Sorbent compositions for the removal of boron from aqueous mediums
AssigneeADA Carbon Solutions, LLC
InventorsMicala D. Mitchek, Roger H. Cayton, Joseph M. Wong, Robert B. Huston, Lingyan Song
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Abstract
Sorbent compositions that include a base sorbent material having a high porosity and surface area and a boron-selective agent are particularly useful for the sequestration of boron from waste materials such as coal combustion residual leachate (CCRs). By using a boron-selective agent in conjunction with a high surface area base sorbent material such as activated carbon or biochar, a sorbent composition with a high capacity for sequestering boron at relatively low cost is provided.
Claims20
A method of treating an aqueous medium, comprising contacting an aqueous medium comprising a boron contaminate with a particulate base sorbent material and a boron selective agent, wherein the boron selective agent attaches to the particulate base sorbent material, wherein the particulate base sorbent material is different from the boron selective agent, and wherein the particulate base sorbent material captures at least a portion of the boron contaminate,
- wherein the particulate base sorbent material is com 1 ith the aqueous medium comprising a boron contaminate, and divalent and/or trivalent ions, and
- wherein the divalent and/or trivalent ions are selected from the group consisting essentially of Ca2+, Cu2+, Zn2+, Fe2+, Fe3+, Al3+, and combinations thereof.
A method of treating an aqueous medium, comprising:
- contacting an aqueous medium comprising a boron contaminate with a sorbent composition, wherein the sorbent composition captures at least a portion of the boron contaminate from the aqueous medium, and wherein the sorbent composition comprises a boron selective agent attached to a particulate base sorbent material, the boron selective agent different from the particulate base sorbent material and comprising a compound selected from the group of compounds comprising 1,2 hydroxyl groups, 1,2 carboxyl groups, 1,2 carbonyl groups, 1,3 hydroxyl groups, 1,3 carboxyl groups, 1,3 carbonyl groups, and combinations thereof.
A method of treating an aqueous medium, comprising:
- dispersing a boron selective agent into an aqueous medium comprising a boron contaminate;
- and
- contacting the aqueous medium comprising the boron contaminate with a particulate base sorbent material,
- wherein the particulate base sorbent material and the boron selective agent are different,
- wherein the boron selective agent attaches to the particulate base sorbent material,
- wherein the particulate base sorbent material captures at least a portion of the boron contaminate, and
- wherein the boron selective agent comprises a compound selected from the group of compounds comprising 1,2 hydroxyl groups, 1,2 carboxyl groups, 1,2 carbonyl groups, 1,3 hydroxyl groups, 1,3 carboxyl groups, 1,3 carbonyl groups, and combinations thereof.
Dependencies are inferred from the claim text.