CPC C02F 1/283 (2013.01) [B01J 20/0229 (2013.01); B01J 20/0259 (2013.01); B01J 20/04 (2013.01); B01J 20/20 (2013.01); B01J 2220/42 (2013.01); B01J 2220/4831 (2013.01); C02F 2101/105 (2013.01)] | 12 Claims |
1. A method of adsorbing phosphate, said method comprising the step of contacting an adsorbent composition with a liquid composition comprising the phosphate,
wherein the phosphate in the liquid composition is adsorbed by the adsorbent composition, and
wherein the adsorbent composition comprises i) a carbon-containing material, ii) nitrogen, and iii) one or more metals, wherein the carbon-containing material is biochar, and wherein the one or more metals comprises magnesium, calcium, or a combination thereof,
wherein the carbon-containing material are doped with the nitrogen, and
wherein the one or more metals is embedded in a matrix of the carbon-containing material.
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