d的启动运行实现了以ANAMMOX为主导的脱氮功能.将UOLBR闲置2个月,以COD与TN比为0.6~1.0的干清粪养猪废水为进水,在水力停留时间10h、25℃和出水回流比25∶1的条件下再次启动,考察其处理效果和ANAMMOX功能的恢复情况.结果表明,经过溶解氧分别为2.5~3.0和0.2~0.5mg/L两个阶段,共计53d的连续运行,UOLBR的处理效能得以恢复并达到稳定状态,对COD、NH+4-N、TN的平均去除率分别为64.0%,96.5%和91.7%,出水质量浓度分别仅为61,7.0和16.4mg/L左右.微生物群落结构和物料平衡分析表明,UOLBR系统恢复了以ANAMMOX为主要脱氮途径的特征.该研究可为低碳氮比有机废水ANAMMOX处理系统的启动和运行管理提供指导. 展开更多
关键词 限氧 废水 低COD与TN比 生物脱氮 生物膜
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染料废水处理技术方法的研究 预览
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作者 薛飞华 朱宝玉 《环境与发展》 2019年第7期91-91,93共2页
为了能够进一步的研发关于废水处理的高效方法,对于我国目前染料的特点进行了介绍,并且总结了我们目前所采用的染料处理方法的特点,为以后的研发工作提供了良好的基础。
关键词 染料 废水 技术方法
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Recyclable adsorbent of BiFeO3/Carbon for purifying industrial dye wastewater via photocatalytic reproducible 预览
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作者 Shuang Jiao Yiming Zhao +2 位作者 Chensha Li Binsong Wang Yang Qu 《绿色能源与环境:英文版》 CSCD 2019年第1期66-74,共9页
It is essential to prepare highly-efficiency reproducible adsorbent for purifying industrial dye wastewater. In this work, biscuit with a layered porous structure as a template is applied to prepare a photocatalytic r... It is essential to prepare highly-efficiency reproducible adsorbent for purifying industrial dye wastewater. In this work, biscuit with a layered porous structure as a template is applied to prepare a photocatalytic recyclable adsorbent of BiFeO3/Carbon nanocomposites for purifying simulative industrial dye wastewater. It is found that the structure of the prepared BiFeO3/Carbon nanocomposite is related to the natural structure of the biscuit, annealing temperatures and immersing times, demonstrated by XRD, TEM, UV-Vis and adsorptive activities. Kinetics data shows that the adsorption rate of the adsorbent to the dye is rapid and fitted well with the pseudo-second-order model, that more than 80% of dyes can be removed in the beginning 30 min. The adsorption isotherm can be perfectly described by the Langmuir model as well. It can be seen from the adsorption data that the adsorption performance can reach over 90% at pH ? 2–12, which can imply its universal utilization. The prepared BiFeO3/Carbon nanocomposites have also displayed excellent capacities(over 90% within 30 min) for adsorption of seven different dyes and their mixed one. According to the five times photocatalytic reproducible experiments, it is proved that BiFeO3/Carbon nanocomposites show the excellent stability and reproduction for purifying simulative industrial dyes, even the sample have been placed for one year. These research results indicate that the adsorbent BiFeO3/Carbon can be a suitable material used in treating industrial dye wastewater potentially. 展开更多
关键词 Reproducible ADSORBENT BiFeO3/Carbon nanocomposites Photocatalysis PURIFYING INDUSTRIAL dye wastewater Pseudo-second-order model
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产蛋白酶耐铬菌株的筛选及应用研究
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作者 吴昱含 郭大鹏 +1 位作者 李帅鹏 李玉 《中国皮革》 CAS 2019年第6期59-63,67共6页
从废铬革屑长期堆积地的土壤中筛选耐Cr^3+产蛋白酶菌株,采用16SrDNA基因序列相似性分析鉴定菌株,并对菌株发酵产酶和耐铬特性进行分析。结果表明:菌株鉴定为蜡样芽孢杆菌,命名为B.cereus TCCC12102。菌株经37℃,200r/min发酵48h后碱性... 从废铬革屑长期堆积地的土壤中筛选耐Cr^3+产蛋白酶菌株,采用16SrDNA基因序列相似性分析鉴定菌株,并对菌株发酵产酶和耐铬特性进行分析。结果表明:菌株鉴定为蜡样芽孢杆菌,命名为B.cereus TCCC12102。菌株经37℃,200r/min发酵48h后碱性蛋白酶活性达到460.6U/mL。菌株可耐受Cr^3+的最大浓度为1.4g/L,碱性蛋白酶可耐受Cr^3+的最大浓度为2.0g/L.采集含铬污水进行实际作用效果分析,经48h处理,污水蛋白含量下降显著,清除率高达91.9%。本菌株具有高效处理含铬污水蛋白的作用,应进一步加强实际应用研究。本研究为制革行业含铬污水处理和蛋白资源合理利用提供了依据。 展开更多
关键词 蜡样芽孢杆菌 蛋白酶 污水 皮革 应用
低C/N摩尔比好氧反硝化菌的筛选及脱氮特性
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作者 胡杰 颜家保 +4 位作者 霍晓琼 吴玲 俞丹青 陈美玲 李超 《现代化工》 CAS CSCD 北大核心 2019年第5期128-132,共5页
从石化废水处理厂活性污泥中分离得到1株低C/N摩尔比的好氧反硝化菌株AD-7,通过形态学观察、生理生化试验及16S rD NA测序,确定其为假单胞菌属(Pseudomonas sp.)。通过单因素实验确定菌株适宜的好氧反硝化培养条件为:丁二酸钠为碳源、... 从石化废水处理厂活性污泥中分离得到1株低C/N摩尔比的好氧反硝化菌株AD-7,通过形态学观察、生理生化试验及16S rD NA测序,确定其为假单胞菌属(Pseudomonas sp.)。通过单因素实验确定菌株适宜的好氧反硝化培养条件为:丁二酸钠为碳源、培养温度为30~35℃、初始pH 6. 0~7. 0、摇床转速为150~200 r/min。在适宜的好氧反硝化培养条件下,研究了菌株生长情况与反硝化脱氮特性。结果表明,菌株生长与反硝化脱氮基本同步,并且在菌株培养12 h时,硝酸盐氮和总氮的去除率分别高达90. 47%和86. 06%,未出现亚硝酸盐氮的明显积累。因此,菌株AD-7能够通过完全反硝化实现总氮的有效脱除,在低C/N摩尔比废水脱氮方面具有潜在应用价值。 展开更多
关键词 废水 好氧反硝化 低C/N摩尔比 脱氮 假单胞菌
Photocatalysts for degradation of dyes in industrial effluents:Opportunities and challenges
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作者 Hassan Anwer Asad Mahmood +3 位作者 Jechan Lee Ki-Hyun Kim Jae-Woo Park Alex C.K.Yip 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第5期955-972,共18页
Discharging dye contaminants into water is a major concern around the world.Among a variety of methods to treat dye-contaminated water,photocatalytic degradation has gained attention as a tool for treating the colored... Discharging dye contaminants into water is a major concern around the world.Among a variety of methods to treat dye-contaminated water,photocatalytic degradation has gained attention as a tool for treating the colored water.Herein,we review the recent advancements in photocatalysis for dye degradation in industrial effluents by categorizing photocatalyst materials into three generations.First generation photocatalysts are composed of single-component materials (e.g.,TiO2,ZnO,and CdS),while second generation photocatalysts are composed of multiple components in a suspension (e.g.,WO3/NiWO4,BiOl/ZnTiOa,and C3N4/Ag3VO4).Photocatalysts immobilized on solid substrates are regarded as third generation materials (e.g.,FTO/WO3-ZnO,Steel/TiO2-WO3,and Glass/P-TiO2).Photocatalytic degradation mechanisms,factors affecting the dye degradation,and the lesser-debated uncertainties related to the photocatalysis are also discussed to offer better insights into environmental applications.Furthermore,quantum yields of different photocatalysts are calculated,and a performance evaluation method is proposed to compare photocatalyst systems for dye degradation.Finally,we discuss the present limitations of photocatalytic dye degradation for field applications and the future of the technology. 展开更多
关键词 PHOTOCATALYST DYE WASTEWATER DEGRADATION mechanism performance evaluation
Continuous flow removal of acid fuchsine by dielectric barrier discharge plasma water bed enhanced by activated carbon adsorption
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作者 Rusen Zhou Renwu Zhou +2 位作者 Xianhui Zhang Kateryna Bazaka Kostya (Ken) Ostrikov 《化学科学与工程前沿:英文版》 EI CAS CSCD 2019年第2期340-349,共10页
Continuous processes which allow for large amount of wastewater to be treated to meet drainage standards while reducing treatment time and energy consumption are urgently needed. In this study, a dielectric barrier di... Continuous processes which allow for large amount of wastewater to be treated to meet drainage standards while reducing treatment time and energy consumption are urgently needed. In this study, a dielectric barrier discharge plasma water bed system was designed and then coupled with granular activated carbon (GAC) adsorption to rapidly remove acid fuchsine (AF) with high efficiency. Effects of feeding gases, treatment time and initial concentration of AF on removal efficiency were investigated. Results showed that compared to the N2 and air plasmas treatments, O2 plasma processing was most effective for AF degradation due to the strong oxidation ability of generated activated species, especially the OH radicals. The addition of GAC significantly enhanced the removal efficiency of AF in aqueous solution and shorten the required time by 50%. The effect was attributed to the ability of porous carbon to trap and concentrate the dye, increasing the time dye molecules were exposed to the plasma discharge zone, and to enhance the production of OH radicals on/in GAC to boost the degradation of dyes by plasma as well as in situ regenerate the exhausted GAC. The study offers a new opportunity for continuous effective remediation of wastewater contaminated with organic dyes using plasma technologies. 展开更多
关键词 continuous REMOVAL dye-containing WASTEWATER dielectric barrier discharge plasma WATER BED activated carbon adsorption
Advances in Control Technologies for Wastewater Treatment Processes:Status, Challenges, and Perspectives 预览
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作者 Abdelhamid Iratni Ni-Bin Chang 《自动化学报:英文版》 CSCD 2019年第2期337-363,共27页
This paper presents a thorough review of control technologies that have been applied to wastewater treatment processes in the environmental engineering regime in the past four decades. It aims to provide a comprehensi... This paper presents a thorough review of control technologies that have been applied to wastewater treatment processes in the environmental engineering regime in the past four decades. It aims to provide a comprehensive technological review for both water engineering professionals and control specialists, giving rise to a suite of up-to-date pathways to impact this field in light of the classified technology hubs. The assessment was conducted with respect to linear control, linearizing control,nonlinear control, and artificial intelligence-based control. The application domain of each technology hub was summarized into a set of comparative tables for a holistic assessment. Challenges and perspectives were offered to these field engineers to help orient their future endeavor. 展开更多
关键词 Control TECHNOLOGIES system engineering WASTEWATER treatment
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Application of activated carbon-decorated polyacrylonitrile nanofibers as an adsorbent in dispersive solid-phase extraction of fluoroquinolones from wastewater 预览
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作者 K. Mogolodi Dimpe Philiswa N. Nomngongo 《药物分析学报:英文版》 CAS CSCD 2019年第2期117-126,共10页
A cheap and simple sample preparation method,consisting of a dispersive solid-phase method and an adsorbent,activated carbon decorated PAN nanofibers,was employed and used for the extraction of antibiotics (ciprofloxa... A cheap and simple sample preparation method,consisting of a dispersive solid-phase method and an adsorbent,activated carbon decorated PAN nanofibers,was employed and used for the extraction of antibiotics (ciprofloxacin,danofloxacin,and enrofloxacin) in wastewater.Electrospun PAN nanofibers that were decorated with activated carbon produced from waste tires were used as the solid phase and the antibiotics analyzed by using high-performance liquid chromatography.Parameters such as pH,mass of adsorbent (MA),extraction volume (EV),and extraction time (ET) were optimized owing to their potential effect on the extraction of antibiotics from water.The recovery of all antibiotics was satisfactory,in the range of 90%–99%.The limits of detection and quantification were 0.05,0.11,0.20,and 0.53,1.21,2.17 mg/L,respectively.The precision was determined from the repeatability and reproducibility and expressed as the intra-day (n=20) and inter-day (n=5) precision.The intra-day and inter-day precision was reported in terms of the percentage relative standard deviation,which was 3% and 4%,respectively.The adsorption capacity of the activated carbon-decorated PAN nanofibers was satisfactory,and the reusability of the adsorbent was impressive when reused ten times.The accuracy of the dispersive solid phase extraction (DSPE) was validated by spike recovery tests;the results proved the reliability and efficiency of adsorbing antibiotics from wastewater.Finally,the proposed method was applied to wastewater samples collected from a wastewater treatment plant,which included influent,secondary,and effluent wastewater. 展开更多
关键词 WASTEWATER NANOFIBERS Activated carbon ANTIBIOTICS POLYACRYLONITRILE
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