摘要
以4株溶磷细菌和5种磷矿粉为材料,对细菌溶磷作用与磷矿粉伴生性重金属元素释放间的关系进行了研究。结果表明,溶磷细菌在促进磷矿粉中磷溶出的同时,还促进了磷矿粉中伴生性重金属的释放,在测定的6种伴生性金属元素（Zn、Pb、Cu、Co、Ni、Cd）中,Zn最容易随细菌溶磷作用而释放,最多可占该磷矿粉中总Zn量的97.0%,Pb和Cd随细菌溶磷释放率皆低于10%;细菌溶磷作用强度与磷矿粉中各伴生性重金属释放量间的关系因磷矿粉产地和伴生性重金属种类而异。细菌作用于湖南石门磷矿粉和四川马边磷矿粉的溶磷量与Zn、Cu、Co、Ni释放量间（四川马边磷矿粉中Co除外）正相关,但未达到显著水平（r=0.50~0.95,P〉0.05）,但在溶解贵州开阳磷矿粉时,Zn、Co、Ni的释放量都与溶磷量显著正相关（r〉0.88,P〈0.05）。
The relationship between the dissolving phosphorus（P） and the releasing heavy metals from phosphate rock powder by phosphate solubilizing bacteria（PSB） was studied in this paper.The results showed that the associated heavy metals in phosphate rock powder could leach out with the P-solubilizing from phosphate rock powder by PSB.Among the 6 associated heavy metals（Zn,Pb,Cu,Ni,Cd and Co）,Zn was the easiest to release from phosphate rock powder with the P solubilization by PSB,and the maximum amount of dissolved Zn reached 97.0% of the total Zn associated with P in the phosphate rock powder.On the contrary,Pb and Cd showed high stability,and the concentrations of Pb and Cd released from phosphate rock powder were both lower than 10%.The relationship between the phosphate solubilizing capacity and the amount of associated heavy metal released from phosphate rock powder varied with the characteristics of these phosphate rock powder and the kind of heavy metal.The phosphate solubilizing capacity of PSB in Hunan-shimen phosphate rock powder and Sichuang-mabian phosphate rock powder had an insignificantly positive correlation with the amount of Zn,Ni,Co and Cu releasing,respectively（r= 0.50-0.95,P 0.05）.And the phosphate solubilizing capacity of PSB in Guizhou phosphate rock powder had a significantly positive correlation with the amount of Zn,Ni,and Co releasing,respectively（P 0.05）.
出处
《土壤通报》
CAS
CSCD
北大核心
2012年第2期374-378,共5页
Chinese Journal of Soil Science
基金
上海市农委重点攻关项目(无机
有机
生物新型复合肥研制(X9810))
湖南省教育厅高等学校科研项目(重金属钝化剂的筛选及烟草除污专用肥的研制(11C0016))资助
关键词
溶磷细菌
溶磷作用
磷矿粉
伴生性金属元素
释放
Phosphate solubilizing bacteria（PSB）
Phosphorus solubilization
Phosphate rock powder
Associated heavy metal
Releasing
