秸秆-复合菌-污泥联合修复铬污染土壤技术
Straw-compound bacteria-sludge united remediation technology in chromium contamination soil
-
摘要: 为探索修复Cr（Ⅵ）污染土壤的新方法，以模拟某化工厂铬渣堆存场内Cr（Ⅵ）污染土壤为研究对象，分别研究了秸秆-复合菌-污泥修复铬污染土壤单因素和3因素条件下对铬污染土壤的修复效果。结果表明：单独添加3%的秸秆时，土壤中Cr（Ⅵ）还原率可以达到25.88%；单独添加3%复合菌时，土壤中Cr（Ⅵ）还原率可以达到72.07%；单独添加50%的活性污泥时，土壤中Cr（Ⅵ）还原率可以达85.65%。3个因素中复合菌对土壤中Cr（Ⅵ）还原率的影响最大。综合考虑秸秆、污泥和复合菌3个因素对土壤中Cr（Ⅵ）还原的影响，设计了秸秆、污泥和复合菌的3因素联合实验，最后从修复的经济成本和修复效率考虑，确定最优物料组合为1%秸秆+1%复合菌+30%污泥，对土壤中Cr（Ⅵ）还原率可以达到96.6%。秸秆-复合菌-污泥对铬污染土壤的修复明显高于单独对铬污染土壤修复的效率。该技术在实现对铬污染土壤进行修复的同时，为秸秆和活性污泥的资源化利用开辟了新的途径，实现了"以废制废"。Abstract: To explore a new method of remediation technology on chromium contamination soil, the simulate chromium contamination soil of a chemical plant was studied. The remediation effect of chromium contamination soil was studied respectively by straw, compound bacteria and sludge remediation technology and straw-compound bacteria-sludge united remediation technology. The research results showed that the percent reduction of chromium contamination soil could reach 25.88% when 3% straw was added, the percent reduction of chromium contamination soil could reach 72.07% when 3% compound bacteria was added and the percent reduction of chromium contamination soil could reach 85.65% when 50% sludge was added. The compound bacteria was the largest influence factor in the three factors. Considering the reduction of chromium contamination soil about three factors of straw, compound bacteria and sludge, then the straw-compound bacteria-sludge united remediation technology in chromium contamination soil was designed. Considering the economic costs and the remediation efficiency, the optimal combination was 1% straw+1% compound bacteria+30% sludge, then the percent reduction of chromium contamination soil could reach 96.6%. The remediation effect by the straw-compound bacteria-sludge was obviously higher than the single factor. The technology could remediate the chromium contamination soil, meanwhile the straw and sludge was used in a new way. So the straw-compound bacteria-sludge united remediation technology could use waste control waste on chromium contamination soil.
-
Key words:
- chromium contamination /
- soil remediation /
- straw /
- compound bacteria /
- sludge
-
-
[1] PETRILLI F L, DE F S. Toxicity and mutagenicity of hexavalent chromium on Salmonella typhimurium.[J]. Applied and Environmental Microbiology, 1977, 33(4):805-809 [2] GIBB H J, LEE P S, PINSKY P F. Lung cancer among workers in chromium chemical production[J].American Journal of Industrial Medicine, 2000, 38(2):115-126 [3] KANTAR C, CETIN Z, DEMIRAY H. In situ stabilization of chromium(Ⅵ) in polluted soils using organic ligands:The role of galacturonic, glucuronic and alginic acids[J]. Journal of Hazardous Materials, 2008, 159(2):287-293 [4] KARATHANASIS A D, JOHNSON D M. Subsurface transport of Cd, Cr, and Mo mediated by biosolid colloids[J]. Science of the Total Environment, 2006, 354(2/3):157-169 [5] STEPNIEWSKA Z, BUCIOR K, BENNICELLI R P. The effects of MnO2, on sorption and oxidation of Cr(Ⅲ) by soils[J]. Geoderma, 2004, 122(2/3/4):291-296 [6] RAI D, SASS B M, MOORE D A. ChemInform abstract:Chromium(Ⅲ) hydrolysis constants and solubility of Chromium(Ⅲ) hydroxide.[J]. Inorganic Chemistry, 1987, 26(3):345-349 [7] 黄莹,徐民民,李书鹏,等.还原稳定法修复六价铬污染土壤中试研究[J].环境工程学报,2015, 9(2):951-958 [8] 王旌,罗启仕,张长波,等.铬污染土壤的稳定化处理及其长期稳定性研究[J].环境科学,2013,34(10):4036-4041 [9] 梁金利,蔡焕兴,段雪梅,等.还原法修复六价铬污染土壤的研究[J].环境科学与管理,2013, 38(3):80-83 [10] GARDEATORRESDEY J L, PERALTAVIDEA J R, MONTES M, et al. Bioaccumulation of cadmium, chromium and copper by Convolvulus arvensis L.:Impact on plant growth and uptake of nutritional elements.[J]. Bioresource Technology, 2004, 92(3):229-235 [11] 李东,黄彦,聂杨,等.高浓度铬污染土壤水浸泡与电动修复联合处理实验[J]. 环境工程学报,2010, 4(11):2579-2584 [12] 路平,冯启言,李向东,等.交换电极法强化电动修复铬污染土壤[J]. 环境工程学报,2009, 3(2):354-358 [13] LOSI M E, AMRHEIN C,WILLIAM T FRANKENBERGER. Factors affecting chemical and biological reduction of hexavalent chromium in soil[J]. Environmental Toxicology & Chemistry, 1994, 13(11):1727-1735 [14] LOVLEY D R, COATES J D. Bioremediation of metal contamination[J]. Current Opinion in Biotechnology, 1997, 8(3):285-289 [15] LOVLEY D R. Dissimilatory metal reduction[J]. Annual Review of Microbiology, 1993, 47(1):263-290 -
点击查看大图
计量
- 文章访问数: 1452
- HTML全文浏览数: 985
- PDF下载数: 497
- 施引文献: 0
下载:
