摘要
为探讨不同腐殖质组分团聚体对苯酚富集能力的影响,应用国际腐殖酸协会(IHSS)推荐方法提取腐殖质,以Ca^(2+)、Al3+、Fe3+为桥键离子,制备了高岭石、蒙脱石不同腐殖质组分团聚体,采用平衡吸附法研究了不同腐殖质组分团聚体对苯酚的富集特征.结果表明:高岭石不同腐殖质组分团聚体对苯酚的饱和吸附量(Qm)大小依次为FA(富里酸)团聚体[(254. 11±5. 35)mg/kg]>HA(胡敏酸)团聚体[(186. 14±1. 61) mg/kg]>HM(胡敏素)团聚体[(120. 61±1. 67) mg/kg];蒙脱石不同腐殖质组分团聚体对苯酚的饱和吸附量大小依次为FA团聚体[(418. 72±19. 14)mg/kg)]>HA团聚体[(290. 00±13. 06)mg/kg)]>HM团聚体[(160. 46±4. 92) mg/kg)];高岭石不同腐殖质组分团聚体对苯酚的富集系数(ER)大小依次为FA团聚体(2. 03±0. 07)>HA团聚体(1. 91±0. 04)>HM团聚体(1. 85±0. 04);蒙脱石不同腐殖质组分团聚体对苯酚的富集系数大小依次为FA团聚体(2. 50±0. 10)>HA团聚体(2. 45±0. 11)>HM团聚体(1. 36±0. 04).研究显示,FA团聚体对苯酚的饱和吸附量和富集系数较大,对苯酚的吸附(富集)作用较强,HM团聚体对苯酚的饱和吸附量和富集系数较小,对苯酚的吸附(富集)作用较弱.不同腐殖质组分团聚体对苯酚的富集能力大小表现为FA团聚体>HA团聚体>HM团聚体.因此,FA团聚体可作为控制受苯酚污染场地土壤的首选修复剂.
To explore the effects of aggregates with different humus fractions on phenol enrichment capacity aggregates of kaolinite and montmorillonite with different humus compositions were prepared using the method recommended by the International Humic Substances Society(IHSS).The enrichment characteristics of phenol by aggregates with different humus fractions were investigated using batch equilibrium adsorption experiments.The results indicated that the order of sorption capacity(Q m)on kaolinite aggregates with different humus fractions was fulvic acid aggregates((254.11±5.35)mg kg)>humic acid aggregates((186.14±1.61)mg kg)>humin aggregates((120.61±1.67)mg kg);and the order of Q m for montmorillonite aggregates with different humus fractions was fulvic acid aggregates((418.72±19.14)mg kg)>humic acid aggregates((290.00±13.06)mg kg)>humin aggregates((160.46±4.92)mg kg).The order of enrichment ratio(ER)for kaolinite aggregates with different humus fractions was fulvic acid aggregates(2.03±0.07)>humic acid aggregates(1.91±0.04)>humin aggregates(1.85±0.04).And the order of ER for montmorillonite aggregates with different humus fractions was fulvic acid aggregates(2.50±0.10)>humic acid aggregates(2.45±0.11)>humin aggregates(1.36±0.04).In summary,the order of enrichment capacity was fulvic acid aggregates>humic acid aggregates>humin aggregates.This study could provide a basis for soil restoration of phenol contaminated site by humus.
作者
王嗣淇
张伟强
邱素芬
WANG Siqi;ZHANG Weiqiang;QIU Sufen(College of Environment and Chemical Engineering,Shenyang Ligong University,Shenyang 110159,China;College of Environmental Science and Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2018年第11期1940-1948,共9页
Research of Environmental Sciences
基金
沈阳理工大学引进高层次人才科研支撑计划项目(No.50010102)~~
关键词
富里酸
胡敏酸
胡敏素
团聚体
苯酚
饱和吸附量
富集系数
fulvic acids
humic acids
humin
aggregates
phenol
sorption capacity
enrichment ratio
