An air purification system includes a conduit extending between an inlet and an outlet, each in fluid communication with an enclosed environment. Ambient air from the enclosed environment enters the conduit via the inlet and treated air exits the conduit and enters the enclosed environment via the outlet. The system further includes a fibrous filter disposed within the conduit and configured to treat the ambient air thereby generating the treated air, and a renewal unit disposed within the conduit and configured to renew the fibrous filter.

The object of the present invention is a new cryopolymerization process that provides crosslinked polymeric materials in the form of a macroporous gel (cryogel) capable of sequestering (neutralize) the anticoagulant heparin, its low molecular weight derivatives (LMWH and ULMWH) and heparinoids, from aqueous solutions, physiological solutions and biological fluids, such as whole blood, serum and plasma. A further object of the invention are also crosslinked polymeric materials in the form of a macroporous gel (cryogel) obtained by the cryopolymerization process of the invention that, thanks to said specific process, result to be comprised of varying proportions of HEMA and HEMA-R monomers. The molar ratio between the components (HEMA/HEMA-R) may vary between 99.9% HEMA:0.1% HEMA-R and 0.1% HEMA:99.9% HEMA-R. Object of the invention is also the use of crosslinked polymeric materials in the form of a macroporous gel (cryogel) obtainable by the cryopolymerization process of the invention for the construction of filters, membranes or devices for the treatment of biological fluids. A further object of the invention are therefore filters, membranes, or devices for the treatment of biological fluids which comprise materials obtained by the cryopolymerization process of the invention.

The object of the present invention is a new cryopolymerization process that allows to obtain crosslinked polymeric materials in the form of a macroporous gel (cryogel) capable of sequestering (neutralize) the anticoagulant heparin, its low molecular weight derivatives (LMWH and ULMWH) and heparinoids, from aqueous solutions, physiological solutions and biological fluids, such as whole blood, serum and plasma.

A further object of the invention are also crosslinked polymeric materials in the form of a macroporous gel (cryogel) obtained by the cryopolymerization process of the invention that, thanks to said specific process, result to be comprised of varying proportions of HEMA and HEMA-R monomers. The molar ratio between the components (HEMA/HEMA-R) may vary between 99.9% HEMA:0.1% HEMA-R and 0.1% HEMA:99.9% HEMA-R.

Object of the invention is also the use of crosslinked polymeric materials in the form of a macroporous gel (cryogel) obtainable by the cryopolymerization process of the invention for the construction of filters, membranes or devices for the treatment of biological fluids.

A further object of the invention are therefore filters, membranes, or devices for the treatment of biological fluids which comprise materials obtained by the cryopolymerization process of the invention.

The present application provides a wet scrubber system for treating a flow of flue gases with dioxins therein with a flow of a fluid. The wet scrubber system may include a column member, a packed bed positioned within the column member, and an activated carbon filter bed system in communication with the column member such that at least a portion of the flow of the fluid passes through the activated carbon filter bed system to remove the dioxins therein before being recirculated back to the column member.

A liquid suspension comprised of ferrous sulfide particles and method of using the same for the removal of selenium from industrial gas. Said liquid suspension may be (1) directly injected, or (2) coated onto or into a substrate and then injected into an industrial gas containing selenium to remove said selenium from the industrial gas stream in a dry scrubber system. Said liquid suspension of ferrous sulfide particles may also be used to remove selenium contained in industrial gases in a wet scrubber system.

Implementations disclosed herein provide a dry chemical scrubber with a pH regulator that adjusts an internal pH value of the dry chemical scrubber by adding high pH elements to the contents of the dry chemical scrubber on a continuous or periodic basis.

A liquid suspension comprised of ferrous sulfide particles and method of using the same for the removal of selenium from industrial gas. Said liquid suspension may be (1) directly injected, or (2) coated onto or into a substrate and then injected into an industrial gas containing selenium to remove said selenium from the industrial gas stream in a dry scrubber system. Said liquid suspension of ferrous sulfide particles may also be used to remove selenium contained in industrial gases in a wet scrubber system.

A method for producing a copolymer for semiconductor lithography containing less metal impurities, and a method for purifying a polymerization initiator for production of the copolymer, are provided. The method for purifying a polymerization initiator to be used for production of a polymer includes a filtering step wherein a solution of a polymerization initiator dissolved in an organic solvent is allowed to pass through a filter having a nominal pore size of not more than 1.0 m, to reduce the sodium content of the polymerization initiator solution to not more than 300 ppb with respect to the weight of the polymerization initiator. Further, the method for producing a copolymer for semiconductor lithography includes a polymerization step wherein the polymer for semiconductor lithography is synthesized by a radical polymerization reaction in the presence of a polymerization initiator purified by the above purification method.