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粉末活性炭-超滤膜组合工艺去除水体中藻类及微囊藻毒素

净水技术2017,36(2) : 62-68Water Purification Technology 李响,寻昊,赵梦,等?粉末活性炭■超滤膜组合工艺去除水体中藻类及微囊藻毒素[J]?净水技术,2017,36(2) : 62-68.

Li Xiang, Xun Har, Zhao Meng, et al.Removal of algae and micrrcystin from water by integrated P A C一U F process[J].Water Purification Technology,2017,36(2) : 62-68.

粉末活性炭-超滤膜组合工艺去除水体中藻类及微囊藻毒素

李响,寻昊,赵梦,周丽,邓慧萍

(同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092)

摘要研究粉末活性炭(P A C)、超滤膜(U F)及二者组合工艺对微囊藻毒素(M C-R R)及藻细胞的去除效果,发现粉末活性炭对M C-R R吸附容量为0.23 p g/g,其吸附等温线可以用L a n g m u i r吸附等温线模拟,吸附效果随P A C投加量增大而增大。

单独超滤膜运行初期对M C-R R去除效果仅为8.5% ,且随着藻细胞在超滤膜上聚集,去除率有所下降。B P A C -U F组合工

艺运行初期M C-R R去除率达到85%,运行20 d后去除率稳定在70%。对组合工艺中微生物进行高通量测序显示在门水平上变形菌门和拟杆菌门分别占比为80. 8%和11.6%,在种水平上最主要的三类为粘细菌、屈挠杆菌和甲基营养菌,其占比分

别为34. 3%、.4%和 12.7%。

关键词粉末活性炭超滤膜组合工艺铜绿微囊藻微囊藻毒素

中图分类号:X522文献标识码:A文章编号:1009 -0177(2017)02-0062 -07

D O I:10.15890/j. cnki. jsjs. 2017. 02. 011

Removal of Algae and Microcystin from Water by Integrated PAC - UF Process

Li X i a n g,X u n H a o,Z h a o M e n g,Z h o u L i,D e n g H u i p i n g

{State Key Laboratory of Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Tongji University,Shanghai 200092, China)

Abstract Removal e f f i c i e n c y o f mic ro c y s t i n (MC_ R R)and m i c r o c y s t i s c e l l s by powdered a c t i v a t e d carbon (PAC),u l t r a f i l t r a t i o n membrane (UF)and PAC—UF combination p r oc ess was discussed.R e s u l t s showed t h a t a d s o r p t i o n c a p a c i t y o f PAC on MC—RR was

0.23 pg/g,and is ot her ms could be si mula te d by Langmuir a d s o r p t i o n isotherm.Adsorption e f f e c t was p r o p o r t i o n a l t o dosage o f PAC.

I n t h e i n i t i a l s t a g e o f UF operat ion,removal r a t e o f MC—RR was8.5%,bu t t h e removal e f f i c i e n c y was decreased w i t h t h e a g g r e g a t i o n o f m i c r o c y s t i s c e l l on t h e UF s u r f a c e.The i n i t i a l MC—RR removal r a t e o f BPAC_ UF combination p r o ce ss was85% and s t a b i l i z e d a t 70% a f t e r20 days.Micro-organisms on PAC were determined by hi gh throughput sequencing.Resul t i n d i c a t e d t h a t p r o t e o b a c t e r i a and b a c t e r o i d e t e s accounted f o r 80. 8% and 11. 6% r e s p e c t i v e l y.Three main t y p e s o f b a c t e r i a l genus were haliangium(34. 3% ),f l e x i b a c t e r(8.4% ),m e t h l o v e r s a t i l i s(12.7% ).

K e y w o r d s powdered a c t i v a t e d carbon (PAC)u l t r a f i l t r a t i o n membrane (UF)i n t e g r a t e d p r o c e s s m i c r o c y s t i s a e r u g i n o s a m i c r o c y s t i n

随着全球变暖及工农业的不断发展,水体富营

[收稿日期]2016-05-27

[基金项目]国家水体污染控制与治理科技重大专项

(2014ZX07405002D)

[作者简介]李响(991 一)男,硕士,研究方向为给水处理理论 技术。电话:188********; E-mail: hj_lixiang@

163. c o m。

[通信作者]邓慧萍,E-mail: denghuiping@ tong+https://www.wendangku.net/doc/2919165760.html,. cn。

[本文编辑]魏雨晴

—62 —养化程度日益严重,导致许多湖泊、水库及河流藻类 尤其是蓝藻过量繁殖而频繁发生水华。蓝藻爆发不 仅使水质恶化,生态系统造成破坏,同时净水过程中 藻细胞破裂会释放出藻毒素、嗅味物质及藻类有机 物[1],对饮用水水质安全造成严重威胁。

世界上25% ~70%的蓝藻水华污染可产生藻毒素[2],其中出现频率最高、产生量最大、造成危害 最严重的是微囊藻毒素(microcystins,M C s)。微囊

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