Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第19卷    第12期    总第129期    2009年12月

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文章编号:1004-0609(2009)12-2230-07
Pannonibacter phragmitetus对Cr(Ⅵ)污染土壤的修复效应
柴立元1, 2 ,许友泽 1, 2,王海鹰1 ,向仁军1, 2,杨志辉1,苏长青1,王  兵1

(1. 中南大学 冶金科学与工程学院,长沙 410083;
2. 中南大学 水污染控制技术湖南省重点实验室,长沙 410004
)

摘 要: 在前期从铬渣污染土壤中分离筛选出高效还原Cr(Ⅵ)的土著微生物(Pannonibacter phragmitetus)的基   础上,通过单因素实验对所筛选的土著微生物修复模拟铬污染土壤效应及其影响因素进行研究。结果表明:   土著微生物对土壤中Cr(Ⅵ)的修复受pH值、微生物接种量和初始Cr(Ⅵ)浓度的影响;pH值越高、微生物接种量越大而初始Cr(Ⅵ)浓度越低时,Cr(Ⅵ)的修复速率越快;所筛选的土著微生物在316 h内就能够完全还原污染土壤中浓度为360 mg/kg的Cr(Ⅵ);Cr(Ⅵ)的修复是土著微生物(Pannonibacter phragmitetus)通过酶促反应对Cr(Ⅵ)的直接还原所致。

 

关键字: 铬(Ⅵ)污染土壤;铬(Ⅵ)污染修复;Pannonibacter phragmitetus

Cr(Ⅵ) remediation by Pannonibacter phragmitetus in
contaminated soils
CHAI Li-yuan1, 2, XU You-ze1, 2, WANG Hai-ying1, XIANG Ren-jun1, 2, YANG Zhi-hui1, SU Chang-qing1, WANG Bing1

1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Hunan Key Laboratory of Water Pollution Control Technology, Central South University, Changsha 410004, China

Abstract:Based on the isolation and screening of chromium-reduction bacterium (Pannonibacter phragmitetus) in the previous research, this strain was used to remediate Cr(Ⅵ) in the contaminated soils. The Cr(Ⅵ) reduction effectiveness by Pannonibacter phragmitetus and its factors were investigated using single factor experiment. The results show that the Cr(Ⅵ) remediation is affected by pH value, inoculation amount of Pannonibacter phragmitetus and initial Cr(Ⅵ) concentration. The remediation rate increases with increasing pH value and inoculation amount of mircrobes, and increases with decreasing initial Cr(Ⅵ) concentration. Pannonibacter phragmitetus can completely reduce 360 mg/kg of Cr(Ⅵ) in the contaminated soil within 316 h. Cr(Ⅵ) remediation in soils is attributed to the direct reduction of Cr(Ⅵ) via enzymatic reaction of Pannonibacter phragmitetus.

 

Key words: Cr(Ⅵ)-contaminated soil; Cr(Ⅵ) remediation; Pannonibacter phragmitet

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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