不同洗涤蜂窝煤灰渣对铅冶炼污染石灰性土壤的修复研究  

Remediation of a Lead Smelting Polluted Alkaline Soil with Washed Honeycomb Briquette Combustion Residue

作　　者：历琳[1] 邢维芹[1] 向国强[1] 王亚利[1] 吴洪敏[1] 王静[1] 李立平[1] 

机构地区：[1]河南工业大学化学化工学院,郑州450001

出　　处：《农业环境科学学报》2012年第12期2345-2351,共7页Journal of Agro-Environment Science

基　　金：河南省教育厅自然科学研究计划项目(2011A610006)

摘　　要：为了探讨不同洗涤蜂窝煤灰渣对铅冶炼污染石灰性土壤中铅和镉的稳定效果,在铅冶炼污染石灰性土壤(Pb和Cd含量分别为2337、21.4mg·kg-1)上分别施1%、2%和4%用量的原灰渣、水洗灰渣或酸洗灰渣,培养60d后,测定土壤DTPA-Cd、DTPA-Pb、pH、电导率(EC)和Olsen-P。结果表明:对于原灰渣,土壤镉有效性随灰渣用量的增加而降低,在4%的用量下,土壤DTPA-Cd含量与对照相比下降13.1%(P<0.05);同时除4%的用量外,土壤DTPA-Pb含量与对照相比也均有所下降。对于水洗灰渣,土壤DTPA-Cd和DTPA-Pb含量均随灰渣用量的增加而降低,3种用量下土壤DTPA-Pb含量与对照相比分别下降7.7%、9.4%和10.4%(P<0.05),但其对镉有效性的影响不显著(P>0.05)。对于酸洗灰渣,土壤DTPA-Cd含量随用量的增加而升高,4%的用量时,DTPA-Cd含量与对照差异显著(P<0.05);而土壤DTPA-Pb含量随用量的增加先降低后升高,当用量为2%时,土壤DTPA-Pb含量与对照相比显著下降(P<0.05)。3种灰渣均未对土壤Olsen-P含量产生显著影响(P>0.05)。除施用原灰渣可显著提高土壤pH(P<0.05)外,其余两种处理灰渣未对土壤pH产生显著影响(P>0.05)。原灰渣在2%和4%、水洗灰渣在4%用量时,均能显著提高土壤EC(P<0.05)。以上结果说明,水洗蜂窝煤灰渣可用于铅冶炼污染石灰性土壤的修复。Honeycomb briquette combustion residue（HBCR） is the solid combustion waste of honeycomb briquette,which is widely used for cooking in rural China.Investigations have confirmed that the HBCR can be used to immobilize lead（Pb） in soil spiked with soluble Pb.The purpose of this study was to evaluate the immobilization of Pb and Cd in alkaline lead smelting polluted soils with different HBCR.A polluted soil with 2337 mg·kg-1 Pb and 21.4 mg·kg-1 Cd was amended with un-washed HBCR,water-washed HBCR or dilute hydrochloric acid-washed HBCR at the rates of 1%,2% or 4%,respectively.The soil was then incubated for 60 days before being analyzed for DTPA-Cd,DT-PA-Pb,pH,electrical conductivity（EC） and Olsen-P.The results showed that,for the un-washed HBCR amended soil,increasing the rates of HBCR lead to the decreasing of Cd availability,and the DTPA-Cd contents was 13.1% lower than the control（P0.05） at the rate of 4%,while the DTPA-Pb contents were lower than the control except at the rate of 4%.For the water-washed HBCR amended soil,increasing the rates of HBCR lead to the decreasing of both DTPA-Pb and DTPA-Cd contents,and the contents of DTPA-Pb were 7.7%,9.4% and 10.4% lower than the control at the rates of 1%,2% and 4%,respectively（P0.05）.However,no statistically significant effect was observed on DT-PA-Cd contents（P0.05）.For the acid-washed HBCR amended soil,increasing the rates of HBCR lead to the increasing of Cd availability,and the effect was significant at the rate of 4%（P0.05）.While significantly lower DTPA-Pb content than the control was obtained at 2% rate（P0.05）,decreasing or increasing of the rate lead to higher DTPA-Pb contents.All the HBCR amendments effect on Olsen-P contents and the pH of the soil were not obvious（P0.05）,except that the un-washed HBCR increased the pH of the soi（l P0.05）.The EC of soil amend-ed with un-washed HBCR at the rates of 2% or 4%,and water-washed HBCR at rate of 4% were significantly higher than the control（P 0.05）.The results suggest

关 键 词：蜂窝煤灰渣 洗涤 水 盐酸 铅冶炼 石灰性土壤 修复 

分 类 号：X53[环境科学与工程—环境工程]