西藏大学学报
西藏大學學報
서장대학학보
Journal of Tibet University
2014年
2期
21~27
,共null页
刘勇 梅朵 吴坚扎西 布多
劉勇 梅朵 吳堅扎西 佈多
류용 매타 오견찰서 포다
拉萨河谷 设施农业 水环境 重金属 污染评价
拉薩河穀 設施農業 水環境 重金屬 汙染評價
랍살하곡 설시농업 수배경 중금속 오염평개
Lhasa River Valley;facility agriculture;water environment;heavy metal;pollution assessment
为了解拉萨河谷设施农业区水环境中重金属污染水平及程度,文章对拉萨河谷设施农业区地下水和地表水中17种重金属（Cd、Be、V、Tl、Hg、Cu、Pb、Co、Ni、Cr、Fe、Sb、Zn、Mn、Ba、Ti和As）含量进行研究,并采用综合污染指数法对地下水和地表水中7种重金属（Cd、Hg、Cu、Pb、Ni、Zn和As）的污染程度进行了评价。结果表明,除A8点位的Zn含量符合《地表水环境质量标准》（GB 3838-2002）Ⅱ类标准外,拉萨河谷设施农业区其余各点位Cd、Pb、Cu、As和Zn含量均符合Ⅰ类水标准。Cr、Hg、As、Cu和Pb与pH存在显著或极显著相关性,说明pH对其有较大影响;不同重金属间有些存在相关性,说明它们之间可能具有一定的同源性。采用水体综合污染评价法表明,拉萨河谷设施农业区A1、A2和A7点位存在轻度污染,B1和B2点位为中度污染,且主要以Hg污染为主。
為瞭解拉薩河穀設施農業區水環境中重金屬汙染水平及程度,文章對拉薩河穀設施農業區地下水和地錶水中17種重金屬（Cd、Be、V、Tl、Hg、Cu、Pb、Co、Ni、Cr、Fe、Sb、Zn、Mn、Ba、Ti和As）含量進行研究,併採用綜閤汙染指數法對地下水和地錶水中7種重金屬（Cd、Hg、Cu、Pb、Ni、Zn和As）的汙染程度進行瞭評價。結果錶明,除A8點位的Zn含量符閤《地錶水環境質量標準》（GB 3838-2002）Ⅱ類標準外,拉薩河穀設施農業區其餘各點位Cd、Pb、Cu、As和Zn含量均符閤Ⅰ類水標準。Cr、Hg、As、Cu和Pb與pH存在顯著或極顯著相關性,說明pH對其有較大影響;不同重金屬間有些存在相關性,說明它們之間可能具有一定的同源性。採用水體綜閤汙染評價法錶明,拉薩河穀設施農業區A1、A2和A7點位存在輕度汙染,B1和B2點位為中度汙染,且主要以Hg汙染為主。
위료해랍살하곡설시농업구수배경중중금속오염수평급정도,문장대랍살하곡설시농업구지하수화지표수중17충중금속（Cd、Be、V、Tl、Hg、Cu、Pb、Co、Ni、Cr、Fe、Sb、Zn、Mn、Ba、Ti화As）함량진행연구,병채용종합오염지수법대지하수화지표수중7충중금속（Cd、Hg、Cu、Pb、Ni、Zn화As）적오염정도진행료평개。결과표명,제A8점위적Zn함량부합《지표수배경질량표준》（GB 3838-2002）Ⅱ류표준외,랍살하곡설시농업구기여각점위Cd、Pb、Cu、As화Zn함량균부합Ⅰ류수표준。Cr、Hg、As、Cu화Pb여pH존재현저혹겁현저상관성,설명pH대기유교대영향;불동중금속간유사존재상관성,설명타문지간가능구유일정적동원성。채용수체종합오염평개법표명,랍살하곡설시농업구A1、A2화A7점위존재경도오염,B1화B2점위위중도오염,차주요이Hg오염위주。
The aim of the current paper is to explore the pollution level and degree of heavy metals in water of fa-cility agriculture region in the Lhasa River Valley. The contents of Cd, Be, V, Tl, Hg, Cu, Pb, Co, Ni, Cr, Fe, Sb,Zn, Mn, Ba, Ti and As in ground water and surface water of the facility agriculture region in the Lhasa River Val-ley were analyzed respectively to explore the pollution level and degree of heavy metals in water of the region.The integrated pollution index were used to evaluate the contamination degree of Cd, Hg, Cu, Pb, Ni, Zn and As.Compared with GB 3838-2002, Cd, Pb, Cu, As and Zn at all the sampling sites fit the standards of category I wa-ter, while Zn content exceed the standards of category I water. The significant results also indicated that the pHcould has large influence on the distribution of Cr, Hg, As, Cu and Pb. Significant positive correlations werefound between some elements, which implied that these elements probably had common pollution sources. Theintegrated pollution index assessment showed that the water quality in the A1, A2 and A7 sampling sites state inlight pollution level while sampling sites B1 and B2 are moderately polluted with heavy metal. Hg was the mainpollution element in water at the facility agriculture region in the Lhasa River Valley.
