亚硫酸钠和腐植酸对李氏禾生长和铬积累的影响  

Effect of sodium sulfite and humic acid on growth and Cr accumulation of Leersia hexandra Swartz

作　　者：程志刚[1,2] 张学洪[1,2] 张杏锋[1,2] 刘杰[1,2] 

机构地区：[1]桂林理工大学广西矿冶与环境科学实验中心,桂林541004 [2]桂林理工大学环境科学与工程学院广西环境污染控制理论与技术重点实验室,桂林541004

出　　处：《环境工程学报》2015年第12期5788-5794,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(41273142);广西"八桂学者"建设工程专项;广西自然科学基金项目(2013GXNSFBA019026);广西危险废物处置产业化人才小高地

摘　　要：通过水培实验,研究了不同水平亚硫酸钠、腐植酸对李氏禾植株生长、铬吸收积累和营养液中铬含量的影响。亚硫酸钠和腐植酸能明显提高李氏禾对铬的吸收和富集能力。与对照相比,50 mg/L亚硫酸钠处理能显著提高李氏禾根、茎、叶中铬含量和积累量;10 mg/L腐植酸处理能显著提高李氏禾根、茎、叶中铬含量和积累量。亚硫酸钠和腐植酸能明显提高转运系数,促进铬从李氏禾根向地上部分的转移。50 mg/L亚硫酸钠和5 mg/L腐植酸处理下,转运系数大于1,地上部铬含量显著高于根中铬含量。亚硫酸钠显著提高营养液中Eh值,对p H值的影响不明显,李氏禾对铬的吸收以Cr(III)为主。A hydroponic experiment was conducted to study the effect of sodium sulfite and humic acid on the growth and Cr accumulation of Leersia hexandra Swartz,as well as the Cr concnetration in the nutrient solution. Sodium sulfite and humic acid could improve the Cr accumulation ability of L. hexandra. Compared to the control,the treatments of 50 mg/L sodium sulfite and 10 mg/L humic acid significantly improved the Cr extraction amounts and accumulation in the root,stem and leaf of L. hexandra. Sodium sulfite and humic acid could obviously increase the translocation factor,and promote the translocation of Cr from plant root to shoot. The translocation factor of L. hexandra in the treatments of 50 mg/L sodium sulfite and 5 mg/L humic acid were greater than 1,and the concentration of Cr in plant shoot was higher than root. Sodium sulfite significantly increased the Eh value,while had no influence on the pH value in the nutrient solution. Meanwhile,Cr（ III） was the main asortption form in L. hexandra.

关 键 词：李氏禾 铬 亚硫酸钠 腐植酸 

分 类 号：X173[环境科学与工程—环境科学]