不同钝化材料对铜污染土壤修复的影响  

Effects of different passivation materials on the remediation of copper-contaminated soil

作　　者：刘娜 薛中俊 叶文玲[1] 胡宏祥[1] 徐年 符小菲 LIU Na;XUE Zhong-jun;YE Wen-ling;HU Hong-xiang;XU Nian;FU Xiao-fei(Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention,School of Resources and Environment,Anhui Agricultural University,Hefei230036,China)

机构地区：[1]农田生态保育与污染防控安徽省重点实验室,安徽农业大学资源与环境学院,合肥230036

出　　处：《农业环境科学学报》2018年第12期2694-2700,共7页Journal of Agro-Environment Science

基　　金：国家重点研发计划项目(2016YFD0801105).

摘　　要：为比较不同钝化材料对铜(Cu)污染土壤原位钝化修复的影响,采用田间试验方法,研究了钙基(磷灰石、石灰)、有机(生物腐植酸菌剂、生物有机肥)和硅基(新型多孔陶瓷纳米材料)等钝化材料对Cu污染土壤理化性质、土壤有效Cu含量、油菜生长及其不同部位吸收Cu的影响。结果表明,与常规施肥对照相比,钙基材料和硅基材料显著提高了土壤pH,有机材料较其他两种材料整体提高土壤养分(速效磷除外)效果明显;不同钝化材料均显著降低土壤有效Cu含量(比对照降低28.65%～36.66%),有效抑制油菜籽粒对Cu的吸收(33.84%～46.03%),其中钙基材料处理下二者降低幅度最大,分别为36.66%和46.03%;两种钙基材料处理较对照的油菜增产7.43%,有机材料和硅基材料表现减产。根据试验结果,钙基材料(尤其是石灰)通过显著提高土壤pH,降低酸性土壤Cu生物有效性,可能在安全生产的基础上有效提高油菜籽产量。In order to compare the effects of different passivation materials on the remediation of copper-contaminated soil,a field experiment was conducted to investigate the effects of calcium-based passivation materials(apatite,lime),organic passivation materials(biological humic acid agent,bioorganic fertilizer),and silicon-based passivation material(new porous ceramic nanomaterial)on the physicochemical properties of copper-contaminated soil,the available copper concentration of copper-contaminated soil,rape growth,and copper uptake by rape.The results showed that the soil pH significantly increased with the application of calcium-based and silicon-based passivation materials compared with conventional fertilization(the control).Organic materials were more effective than the other two materials in increasing the soil nutrient contents(except for soil available phosphorus).In addition,soil available copper content significantly decreased with the application of different passivation materials(28.65%~36.66%lower than the control),and copper accumulation in rape seeds was effectively inhibited(33.84%~46.03%lower than the control).With the application of calcium-based material,available copper content and copper accumulation showed the largest reductions of36.66%and46.03%,respectively.With the application of calcium-based materials,the rape yield increased by7.43%compared to that of the control,but the rape yield decreased with the application of organic materials and silicon-based material.These results indicate that application of calcium-based materials(especially lime)may improve rape yield by significantly increasing soil pH and reducing copper bioavailability in acid soil.

关 键 词：土壤铜 钝化材料 油菜(Brassica apus L.) 钝化修复 

分 类 号：X53[环境科学与工程—环境工程]