Synthesis Of Ferrous Oxalate And Glyphosate Ferrous And Their Degradation On Organic Matter

The shortage of available water resources has been further polluted with the rapid development of industrialization,thus causing major harm to the ecological environment and human health.Therefore,exploring the effective degradation of sewage has become an urgent problem to be solved.Fenton oxidation technology is one of the most popular advanced oxidation technology.Although Fenton oxidation technology has some advantages of simple operation and mild reaction conditions.However,the reaction also has many drawbacks such as low utilization of H2O2,a small pH range,and the catalyst cannot be recycled.Heterogeneous Fenton oxidation technology is a more effective oxidative degradation technology.And it solves various shortcomings in traditional Fenton oxidation technology.In this work,?-ferrous oxalate nanoparticles with 60 nm average diameter were prepared in limited spaces formed by glucose in water solution.Then rhodamine B(RhB)was oxidized by synthesized a-ferrous oxalate nanoparticles.Compared to the a-ferrous oxalate with micrometer scale obtained by conventional chemical precipitation method,the?-ferrous oxalate nanoparticles had higher catalytic activities on degradation of RhB,while less amount of H2O2 and ?-ferrous oxalate assumed.RhB with an initial concentration of 200 mg/L in water solution was found to be degradated almost completely at pH 7.0 and COD(chemical oxygen demand)value of the solution was decreased from 240.00 mg/L to 78.74 mg/L under existence of the nanoparticles.However,the COD value of RhB solution was decreased from 240.00 mg/L to 95.78 mg/L and 139.58 mg/L when ?-ferrous oxalate with 2.0?m and 10.0 ?m average size were used as catalyst in the reaction under the same conditions.The catalytic degradation efficiency of nano-?-ferrous oxalate is much higher than micron ?-ferrous oxalate,which reflects the nano-effect of the catalyst.In this paper,coking wastewater was degraded by ?-ferrous oxalate with particle size of 2.0 um.After a series of experimental studies,it was found that the catalytic degradation of coking wastewater by ultraviolet light-assisted ?-ferrous oxalate is better than the simple degradation of?-ferrous oxalate.The COD of the degraded coking wastewater solution was reduced to 80.64 mg/L,which was lower than the sewage discharge standard.In this paper,a new metallorganic compound glyphosate ferrous with particle size about 150 nm was synthesized.Research results indicate that the compound has good catalytic properties on degradation of methyl orange(MO).There is about 99.48%of MO was degraded in 10 min when content of glyphosate ferrous in the reactive system was 0.2 g/L,the reaction temperature was at 70?,pH value of MO solution was about 3.0 and 1.2 mL of H2O2 was consumed in one liter reaction solution.Also it was found that the catalyst had good structural stability and high recyclability.Degradation ratio of MO was still about 99.45%after the catalyst was used 6 times under the reaction conditions.The catalyst shows good application prospects in dye wastewater treatment for its synthesis method and raw materials are simple and cheap enough.