The Characteristics Of Interaction Between The“Quinine-goethite-microorganism”and Its Degradation Of Organic Pollutants

As is known to all, the iron element in the earth's surface and most of the iron element exists in the form of iron oxide in soils and sediments in the earth, at the same time these iron oxide iron reducing bacteria and some of the alienation of redoes reaction. Under the anaerobic environment, iron oxides in iron under the action of reducing bacteria will be generated reduction dissociation with active Fe(?), and the Fe(?) led to the degradation of pollutants. Iron reduction alienation not only affects the distribution of iron, but also for the distribution of trace elements and other nutrients and organic matter degradation plays an important role. Therefore, in the presence of the DOM, study of microbial iron reduction of alienation, has very important practical significance.The experiment of “Quinine-goethite-microorganism”based on the anthraquinone structure of AQDS(anthraquinone-2 disulfonic acid disodium) as the dissolved organic matter, by typical Shewanella putrefaciens and goethite as the object of study to explore the effects of different concentrations of AQDS goethite and alienation of goethite reduction process. Experimental results show that goethite content and the change of reaction system, Fedis/Feads ratio change is proportional to, and goethite reduction rate varied inversely; goethite concentrations from 0.5 mmol/L increased to 10 mmol/L, Fedis/Feads ratio from 0 increases to about 15, and goethite reduction rate reduced from 100% to 30%; after joining the AQDS goethite reduction average rate is not added before the 4-5 times; AQDS concentration from 0.025mmol/L increases to 0.3mmol/L, Fedis/Feadsratio from 0 increases to about 0.3, and goethite reduction rate increased from 50% to 60%. AQDS as an electron carrier, First, receive the electron donor electron and present in the reduced state by AH2QDS; this process to reach equilibrium, by AH2 QDS will receive the electron transfer to the needle iron ore, the goethite reduction dissociation, itself into electronic form of AQDS deficiency; finally, AQDS due to microbial metabolism into by AH2 QDS, until the reaction system reach perfectly balanced.This paper also expounds in anaerobic conditions on goethite, three triclosan 2,4-D microbial /non biological degradation characteristics and mechanism. However, in the natural environment, there is a complex and large amount of dissolved organic matter with sensitive sensory ability, which can also promote the degradation of organic pollutants.Thus, 2-sodium sulfonate two phenol(AQS) was added in the reaction system, and AQS as the electron carrier, containing the functional groups of the functional groups, which can promote the degradation of organic pollutants.. Organic matter degradation reaction to 2-sulfonic acid sodium anthracene diphenol(AQS) as electron carrier, triclosan and 2,4-D to organic pollutants in response to microbial metal reducing bacteria, Shewanella putrefaciens, of triclosan in under the action of microorganisms is the degradation characteristics and the degree of degradation, and expounds the under abiotic Fe2+ ions and biological effects on goethite/AQS content to the trichloro students degradation kinetic characteristics. Increase the degradation rate increased the degradation rate; reduce the increase of triclosan degradation experiments showed that goethite content increase will reduce the goethite reduction rate, inhibited the three triclosan degradation, goethite content from 0.1 to 10mmol/L, goethite reduction rate from 100% to 0%, three triclosan degradation rate from 80% down to 50%;AQS can promote goethite reduction dissociation and three triclosan degradation degree and improve the goethite reduction rate and three triclosan AQS content from 0 to 0.5 mmol/L, goethite reduction rate from 0% to 10%, three triclosan degradation rate from 60% to 70%;The addition of Fe2+ non biological system of three triclosan has significantly reduced, three triclosan degradation rate from 60% to 70%.The experiment of 2,4-D degradation shows: the increase of the content of goethite reduction rate will reduce the goethite, inhibition of 2,4-D degradation, goethite content increased from 0.1 to 10mmol/L, goethite reduction rate decreased from 90% to 0%, three triclosan degradation rate is reduced from 60% to 30%; AQS can promote the degradation process of goethite reduction the degree of dissociation and 2,4-D; the content of AQS increased from 0 to 0.5mmol/L, goethite reduction rate increases from 0% to 15%, three triclosan degradation rate increased from 30% to 55%; the addition of Fe2+ non biological system can effectively complete the degradation of 2,4-D, with the increase of the addition of Fe2+ content, the degradation rate of 2,4-D increased, goethite content increased from 0 to 10mmol/L, three triclosan degradation rate increased from 40% to 60%.