Activated　carbon　derived　from　sewage　sludge　was　impregnated　in　nitrate　solution　to　produce　a　sorbent　for　sulfur　dioxide　adsorption　at　low　concentration.　The　sulfur　dioxide　capacity　was　measured　according　to　a　laboratory-designed　breakthrough　test.　After　adsorption　experiments　on　sulfur　dioxide,　desulfurizer　JZ-Ni　was　chosen　as　the　optimal　sorbent　owing　to　its　largest　sulfur　dioxide　capacity　57.6　mg.g(-1)　and　the　highest　BET　210.3031　m(2).g(-1).　The　effects　of　a　few　conditions　on　SO2　removal　behavior　of　the　sorbent　were　studied.　The　results　show　that　the　sorbent　JZ-Ni　under　the　best　conditions　of　5714　mg.m(-3)　inlet　SO2　concentration,　2000h(-1)　space　velocity　and　393　K　desulfurization　temperature,　0.3　mm　particle　diameter　in　steam　has　the　maximum　breakthrough　sulfur　dioxide　capacity　58.2　mg.g(-1)