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Discussion on Preparation and Application of BiOIO_(3)-based Composite Materials

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Agricultural Biotechnology 2020年第6期9卷 104-107,135页

作者： Chengdong XU yushan wan School of Environmental&Safety Engineering Changzhou UniversityChangzhou 213164China

BiOIO3 is a layered semiconductor photocatalyst,which has good chemical properties and has attracted wide attention from researchers because of its unique ***,pure BiOIO3 has defects such as insufficient response to visible light and easy recombination of photogenerated ***,in recent years,scholars have tried to modify BiOIO3 to expand its light absorption range,reduce the recombination of photogenerated electron-hole pairs and reduce its limitations,thereby improving its visible light catalytic *** researches focus on the improvement of the catalytic activity of photocatalytic materials from morphology control,precious metal deposition,ion doping and construction of heterojunctions.

关键词： BiOIO3 Photocatalysis Composite material Degradation

Electrokinetics-magnetic/alkali Composite-modified Biochar for Remediation of Cd-contaminated soil

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Agricultural Biotechnology 2020年第5期9卷 49-53,72页

作者： Juan ZHAI Anwei wanG Juan LI Chengdong XU yushan wan College of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China

[Objectives]This study was conducted to explore the removal performance and mechanism of heavy metal Cd in soil by combining electrokinetic technology and modified biochar.[Methods]The electrokinetics-magnetic/alkali composite-modified biochar method was applied to remediate Cd-contaminated soil.[Results]When remediating the soil for 120 h under electric field strength of 2 V/cm with 0.1 mol/L citric acid as the electrolyte,the current periodically varied with the remediation ***^2+in the soil dissociated and migrated from the soil surface,and the addition of the magnetic/alkali composite-modified biochar in the cathode area affected the hydrolysis balance of heavy metal Cd^2+ions and maintained soil pH in a low *** exchangeable Cd content at the test sampling points near the cathode area was relatively high,and the organic Cd area was evenly *** average removal rate of Cd in the soil was up to 90.31%.The hexagonal anode device configuration enhanced the electromigration performance and made the soil pH and conductivity change within a certain range,which was beneficial to the migration of Cd2+and improved the removal rate of soil heavy metal Cd.[Conclusions]This study provides a theoretical basis for the treatment of soil heavy metal pollution and the resource utilization of composite-modified biochar.

关键词： Cd Soil pollution Electrokinetics Biochar

Study on CeO_2/CuFe_2O_4 Catalytic Ozonation of Resorcinol

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Agricultural Biotechnology 2019年第2期8卷 220-225页

作者： Min SHAO Anwei wanG Hui HAN Meng SHEN yushan wan School of Environmental & Safety Engineering Changzhou University

In order to improve the catalytic ozonation effect of resorcinol, the spinel CuFe_2O_4 was modified by doped CeO_2, and X-ray diffraction(XRD) and scanning electron microscopy(SEM) were used for characterization analysis. The effects of composite catalyst CeO_2/CuFe_2O_4 dosage, ozone dosage, initial pH and reaction temperature on degradation were studied, and the stability of the catalyst was tested. The results showed that the composite effect of CeO_2/CuFe_2O_4 prepared by combustion method was good, and the catalyst presented a laminated structure, in which 30 wt% CeO_2/CuFe_2O_4 degradation effect was significant. The removal rate of resorcinol using CeO_2/CuFe_2O_4 composite catalyst was higher than that using ozone or CuFe_2O_4 separately by 41.8% and 11.9%, respectively. In a reaction with resorcinol concentration of 100 mg/L, the catalyst dosage of 1.0 g/L, the ozone dosage of 2.5 mg/(L·min), at pH=9, temperature of 20 ℃, for reaction time of 40 min, the resorcinol removal rate was 88.5%. The catalyst CeO_2/CuFe_2O_4 still showed good degradation effect after repeatedly using for 10 times, and the dissolution rate of metal ions was lower than that of CuFe_2O_4.

关键词： Catalytic ozonation CeO2/CuFe2O4 Resorcinol Stability

Experimental Study on In-situ Leaching and Electrokinetic Remediation of Composite Heavy Metal-contaminated Soil

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Agricultural Biotechnology 2020年第2期9卷 73-78页

作者： Hui HAN Juan ZHAI Anwei wanG Juan LI Chengdong XU yushan wan Environment and Safety Engineering College Changzhou UniversityChangzhou 213164China

[Objectives] This study was conducted to investigate in-situ leaching and electrokinetic combined remediation of composite heavy metal-contaminated soil.[Methods] Leaching and electrokientic combined remediation was applied to remediate artificially-simulated composite Cd,Cu,Pb,and Zn-contaminated *** electrokinentic remediation of the soil was carried out using EDTA and acetic acid as the eluents with electrodes placed on the top and bottom of the soil,to investigate the effects of different types and concentrations of eluents,reaction time and energization methods on the remediation.[Results]Applying electrodynamic force to the leaching remediation process achieved good removal effects of Cd,Cu,Pb,and Zn in the *** with pure leaching,the leaching and electrokinetic combined remediation saved 23.8% of EDTA *** showed the ability to complex heavy metals better than acetic acid,and after 10 d of reaction,the 0.1 mol/L EDTA achieved very good removal effects on Cd,Cu,Pb,and Zn from the upper and middle layers of the soil column,exhibiting removal rates of 94.4%,93.3%,91.4% and 92.8% in the upper layer and 87.2%,88.2%,83.3% and 84.6%,*** with the conventional experiments,the intermittent energization method and the voltage-increasing method improved the removal rates of Cd,Cu,Pb and Zn by 6.3%,6.1%,5.9%and 6%,and 0.6%,0.9%,0.5% and 0.4%,respectively,and saved 46.8% and 10.3% of energy consumption,respectively.[Conclusions]The study provides reference for the remediation of composite heavy metal-contaminated soil.

关键词： EDTA Acetic acid Heavy metals Removal rate Energy consumption

Study on Electrokinetic Remediation of Cadmium-contaminated Soil

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Agricultural Biotechnology 2019年第1期8卷 135-139页

作者： Meng SHEN Yanqiu CHEN Hui HAN Xin WEN Min SHAO Mingxin wanG yushan wan College of Environment and Safety Engineering Changzhou University

In order to improve electrokinetic remediation efficiency of cadmium-contaminated soil,the effects of electric field intensity,remediation time and electrolyte on removal rate of total Cd in Cd-contaminated soil by electrokinetic remediation were studied through the preparation of Cd-contaminated soil and the construction of electrokinetic remediation equipment. The results showed that under the same condition,with the electric field intensity increasing from 2. 5 to 3 V/cm,the total Cd removal rate increased by 10. 62%,and with the increase of the electric field intensity from 3 to 3. 5 V/cm,the removal rate increased by 1. 87%;when the remediation time was prolonged from 72 to 96 h,the removal rate of total Cd increased by 6. 68%,and with the remediation time prolonged from 96 to120 h,the removal rate of total Cd increased by 8. 75%; and with the remediation time prolonged from 120 to 144 h,the removal rate of total Cd only increased by1. 07%. Compared with citric acid as the electrolyte,the acetic acid group improved the remediation efficiency by 12. 14% and the total energy consumption by62. 13%,while the hydrochloric acid group improved the remediation efficiency by 18. 04% and the total energy consumption by 187. 9%. Comprehensively from total Cd removal rate and energy consumption,the remediation effect was the best under the electric field intensity of 3 V/cm and the electrokinetic time of 120 h with acetic acid as the electrolyte,which achieved a total Cd removal rate of 41. 95%.

关键词： Electrokinetic remediation Cadmium contamination Electrolyte Bentonite

Design of Semi Physical Motion Simulation System of Underwater Robot

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Design of Semi Physical Motion Simulation System of Underwat...

第25届中国控制会议

作者： Gan Yong, Sun yushan, Mao Yufeng, wan Lei Depart. Of Naval Architecture and Oceanic Eng, Harbin Engineering University, Harbin 150001

＜正＞Semi physical motion simulation system of underwater robot is established by combining physical simulation of control layer with virtual simulation of sensory and executive layer. Not only the software logic but also the hardware architecture, information interface and reliability can be verified with the semi physical motion simulation system. The hardware and software architecture of the simulation system are explained in detail. The virtual simulation of hydrodynamics, motion sensors and physical simulation of control layer are described. Finally, the long distance motion simulation and obstacle avoidance simulation experiments are conducted to demonstrate the importance of the system for the success of sea experiments.

关键词： underwater robot semi physical motion simulation hardware architecture software architecture motion control

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鼓风曝气充氧性能与曝气器水深关系

环境工程 2007年第1期25卷 19-21页

作者：冯俊生万玉山江苏工业学院环境与安全工程系常州213016

应用相似原理,建立曝气器清水充氧性能与曝气器浸没深度变化的数学模式,为曝气器充氧性能科学预测和曝气工艺设计提供可靠的参数。

关键词：相似原理曝气性能数学模型参数

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植物对Cd-B[α]P复合污染土壤的修复

环境工程学报 2017年第6期11卷 3866-3872页

作者：万玉山陈艳秋吕浩李大伟邹涛常州大学环境与安全工程学院常州213164

为了研究植物对Cd-B[α]P复合污染土壤的修复效果,本研究采取实验室模拟实验的方法,通过种植黑麦草、芥菜、苜蓿和高羊茅,进行Cd、B[α]P污染土壤修复植物的筛选。结果表明,芥菜和黑麦草对土壤中有效态Cd均有富集能力。黑麦草对B[α]P... 详细信息

为了研究植物对Cd-B[α]P复合污染土壤的修复效果,本研究采取实验室模拟实验的方法,通过种植黑麦草、芥菜、苜蓿和高羊茅,进行Cd、B[α]P污染土壤修复植物的筛选。结果表明,芥菜和黑麦草对土壤中有效态Cd均有富集能力。黑麦草对B[α]P污染土壤修复效果比苜蓿、高羊茅的修复效果强,75 d时,平均富集系数最高为1.1。在Cd-B[α]P复合污染土壤植物修复效果的研究中,选择在土壤中种植黑麦草,结果表明,黑麦草对Cd-B[α]P复合污染土壤中Cd和B[α]P有良好地去除作用,75 d时,分别达到58.55%和89.95%。

关键词：污染土壤筛选富集 Cd-B[α]P 植物修复

改性活性炭纤维的制备及对重金属吸附性能的研究

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工业水处理 2023年第5期43卷 114-121页

作者：成悦季伟伟邵敏万玉山常州大学环境与安全工程学院江苏常州213164

通过氢氧化钠-高温煅烧法对活性炭纤维(ACF)进行复合改性,制备出改性活性炭纤维ACF-Na-HT,利用扫描电镜(SEM)、红外光谱(FTIR)、X射线衍射(XRD)等分析手段对改性前后的ACF进行表征。采用ACF-Na-HT对含镉废水进行吸附处理,利用批量实验... 详细信息

通过氢氧化钠-高温煅烧法对活性炭纤维(ACF)进行复合改性,制备出改性活性炭纤维ACF-Na-HT,利用扫描电镜(SEM)、红外光谱(FTIR)、X射线衍射(XRD)等分析手段对改性前后的ACF进行表征。采用ACF-Na-HT对含镉废水进行吸附处理,利用批量实验对不同的影响因素进行探究,并对吸附过程进行热力学及动力学研究。结果表明,ACF-Na-HT对含镉废水的Cd^(2+)去除率可达到98%,Cd^(2+)吸附量为17.7 mg/g,且吸附过程符合Lang?muir等温吸附模型和准二级吸附动力学模型。

关键词：活性炭纤维改性吸附镉