CAJ | 학술논문

再生水灌溉是解决水资源短缺的潜在途径之一，关于再生水灌溉条件下土壤中重金属的迁移行为及其对表层土壤的污染风险至今仍缺乏研究。为此，进行了对不同水体浇灌蔬菜的试验研究。相比较污水浇灌和自来水浇灌，再生水灌溉不仅对土壤没有污染，还极大地节约了水资源成本，并为蔬菜提供了大量的生长元素。研究结果表明，再生水浇灌蔬菜长势优于自来水和污水浇灌蔬菜，且浇灌60 d后，再生水中的Cr、Cd、As、Hg、Pb、Ni、Zn和Cu在土壤中虽有一定的富集，但随着淋溶时间的延长，各种重金属质量分数保持不变；再生水浇灌的土壤在重金属垂直迁移上的质量分数变化也不大，基本呈水平趋势；与土壤环境质量标准（GB15618-1995）相比，再生水浇灌后的土壤重金属没有额外超标，优于蔬菜种植的土壤标准要求。风险综合评价等级为可承受（一级）风险。
재생수관개시해결수자원단결적잠재도경지일，관우재생수관개조건하토양중중금속적천이행위급기대표층토양적오염풍험지금잉결핍연구。위차，진행료대불동수체요관소채적시험연구。상비교오수요관화자래수요관，재생수관개불부대토양몰유오염，환겁대지절약료수자원성본，병위소채제공료대량적생장원소。연구결과표명，재생수요관소채장세우우자래수화오수요관소채，차요관60 d후，재생수중적Cr、Cd、As、Hg、Pb、Ni、Zn화Cu재토양중수유일정적부집，단수착림용시간적연장，각충중금속질량분수보지불변；재생수요관적토양재중금속수직천이상적질량분수변화야불대，기본정수평추세；여토양배경질량표준（GB15618-1995）상비，재생수요관후적토양중금속몰유액외초표，우우소채충식적토양표준요구。풍험종합평개등급위가승수（일급）풍험。
Reclaimed water irrigation is a potential alternate source of water to help meet water shortages. There are few studies focus on the migration of heavy metals in soil and the topsoil contamination when reclaimed water is used for irrigation. The irrigation on vegetables using reclaimed water from different sources was studied. Reclaimed water irrigation didn’t cause soil contamination and conserved fresh water resources comparing with sewage irrigation and tap water irrigation, at the meanwhile, it also could provide large amounts of nutrients for vegetables. The growth of vegetable irrigated by reclaimed water was better than those using tap water or sewage. The heavy metal accumulation in soil was observed after 60 days including Cr, Cd, As, Hg, Pb, Ni, Zn and Cu, which was low in concentration and stayed stable within irrigation duration. The vertical distribution of heavy metals in soil also changed little, with trends staying intact. The heavy metal content in soil was lower than the value in the soil environment quality standard (GB15618-1995), and better than the soil quality standard of vegetable planting. Risk assessment is within the generally acceptable risk range (a).