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光催化及生物降解法处理有机磷农药废水 总被引:10,自引:0,他引:10
光催化及生物降解法处理有机磷农药废水1前言有机磷农药是70年代发展起来的农药新品种,目前我国各大农药生产厂均把有机磷农药作为基本品种,其产量约占全国农药总产量的80%以上,在生产过程中排放出大量的有毒物质,对环境造成严重的污染,因此对这类农药废水的治... 相似文献
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本文介绍采用气相色谱火焰光度法(GC-FPD)测定农药废水中总有机磷。用苯萃取废水申的有机磷农药,在表温1050—1080℃的石英反应管中通入氢气将有机磷农药还原生成磷化氢(pH_3),然后通过 GC-FPD 检测。试验证明了不同结构的有机磷农药转化率基本一致。本方法操作简便、准确、快速,对于有机磷农药总含量为0.5毫克/升的水祥,测定的相对平均误差为7.0%,相对偏差为8.5%。 相似文献
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有机磷农药废水生化治理现状及进展 总被引:7,自引:3,他引:7
通过对化工部83个农药厂的调查,分析了有机磷农药废水生化治理现状、特点及问题,介绍了国内有机磷农药废水生化处理科研动态及进展情况,并为深入开展有机磷农药废水生化处理工作提出了建议。 相似文献
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有机磷农药光催化分解的可行性研究 总被引:24,自引:1,他引:24
本文研究了不同半导体催化剂存在下。磷酸酯类及硫代磷酸酯类农药的光催化分解规律,1×10~(-4)摩尔/升有机磷农药水溶液在TiO_2存在下,pH为9时,半小时内有机磷完全转化成PO_4~(3-)。另外还研究了电子接受体H_2O_2对光解的影响,及采用太阳光做光源处理有机磷农药废水的可行性。 相似文献
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甲胺磷农药废水生化处理高效菌选育的研究 总被引:23,自引:1,他引:23
从用甲胺磷农药废水长期驯化的活污泥中,筛选得到两株降解甲胺磷农药废水中有机磷的高效菌,经鉴定一株为蜡样芽孢杆菌(Bacilluscereus)。另一株为嗜中温假单胞菌(Pseudomonasmesophilica)。确定了上述高效菌的最适生长条件和降解有机磷的能力,混合高效菌的有机磷去除率达99.7%。 相似文献
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生物活性炭法处理环链结构有机磷农药废水的研究 总被引:2,自引:0,他引:2
1.前言有机磷农药以其高效低残留在农业生产上得到广泛的应用,但其生产过程中排出的废水量较大,污染物成份复杂、浓度高。据统计,国内有机磷农药废水经治理后合格排放的尚不足7%,特别是环链结构的某些品种的生产废水尚无成熟的处理方法。本文报导了采用生物活性炭技术对水胺硫磷、甲基异柳磷、增效磷等环链结构有机磷农药生产混合废水进行处理的实验结果。 相似文献
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解磷微生物肥料的研究与进展 总被引:1,自引:0,他引:1
磷是植物生长必需的矿物质元素之一,在土壤中易被固定降低其有效性,目前,研究和生产含有解磷功能的微生物有机肥料是转化土壤中无效磷、提高磷肥利用率的有效途径之一。叙述了解磷微生物犯料中微生物的种类、生态分布规律和影响高效解磷微生物选育的外部因素,概述了解磷微生物菌肥的应用和研究进展,探讨了解磷微生物肥料的应用价值。为解磷微生物未来的研究重点提出理论依据。. 相似文献
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To assess the capacity of the natural environment for degrading plastics, the populations of poly(-hydroxybutyrate)(PHB)-and poly(-caprolactone)(PCL)-degrading aerobic microorganisms and their ratios to the total number of microorganisms in soil samples were estimated by the plate count method with agar medium containing emulsified PHB or PCL. The numbers of the degrading microorganisms were determined by counting colonies that formed clear zones on the plate. It was found that PHB- and PCL-degrading (depolymerizing) microorganisms are distributed over many kinds of material, including landfill leachate, compost, sewage sludge, forest soil, farm soil, paddy soil, weed field soil, roadside sand, and pond sediment. Of total colony counts, the percentages of PHB and PCL degrading microorganisms were 0.2–11.4 and 0.8–11.0%, respectively. The results suggest that many kinds of degrading microorganisms are present in each environment and that specific consortia differing in biodegradation capacity are constructed. 相似文献
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《Waste management (New York, N.Y.)》1999,19(2):133-139
Polyhydroxyalkanoates (PHAs) are energy/carbon storage materials accumulated under unfavorable growth condition in the presence of excess carbon source. PHAs are attracting much attention as substitute for non-degradable petrochemically derived plastics because of their similar material properties to conventional plastics and complete biodegradability under natural environment upon disposal. In this paper, PHA production and degradation in waste environment as well as its role in biological phosphorus removal are reviewed. In biological phosphorus removal process, bacteria accumulating polyphosphate (poly P) uptake carbon substrates and accumulate these as PHA by utilizing energy from breaking down poly P under anaerobic condition. In the following aerobic condition, accumulated PHA is utilized for energy generation and for the regeneration of poly P. PHA production from waste has been investigated in order to utilize abundant organic compounds in waste water. Since PHA content and PHA productivity that can be obtained are rather low, PHA production from waste product should be considered as a coupled process for reducing the amount of organic waste. PHAs can be rapidly degraded to completion in municipal anaerobic sludge by various microorganisms. © 相似文献
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A research note on the recalcitrance of carbon dioxide gas scrubbing compounds to biodegradation processes 下载免费PDF全文
Turlough F. Guerin 《补救:环境净化治理成本、技术与工艺杂志》2017,27(4):53-58
A laboratory study was conducted to determine the feasibility of biotreatment of liquid Sulfinol waste stored at a gas treatment facility. Sulfinol is used to scrub impurities from gas generated from both traditional gas extraction and that from hydraulic fracturing processes. Chemical characterization and microbiological assessment showed that cultures of Sulfinol‐degrading microorganisms could be enriched from Sulfinol‐contaminated soil containing saturated concentrations of Sulfinol: a mixture of di‐isopropanolamine (DiPA), sulfolane, and oxazolidone. Based on this initial finding from the enrichment culture study, batch reactors were incubated with inoculants from enrichment cultures containing known numbers of presumptive Sulfinol‐degrading microorganisms. The microbial analyses of liquors from batch reactors showed microbial inhibition and/or loss of viability due to Sulfinol toxicity, even at the lowest Sufinol waste concentration used (5 percent of the original waste). The changes in concentrations of the chemicals in the batch reactor trials were a result of chemical rather than biodegradation processes. Further research is recommended to develop repeatable strategies for biodegrading the constituents of Sulfinol under field conditions. 相似文献
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纳米二氧化钛光催化降解水中有机污染物的研究进展 总被引:45,自引:0,他引:45
TiO2在光催化降解水中有机污染物方面具有明显的优势。综述了pH、TiO2表面改性、载体、外加氧化剂及其他因素对TiO2光催化降解水中有机污染物催化活性的影响,讨论了光电催化 、太阳能利用等对光催化领域的推动作用,展望了这方面工作的发展方向。 相似文献
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Araceli Loredo-Treviño Gerardo Gutiérrez-Sánchez Raúl Rodríguez-Herrera Cristóbal N. Aguilar 《Journal of Polymers and the Environment》2012,20(1):258-265
Plastics are present in a lot of aspects of everyday life. They are very versatile and resistant to microbial attack. Polyurethanes
are used in several industries and are divided in polyester and polyether polyurethanes and there are different types among
them. Despite their microbial resistance, they are susceptible to the attack of fungi and bacteria but the mechanism to elucidate
its biodegradation are unknown. There are reports from bacteria and fungi that are capable of degrading polyurethane but the
studies about the enzymes that attack the plastic are focused on bacterial enzymes only. The enzymes reported are of type
esterase and protease mainly since these enzymes are very unspecific and can recognize some regions in the polyurethane molecule
and hydrolyze it. Fungal enzymes have been studied prior the 1990s decade but recently, some authors report the use of filamentous
fungi to degrade polyurethane and also report some characteristics of the enzymes involved in it. This review approaches polyurethane
biodegradation by focusing on the enzymes reported to date. 相似文献