灌溉模式对土壤中DOC及DBPs前驱物形成的影响

目的]为水源水的保护和水的氯化处理提供参考。方法]对2种不同灌溉模式的土壤进行萃取,用萃取液进行加氯反应并测定反应生成的消毒副产物的浓度。结果]Soil连续的DOC浓度和需氯量分别为59.8和45.5 mg/L,Soil定期的DOC浓度和需氯量分别为7.5和11.9 mg/L。Soil连续和Soil定期土壤萃取液的电导率分别为2.71和1.22 dS/m。Soil连续的THMs生成量比Soil定期的THMs生成量高71.4%。Soil连续和Soil定期的CHC l3比例分别为83.1%和67.8%,Soil连续中3种THMs的浓度较高。Soil连续和Soil定期的HAAs生成量分别为1 393.8和480.7μg/L,Soil连续中检出卤乙酸的浓度高于Soil定期。THMs和HAAs生成量与DOC浓度呈正相关。Soil连续和Soil定期的Br浓度分别为0.36和0.32μg/L,Br/DOC值分别为0.006和0.043μg/mg,Soil连续的DBPs浓度高于Soil定期的DBPs浓度。结论]灌溉模式对土壤DOC浓度及THMs与HAAs的生成具有显著影响。

Influence of Irrigation Pattern on DOC and Formation of DBPs Precursors in Soil

Objective] The research aimed to supply references for protecting source water and chlorination treatment of water.Method] The soil irrigated with 2 different modes were extracted,then the extract liquid was chlorinated and the concn.of disinfection by-products generated in the reaction was determined.Result] The DOC concn.and chlorine demand of Soilcontinuous were 59.8 and 45.5 mg/L resp.and that of Soilperiodical were 7.5 and 11.9 mg/L resp.The conductivities of extract liquid from Soilcontinuous and S...