Filters having improved permeability and virus removal capabilities
View Patent ↗A filter block having a permeability of greater than about 3.0*10 −9 cm 2 , and a F-VLR of greater than about 99% is provided. The filter block may be made of filter particles having a median particle size of less than about 50 microns and having a particle span of about 1.4 or less. The filter blocks of the present invention can be used to make a filter for filtering liquids and more specifically, for providing potable water. The filter particles may be mesoporous. Kits comprising filters and information relating to the killing or removal of bacteria, viruses, and microbials are also provided.
1. A filter block comprising activated carbon filter particles without any metallic biocides, wherein the filter block has permeability of greater than about 3.0*10 −9 cm 2 and a Filter Viruses Log Removal of greater than about 2 logs, and wherein the activated carbon filter particles have a median particle size of less than about 50 μm and having a particle span of about 1.4 or less.
2. The filter block of claim 1 , wherein the permeability is greater than about 3.5*10 −9 cm 2 .
3. The filter block of claim 1 , wherein the Filter Viruses Log Removal is greater than about 3 logs.
4. The filter block of claim 1 , further comprising a binder, wherein the activated carbon filter particles have a median particle size of less than about 40 μm.
5. The filter block of claim 1 , wherein the activated carbon filter particles are mesoporous activated carbon particles.
6. The filter block of claim 1 , wherein at least a portion of the filter particles are coated with polyvinylamine.
7. The filter block of claim 5 , wherein the sum of the mesopore and the macropore volumes of said mesoporous activated carbon particles is between about 0.2 mL/g and about 2 mL/g.
8. The filter block of claim 1 , wherein the block has a Filter Bacteria Log Removal of greater than about 4 logs.
9. The filter block of claim 1 , wherein the block is made by compression molding.
10. A filter for providing potable water, comprising:
(a) a housing having an inlet and an outlet;
(b) a filter block according to claim 1 ; and
(c) a pressure/flow control device.
11. A kit comprising:
i) a filter comprising the filter block according to claim 1 ; and
ii) a package for containing the filter; and
wherein either the package or the filter housing comprises information that the filter or filter material provides: bacterial removal; virus removal; microbial removal; microorganism removal, killing of bacteria, killing of viruses, killing of microbials, killing of microorganisms, or any combination of these.