饮用水中的天然有机物去除方法探讨

天然有机物的去除对保证水质是至关重要的。本文阐述了天然有机物的性质和危害 ,并对天然有机物的去除方法进行了探讨     

溶解性有机物的特征及对环境污染物的影响

溶解性有机物是由成分复杂的非均质混合物组成,在环境中分布广泛,具有较高的稳定性和生物难降解性,对有机物污染物和重金属在环境中的迁移转化、生物有效性和毒性等有重要影响,而且在水处理过程中可能转化成有毒副产物。本文综述了溶解性有机物的结构特征以及对环境污染物的影响。     

生物活性滤池处理有机微污染源水的研究与发展浅析

阐述了生物活性滤池的净化机理,对预氧化、滤料介质、EBCT、反冲洗以及颗粒和絮体等影响生物活性滤池的因素进行了重点讨论。介绍了生物活性滤池的优势和国内外研究与发展的现状,并提出有待进一步研究的问题。     

滤池反冲水回流混凝工艺中溶解性有机物荧光特性

引言湖库水作为典型的低浊水源水,通常由于低的颗粒物浓度、小的颗粒尺寸、低的碰撞和聚集效率以及有机物更强亲水性,使常规混凝存在处理效果差、药剂用量大、产泥量多和出水残余铝含量高等缺点[1]。净水厂排泥水、滤池反冲洗水(FBWW)及二者的混合废水通常含有一定量悬浮固体、有机或     

天然有机物对纳滤水处理工艺的影响

天然有机物（NOM）广泛存在于天然水体中,对纳滤处理过程产生较大影响。该文在介绍NOM的组成和物化性质的基础上,讨论了NOM对截留率和膜通量的影响,阐述了纳滤过程中NOM的亲、疏水性,浓差极化效应,静电排斥作用,氢键作用,二价离子络合等对纳滤过程的影响机理,对提高纳滤膜过滤性能有重要意义。     

活性炭对水中有机物去除的研究进展

目前我国大部分城市水源受到不同程度污染,在常规处理工艺不能有效工作的情况下,活性炭可作为饮用水处理深度处理、预处理的有效手段。通过对活性炭的基本特性、活性炭的吸附机理、活性炭去除水中有机物的影响因素以及活性炭表面化学性质改性方法进行综述,总结归纳出可联合不同的改性方法对活性炭表面进行改性,以达到更好的改性效果,从而提高活性炭对饮用水中有毒有害有机物的去除率。     

长三角区域饮用水水源中可同化有机碳的研究

对长三角区域不同饮用水水源中可同化有机碳（AOC）进行了测定。试验结果表明：长江（镇江段）和钱塘江（杭州段）原水中AOC平均浓度分别为102μg/L和113μg/L．黄浦江上游原水中AOC浓度相对较高,平均值为188μg／L。三种不同原水中AOC均以能被P17细菌利用的有机物为主。主要包括大部分氨基酸、多种羧基酸、碳水化合物和芳香族等有机物,而能被NOX细菌利用的羧基酸在原水中只占一小部分。长江（镇江段）和钱塘江（杭州段）原水中AOC占溶解性有机碳（DOC）的平均比例分别为5.9％和6.1％,黄浦江上游原水中AOC占DOC的平均比例为3．3％。长三角区域饮用水水源中AOC与DOC呈一定的正相关性．AOC／DOC与DOC呈一定的反相关性。     

Horizontal Flow Filtration Bed: Impact on Removal of Natural Organic Matter and Iron Co-Existing in Water Source

Removal of natural organic matter and iron co-existing in water source is a challenge and a major problem in the developing world where the most commonly applied process in water treatment is pre-chlorination which results in early formation chlorinated by-products. Results from this study proved that horizontal roughing filter system with natural pumice is a promising option for pre-treatment of such waters. The filter recorded average reductions of total and ferrous iron of 39% and 89%, respectively, and trihalomethanes formation potential of 35% after 1 hour and 29% after 6 hours along the filter. Further reductions of 49% and 61% were achieved when the pretreated water was subjected to coagulation.     

电厂反渗透及离子交换除盐系统去除水中有机物的试验

该文介绍了安徽省火电厂锅炉补给水处理系统中反渗透及离子交换除盐系统去除水中TOC的情况,比较了不同水处理工艺去除水中TOC的情况。结果表明省内火电厂的除盐水TOC含量基本上都能满足《火力发电机组及蒸汽动力设备水汽质量》(GB/T 12145—2008)中对除盐水TOC含量的要求。除盐水TOC含量主要取决于所采用的水处理工艺流程,基于反渗透的水处理工艺对水中的TOC去除率最高,除盐水的TOC含量也最低。     

Magnetic Ion Exchange (MIEX) Treatment of Surface Water,Groundwater, and Landfill Leachate Wastewater: Effect on Organic Matter Fluorescence

Dissolved organic matter (DOM) is increasing in many drinking water supplies, which can have adverse impacts on treatment. Magnetic ion exchange (MIEX) is an advanced treatment process that has been shown to effectively remove DOM from different water sources. DOM removal efficiency is typically determined through dissolved organic carbon (DOC) and ultraviolet absorbance (UVA) measurements, but these methods can be limited in the amount of information they provide on DOM. Fluorescence spectroscopy has been suggested as a more robust characterization technique for monitoring DOM, but there remain gaps in knowledge between DOM removal processes and fluorescence characterization of DOM. Accordingly, the goal of this research was to evaluate the impact of MIEX treatment on DOM fluorescence for diverse water sources. MIEX jar tests were conducted using surface water, synthetic water, groundwater, and landfill leachate wastewater, and analyzed for DOC, UVA, and fluorescence excitation-emission matrix (EEM). Fluorescence EEMs were used to determine fluorophore location, intensity, and fluorescence index. MIEX removal of DOC and UVA were strongly correlated with MIEX removal of peak fluorescence intensity across all water sources. Peak fluorescence location indicated that MIEX preferentially removed terrestrial DOM. Fluorescence is a promising tool for monitoring DOM removal efficiency by MIEX treatment.     

臭氧活性炭联合工艺去除微污染水中有机物

采用臭氧活性炭联合工艺(O3+BAC)对以长江为水源的某水厂砂滤水进行深度处理。试验结果表明,该工艺对水中有机物有稳定的去除效果,在臭氧投加量为1mg/L,活性炭空床接触时间为8.6min时,对CODMn,UV254,DOC,THMEP(三氯甲烷生成势)和AOC(可同化有机碳)的平均去除率分别为32%,40%,22%,19%,7%。在DOC较低的情况下,三氯甲烷生成势与UV254有较好的正相关性。