Abstract:
This disclosure relates to a method that includes (1) contacting a solvent with a porous cyclodextrin-based metal organic framework (CD-MOF) adsorbed with CO 2 to release CO 2 , and (2) collecting the released CO 2 . The CD-MOF includes at least a metal cation and a plurality of cyclodextrin components.
Abstract:
Recycling spent hydrophobic polymeric media can beneficially utilize waste oil to dissolve the media. The method employs simple equipment and materials, many or all of which are already on location in various industrial operations such as fracking operations or food production factories. The method does not call for landfilling spent media, thus reducing the environmental impact and reducing expense. Transport costs for spent media and disposal fees can likely decrease. The resulting product can be sold to refineries for further processing and repurposing, thus generating additional revenue.
Abstract:
The invention describes a method for removing organic impurities that comprise a steroid skeleton or one derived therefrom from water, whereby the contaminated water is contacted with a thermoplastic elastomer, whereby organic impurities are absorbed and/or adsorbed in the thermoplastic elastomer.
Abstract:
The present invention relates to systems and methods for controlling the atmosphere in the cabin (1) of a vehicle. The system comprises a carbon dioxide removal conduit (2) comprising a regenerable carbon dioxide removal chamber (5,6) containing a carbon dioxide sorbent material and a regeneration circuit (7) arranged to expel the desorbed carbon diocide at a location exterior (8) of the cabin (1) The system is operable to maintain a carbon dioxide level below l000ppm in the passenger cabin for a period of at least 5 minutes while restricting the flow of air from outside the vehicle into the passenger cabin to 10L/s or less.
Abstract:
Method of reducing the arsenic concentration in an aqueous solution comprising undesired arsenic, which method comprises contacting the aqueous solution with a complex of Formula (I), (Formula (I)) wherein M1 and M2 are the same or different and are independently selected from V, Mn, Ga, Cu, Ni, Co, Fe or Zn; wherein a is 0, or 1, and b is 0, or 1, provided that a + b together must be at least 1; Q is a negatively charged counter ion; n is from 1 to 5; X1 is OH, 0, SH or S; L1 is a group selected from -La1-C(O)NR-, -La2-C(O)OR-, -La3-NRC(O)-, La4-OC(O)-, La5-O- or La6-NRO-, wherein La1, La2, La3, La4, La5 and La6 are each C1-6 alkyl, optionally substituted, R is H or C1-6 alkyl optionally substituted; Linker is a polyethylene glycol (PEG) chain with from 1 to 10 repeating units, a C1-16 polyamine chain or a C1-16 alkyl chain; Z is a solid support; L2 to L7 are independently C1-3 alkyl, optionally substituted; and Het1 to Het4 are independently 5 to 14 membered heteroaryl group having at least one N atom and optionally substituted.
Abstract:
The invention pertains to a method for removing phosphate from a phosphate-containing water fraction comprising the steps of a) continuously providing a phosphate-containing water fraction to a holding tank comprising an adsorbent in the form of a suspension, b) continuously withdrawing a purified water stream through an ultrafiltration membrane and passing a water stream over the ultrafiltration membrane and recycling it to holding tank, wherein the volume ratio between the volume of the water stream withdrawn through the ultrafiltration membrane per second and the volume of the water stream passed over the ultrafiltration membrane per second is at least 4:1 and less than 20:1, c) periodically stopping step b), and providing a water stream through the membrane, countercurrent to the withdrawal direction in step b) to form an adsorbent-containing water stream, d) collecting the adsorbent-containing water stream in a collection vessel, wherein the adsorbent concentration in the adsorbent collection vessel is at least 3 and at most 100 times the adsorbent concentration in the holding tank. It has been found that the specific combination of an adsorbent in the form of a suspension in a holding tank, the use of an ultrafiltration membrane with a limited amount of recycle, and a specific membrane cleaning operation makes it possible to combine efficient operation and low water circulation with obtaining a low phosphate content in the product.
Abstract:
A solid desiccant cooling system and method of operating a solid desiccant cooling cycle is provided comprising a desiccant support structure (130) for cyclic movement of solid desiccant between a first location where a solid desiccant (132) contacts a source of air to be dehumidified (112) and a second location with a solid desiccant is regenerated (124). A heat exchange arrangement (138) is provided preferably at the first location. The heat exchange arrangement (138) provides a heat exchange or thermal engagement of a heat exchange fluid (119) e.g. water, with the desiccant containing tubes (132). The proposed method and apparatus cools the desiccant while dehumidification of air (112) is conducted. Preferably, the heat exchange fluid (119) is provided to the desiccant support structure (130) at a position at or adjacent its longitudinal axis, to flow radially therefrom.
Abstract:
A regeneration circuit for regeneration of a dialysis fluid. An inlet (11) and an outlet (12) are arranged to pass a dialysis fluid to and from the regeneration circuit by means of a pump (13). An adsorbent cartridge (14) is arranged downstream of the pump and comprises an adsorbent (16) made of e.g. activated carbon and an adsorbent (17) made of metal-complexed chitosan and possibly further adsorbents. Downstream of the last adsorbent is arranged a further general adsorbent (18) arranged to adsorb metal ions, such as copper ions, possibly given off by previous adsorbents. Such a general adsorbent (18) is an adsorbent made of uncomplexed chitosan, which adsorb metal ions and does not adsorb physiological electrolytes commonly included in a dialysis fluid, such as sodium, potassium, calcium and magnesium ions.
Abstract:
According to the invention there is provided a biosorbent comprising at least one of watermelon rind, sugarcane bagasse and garden grass. Preferably, all three are present in synergistic quantities. Also provided for are methods of removing toxins from a material, remediating land and adsorbing metal/s from a material such as wastewater.