公开(公告)号：US12037266B2

公开(公告)日：2024-07-16

申请号：US17606505

申请日：2020-10-10

申请人： Cody M. Flood ,  Chad A. Coolidge ,  Jason M. Belitsky ,  Dennis M. Flood ,  Dennis J. Flood

发明人： Cody M. Flood ,  Chad A. Coolidge ,  Jason M. Belitsky ,  Dennis M. Flood ,  Dennis J. Flood

IPC分类号： C02F1/28 ,  B01J20/20 ,  B01J20/26 ,  B01J20/28 ,  B01J20/30 ,  C02F1/32 ,  C02F1/72 ,  C02F101/36

CPC分类号： C02F1/288 ,  B01J20/20 ,  B01J20/26 ,  B01J20/28016 ,  B01J20/2808 ,  B01J20/28083 ,  B01J20/28085 ,  B01J20/3071 ,  C02F1/32 ,  C02F1/725 ,  C02F1/281 ,  C02F1/283 ,  C02F1/285 ,  C02F2101/36 ,  C02F2101/40 ,  C02F2303/14 ,  C02F2305/10

摘要： A specially functionalized composite filter material with a high specific surface area is used to adsorb PFAs from potable water. In a preferred embodiment, the base filter material is granular activated carbon (GAC), which is sequentially coated with a thin layer of polydopamine, a thin layer of partially oxidized iron, and a thin coating of octadecylamine. After PFAs are adsorbed onto the coated GAC particles, the PFAs are removed by a rinsing process, and remain in the rinse effluent. GAC particles are recovered and recoated as needed to restore their adsorptive capacity. The PFA-containing effluent is treated using photochemical processes to destroy the PFA molecules. The now PFA-free effluent can be disposed of as a non-hazardous material. The composite filter material works in systems ranging from small passive systems for personal use to large scale, high-flow-rate utility water treatment systems.

公开(公告)号：US20220204363A1

公开(公告)日：2022-06-30

申请号：US17606505

申请日：2020-10-10

申请人： Cody M. Flood ,  CHAD A. COOLIDGE ,  JASON M. BELITSKY ,  DENNIS M. FLOOD ,  DENNIS J. FLOOD

发明人： Cody M. Flood ,  CHAD A. COOLIDGE ,  JASON M. BELITSKY ,  DENNIS M. FLOOD ,  DENNIS J. FLOOD

IPC分类号： C02F1/28 ,  C02F1/32 ,  C02F1/72 ,  B01J20/20 ,  B01J20/26 ,  B01J20/28 ,  B01J20/30

摘要： A specially functionalized composite filter material with a high specific surface area is used to adsorb PFAs from potable water. In a preferred embodiment, the base filter material is granular activated carbon (GAC), which is sequentially coated with a thin layer of polydopamine, a thin layer of partially oxidized iron, and a thin coating of octadecylamine. After PFAs are adsorbed onto the coated GAC particles, the PFAs are removed by a rinsing process, and remain in the rinse effluent. GAC particles are recovered and recoated as needed to restore their adsorptive capacity. The PFA-containing effluent is treated using photochemical processes to destroy the PFA molecules. The now PFA-free effluent can be disposed of as a non-hazardous material. The composite filter material works in systems ranging from small passive systems for personal use to large scale, high-flow-rate utility water treatment systems.