再生水滴灌土壤中砷(As)时空分布规律试验研究  

Experimental study on spatial and temporal distribution regularity of arsenic in soil under the drip irrigation with reclaimed water

作　　者：裴亮[1,2] 廖晓勇[2,3] PEI Liang;LIAO Xiaoyong(Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beifing 100101, China;Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 , China)

机构地区：[1]中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室,北京100101 [2]中国科学院地理科学与资源研究所环境损害与污染修复北京市重点实验室,北京100101 [3]中国科学院陆地表层格局与模拟重点实验室,北京100101

出　　处：《水资源与水工程学报》2018年第2期236-239,共4页Journal of Water Resources and Water Engineering

基　　金：国家重点研发计划项目(2017YFD0800900);国家自然科学基金项目(51109197);国家科技支撑计划课题(2012BAD08B02;2013BAC02B02)

摘　　要：为研究再生水中污染物As在土壤中迁移转化规律,以地下水滴灌为对照,对生长季内大棚蔬菜进行再生水滴灌试验研究,分析探讨了再生水滴灌后7天内土壤不同深度中As积累分布和运移情况。结果表明:滴灌后第1天,土壤表层As浓度最大,滴灌后第3天100 cm深度处As浓度最大,表层土壤As浓度略有降低,第5天到第7天,各层土壤As浓度接近,80~120 cm处浓度最大,深度低于120 cm时As浓度随深度增加而略降低。生长季内及生长季后土壤As随着灌水次数增加而变化,具体情况为,表层土壤As蓄积增加,土壤深度80~120 cm处As增加较少,200 cm处As浓度减小。因此,适当浓度再生水滴灌情况下,土壤深层As浓度符合《土壤环境质量标准》的标准限值,适当浓度的再生水滴灌不会造成As污染。To study the migration and transformation of pollutants As in soil, reclaimed water drip irriga- tion experiments were conducted during the growth of greenhouse vegetables, using underground water ir- rigation as the contrast treatment. The distribution and migration of As accumulation in different depths of soil in 7 days after drip irrigation were analyzed. The results showed that： on the first day after drip irri- gation, the As concentration in the soil surface was the highest, and the As concentration at the depth of 100 cm was the highest on the third day after drip irrigation. The As concentration in the surface soils slightly decreased. From the fifth day to the seventh day, the concentration of As at the depth of 80 - 120 cm is the highest, while the As concentration decreases slightly with the depth of the As at the depth of less than 120 cm. With the increase of irrigation frequency, the accumulation of As in surface soil in- creased during the growing period and after the growing period, but the amount of 80 - 120 cm soil in- creased less and the concentration of 200 cm decreased. The proper concentration of reclaimed water drip irrigation condition, soil deep layer As concentration in line with soil environmental quality standard lim- its, the proper concentration of reclaimed wastewater irrigation will not cause pollution of As.

关 键 词：再生水滴灌 砷 时空分布规律 土壤 蔬菜生长季 

分 类 号：X131.3[环境科学与工程—环境科学] X53