人工湿地处理污水技术及其在吉林省西部应用的可行性研究     

刘国  何春光  王元彪  许模 《地球科学进展》2004,19(13):206-210

人工湿地是通过模拟自然湿地人为设计建造的，利用基质、植物和微生物这一复合生态系统的物理、化学及生物的协调互用，通过过滤、吸附、共沉淀、离子交换、植物吸附和微生物分解来实现对废水的高效净化。通过对吉林省西部湿地的实地考察，对该地的自然、经济、社会状况等条件加以分析，认为人工湿地处理污水在该地具有可行性，不仅具有处理污水的环保效益，而且具有对湿地盐碱化改良、湿地退化遏制的生态、社会效益，改善土壤的理化性质，以及废水资源化用于灌溉、种植芦苇等经济作物的经济效益。最后还对人工湿地的处理技术提出了一些建议并指出其前景及今后关注聚焦点。  相似文献   

氯化钙体系对松香废水的絮凝处理   总被引：2，自引：1，他引：2  

黄国林 《华东地质学院学报》1997,20(4):396-400

本文报道了氯化钙和硫酸铝或聚丙烯酰胺组成的处理体系对松香废水进行的絮凝研究，全面分析了福建省南平林化厂废水的物质组成和污染指标。通过正交试验，确定处理的主要影响因素。结果表明，用该体系处理松香废水，比用单一絮凝剂，能更好地降低废水的化学耗氧量，树脂及色度，为治理松香废水提供了较充分的数据。  相似文献   

天然沸石作为阳离子交换剂在环境保护中的应用   总被引：1，自引：0，他引：1  

Pansi.  M 张立生 《地质科学译丛》1997,14(3):40-47,49

本文叙述了在环境保护中利用天然沸石的研究动态。综述由４部分构成。第一部分介绍能在工业领域内应用的阳离子交换流程以及这些流程赖以建立的原理。第二部分讨论城市和工业污水除ＮＨ＾＋４，报道了主要大型工厂的工作成果以及最重要和最新的实验数据。  相似文献   

选矿技术渗透到一些边缘学科     

肖志培 《江苏地质科技情报》1994,(4):18-19

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Study on treatment of wastewater from acid in-situ leaching of uranium ore with sulfate reducing bacteria     

Qingliang WANG 《中国地球化学学报》2006,25(B08):180-180

Synthetic surfactants are among the most widely used chemicals in the world （around 10 millions of tons are produced per year）, mainly as key components in detergent formulation, apart from other applications such as wetting agents or emulsifiers. Coastal ecosystems receive large quantities of these compounds and, after a relatively fast partial degradation in water, the remaining quantities end up in the sediments due to their high affinity for organic carbon in the particulate phase. We therefore focused our studies on sediments because they can be assumed to play an important environmental role acting as a sink for these contaminants. Moreover, because of their widespread use and source specificity, surfactants can usefully be employed as molecular indicators in sediments for more general contamination caused by human activities. This work deals with the vertical distribution in sediment cores of the main anionic surfactants, both linear alkylbenzene sulfonates （LAS） and alkyl ethoxysulfates （AES）, and non-ionic surfactants, including nonylphenol polyethoxylates （NPEOs） and alcohol polyethoxylates （AEOs）. In the case of LAS their degradation metabolites sulfophenyl carboxylic acids （SPCs） are also studied. The processes considered are degradation, sorption and diffusion occurring along the sedimentary column for the different homologues contained in the commercial surfactant mixtures. The most hydrophobic surfactants such as NPEOs and AEOs remain strongly attached to the particulate phase whereas polar metabolites such SPCs tend to be present in the pore water. Highest values of surfactants are found near the surface and, in most cases, there is a decrease in their concentration down the sediment core. Furthermore, the reduction in the average length of the ethoxylated chain in polyethoxylated surfactants, as well as the increase in the concentrations of SPCs at depths showing redox potential from -300 to -400 mV, suggests that surfactants may be degraded anaerobically in the sediment. In the case of LAS, these field results are compared with the data from laboratory experiments carried out in order to determine sorption capacity and anaerobic degradation.  相似文献   

即时合成Zn-Mg-Al层状双氢氧化物处理含Zn2+废水实验研究     

樊明德  陈天虎  刘景丽  王健  宋垠先 《矿物学报》2006,26(3):261-266

在模拟含Zn2 废水中加入Mg2 和Al3 ,以NaOH为沉淀剂,研究金属盐水解即时合成层状双氢氧化物(LDH)去除Zn2 的可行性。详细探讨了体系终点pH值、配料中Mg2 /Zn2 摩尔比值及反应温度和时间对Zn2 去除率的影响,结合X射线衍射分析(XRD)探讨了Zn2 去除机理,并与化学沉淀法进行了比较。结果表明,实验条件下只有pH值显著影响Zn2 去除率(p<0.05),在9.0~11.0范围内去除效果最佳,达99%以上。通过XRD分析结合即时合成法特点,废水中Zn2 主要是在晶体生成阶段以Zn-Mg-Al三元LDH化合物形式被去除的。与化学沉淀法相比,即时合成法效果更好,适用pH值范围更广,用来处理含Zn2 废水更具优势。  相似文献   

13X沸石处理含赖氨酸废水的实验研究     

王英滨姜波  李婧婧肖万 《岩石矿物学杂志》2007,26(1):90-94

用合成的13X沸石对废水中氨基酸(赖氨酸)进行静态吸附实验,研究了pH、温度、吸附时间、沸石用量等对吸附率的影响,结果表明,室温下沸石对赖氨酸的吸附平衡时间为30min,pH=pKa1=2.2时,赖氨酸在沸石上的吸附效果最好,吸附率大于82%,饱和吸附量达51.73mg.g-1。吸附等温线近似呈直线型,表明离子交换机制是沸石吸附氨基酸的主要方式。对已饱和吸附的沸石用饱和氯化钠溶液进行再生实验,赖氨酸的解吸率大于95%,沸石可重复使用。实验研究表明可用13X分子筛处理含氨基酸废水,为实际处理含氨基酸废水提供了可行性依据。  相似文献   

Experimental Study on Treatment of High-concentrated Sulfur Wastewater by Process of Depositing Natrojarosite and Its Environmental Significance          下载免费PDF全文

MA Shengfeng WANG Changqiu LU Anhuai GUO Yanjun HE Hongliao 《《地质学报》英文版》2007,81(2):330-334

High-concentrated sulfur wastewater with sodium and COD （chemical oxygen demand） up to 26000 mg/L from a chemical plant, Jiangsu Province of China has been treated by deposition of natrojarosite in lab. The results indicated that the COD of the wastewater was decreased sharply from 26000 mg/L to 1001 mg/L, with removal rate of COD up to 96% by twice precipitations of natrojarosite and twice oxidation of H202. The treated sulfur wastewater reached the requirement of subsequent biochemical treatment to water quality. The optimal operational parameters should be controlled on pH value between 2.50 and 3.20 and 50 g FeCly6H2O solid added in per liter wastewater. The study provided an experimental basis for pretreatment of high-concentrated sulfur wastewater and proposed a new mineralogical method on treatment of other wastewaters. Depositing process of jarosite and its analogs should be able to be used to treat wastewater from mine and other industries to remove S, Fe and other toxic and harmful elements, such as As, Cr, Hg, Pb, etc. in the water.  相似文献   

基于工程模糊集的水利工程施工废水处理方法与实践研究     

孙瑞君 《地下水》2018,(5):209-211

针对水利工程施工产生废水的污染源较为复杂、化学稳定性较差的问题,采用传统废水处理方法无法实现对废水的快速处理,处理能力有限。为此提出基于工程模糊集的水利工程施工废水处理方法与实践研究。依托工程模糊集欧内斯特理论对定量因子集、定性因子集进行计算,确定废水的组成与添加药剂比例。基于筛分楼对废水进行分层处理,将中间层废水进行沉淀处理,沉淀层直接进行脱水处理,引入净水池过滤,完成砂石料加工系统与基坑系统废水处理,对经过滤的水中添加定量的低分子无机絮凝剂和高分子无机絮凝剂,经精滤完成水利工程施工废水处理。试验数据表明,提出的工程模糊集废水处理方法较传统废水处理方法处理效率提高47.28%,适用于不同类型的水利工程施工废水处理。  相似文献   

Study on the flocculability of metal ions by<Emphasis Type="Italic">Bacillus mucilaginosus</Emphasis> GY03 strain   总被引：1，自引：0，他引：1  

连宾陈烨  袁生朱立军  刘丛强 《中国地球化学学报》2004,23(4):380-386

This study deals with the flocculability of two types of metal ions by Bacillus macilaginosus GY03 Strain, with an emphasis on the influence of pH conditions, volume and time of flocculants produced by GY03 Strain on the adsorption of metal irons such as Pb^2 and Mn^2 and the capabilities of floceulants to adsorb metal ions of different concentrations. The results showed that microbial flocculants produced by Bacillus mucilaginosus GY03 Strain are highly capable of flocculating metal ions, but show different effectiveness with respect to the adsorption of Pb^2 and Mn^2 . In accordance with the experimental data and actual waste-water treatment conditions, the relevant regression equation of floeculation has been deduced, which has found some application in practice. The experimental results of this study demonstrated that microbial flocculants produced by Bacillus mucilaginosus can be used to treat metallic ion-containing waste water. In practical application the volume of microbial floceulants required and flocculation conditions should be taken into comprehensive consideration in accordance with the properties of metal ions, the composition of anions and the solubility of other metals, in combination with the cost and effectiveness of floceulants to be used. Floeeulant used in this experiment has the advantages of being applied over a wide range of pH values, small flocculant volume, and rapid speed of floeeulation. So this kind of flocculant is within excellent prospect of application.  相似文献