絮凝剂对含铜废水化学沉淀颗粒污泥性能的影响
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- 论文作者：叶丽君 ; 柴立元 ; 李青竹 ; 颜旭 ; 高梦思
- 年：2016
- 作者机构：中南大学冶金与环境学院;国家重金属污染防治工程技术研究中心;
- 论文关键词：沉降性能 ; 聚丙烯酰胺 ; 表面电性
- 英文论文关键词：settling performance ; polyacrylamide ; surface electrical behavior
- 会议召开时间：2016-12-01
- 会议录名称：第六届重金属污染防治及风险评价研讨会暨重金属污染防治专业委员会2016年学术年会论文集
- 语种：中文
- 分类号：X703.5
- 学会代码：HJKP
- 会议名称：第六届重金属污染防治及风险评价研讨会暨重金属污染防治专业委员会2016年学术年会
- 会议地点：中国福建厦门
- 主办单位：中国环境科学学会
- 学会名称：中国环境科学学会
- 页数：6
- 文件大小：1350k
- 原文格式：D
- 会议级别：全国
摘要
固液分离和污泥沉降性能是化学沉淀法处理含铜废水的关键。在化学沉淀过程中形成颗粒污泥可显著提高污泥沉降性能,絮凝剂的加入对颗粒污泥的形成尤其重要。本文探索了不同类型絮凝剂及其投加量对污泥沉降性能、表面电性和组成结构的影响。研究表明,在沉淀反应过程中污泥表面电位都在0 m V附近波动,即污泥呈电中性。最佳絮凝剂为非离子型聚丙烯酰胺,最佳投加量为3 mg/L,Cu2+的去除率在99.8%以上,污泥的沉降速率达到12.5 cm/s,相比絮状污泥提高了29倍(0.42 cm/s)。
Solid-liquid separation and settleability of sludge is always an key point of copper wastewater treatment by chemical precipitation. Formation granular sludge can significantly improve the settling performance during the chemical precipitation process. In addition, it is especially important to add flocculant for the formation of granular sludge. In this procedure, the effect of types and dosage of flocculant on settling performance, surface electrical behavior and composition of sludge were investigated. The results show that the surface potential of sludge was retained around 0 m V,namely sludge is electrically neutral during the chemical precipitation process. the Cu(II) removal efficiency is over 99.8% and the settling velocity of the sludge can reach up to 12.5 cm s~(-1) in optimal condition, i.e., PAM type of NPAM and PAM dosage of 3 g L~(-1). This settling velocity was about 41 times higher than that of chemical precipitation sludge.
Solid-liquid separation and settleability of sludge is always an key point of copper wastewater treatment by chemical precipitation. Formation granular sludge can significantly improve the settling performance during the chemical precipitation process. In addition, it is especially important to add flocculant for the formation of granular sludge. In this procedure, the effect of types and dosage of flocculant on settling performance, surface electrical behavior and composition of sludge were investigated. The results show that the surface potential of sludge was retained around 0 m V,namely sludge is electrically neutral during the chemical precipitation process. the Cu(II) removal efficiency is over 99.8% and the settling velocity of the sludge can reach up to 12.5 cm s~(-1) in optimal condition, i.e., PAM type of NPAM and PAM dosage of 3 g L~(-1). This settling velocity was about 41 times higher than that of chemical precipitation sludge.
引文
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[2]Yanxu L.A comparative study of abiological granular sludge(ABGS)formation in different processes for zinc removal from wastewater[J].Environ Sci Pollut Res,2014,21:12436-12444.
[3]Fu F,Wang Q.Removal of heavy metal ions from wastewaters:A review[J].Journal of Environmental Management,2011,92(3):407-418.
[4]吴昌永,王然登,彭永臻.污水处理颗粒污泥技术原理与应用[M].北京:中国建筑工业出版社,2011.
[5]李刚辉,沈一丁,李付萱,等.氟碳改性疏水缔合型阳离子聚丙烯酰胺的特性黏数及絮凝作用[J].石油化工,2007,36(5):492-496.
[6]杨建平,赵京波,张兴英.丙烯酰胺-丙烯酸钠共聚物絮凝剂的合成及性能研究[J].石油化工,2005(04):338-342.
[7]曾慧娟,林惠荣,叶长燊,等.非离子型聚丙烯酰胺在西梭霉素发酵液絮凝处理中的应用[J].福建化工,2003(3):17-19.
[8]卢红霞,刘福胜,于世涛,等.阳离子聚丙烯酰胺P(AM-DMC)的合成与表征[J].高分子材料科学与工程,2008,24(4):46-49.
[9]Mpofu P,Addai-Mensah J,Ralston J.Investigation of the effect of polymer structure type on flocculation,rheology and dewatering behaviour of kaolinite dispersions[J].International Journal of Mineral Processing,2003,71(1-4):247-268.
[10]Heath A R,Bahri P A,Fawell P D,et al.Polymer flocculation of calcite:Relating the aggregate size to the settling rate[J].AICh E Journal,2006,52(6):1987-1994.
[11]Zhou Y,Franks G V.Flocculation Mechanism Induced by Cationic Polymers Investigated by Light Scattering[J].Langmuir,2006,22:6775-6786.
[12]Gregory J.Particles in water:Properties and processes[M].Florida,U.S.:CRC Press,2006.
[13]Luo Y L,Yang Z H,Xu Z Y,et al.Effect of trace amounts of polyacrylamide(PAM)on long-term performance of activated sludge[J].J Hazard Mater,2011,189(1-2):69-75.
[14]Li L,Pan G.A Universal Method for Flocculating Harmful Algal Blooms in Marine and Fresh Waters Using Modified Sand[J].Environmental Science&Technology,2013,47(9):4555-4562.
[15]李海普.改性高分子药剂对铝硅矿物浮选作用机理及其结构—性能研究[D].长沙:中南大学,2002.
[16]Yan X,Li Q,Chai L,et al.Formation of abiological granular sludge–A facile and bioinspired proposal for improving sludge settling performance during heavy metal wastewater treatment[J].Chemosphere,2014,113:36-41.
[17]Shinde S K,Dubal D P,Ghodake G S,et al.Influence of Mn incorporation on the supercapacitive properties of hybrid Cu O/Cu(OH)2 electrodes[J].RSC Adv.,2015,5(39):30478-30484.
[18]Chen L,Li L,Li G.Synthesis of Cu O nanorods and their catalytic activity in the thermal decomposition of ammonium perchlorate[J].Journal of Alloys and Compounds,2008,464(1-2):532-536.
[19]舒成正.高性能阴离子型聚丙烯酰胺制备及其性能研究[D].华中师范大学,2012.
[20]陈和生,邵景昌.聚丙烯酰胺的红外光谱分析[J].分析仪器,2011(03):50-54.