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污泥固化稳定化处理对重金属形态的影响
are
of
gu舢my
minerals and hea、,),metal Speciations
me results of S/S with bentonite
s01ely.
(4)The
relationships between heaVy metal speciations a11d their leaching characteristics
Carbonates)、F3(Bomld
Iron觚d Man92ulese Oxides)a11d
to
F4(Bound
O唱aulic Matter),leached Zn were右lom F3(Bound
Pb were丘.om
Iron
aIld
MangaIlese
to
Oxides),leached
Orgallic Ma骶r).
30%and 22%.
(2)The
bentonite
rules about S/S elevated the
a艉cted
heav),metals’specia_tions were Cu、ZIl、 Pb,they were
analysed.S/S with changed
t0
Solely
stabilities of
论文作者(签名):-二主华bL
2咿
多
月
J7
日
1.绪论
1.绪论 1.1研究背景
污泥是污水处理厂对污水进行处理过程中产生的沉淀物质以及污水表面漂出的浮沫 所得的残渣,其成分复杂,含有大量的微生物、病原体、重金属以及有机污染物等,如处 理不善将会造成严重的二次污染。污泥产生量约占污水总处理量的O.3%~5%(含水率以97% 计)‘¨,U
to know deeply the infection of
solidificatio∥stabilization
on
heavy
metals in sludge,this study researched the rules of the cement treated solely,the bentonite treated solely,and they treated together.Then,the primaD,reaSons of specjations were analyzed疗om pH,contents results about heaVy metal speciations in
118mg・kg~、10mg・kg~,Cu主要以有机结合态存在,其含量高达83%,Zn和Pb的不稳定
态含量都较高,分别达到30%和22%。
(2)污泥固化/稳定化处理中Cu、Zn、Pb形态变化规律研究。膨润土单独处理提高
了Cu、Zn、Pb的整体稳定性,它们都向更稳定的形态转化;而水泥单独处理提高了Cu
contents
n啪bers
can
not
of unstable in
completely.The results of heavy metal indicate
to
speciations
transfo姗ed
to
experiment
tllat
leached
Cu、vere丘。om
F 1(ExchaJlgeable)、F2(Bound t0
Were researched.Ttle contents of leaching and unstable Speciations indicate that leaching coments
of Cu、 Zn、 Pb
renect the sizes
aI.e
generalJy Iower than unstable speciations’contents,their speciations’ leaching
was used in this study、Vere analysed.The respectiVe content ofCu、Zn、Pb is 192mg・kg~、763
mg‘kg~、
l
25 l mg’kg~,the
to
respectiVe
leaching
content
is
O.5mg‘kg~、
11 8mg・kg~、
果好。
(3)固化/稳定化污泥中pH、腐殖酸和粘土矿物与Cu、Zn、Pb形态间关系研究。采 用水泥固化/稳定化污泥,分析pH和腐殖酸含量与重金属形态关系,重金属形态随pH变 化而变化的规律与随水泥添加量变化而变化的规律相似,但随腐殖酸含量变化而变化的规
律与随水泥添加量变化而变化的规律相反;采用膨润土固似稳定化污泥,分析粘土矿物含
论文作者(签名).
.兰癯也矽拜
多月J;,
日
学位论文使用授权说明
河海大学、中国科学技术信息研究所、国家图书馆、中国学术期 刊(光盘版)电子杂志社有权保留本人所送交学位论文的复印件或电 子文档,可以采用影印、缩印或其他复制手段保存论文。本人电子文 档的内容和纸质论文的内容相一致。除在保密期内的保密论文外,允 许论文被查阅和借阅。论文全部或部分内容的公布(包括刊登)授权河 海大学研究生院办理。
transfo咖ations
of heaVy metal
on
ofh啪ic acid
and gummy minerals.Based
the
S/S
sludge,the relationships bet、veen heavy metal
speci“on
aIld
its leaching characteristic were analysed a11d it provides academic basis for
含量对重金属形态变化产生的作用;在掌握固化/稳定化引起重金属形态变化规律的基石出
上,分析重金属形态与其浸出行为问关系,为固化/稳定化污泥中重金属长期稳定性评价提
供理论基础。本文具体研究内容包括: (1)本研究首先分析所用污泥中Cu、Zn、Pb总量、浸出量和赋存形态。污泥中Cu、 Zn、Pb总量分别为:192mg.k百1、763 mg・kg~、251mg・kg~,浸出量分别为:O.5mg・kg~、
on
柚d pH、content ofhumic
acid waS developed baSed
are
s/S谢th
cement soJely;t11e rules between metal speciations aJld
are
heav),metal speciations and pH
simiIar with the mles
0mg’kg一,F4(Bound
O唱anic Maner)is the prima巧speciation of Cu,its
content is close to
83%,the unStable speciations’contems ofZn、Pb were higkrespective
content is
a虢cted by
S/S,aIld to reduse
the cost of S/S.The results indicated that tlle stabilites of Cu、Zn were elevated.and the efrects on Pb were better than S/S with bentonite s01ely.
量与重金属形态问关系。
(4)固化/稳定化污泥中cu、Zn、Pb形态与浸出毒性间关系研究。从浸出量与非稳
定态含量间的对比可以发现,固化/稳定化污泥中Cu、Zn、Pb浸出量往往小于其不稳定态 含量,不能够完全反映出固化/稳定化污泥中不稳定形态的浓度高低。从浸出实验中重金属 形态的变化量可以看出,固化/稳定化污泥中Cu的浸出来自可溶及可交换态、碳酸盐结合 态、铁.锰氧化物结合态和有机结合态;Zn的浸出来自铁.锰氧化物结合态;Pb的浸出来自 铁.锰氧化物结合态和有机结合态。
关键词:污泥;固化/稳定化;重金属形态;pH;腐殖酸;黏土矿物;浸出毒性;
ABSTRACT
ABSTRACT
S01idi6catjon/Stabilization of sludge become more and more popul甄and js coming into the
stage
of印plication.In order
be觚een heaVy
content of cement,but t11e 11Jles between hea、∥metal speciations and
contem of humic acid
contra巧toⅡ1e mles
content
bet、^,een heaVy metal speciations a11d content of cement;the mles bet、veen
compressiVe stren舀h
material which can elevate
aJld bentonite was
of sludge,
the metllod of S/S
with
cement
conSidered,the pu印ose waS to elevate the stabilities of Cu、Zn、Pb
stabler
speciation.S/S
with cement solely elevated the coment of Cu’s unstable speciation aIld the
St a_bility of Pb.But cemem is an efrective