作者： 张纯;蒋海燕;邓玉梅;李好

期刊： 高教学刊,2020年(27):169-172 ISSN：2096-000X

作者机构： 湖南城市学院 市政与测绘工程学院,湖南 益阳 413000;[张纯; 李好; 邓玉梅; 蒋海燕] 湖南城市学院

关键词： 给水排水;复杂工程问题;工程伦理;能力培养

摘要： 文章根据对复杂工程问题的界定,分析了复杂工程问题和复杂技术问题的差别;给出了给排水科学与工程专业复杂工程问题参数确定方法,阐述了复杂工程问题解决过程中的误区,介绍了工程伦理素质的培养方法,明确了给排水科学与工程专业学生解决复杂工程问题时需要的基本素养。

语种： 中文

作者： 张纯;邓玉梅;李好

期刊： 四川水泥,2020年(4):292-292 ISSN：1007-6344

作者机构： 湖南城市学院 市政与测绘工程学院, 湖南 益阳 413000;[张纯; 李好; 邓玉梅] 湖南城市学院

关键词： OBE理念;工程认证;教学改革

摘要： 《水质工程学》是给排水科学与工程专业的核心专业课程之一,具有较强的理论性和工程属性。目前,传统的教学模式难以达到专业认证所要求的相关指标的能力要求。文章分析了传统教学模式与OBE教学模式的不同,并以OBE为理念,从人才培养方案、教学内容、教学方法及考核方式等几个方面进行了改进,旨在提高学生的课堂学习效果及复杂工程解决能力,满足应用型人才培养的需要。

语种： 中文

作者： 汪爱河;张伟;李好;蒋海燕;张纯

期刊： 产业与科技论坛,2020年19(04):242-243 ISSN：1673-5641

作者机构： 湖南城市学院市政与测绘工程学院;[汪爱河; 张纯; 李好; 蒋海燕; 张伟] 湖南城市学院

关键词： 给排水科学与工程;实践教学;工程素质

摘要： 提高给排水科学与工程专业学生工程素养,建立给排水科学与工程专业实践综合平台是近几年高等教育工程人才培养值得探索和研究的课题。本文从目前给排水科学与工程专业实践教学改革必要性,提出构建基于工程素质的\"三结合、四层次\"给排水实践教学体系,深化给排水科学与工程专业实践教学改革,切实提高学生工程素质。

语种： 中文

作者： Zhang, Chun*;Wang, Aihe;Jiang, Haiyan;Deng, Yumei;Yang, Ying

期刊： Transactions of the Indian Institute of Metals,2020年73(7):1755-1761 ISSN：0972-2815

通讯作者： Zhang, Chun

作者机构： [Wang, Aihe; Deng, Yumei; Yang, Ying; Zhang, Chun; Jiang, Haiyan] Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.

通讯机构： [Zhang, Chun] H;Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.

关键词： Zinc hydrometallurgy;Reductive leaching residue;Heavy metals;Environmental activity;Ecological assessment

摘要： Zinc hydrometallurgy residue is one of the main sources of heavy metals in the environment. The chemical components and mineralogical characteristics of the reductive leaching residue was obtained by ICP-AES, XRD and SEM + EDS analysis. The results showed that the main heavy metals in the residue were Pb, Zn, Cd and As. Pb, Zn and Cd in the residue existed as PbSO4, ZnS and CdS, respectively. The three-step sequential extraction procedure study showed that Zn and Cd mainly existed as oxidizable form; Pb and As mainly existed as the residue form. The leaching toxicity results using sulfuric acid and nitric acid method showed that the leaching toxicity of Zn and Cd exceeded the reference values. The potential ecological risk assessment results of heavy metals of the residue showed that the sequence of the environmental activity and ecological risk was Cd > Zn > As > Pb. Cadmium contributed to the potential risk index more greatly than any other heavy metal in the residue and the contribution rate reached 98.9%, which showed that the cadmium in the reductive leaching residue threw the greatest threat to the ecological environment.

语种： 英文

作者： 汪爱河;李好;张纯;蒋海燕

期刊： 四川水泥,2020年(4):294 ISSN：1007-6344

作者机构： 湖南城市学院 市政与测绘工程学院, 湖南 益阳 413000;[汪爱河; 张纯; 李好; 蒋海燕] 湖南城市学院

关键词： 新工科;实践教学;工程能力

摘要： 针对新工科教育发展下人才培养的要求,分析了地方本科院校给排水科学与工程专业实践教学的现状,针对性地提出了实践教学改革的方案,提高学生工程能力与素质,促进专业发展。

语种： 中文

作者： Zhang, Chun*;Jiang, Haiyan;Deng, Yumei;Wang, Aihe

期刊： RSC Advances,2019年9(54):31645-31653 ISSN：2046-2069

通讯作者： Zhang, Chun

作者机构： [Wang, Aihe; Deng, Yumei; Zhang, Chun; Jiang, Haiyan] Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Peoples R China.

通讯机构： [Zhang, Chun] H;Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Peoples R China.

摘要： Antimony pollution resulting from industrial production is a great threat to the environment, ecology and the human body. Zero-valent iron powder is low-cost and easy to obtain. Nevertheless, the lower adsorption capacity limits its application when it is used as an adsorbent. In the present study, ball-milling and acid modification were developed to change its surface characteristics and γ-Fe2O3, γ-FeOOH and Fe3O4 were obtained after treatment, which promoted its adsorption capacity. Compared with the raw iron powder, the adsorption capacities for Sb(iii) and Sb(v) using the modified material were increased from 12.93 mg g-1 and 5.47 mg g-1 to 17.96 mg g-1 and 10.58 mg g-1, respectively. The study showed that the experimental data fitted the Langmuir model and the pseudo-first-order kinetic model better; the adsorption process was monolayer and chemically controlled at pH 5.0 ± 0.2. XPS and FT-IR analysis showed that Fe-O-Sb bonds arose during the adsorption process. The effect of pH on the adsorption capacity was also studied and the pH affected the adsorption of Sb(v) more than the adsorption of Sb(iii). In addition, the modified iron powder presented better efficiency when applied to the removal of low levels of antimony in drinking water. Based on the increase of adsorption capacity and low cost, iron powder should be a promising adsorbent for aqueous antimony removal. © 2019 The Royal Society of Chemistry.

语种： 英文

作者： 王轩宇;张纯;张伟

期刊： 湖南城市学院学报(自然科学版),2019年28(03):27-30 ISSN：1672-7304

作者机构： 湖南城市学院 市政与测绘工程学院,湖南 益阳,413000;[张纯; 王轩宇; 张伟] 湖南城市学院

关键词： 天津市;海绵城市;低影响开发;海绵城市试点区

摘要： 随着我国城镇化建设的快速推进,城市地面硬化率不断增加,原有城市排水系统难以满足城市排水需求,城市建设与生态环境之间的冲突逐渐加剧,城市内涝、黑臭水体现象日趋严重.天津作为国家第2批海绵城市试点城市,已经有了一定的建设成果.本文根据我国提出的海绵城市建设方法,介绍了低影响开发理念在天津市城市规划与建设的应用,详细介绍了天津市海绵系统空间构建、排水系统安全保障的"大海绵"具体措施,同时介绍了透水铺砖、下凹式绿地及雨水花园等"小海绵"具体做法,逐步建设起能满足城市需求以及自然保护的城市排水与雨水综合利用设施系统.

语种： 中文

作者： 周俊;张纯;汪彩文;蒋海燕;邓玉梅

期刊： 产业与科技论坛,2019年18(15):249-250 ISSN：1673-5641

作者机构： 湖南城市学院市政与测绘工程学院;[周俊; 张纯; 邓玉梅; 蒋海燕; 汪彩文] 湖南城市学院

关键词： 应用型;本科院校;青年教师;师资队伍;工程实践能力

摘要： 当前我国地方本科院校青年教师工程实践能力的缺乏已成为制约工程实践教育发展的重要因素之一。本文以湖南城市学院为例,分析了学校青年教师队伍工程实践能力偏低的原因,提出了以政策与制度为导向,加强青年教师队伍内外建设,校企联合搭建工程实践能力提升平台的措施。

语种： 中文

作者： 张纯;汪彩文;汪爱河;蒋海燕;李好

期刊： 高教学刊,2019年(17):155-156,159 ISSN：2096-000X

作者机构： 湖南城市学院 市政与测绘工程学院,湖南 益阳,413000;[汪爱河; 张纯; 李好; 蒋海燕; 汪彩文] 湖南城市学院

关键词： 专业认证;工程教育;工程能力

摘要： 针对国际工程教育认证的要求,结合我校给排水科学与工程专业准备专业认证的契机,分析了目前专业在应用型人才培养中存在的问题,针对性地修订了人才培养方案和课程体系,提高学生工程能力与素质,促进专业办学内涵式发展。

语种： 中文

作者： Zhang, Chun*;Wang, Aihe;Jiang, Haiyan;Deng, Yumei

期刊： Transactions of the Indian Institute of Metals,2019年72(10):2591-2597 ISSN：0972-2815

通讯作者： Zhang, Chun

作者机构： [Wang, Aihe; Deng, Yumei; Zhang, Chun; Jiang, Haiyan] Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.

通讯机构： [Zhang, Chun] H;Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.

关键词： Iron recovery;Oxydrolysis;Goethite;Zinc neutral leaching residue;Magnetic seeds

摘要： The recovery of iron is the key step for zinc recycling by electrolysis in zinc hydrometallurgy industry. Iron exists mainly as ferrites in the zinc neutral leaching residue and is difficult to decompose. In this paper, the reductive leaching process using sulfur dioxide was adopted to replace the traditional hot-acid leaching method, and the magnetic seed-assisted iron precipitation was developed. Under the optimum reductive leaching conditions, the initial concentration of sulfuric acid, the temperature and the partial pressure were determined as: 80 g/L H2SO4, 90 degrees C, 200 kPa at the fixed liquid/solid ratio of 10:1 and the stirring speed of 400 rpm. The most suitable iron precipitation reaction conditions were as follows: the pH: 3.0-3.5; the temperature: 95 degrees C. The recovery of iron mainly depended on the oxydrolysis of the ferrous. The ferrous precipitated as goethite and its crystallinity noticeably decreased with decreasing pH. The addition of the magnetic seeds shortened the reaction time from 4.5 to 3.0 h when the iron precipitation rate reached more than 99%. Simultaneously, the loss rates of zinc and cadmium in the iron process were also reduced from 10.96% and 9.27% to 4.23% and 3.73%, respectively. Besides, the sedimentation and filtration performance were greatly improved after the addition of magnetic seeds. The adsorption and inclusion were the main reasons for better sedimentation and filtration performance and higher metal loss rate.

语种： 英文

作者： Li, Yuanping;Chen, Yanrong;Chen, Yaoning*;Wu, Yanxin;Zhang, Chun;...

期刊： Sustainability,2019年11(8):2229 ISSN：2071-1050

通讯作者： Chen, Yaoning

作者机构： [Zhang, Chun; Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Peoples R China.;[Chen, Yanrong; Chen, Yaoning; Peng, Zhen; Wang, Sha; Wu, Yanxin; Liu, Yihuan; Zeng, Ziping; Xu, Ran] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Chen, Yanrong; Chen, Yaoning; Peng, Zhen; Wang, Sha; Wu, Yanxin; Liu, Yihuan; Zeng, Ziping; Xu, Ran] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

通讯机构： [Chen, Yaoning] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

关键词： composting;Actinomycetes communities;PCR-DGGE;quantitative PCR;regression analysis;redundancy analysis

摘要： The objective of this study was to investigate the influence of physico-chemical parameters on Actinomycetes communities and to prioritize those parameters that contributed to Actinomycetes community composition during the composting of agricultural waste. Denaturing gradient gel electrophoresis of polymerase chain reaction (PCR-DGGE) and redundancy analysis (RDA) were used to determine the relationships between those parameters and Actinomycetes community composition. Quantitative PCR (qPCR) and regression analysis were used to monitor the 16S rDNA copy numbers of Actinomycetes and to analyse the correlations between physico-chemical parameters and Actinomyces 16S rDNA gene abundance, respectively. The RDA results showed that moisture content, water soluble carbon (WSC) and pH (p < 0.05) made the main contributions to the temporal variations of Actinomycetes community composition. The output of the regression analysis indicated that moisture content (R2 = 0.407, p < 0.01) showed a negative linear relationship with the Actinomyces 16S rDNA gene abundance. © 2019 by the authors.

语种： 英文

作者： 张纯;汪爱河;汪彩文;邓玉梅

期刊： 产业与科技论坛,2019年18(13):161-162 ISSN：1673-5641

作者机构： 湖南城市学院市政与测绘工程学院;[汪爱河; 张纯; 邓玉梅; 汪彩文] 湖南城市学院

关键词： 工程应用;独立思考;解决能力;人才培养

摘要： 本文针对目前湖南城市学院给排水科学与工程专业工程应用型人才培养过程中遇到的问题及学生独立思考与解决能力的欠缺,提出了从工程设计能力、创新研究能力及社会能力多渠道来培养学生的工程-独立思考-解决能力,旨在为地方应用型工科院校学生工程问题解决能力的培养提供借鉴作用。

语种： 中文

作者： 周俊;张纯;汪彩文;李好

期刊： 现代职业教育,2018年(13):35 ISSN：2096-0603

作者机构： 湖南城市学院市政与测绘工程学院,湖南 益阳,413002;[周俊; 张纯; 李好; 汪彩文] 湖南城市学院

关键词： 应用型地方本科院校;工程型教师;给排水科学与工程

摘要： 师资队伍建设是应用型地方本科院校可持续发展的根本。针对工程型师资队伍建设中面临的各类问题,结合湖南城市学院市政与测绘工程学院工程型师资队伍建设的实践经验,提出了以工程实践能力培养为主线组织专业教师团队,通过搭建教师工程能力提升平台,完善制度保障体系,内部培训和外部引进等方式,解决了工程型教师的成长和发展问题。

语种： 中文

作者： Wang, Aihe;Zhou, Kanggen*;Chen, Wei;Zhang, Chun;Liu, Xing;...

期刊： Korean Journal of Chemical Engineering,2018年35(8):1636-1641 ISSN：0256-1115

通讯作者： Zhou, Kanggen

作者机构： [Chen, Wei; Wang, Aihe; Liu, Xing; Chen, Quanzhou; Zhang, Chun; Liu, Fang; Zhou, Kanggen] Cent S Univ, Inst Environm Sci & Engn, Sch Met & Environm, Lushan South Rd 932, Changsha 410083, Peoples R China.;[Wang, Aihe] Hunan City Univ, Sch Municipal & Mapping Engn, Yingbin East Rd 518, Yiyang 413000, Hunan, Peoples R China.

通讯机构： [Zhou, Kanggen] C;Cent S Univ, Inst Environm Sci & Engn, Sch Met & Environm, Lushan South Rd 932, Changsha 410083, Peoples R China.

关键词： Metal Composite Oxides;Calcium Alginate;Fluoride;Adsorption Isotherm;Adsorption Kinetic;Regeneration

摘要： Batch experiments were conducted to study the adsorption performance of fluorine removal by the calcium alginate (SA) embedded by the composite Mg-Al-Ce oxides (SA-CMAC). The physical and chemical properties of the SA-CMAC were characterized by XRD, SEM and XPS analysis. The optimum conditions for fluoride removal were determined and the maximum adsorption capacity was 26.12mg g−1. The co-existing PO4 3− and CO3 2− anions in solution had more effect than the SO4 2− and NO3 - on the fluoride removal efficiency. The adsorption process of fluorine by SA-CMAC was attributed to ion exchange on the surface of the SA-CMAC. The experimental data fitted both the isotherms and Freundlich well, and the Freundlich model had a little higher correlation coefficient. As the rate determining step, the adsorption process could be best described by the pseudo-second order kinetic model followed by the intra-particle diffusion. The thermodynamic examination demonstrated that the fluoride adsorption on the SA-CMAC beads was reasonably spontaneous and exothermic. The reclaimed adsorbents still could adsorb 65% of the total fluoride in the solution after three cyclic processes using 0.01mol/L NaOH. © 2018, Korean Institute of Chemical Engineers, Seoul, Korea.

语种： 英文

作者： Wang Aihe;Zhou Kanggen*;Liu Xing;Liu Fang;Zhang Chun;...

期刊： Journal of Colloid and Interface Science,2017年505:947-955 ISSN：0021-9797

通讯作者： Zhou Kanggen

作者机构： [Wang Aihe; Chen Quanzhou; Liu Xing; Zhou Kanggen; Liu Fang] Cent S Univ, Sch Met & Environm, Lushan South Rd 932, Changsha 410083, Hunan, Peoples R China.;[Wang Aihe; Zhang Chun] Hunan City Univ, Sch Municipal & Mapping Engn, Yingbin East Rd 518, Yiyang 413000, Hunan, Peoples R China.

通讯机构： [Zhou Kanggen] C;Cent S Univ, Sch Met & Environm, Lushan South Rd 932, Changsha 410083, Hunan, Peoples R China.

关键词： Aluminum;Aluminum alloys;Fluorine compounds;Ions;Magnesium alloys;Metallic compounds;Metals;Negative ions;Ternary alloys;Zirconium;Zirconium alloys;Adsorption behaviour;Adsorption mechanism;Fluoride;Granular adsorbent;Metal oxides;Adsorption;adsorbent;aluminum;calcium alginate;fluoride;magnesium;zirconium;adsorption kinetics;Article;chemical interaction;embedding;pH;priority journal;temperature;thermodynamics

摘要： A novel adsorbent embedding Mg-Al-Zr mixed oxides with millimetre-sized calcium alginate beads (SA-CMAZ) was synthesized, characterized, and applied for the secondary removal of fluoride from wastewater. Key factors affecting the fluoride adsorption, including initial fluoride concentration, contact time, initial pH and coexisting anions, were investigated. The results showed that fluoride could be removed by SA-CMAZ over a wide pH range, from 4 to 10. The presence of coexisting anions weakened the adsorption of fluoride, and the decreasing order of the removal towards fluoride was PO43−&gt;CO32−&gt;SO42−&gt;NO3−. The adsorption follows a pseudo second order kinetic with theoretical adsorption capacity (Qe,cal) and experimental adsorption capacity (Qe,exp) close to each other at the temperatures of 303K, 308K, and 313K. The equilibrium data could be fitted by the Freundlich isotherm model as the SA-CMAZ is a heterogeneous. The value of the thermodynamic parameter indicated an endothermic adsorption process. A negative value shows the feasibility and spontaneity of the material-anion interaction. © 2017 Elsevier Inc.

语种： 英文

作者： 周俊;张纯;汪爱河;汪彩文;邓玉梅

期刊： 价值工程,2017年36(33):186-187 ISSN：1006-4311

作者机构： 湖南城市学院市政与测绘工程学院,益阳,413002;[汪爱河; 周俊; 张纯; 邓玉梅; 汪彩文] 湖南城市学院

关键词： 给排水科学与工程;实践教学体系;校企合作;企业实践课程

摘要： 校企合作是实现学生工程能力培养的重要途径,针对学校给排水科学与工程专业在培养工程应用型人才上实践教学体系上存在的不足,通过深化校企合作打造层次完整、特色鲜明的实践教学体系。依托企业开发实践教学资源,以工程项目设计为牵引设置实践课程体系,建立健全教学管理制度、评价办法和教育教学质量保障体系,加强学生工程实践能力的培养,为本科应用型院校的人才培养探索出一套有特色的实践教学体系。

语种： 中文

作者： 张纯;闵小波;张建强;王密;李辕成

期刊： 中国有色金属学报,2016年26(1):197-203 ISSN：1004-0609

通讯作者： Min, Xiao-Bo(mxbcsu@163.com)

作者机构： [王密; 张建强; 闵小波; 张纯; 李辕成] School of Metallurgy and Environment, Central South University, Changsha, China;[闵小波] Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha, China;[张纯] School of Municipal and Mapping Engineering, Hunan City University, Yiyang, China

通讯机构： School of Metallurgy and Environment, Central South University, Changsha, China

关键词： 中浸渣;还原浸出;二氧化硫;动力学

摘要： 以锌冶炼中浸渣为研究对象,研究中浸渣的化学成分及锌的存在形态,锌主要以铁酸锌形式存在。采用SO_2做还原剂,研究温度、初始硫酸浓度、二氧化硫分压对锌浸出效率的影响,并分析中浸渣中锌还原浸出反应机制及动力学。结果表明:H+在锌还原浸出过程中起关键作用,锌还原浸出反应活化能为31.67 kJ/mol,为化学反应控制;SO_2做还原剂时,反应时间、液固比及初始酸度均大幅降低。反应最佳工艺条件:初始硫酸浓度80 g/L、温度95 ℃、液固比(L/S) 10 mL/g、二氧化硫分压200 kPa、反应时间120 min。该工艺条件下,中浸渣中锌浸出率达99%以上。XRD和ICP分析表明:中浸渣中铁酸锌分解,硫化锌在该反应条件下未完全浸出,还原浸出渣中主要化学成分为铅和锌,主要物相为PbSO_4和ZnS。

语种： 中文

作者： Zhang, Chun;Min, Xiaobo*;Zhang, Jianqiang;Wang, Mi;Li, Yuancheng;...

期刊： Journal of Cleaner Production,2016年113:910-918 ISSN：0959-6526

通讯作者： Min, Xiaobo

作者机构： [Zhang, Jianqiang; Wang, Mi; Li, Yuancheng; Zhang, Chun; Min, Xiaobo; Fei, Jiangchi] Cent S Univ, Sch Met & Environm, Inst Environm Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Zhang, Chun] Hunan City Univ, Sch Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Min, Xiaobo] Chinese Natl Engn Res Ctr Control & Treatment Hea, Changsha 410083, Peoples R China.

通讯机构： [Min, Xiaobo] C;Cent S Univ, Sch Met & Environm, Inst Environm Sci & Engn, Changsha 410083, Hunan, Peoples R China.

关键词： Cadmium;Cadmium sulfide;Electrolytic cleaning;Ferrite;Hydrometallurgy;Leaching;Particle size;Pollution;Reaction kinetics;Sulfur;Sulfur determination;Sulfur dioxide;Sulfuric acid;Zinc;Zinc compounds;Acid concentrations;Chemical reaction control;Effects of temperature;Electrolytic production;Leaching mechanism;Reductive leaching;Zinc ferrite;Zinc sulfide (ZnS);Zinc sulfide

摘要： Large quantities of cadmium-containing zinc neutral leaching residues (ZNLR) are produced constantly in the electrolytic production of zinc, creating serious cadmium pollution. In order to solve the problem and realize a clean zinc production process, a new reductive cleaning leaching process using sulfur dioxide as reducing agent has been developed, in which the beneficiation of cadmium pollution factor is solved. The cadmium leaching mechanisms were briefly analyzed and the effects of temperature, initial sulfuric acid and partial pressure of sulfur dioxide on the kinetics of cadmium dissolution in the mixed SO2+H2SO4 system was investigated. The order of reaction with respect to particle size, initial sulfuric acid concentration and partial pressure of sulfur dioxide at the fixed liquid/solid ratio and stirring speed were determined as -0.98, 1.49 and 0.51, respectively. Diffraction peak of zinc ferrite or cadmium-bearing zinc ferrite disappeared and the main compositions of the reductive leaching residue were lead sulfate (PbSO4), zinc sulfide (ZnS) according to the XRD analysis. © 2015 Elsevier Ltd.

语种： 英文

作者： 汪爱河;张纯;张伟;邓玉梅

期刊： 中国给水排水,2016年32(17):81-84 ISSN：1000-4602

作者机构： [汪爱河; 张纯; 张伟; 邓玉梅] 湖南城市学院市政与测绘工程学院, 湖南, 益阳, 413000

关键词： 硫酸活化;剩余污泥;氨氮;吸附

摘要： 采用污水厂剩余污泥作为原料,以硫酸作为活化剂制备吸附剂,并将其应用到含氨氮废水处理中。进而系统地研究了溶液初始pH值、氨氮初始浓度、吸附时间等因素对硫酸活化市政污泥吸附氨氮的影响。结果表明,在吸附剂投加量为2 g/L、PH值为7.5、温度为303 K条件下,硫酸活化市政污泥对氨氮的吸附效果最佳。吸附动力学和热力学研究结果表明,吸附剂对氨氮的吸附过程可用准二级动力学模型(R~2=0.998 6)来描述,且均符合Langmuir等温吸附模型、Freundl-ich等温吸附模型和Temkin等温吸附模型。由Langmuir等温吸附模型计算得到活化市政污泥对氨氮的最大吸附容量为44.84 mg/g。颗粒内扩散速率也是其吸附反应的限制因素,但不是唯一限制因素。该研究表明硫酸活化剩余污泥可以作为处理含氨氮废水的材料。

语种： 中文

作者： 张纯;闵小波;王密;张建强;李辕成

期刊： 过程工程学报,2015年15(6):1034-1038 ISSN：1009-606X

通讯作者： Min, X.-B.

作者机构： [李辕成; 闵小波; 张建强; 王密] School of Metallurgical and Environment, Central South University, Changsha, Hunan 410083, China;School of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan 413000, China;[张纯] School of Metallurgical and Environment, Central South University, Changsha, Hunan 410083, China, School of Municipal and Mapping Engineering, Hunan City University, Yiyang, Hunan 413000, China

通讯机构： [Min, X.-B.] S;School of Metallurgical and Environment, China

关键词： 冶炼废渣;铅;机械力化学;稳定;浸出毒性

摘要： 将不同添加剂与含铅冶炼烟气渣混合球磨,采用机械力化学方法研究渣中铅的固定效果,分析了渣的化学成分及浸出毒性,考察了添加剂对铅稳定率的影响,通过模拟酸处理实验研究废渣中铅稳定化机制. 结果表明,添加剂对铅机械力化学稳定性的促进顺序为铁粉>铝粉>FeSO_4>Fe_2O_3. 以铁粉作稳定剂、不锈钢球为球磨介质,废渣中铅稳定化的最佳参数为:稳定剂用量8%(w)、球料质量比8:1、球磨时间1.5 h、球磨转速400 r/min. 该条件下废渣中铅浸出毒性为0.258 mg/L,铅稳定率为99.77%. 酸处理过程中球磨样品中铁粉表面腐蚀产生的铁氧化物对铅离子的吸附是铅浸出毒性降低的主要原因.

语种： 中文