Wet flue gas desulfurization is now a widely used method for SO 2 abatement, but an efficient adsorbent with low cost is recognized as being an important prerequisite for its industrial application. Herein, wet flue gas phosphate rock desulfurization technology is reported to eliminate SO 2 from phosphorus chemical processes, and the technology has been employed in industrial application successfully. Because phosphate rock was chosen as the raw material from the phosphorus chemical process, its application can reduce the desulfurization cost. In addition, the produced sulfuric acid in the present desulfurization system can provide replacement of sulfuric acid required in typical phosphorus chemical activity. Accordingly, this desulfurization technology is of environmental and economic importance and also exhibits potential in treating other industrial SO 2 pollution processes. Characterizations of the fresh and spent phosphate rock samples as well as analysis of the spent solution were conducted. Subsequently, the reaction processes, the desulfurization mechanism, and the deactivation of the phosphate rock adsorbent were proposed.

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Removing SO2 and NOx released from middle and small‐scaled coal‐burning boiler is one important strategy for air pollution control. Herein, we first report a novel process on simultaneous eliminating SO2 and NOx at low temperature, by employing large scale and cheap sources of phosphorus sludge and phosphate rock slurry. The results showed that 100% desulfurization and denitrification efficiency can be obtained, and there exhibited a significant mutual‐promoting effect between SO2 and NOx abatement processes. Based on characterizations and theoretical calculation results, it was found that the active substances produced by the interaction of sulfur and nitrogen species played a significant role in promoting the removal of SO2 and NOx. Compared with traditional purification technology, this process can achieve simultaneous desulfurization and denitrification with no discharge of secondary pollutants, and can be regarded as a new and economic technology for efficient removal of SO2 and NOx in industrial scale.