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Journal of Environmental Sciences 2024年第5期139卷 556-568页

作者： Xi Wang Asif Hussain Qingqing li Mingyu Ma Juan Wu Mingqiang Deng Jie Yang dengxin li Department of Environmental Science and Engineering Donghua UniversityShanghai 201620China Department of Environmental Science Federal Urdu University of ArtsScience and Technology75300 KarachiPakistan Shanghai Academy of Environmental Sciences Shanghai 200233China

The coupling of washing with adsorption process can be adopted for the treatment of soils contaminated with heavy metals ***,the complex environment of soil and the competitive behavior of leaching chemicals considerably restrain adsorption capacity of adsorbent material during washing process,which demands a higher resistance of the adsorbents to *** this study,we synthesized strongly magnetic,high specific surface area(573.49 m^(2)/g)UiO66 composites(i.e.,UiO66-Fe_(3)O_(4))using hydrothermal *** UiO66-Fe_(3)O_(4) was applied as an adsorbent during the ethylene diamine tetraacetic acid(EDTA)-assisted washing process of contaminated *** incorporation of UiO66-Fe_(3)O_(4)results in rapid heavy metal removal and recovery from the soil under low concentrations of washing agent(0.001 mol/L)with reduced residual heavy metal mobility of soil after ***,UiO66-Fe_(3)O_(4)can quickly recollect by an external magnet,which offers a simple and inexpensive recovery method for heavy metals from contaminated ***,UiO66-Fe_(3)O_(4)configuration with EDTA-assisted washing process showed opportunities for heavy metals contaminated sites.

关键词： UiO66 composites Metal-EDTA complexes EDTA-assisted washing Heavy metals recovery Soil

危废综合焚烧回转窑经济高效运行的技术难点及对策

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有色金属（冶炼部分） 2024年第3期 134-139页

作者：陈钦尚辉良李登新蒋太波东华大学环境科学与工程学院上海201620 上海第二工业大学资源与环境工程学院上海201209 北京中再联盟技术服务有限公司北京102425 成都环服科技有限责任公司成都610000

随着国内危险废物处理产业化快速发展,回转窑综合焚烧技术得到了广泛应用,但其工业化应用存在回转窑工况不稳定、焚烧性能差、灰渣率高等问题,严重影响焚烧效率和运行成本。以危废综合焚烧的灰渣率为切入点,从回转窑焚烧机理、工艺设计... 详细信息

随着国内危险废物处理产业化快速发展,回转窑综合焚烧技术得到了广泛应用,但其工业化应用存在回转窑工况不稳定、焚烧性能差、灰渣率高等问题,严重影响焚烧效率和运行成本。以危废综合焚烧的灰渣率为切入点,从回转窑焚烧机理、工艺设计、工艺控制、工艺运行等方面分析了灰渣率高的原因,并提出了相应的解决对策和建议,为危废综合焚烧回转窑经济高效运行和产业高质量发展提供参考和借鉴。

关键词：危险废物综合焚烧顺流式回转窑逆流式回转窑稳定工况灰渣率技术难点对策

分散固相萃取-气相色谱法测定水中8种苯系物

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化学分析计量 2024年第6期33卷 55-60页

作者：张文舒王曦李登新东华大学环境科学与工程学院上海201600 上海康营检测技术有限公司上海201114

建立了分散固相萃取/气相色谱法快速测定水中8种苯系物。称取0.2 g UiO-66-NH_(2)萃取剂,加入到70 mL水样中,涡旋提取2 min,在8000 r/min下离心5 min,倾出水样,加入1.0 mL二硫化碳(CS2)涡旋提取2.5 min,用微量进样针吸取液体装入色谱小... 详细信息

建立了分散固相萃取/气相色谱法快速测定水中8种苯系物。称取0.2 g UiO-66-NH_(2)萃取剂,加入到70 mL水样中,涡旋提取2 min,在8000 r/min下离心5 min,倾出水样,加入1.0 mL二硫化碳(CS2)涡旋提取2.5 min,用微量进样针吸取液体装入色谱小瓶中,进样至气相色谱-火焰离子化检测器(GC-FID)进行测定。8种苯系物在质量浓度为0.5~20.0 mg/L范围内与对应的峰面积呈良好的线性关系,相关系数均为0.9997以上。方法检出限为0.01~0.02mg/L,定量限为0.04~0.08 mg/L。对地表水进行加标分析,加标回收率为82.4%~108%,相对标准偏差为5.3%~8.8%(n=6)。此外,UiO-66-NH_(2)萃取剂重复使用5次后,8种苯系物回收率仍然在80%以上。该方法操作简单、快速、准确,可应用于水中8种苯系物的测定。

关键词：苯系物气相色谱分散固相萃取 UiO-66-NH_(2) 环境水体

Pretreatment of cyanided tailings by catalytic ozonation with Mn^(2+)/O^3

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Journal of Environmental Sciences 2015年第2期27卷 14-21页

作者： Yulong li dengxin li Jiebing li Jin wang Asif Hussain Hao Ji Yijie Zhai College of Environmental Science and Engineering State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry Donghua University

The increasing amount of cyanided tailings produced as a by-product has gained significant attention in recent years because of the rapid development of the gold industry and extensive exploitation of gold mineral resources. The effective use of these secondary resources is becoming an important and urgent problem for all environmental protection staff. Manganese-catalyzed ozonation for the pre-oxidation of cyanided tailings was studied and the effects of Mn2＋dosage, initial sulfuric acid concentration, ozone volume flow, temperature and agitation speed on pretreatment were examined. The optimum reaction conditions were observed to be： ore pulp density 2.5%, agitation speed 700 r/min,temperature 60°C, Mn2＋dosage 40 g/L, ozone volume flow 80 L/hr, initial sulfuric acid concentration 1 mol/L, and reaction time 6 hr. Under these conditions, the leaching rate of Fe and weight loss could reach 94.85% and 48.89% respectively. The leaching process of cyanided tailings by Mn2＋/O3 was analyzed, and it was found that the leaching of pyrite depends on synergetic oxidation by high-valent manganese and O3, in which the former played an important part.

关键词： Cyanided tailings Pretreatment Mn2+/O3 Catalytic ozonation

微纳米气泡气液分散体系耦合陶瓷膜间接法氧化吸收甲苯

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应用化工 2024年第7期53卷 1523-1526页

作者：陈钦罗睿涵朱欣杰陆丹慧肖政国李登新东华大学环境科学与工程学院上海201620 上海第二工业大学资源与环境工程学院上海201209 北京师范大学附属中学北京100050 上海市纺织科学研究院有限公司上海200082

利用微纳米气泡气液分散体系耦合陶瓷膜间接氧化吸收甲苯,考察了吸收液初始pH、甲苯浓度、流量对甲苯的氧化吸收效率的影响,并对其反应机理进行了研究。结果表明,中性条件下的吸收液对甲苯的吸收能获得最佳效果,甲苯浓度及气体流量的提... 详细信息

利用微纳米气泡气液分散体系耦合陶瓷膜间接氧化吸收甲苯,考察了吸收液初始pH、甲苯浓度、流量对甲苯的氧化吸收效率的影响,并对其反应机理进行了研究。结果表明,中性条件下的吸收液对甲苯的吸收能获得最佳效果,甲苯浓度及气体流量的提高均会导致吸收效率下降,最佳条件为:pH为7.00,甲苯浓度为256.06 mg/cm^(3)及气体流量为150 mL/min,此时甲苯吸收效率能达到95.98%。此外,降解产物及机理分析表明,主要是微纳米气泡释放的·OH对甲苯进行氧化和降解,形成CO_(2)和水,并在液相中予以吸收。

关键词：微纳米气泡陶瓷膜氧化吸收甲苯

One-step floating conversion of biomass into highly graphitized and continuous carbon nanotube yarns

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Green Energy & Environment 2023年第6期8卷 1711-1718页

作者： Gongxun Zhai Qianqian Wang Fuyao liu Zexu Hu Chao Jia dengxin li Hengxue Xiang Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China

The rapid growth of the demand for carbon nanotubes(CNTs) has greatly promoted their large-scale synthesis and development. However,the continuous production of CNT fibers by floating catalyst chemical vapor deposition(FCCVD) requires a large amount of non-renewable carbon sources. Here, the continuous production of highly graphitized CNT yarns from biomass tannic acid(TA) is reported. The chelation of TA and catalyst promotes the rapid cracking of biomass into carbon source gas, and the pyrolysis cracking produces the reducing gas, which solves the problems of the continuous production of CNT yarns using biomass. Through simple twisting, the mechanical strength of CNT yarn can reach 886 ± 46 MPa, and the electrical conductivity and graphitization(IG/ID) can reach 2 × 10^(5)S m^(-1)and 6.3, respectively. This work presents a promising solution for the continuous preparation of CNT yarns based on green raw material.

关键词： Carbon nanotube Tannic acid Biomass Pyrolysis Floating catalyst chemical vapor deposition

Exploring the Performance of Magnetic Immobilized Lysozyme on Sludge Hydrolysis and Mechanism of Improving Dewaterability of Excess Sludge

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Journal of Donghua University(English Edition) 2019年第4期36卷 344-356页

作者： Sludge XUE Fei CHEN Qin li Yulong liU Eryan li dengxin College of Environmental Science and Engineering Donghua UniversityShanghai 200051China State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry Donghua UniversityShanghai 201620China

The performance of the immobilized lysozyme and the native lysozyme on enhancing the excess sludge dewaterability was *** results indicated that the specific resistance to filtration(SRF)decreased by 62.8%for native lysozyme and 53.6%for immobilized lysozyme at the enzyme dosage of 9 mg/g(dry sludge).Correlation analysis was carried out to explore the role of different extracellular polymeric substance(EPS)fractions on excess sludge *** results illustrated that the SRF negatively correlated with protein,polysaccharide from soluble EPS(S-EPS)and loosely bound EPS(LB-EPS)and positively correlated with that from tightly bound EPS(TB-EPS).Three-dimensional excitation emission matrix(3D-EEM)fluorescence analysis combined with the scanning electron microscope(SEM)images,revealed that sludge floc structure and microbial cells were destroyed by enzymatic treatment,and that the enzymatic hydrolysis could help to improve the transformation of hydrophilic groups from TB-EPS and the performance of the excess sludge dewatering *** assessment of hydrolysis using the immobilized enzyme provided a new insight for the safe disposal of the sludge.

关键词： excess sludge immobilized lysozyme dewatering magnetic nanoparticles

Self-developed Pneumatic Spraying Scrubber for Recovering NO_x from Metallurgical Exhaust

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Journal of Donghua University(English Edition) 2019年第6期36卷 521-526页

作者： SUN Hongrui DUAN Guangjie ASIF Hussain XUE Fei WANG Jun li dengxin SONG Pengcheng College of Environmental Science and Engineering Donghua UniversityShanghai 201620China Shanghai Society for Environmental Science Shanghai 200001China

NOx is generally composed of NO,NO2,N2O,N2O4,and N2O5,which may form photochemical smoke and may lead to acid rain,greenhouse effect and destruction of the ozone layer in the *** this paper,a new pneumatic spraying scrubber was developed for recovering NOx from metallurgical *** this device,NOx was converted into nitric acid,which was then recycled in the oxidization *** with conventional pneumatic spraying scrubbers,the self-developed pneumatic spraying scrubber had significant advantages,such as the simple structure without liquid circulation pump,easy operation,energy conservation,and the high recovery *** influences of various parameters,such as the spray tube height,the spray nozzle diameter,the concentration and temperature of the absorbent,and the operating pressure,on the recovery of NOx were also *** best NOx removal efficiency was 76.08%.When the spray tube height was 0.74 m,the nozzle diameter was 0.5 mm,the absorbent content was 5%at 30℃,and the operating pressure was 0.15-0.17 *** invented pneumatic spraying scrubber successfully solves the problems of high-concentration NOx absorption and regeneration of nitric *** addition,the device can also absorb other harmful gases and provide a possible new treatment process for air pollution control.

关键词： absorption NO x pneumatic spray scrubber flue gases equipment

基于乙酸根离子的有机化肥作为正渗透膜反应器的汲取液缓解反应器中的盐积累

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环境工程学报 2019年第12期13卷 2853-2862页

作者：王瑾李登新东华大学环境科学与工程学院国家环境保护纺织工业污染防治工程技术中心上海201620 悉尼科技大学市政与环境工程学院悉尼NSW2007

为解决正渗透膜反应器中盐积累的问题,选取乙酸铵(NH4C2H3O2)、乙酸钠(NaC2H3O2)和乙酸钾(KC2H3O2)3种基于乙酸根离子的有机化肥作为正渗透膜反应器的汲取液,并将其与硫酸铵((NH4)2SO4)、氯化钠(NaCl)和氯化钾(KCl)3种其对应无机离子汲... 详细信息

为解决正渗透膜反应器中盐积累的问题,选取乙酸铵(NH4C2H3O2)、乙酸钠(NaC2H3O2)和乙酸钾(KC2H3O2)3种基于乙酸根离子的有机化肥作为正渗透膜反应器的汲取液,并将其与硫酸铵((NH4)2SO4)、氯化钠(NaCl)和氯化钾(KCl)3种其对应无机离子汲取液的正渗透(FO)工艺性能和正渗透膜生物反应器(OMBR)工艺性能进行比较。通过工艺水通量和盐含量的测定,生物反应器内COD、铵态氮和硝态氮含量的测定,污染后膜表面的SEM分析,评价了基于乙酸根离子的有机化肥作为正渗透膜反应器的汲取液对反应器内盐积累和膜污染的影响。结果表明:在FO工艺中,乙酸铵、乙酸钠和乙酸钾在0.6 mol·L^-1浓度下的平均水通量分别为10.30、11.07和12.73 L·(m^2·h)^-1,低于其对应的无机离子汲取液的水通量;在OMBR工艺中,乙酸铵、乙酸钠和乙酸钾有机化肥作为汲取液可以显著减缓反应器内盐度的积累。此外,当基于乙酸根离子的有机化肥作为正渗透膜反应器的汲取液时,生物反应器中微生物的生物活性更高,虽然这更容易造成膜污染,但可以有效地去除有机物和氮磷营养物质。研究可为正渗透生物反应器的实际应用提供参考。

关键词：正渗透膜好氧生物反应器乙酸根有机肥有机离子汲取液盐累积

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碳氮比对垃圾干化及能源化利用的影响

环境工程学报 2017年第6期11卷 3773-3779页

作者：李玉龙蔡文倍李登新东华大学环境科学与工程学院上海201620 国家环境保护纺织污染防治工程技术中心上海201620

采用自制的生物干化实验装置,以高含水率混合收集生活垃圾为研究对象,探讨了不同C/N比(15、20.7、24.6和30)对垃圾生物干化效果的影响,比较了4组干化产物的RDF产率和产品性质。结果表明,不同C/N比垃圾生物干化理化性质与脱水效果存在明... 详细信息

采用自制的生物干化实验装置,以高含水率混合收集生活垃圾为研究对象,探讨了不同C/N比(15、20.7、24.6和30)对垃圾生物干化效果的影响,比较了4组干化产物的RDF产率和产品性质。结果表明,不同C/N比垃圾生物干化理化性质与脱水效果存在明显差异;低C/N比处理的pH、NH_3挥发率均大于高C/N处理。C/N比为20.7垃圾生物干化效果最佳,在这种比例下处理的含水率下降幅度、垃圾水分去除率、单位有机物脱水能力和低位热值增幅均大于其他处理组。经过12 d生物干化,不同C/N比垃圾含水率分别下降了16.5%、20.3%、13%和15.4%,干化产物低位热值同比原生垃圾增长了78.3%、114.5%、65.8%和79.0%,达到了垃圾经济性焚烧要求,其硫、氯元素含量低于0.5%,重金属的含量也在可以合理范围内,可作为RDF燃料制备原料。

关键词： C/N 生物干化能源化利用低位热值 RDF