生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2013年
5期
863-869
,共7页
魏萌%夏天翔%姜林%姚珏君%贾晓洋%刘辉
魏萌%夏天翔%薑林%姚玨君%賈曉洋%劉輝
위맹%하천상%강림%요각군%가효양%류휘
多环芳烃(PAHs)%焦化污染土壤%粒径%比表面积(SA)%总有机碳(TOC)
多環芳烴(PAHs)%焦化汙染土壤%粒徑%比錶麵積(SA)%總有機碳(TOC)
다배방경(PAHs)%초화오염토양%립경%비표면적(SA)%총유궤탄(TOC)
Polycyclic Aromatic Hydrocarbons (PAHs)%coking plant soil%particle size fractions%specific surface area (SA)%total organic carbon (TOC)
为分析典型焦化污染场地不同粒径土壤中PAHs的累积及其与土壤有机碳含量(TOC)、比表面积(SA)等土壤性质的相关性,对北京焦化厂长期受PAHs污染的土壤进行粒度分级[P1(0.5~1.0 mm)、P2(0.25~0.5 mm)、P3(0.15~0.25 mm)、P4(0.106~0.15 mm)、P5(0.075~0.106 mm)、P6(<0.075 mm)],测定了各粒径土壤的理化性质及土壤中USEPA优先控制的16种PAHs的浓度,探究PAHs在不同粒径土壤中的累积特征,并通过PAHs质量分数及土壤部分理化性质的曲线拟合结果分析PAHs的赋存特征。结果表明:各粒径土壤中16种PAHs均有检出,其最高质量分数大多出现在P1粒径土样,最低质量分数出现在 P4、P5中。各粒径土壤中2~3(低)环 PAHs、ΣPAHs16质量分数变化趋势相似,均为 P1>P2>P3、P4、P6>P5(P<0.05),4(中)、5~6(高)环PAHs趋势类似,均为P1、P2>P3>P6>P4、P5(P<0.05)。比表面积(SA)、总有机碳(TOC)、可溶解性有机碳(DOC)与各类PAHs的质量分数呈现一定的相关性,各类PAHs质量分数随SA的增大呈先增大随后减小趋势,最大质量分数所对应的SA为38~41 m2·g-1,随TOC的增加呈先减小随后增大趋势,最小质量分数所对应的TOC为7.0~8.7 g·kg-1。不同粒径土壤颗粒中,基于污染物毒性当量因子(TEF)的等效质量分数与污染物实际质量分数变化趋势并不相同,ΣPAHs16实际质量分数变化趋势为P1>P2、P3、P4、P6>P5(P<0.05),而其等效质量分数则为P1、P2、P3、P4、P6>P5(P<0.05)。
為分析典型焦化汙染場地不同粒徑土壤中PAHs的纍積及其與土壤有機碳含量(TOC)、比錶麵積(SA)等土壤性質的相關性,對北京焦化廠長期受PAHs汙染的土壤進行粒度分級[P1(0.5~1.0 mm)、P2(0.25~0.5 mm)、P3(0.15~0.25 mm)、P4(0.106~0.15 mm)、P5(0.075~0.106 mm)、P6(<0.075 mm)],測定瞭各粒徑土壤的理化性質及土壤中USEPA優先控製的16種PAHs的濃度,探究PAHs在不同粒徑土壤中的纍積特徵,併通過PAHs質量分數及土壤部分理化性質的麯線擬閤結果分析PAHs的賦存特徵。結果錶明:各粒徑土壤中16種PAHs均有檢齣,其最高質量分數大多齣現在P1粒徑土樣,最低質量分數齣現在 P4、P5中。各粒徑土壤中2~3(低)環 PAHs、ΣPAHs16質量分數變化趨勢相似,均為 P1>P2>P3、P4、P6>P5(P<0.05),4(中)、5~6(高)環PAHs趨勢類似,均為P1、P2>P3>P6>P4、P5(P<0.05)。比錶麵積(SA)、總有機碳(TOC)、可溶解性有機碳(DOC)與各類PAHs的質量分數呈現一定的相關性,各類PAHs質量分數隨SA的增大呈先增大隨後減小趨勢,最大質量分數所對應的SA為38~41 m2·g-1,隨TOC的增加呈先減小隨後增大趨勢,最小質量分數所對應的TOC為7.0~8.7 g·kg-1。不同粒徑土壤顆粒中,基于汙染物毒性噹量因子(TEF)的等效質量分數與汙染物實際質量分數變化趨勢併不相同,ΣPAHs16實際質量分數變化趨勢為P1>P2、P3、P4、P6>P5(P<0.05),而其等效質量分數則為P1、P2、P3、P4、P6>P5(P<0.05)。
위분석전형초화오염장지불동립경토양중PAHs적루적급기여토양유궤탄함량(TOC)、비표면적(SA)등토양성질적상관성,대북경초화엄장기수PAHs오염적토양진행립도분급[P1(0.5~1.0 mm)、P2(0.25~0.5 mm)、P3(0.15~0.25 mm)、P4(0.106~0.15 mm)、P5(0.075~0.106 mm)、P6(<0.075 mm)],측정료각립경토양적이화성질급토양중USEPA우선공제적16충PAHs적농도,탐구PAHs재불동립경토양중적루적특정,병통과PAHs질량분수급토양부분이화성질적곡선의합결과분석PAHs적부존특정。결과표명:각립경토양중16충PAHs균유검출,기최고질량분수대다출현재P1립경토양,최저질량분수출현재 P4、P5중。각립경토양중2~3(저)배 PAHs、ΣPAHs16질량분수변화추세상사,균위 P1>P2>P3、P4、P6>P5(P<0.05),4(중)、5~6(고)배PAHs추세유사,균위P1、P2>P3>P6>P4、P5(P<0.05)。비표면적(SA)、총유궤탄(TOC)、가용해성유궤탄(DOC)여각류PAHs적질량분수정현일정적상관성,각류PAHs질량분수수SA적증대정선증대수후감소추세,최대질량분수소대응적SA위38~41 m2·g-1,수TOC적증가정선감소수후증대추세,최소질량분수소대응적TOC위7.0~8.7 g·kg-1。불동립경토양과립중,기우오염물독성당량인자(TEF)적등효질량분수여오염물실제질량분수변화추세병불상동,ΣPAHs16실제질량분수변화추세위P1>P2、P3、P4、P6>P5(P<0.05),이기등효질량분수칙위P1、P2、P3、P4、P6>P5(P<0.05)。
To investigate the accumulation of Polycyclic Aromatic Hydrocarbons (PAHs) in different particle size fraction of soil and the correlation between the concentrations and soil physicochemical property, the naturally aged PAHs contaminated soil taken from a typical coke oven plant at southeast suburb of Beijing, China, was mechanically screened and classified by particle size, P1(0.5~1.0 mm), P2(0.25~0.5 mm), P3(0.15~0.25 mm), P4(0.106~0.15 mm), P5(0.075~0.106 mm), P6(<0.075 mm). The physicochemical property parameters such as pH, specific surface area (SA), total organic carbon (TOC), dissolved organic carbon (DOC) and cation exchange capacity (CEC), and concentrations of 16 priority PAHs in USEPA list were analyzed in the six particle size fractions. The results demonstrated that 16 PAHs were detected in each particle size fractions, where the highest total PAHs concentration occurred in P1 size fraction, and the lowest occurred in P4 and P5 size fraction. Low rings PAHs (2~3 carbon rings) and the total PAHs had the similar concentration changing trend, P1 > P2 > P3, P4, > P5, P6 > P5 (p < 0.05), whereas another similar trend, P1, P2 > P3 > P6 > P4, P5 (p < 0.05), appeared at both the middle rings PAHs (4 carbon rings) and the high rings PAHs (5~6 carbon rings). It suggested that the concentration of PAHs had depended on SA、TOC and DOC for all the six size particles. With the augment of SA, the concentration of 16 PAHs increased to a highest value, 38~41 m2·g-1, before the decrease at the P6 size particle. As for relationship between PAHs and TOC, the concentrations of PAHs decreased to .0~8.7 g·kg-1 with the increase of TOC, followed by the increase at P6 size particle. Furthermore, it was revealed that the toxic equivalency factors (TEF) concentration had a changing trend P1 > P2, P3, P4, P6 > P5 (p < 0.05), differing from the actual quality concentration changing trend, which was P1, P2, P3, P4, P6 > P5 (p < 0.05).