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    • 1. 发明授权
    • In-well air stripping and adsorption
    • 井内空气汽提和吸附
    • US06254310B1
    • 2001-07-03
    • US09566508
    • 2000-05-08
    • Suthan S. Suthersan
    • Suthan S. Suthersan
    • E21B4338
    • E21B43/385B09C1/002B09C1/005B09C1/08B09C2101/00E21B43/122
    • A method and system for removing contaminants from the phreatic zone, also known as the saturation zone, or groundwater. The technique preferably involves gas sparging while slowing down the sparging process by placing packing balls into an eductor tube. A preferred embodiment of the system is comprised of a means for supplying gas to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system may also contain a conduit within the well which extends below the water table. The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent to the water table. The system may further comprise an eductor tube contained in the conduit which extends from the top extent of the conduit to the saturation zone. Packing balls may be located between the eductor tube and the means for supplying gas to the lower extent of the well. The system may also include separating the gas bubbles from the groundwater at the top of the conduit.
    • 用于从潜水区域(也称为饱和区域)或地下水中去除污染物的方法和系统。 该技术优选地包括气体喷射,同时通过将包装球放置在喷射管中来减慢喷射过程。 系统的优选实施例包括用于将气体供应到井的下部范围的装置,其引起地下水和气泡向上的井的流动。 该系统还可以包含位于井底下方的井内的导管。 导管具有位于水台下方的较低流体可渗透部分和与水台相邻的上部流体可渗透部分。 该系统可以进一步包括包含在导管中的喷射管,其从导管的顶部延伸到饱和区。 包装球可以位于喷射管和用于向井的下部供应气体的装置之间。 该系统还可以包括将气泡与管道顶部的地下水分离开。
    • 5. 发明授权
    • Method for biogeochemical stabilization of chromate-impacted solids
    • 铬酸盐冲击固体​​的生物地球化学稳定化方法
    • US08703078B2
    • 2014-04-22
    • US13005705
    • 2011-01-13
    • Jeff B. GillowJohn F. HorstSuthan S. Suthersan
    • Jeff B. GillowJohn F. HorstSuthan S. Suthersan
    • C01G37/00
    • A62D3/37A62D3/02A62D2101/24A62D2101/43A62D2203/02B09C1/08
    • The invention relates to a system and method for the substantially permanent biogeochemical stabilization of solids impacted with hexavalent chromium/Cr(VI), including chromite ore processing residue (“COPR”). The invention comprises a novel treatment method of adding amendment(s) to COPR or other chromate impacted solids for the purpose of (1) weathering COPR minerals (when present) to convert the minerals that control alkalinity of the COPR to non-alkaline forms and liberate incorporated hexavalent chromium (Cr(VI)) in the process; (2) providing a chemical reductant (ferrous iron) to rapidly and permanently reduce the available Cr(VI) to trivalent form (Cr(III)); and/or (3) supporting longer-term biogeochemical Cr(VI) reduction enhanced by recycling of the chemical reductant, ultimately rendering the material non-hazardous as measured by acceptable methods. Amendments include but are not limited to acids; sources of ferrous iron; fermentable organic carbon source(s); and/or a source of active anaerobic microbes.
    • 本发明涉及用六价铬/铬(VI)(包括铬铁矿加工残渣(COPR))冲击的固体的基本永久的生物地球化学稳定化的系统和方法。 本发明包括对COPR或其它铬酸盐冲击固体​​添加修饰的新型处理方法,用于(1)风化COPR矿物(当存在时)将控制COPR的碱度的矿物转化为非碱性形式, 在该过程中释放掺入的六价铬(Cr(VI)); (2)提供化学还原剂(亚铁)以快速且永久地将可用的Cr(VI)还原成三价形式(Cr(III)); 和/或(3)通过再循环化学还原剂来增强长期生物地球化学Cr(VI)的还原,最终使材料以可接受的方法测量而无危险。 修正包括但不限于酸; 二氧化铁来源; 可发酵有机碳源; 和/或活性厌氧微生物来源。
    • 6. 发明授权
    • Method of making and using nanoscale metal
    • 制造和使用纳米级金属的方法
    • US06777449B2
    • 2004-08-17
    • US10026329
    • 2001-12-19
    • David VanceSuthan S. SuthersanPeter Palmer
    • David VanceSuthan S. SuthersanPeter Palmer
    • B01F312
    • B09C1/08B01J13/0043B09C1/002
    • When elemental iron is in the presence of chlorinated compounds (contaminants) a naturally occurring reaction takes place and the chlorinated compounds are reduced and form harmless compounds. The production of extremely small metal particles containing elemental iron or a mixture of elemental iron and a second metal is imperative to this method of treating contaminants and is the subject of the present invention. When the particle is made small enough a surfactant is not required for the particle to do its job. The elemental metal may be kept in an elemental state by keeping it in an oxygen-scavenging environment. This is achieved by either suspending the nanoscale metal in a carbohydrate solution or by injecting a carbohydrate solution in atomized form into the gas used to inject the metal into the subsurface soil. Additionally, the present invention is to a method of using elemental metal to reductively dehalogenate halogenated hydrocarbons, to reduce soluble metals and to treat metalloids in subsurface soil.
    • 当元素铁存在氯化化合物(污染物)时,发生天然存在的反应,并且氯化化合物被还原并形成无害化合物。 生产含有元素铁或元素铁和第二种金属的混合物的极小的金属颗粒对于这种处理污染物的方法是必不可少的,并且是本发明的主题。 当颗粒制得足够小时,颗粒不需要表面活性剂来完成其工作。 元素金属可以通过保持在氧气清除环境中而保持在元素状态。 这是通过将纳米级金属悬浮在碳水化合物溶液中或通过将雾化形式的碳水化合物溶液注入用于将金属注入地下土壤中的气体来实现的。 此外,本发明是一种使用元素金属来还原卤代卤代烃,减少可溶性金属和在地下土壤中处理准金属的方法。
    • 7. 发明授权
    • Engineered in situ anaerobic reactive zones
    • 工程原位无氧反应区
    • US06632364B1
    • 2003-10-14
    • US09877948
    • 2001-06-08
    • Suthan S. Suthersan
    • Suthan S. Suthersan
    • C02F328
    • C02F3/306B09C1/002B09C1/10B09C2101/00C02F2101/20C02F2101/322C02F2101/36Y10S210/903Y10S210/908Y10S210/912Y10S210/913
    • An in situ method and system for reductive dechlorination, the precipitation of chromium, the precipitation of heavy metals, and microbial denitrification. The invention comprises the formation of in situ anaerobic reactive zones to precipitate and filter out dissolved heavy metals as metallic sulfides, to degrade nitrate to nitrogen gas, to reduce chlorinated hydrocarbons to ethene, and to precipitate and filter out chromium. The invention is comprised of an injection well or wells that extend into a contaminated groundwater. A conduit located within the injection well conveys a reagent to the contaminated groundwater. The reagent may be a carbohydrate rich solution. Microbes digest the carbohydrates to produce sulfate reducing and methanogenic conditions within the reactive zone that include a dissolved oxygen level less than about 0.5 mg/l, a redox potential less than about −250 mv, and a dissolved organic carbon to contaminant ratio of greater than about 50:1. These biogeochemical conditions lead to the reduction of PCE to TCE to DCE to VC and eventually to ethene. These biogeochemical conditions also lead to the precipitation of heavy metals, the precipitation of chromium, and microbial denitrification.
    • 还原脱氯,铬沉淀,重金属沉淀和微生物脱氮的原位方法和系统。 本发明包括形成原位厌氧反应区,以沉淀和过滤作为金属硫化物的溶解重金属,将硝酸盐降解为氮气,将氯代烃还原成乙烯,并沉淀并过滤出铬。 本发明包括注入井或延伸到污染地下水中的井。 位于注射井内的导管将试剂输送到污染的地下水。试剂可以是富含碳水化合物的溶液。 微生物消化碳水化合物以在反应性区域内产生硫酸盐还原和产甲烷条件,其包括小于约0.5mg / l的溶解氧水平,小于约-250mv的氧化还原电位,以及溶解的有机碳与污染物的比例大于 约50:1。 这些生物地球化学条件导致PCE对TCE的减少到DCE到VC,最终还原为乙烯。 这些生物地球化学条件也导致重金属沉淀,铬沉淀和微生物脱氮。
    • 8. 发明授权
    • Engineered in situ anaerobic reactive zones
    • 工程原位无氧反应区
    • US06322700B1
    • 2001-11-27
    • US09630790
    • 2000-08-02
    • Suthan S. Suthersan
    • Suthan S. Suthersan
    • C02F300
    • C02F3/306B09C1/002B09C1/10B09C2101/00C02F2101/20C02F2101/322C02F2101/36Y10S210/903Y10S210/908Y10S210/912Y10S210/913
    • An in situ method and system for reductive dechlorination, the precipitation of chromium, the precipitation of heavy metals, and microbial denitrification. The invention comprises the formation of in situ anaerobic reactive zones to precipitate and filter out dissolved heavy metals as metallic sulfides, to degrade nitrate to nitrogen gas, to reduce chlorinated hydrocarbons to ethene, and to precipitate and filter out chromium. The invention is comprised of an injection well or wells that extend into a contaminated groundwater. A conduit located within the injection well conveys carbohydrates and sulfates to the contaminated groundwater. Microbes digest the carbohydrates to produce sulfate reducing and methanogenic conditions within the reactive zone that include a dissolved oxygen level less than about 0.5 mg/l, a redox potential less than about −250 mv, and a dissolved organic carbon to contaminant ratio of greater than about 50:1. These biogeochemical conditions lead to the reduction of PCE to TCE to DCE to VC and eventually to ethene. These biogeochemical conditions also lead to the precipitation of heavy metals, the precipitation of chromium, and microbial denitrification.
    • 还原脱氯,铬沉淀,重金属沉淀和微生物脱氮的原位方法和系统。 本发明包括形成原位厌氧反应区,以沉淀和过滤作为金属硫化物的溶解重金属,将硝酸盐降解为氮气,将氯代烃还原成乙烯,并沉淀并过滤出铬。 本发明包括注入井或延伸到污染地下水中的井。 位于注射井内的导管将碳水化合物和硫酸盐输送到污染的地下水。 微生物消化碳水化合物以在反应性区域内产生硫酸盐还原和产甲烷条件,其包括小于约0.5mg / l的溶解氧水平,小于约-250mv的氧化还原电位,以及溶解的有机碳与污染物的比例大于 约50:1。 这些生物地球化学条件导致PCE对TCE的减少到DCE到VC,最终还原为乙烯。 这些生物地球化学条件也导致重金属沉淀,铬沉淀和微生物脱氮。
    • 9. 发明授权
    • Insitu anaerobic reactive zone for insitu metals precipitation and to
achieve microbial de-nitrification
    • 本土厌氧反应区用于本土金属沉淀和实现微生物脱硝
    • US5554290A
    • 1996-09-10
    • US420234
    • 1995-04-11
    • Suthan S. Suthersan
    • Suthan S. Suthersan
    • B09C1/00B09C1/10C02F3/30C02F3/28
    • C02F3/306B09C1/002B09C1/10B09C2101/00C02F2101/20C02F2101/322C02F2101/36Y10S210/912
    • An insitu method and system for removing dissolved heavy metals and nitrates from groundwater is disclosed. The invention comprises the formation of insitu anaerobic reactive zones to precipitate and filter out dissolved heavy metals as metallic sulfides and to degrade nitrate to nitrogen gas. The invention is comprised of an injection well or wells into a saturated zone that contains dissolved heavy metals or nitrate contaminated groundwater. A conduit, located within the injection well, pumps carbohydrates in the case of nitrates, into the contaminated groundwater. Indigenous microbes digest the carbohydrates, producing an anaerobic condition within the reactive zones. In the presence of sulfates, the sulfates are reduced to sulfide ions. The sulfides readily combine with the dissolved heavy metal ions and form insoluble precipitates. The resultant precipitates are filtered out by the soil matrix within and down gradient of the reactive zones. In the case of nitrates, the anaerobic conditions formed within the reactive zones convert the nitrate first to nitrite and then to nitrogen gas which is eventually stripped out of the groundwater.
    • 公开了一种从地下水中去除溶解的重金属和硝酸盐的方法和系统。 本发明包括形成本地厌氧反应区,以沉淀和过滤作为金属硫化物的溶解重金属,并将硝酸盐降解成氮气。 本发明包括注入井或进入含有溶解的重金属或硝酸盐污染的地下水的饱和区的井。 位于注射井内的导管将硝酸盐的碳水化合物泵入污染的地下水中。 土着微生物消化碳水化合物,在反应性区域内产生厌氧条件。 在硫酸盐存在下,硫酸盐还原成硫化物离子。 硫化物容易与溶解的重金属离子结合并形成不溶性沉淀。 所得沉淀物通过土壤基质在反应性区域内和向下的梯度内过滤掉。 在硝酸盐的情况下,反应区内形成的厌氧条件首先将硝酸盐转化为亚硝酸盐,然后将氮气最终从地下水中排出。