Evaluation of Antibiotic Pollution in Soil of Vegetable Base in Yangling District,Shaanxi Province

[Objectives]To evaluate the pollution status of antibiotics in the soil of vegetable bases in Yangling District.[Methods]The contents of 19 antibiotics in 4 categories of quinolones,tetracyclines,sulfonamides and macrolides in soil samples from 20 bases were detected and analyzed using HPLC-MS/MS.[Results]The quinolones,sulfonamides and tetracyclines were all detected in 100%of soil samples,and the detection rate of macrolides was 62%.The average contents of the four antibiotics from high to low were quinolones(51.76μg/kg)>tetracyclines(12.77μg/kg)>sulfonamides(1.14μg/kg)>macrolides(0.28μg/kg),and norfloxacin,oxytetracycline,sulfamethazine and erythromycin were the main contents,respectively.According to the trigger value of ecological toxic effect of antibiotics in soil(100μg/kg)proposed by the Steering Committee of the International Coordinating Committee for Veterinary Medicine(VICH),the contents of the four classes of antibiotics in the soil of the study area were all lower than the trigger value,indicating a small ecological risk.[Conclusions]Compared with other domestic research reports,the vegetable bases in this study area are also at a relatively low level of antibiotic pollution.

Study on Phthalate Esters Pollution in the Soil of Facility Vegetable Base in Yangling District of Xianyang City

[Objectives]To evaluate the pollution status of phthalate esters(PAEs)in the soil of facility vegetable base in Yangling District of Xianyang City.[Methods]A total of 15 kinds of PAEs in soil samples were detected and analyzed by gas chromatography-mass spectrometry.[Results]A total of 12 kinds of PAEs were detected in analyzed soil samples,with a total content of 53.4-3524.1μg/kg and an average of 602.7μg/kg.Specifically,DEHP,DBP,DIBP,DMEP,BBP and DNOP were the main PAEs pollutants in the soil,with the detection rates of 100%,100%,100%,73.3%,63.3%and 53.3%,and the average content were 286.3,167.3,123.1,157.6,121.3,and 130.5μg/kg,respectively.[Conclusions]Compared with the soil in other regions,the pollution level of PAEs in the soil of facility vegetable base in Yangling District is lower,but such compounds are widespread in the facility vegetable base,and their potential environmental risks should attract close attention.