混凝工艺对水中微量药物去除效果与影响因素研究

发布时间：2018-01-17 03:10

本文关键词：混凝工艺对水中微量药物去除效果与影响因素研究　出处：《北京林业大学》2012年硕士论文　论文类型：学位论文

【摘要】：天然水体中出现的药物类污染物(PhACs)引起人们的广泛关注,研究饮用水处理工艺对天然水体中的微量药物处理效果极为必要。本文以对乙酰氨基酚(ACE)、卡马西平(CBZ)、萘普生(NAP)、雌二醇(E2)和双氯芬酸(DCF)五种药物为目标物,采用静态烧杯试验,研究这五种药物在混凝过程中的去除规律,并重点考察了高岭土和腐殖酸投量等因素对不同种类药物去除效果的影响。试验中,采用去离子水和自来水作为原水,考察评价不同温度与pH值下混凝对药物的去除效果,投加高岭土和腐殖酸来模拟水源水中的悬浮颗粒和天然有机物,考察了混凝过程中高岭土和腐殖酸投加量对五种目标药物去除效能的影响。此外,研究了粉末活性炭对于药物的吸附作用,并在混凝过程中投加粉末碳,以研究混凝-吸附组合工艺对药物去除效果。试验发现：在未投加高岭土与腐殖酸的去离子水体系中进行硫酸铝混凝试验时,ACE与CBZ两种药物的最大去除率都不超过10%,五种药物中疏水性最高的DCF去除效果最好,最高去除率达到了33%；而在自来水中进行的试验混凝对药物的去除效果也并不理想：除E2外,其余各种药物去除率都在30%以下。高岭土加入后对ACE与CBZ的去除效果无明显影响,但对NAP、E2与DCF的去除则有显著的促进作用,最大去除率分别达到31.53%,36.46%和52.4%；而在不投加混凝剂时,单独高岭土对五种药物的最大吸附去除率仅有20%左右。腐殖酸的存在对E2的混凝去除效果有一定的抑制作用,但对于酸性药物DCF与NAP的去除则有较好的促进作用；腐殖酸与高岭土同时加入后,也出现了这一相同的趋势：NAP与DCF的去除效率得到增加,最大去除率分别达到了63.5%和66.6%。可见,当水中含有悬浮颗粒物及腐殖酸的情况下,混凝工艺对酸性药物(如NAP及DCF)有较好的去除效果。在混凝过程中投加粉末碳后,五种药物的吸附去除效果得到了较大提高,去除率均达到80%以上,而NAP、DCF与E2去除效果更为明显,达到了90%,说明“混凝-吸附”工艺对饮用水中药物的去除效果较好,是保证饮用水安全的一个可行方案。
[Abstract]:Pharmaceutical pollutants appear in natural waters (PhACs) caused widespread concern, research on drinking water treatment process of trace drug in natural water treatment effect is very necessary. In this paper, acetaminophen (ACE), C Masi Bing (CBZ), naproxen (NAP), estradiol (E2) and diclofenac (DCF five kinds of drugs) as object, using the static beaker test, study the removal law of the five drugs in the process of coagulation, and focuses on the effects of kaolin and humic acid dosage and other factors on the removal effect of different types of drugs. In the experiment, using deionized water and tap water as raw water, the evaluation of different temperature and pH value of coagulation on removal of the drug, suspended particles adding kaolin and humic acid to simulate water and natural organic matter, to investigate the effect of dosage on removal efficiency of five target drugs of kaolin and humic acid in the process of setting investment Can the effect. In addition, the research of powdered activated carbon for adsorption of drugs, and in the process of coagulation and adding carbon powder, in order to study the coagulation removal of drug adsorption combined process. The test showed that without adding kaolin and humic acid in deionized water system of aluminum sulfate coagulation test. ACE and CBZ two drugs, the maximum removal rate of less than 10%, the highest five DCF hydrophobic drug removal, the highest removal rate reached 33%; tests conducted in tap water coagulation on removal effect of drugs is not ideal: in addition to E2, the removal rate of the various drugs 30%. No obvious effects of kaolin added on the removal efficiency of CBZ and ACE, but for NAP, the removal of E2 and DCF is a significant role in promoting, the maximum removal rate reached 31.53%, 36.46% and 52.4%; and in addition of coagulant, single kaolinite The maximum adsorption of five antibiotics removal rate was only 20%. The presence of humic acid on E2 coagulation removal effect to a certain extent, but for the removal of acidic drugs DCF and NAP have good effect; humic acid and kaolin is added at the same time, also appeared the same trend. The removal efficiency of NAP and DCF increased, the maximum removal rate reached 63.5% and 66.6%.. When the water containing suspended particulate matter and humic acid under the condition that the coagulation process of acidic drugs (such as NAP and DCF) has a good removal effect. In the coagulation process of powdered carbon after removal the adsorption of five kinds of drugs have been improved greatly, the removal rate reached more than 80%, while NAP, DCF and E2 removal effect is more obvious, reaching 90%, indicating "coagulation adsorption" process of drugs in drinking water removal effect is good, is to ensure the safety of drinking water A feasible scheme.

【学位授予单位】：北京林业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R123.1

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