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Effect.of environment.l fact.rs on t.e effect.veness of ammoniat.d bagasse in wicking oil from cont.minat.d wet.ands

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Journal of Environment.l Sciences 2012年第8期24卷 1371-1377页

作者： Seungjoon Chung makram t.suidan Albert.D.Venosa t.chnology Development.Cent.r Samsung Engineering Co.Ltd.SuwonGyeonggi 443-823South Korea Facult. of Engineering and Archit.ct.re American University of BeirutBeirut 11072020Lebanon Nat.onal Risk Management.Research Laborat.ry U.S.Environmental Protection AgencyCincinnatiOH 45268USA

Ammoniat.d bagasse is a plant.derived organic sorbent.t.at.can be used for capt.ring oil and for supplying slow-release nut.ient. t. oil-degrading microorganisms. We invest.gat.d t.e oil-wicking behavior of t.is sorbent.under various condit.ons for it. effect.veness in remediat.ng oil-cont.minat.d wet.ands. Abiot.c microcosms simulat.ng a wet.and environment.were used t. assess t.e influence of sand part.cle sizes （20x30 and 60x80 U.S. mesh）, degrees of oil sat.rat.on （25% and 75%）, wat.r t.ble levels （on t.p of t.e clean sand layer, oiled-sand layer, and sorbent.layer）, and t.e presence of sorbent. Result. indicat.d t.at.oil wicking favors higher oil cont.minat.on, larger sand part.cle size, and low wat.r coverage. Wat.r coverage was t.e predominant.fact.r limit.ng t.e effect.veness of sorbent. t.e most.plausible explanat.on for t.is limit.t.on was t.at.sorbent.capt.red more wat.r t.an oil at.higher wat.r coverage.

关键词： crude oil wet.ands sorbent remediat.on sediment

Performance of rot.t.ng drum biofilt.r for volat.le organic compound removal at.high organic loading rat.s

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Journal of Environment.l Sciences 2008年第3期20卷 285-290页

作者： YANG Chunping CHEN Hong ZENG Guangming ZHU Xueqing suidan makram t College of Environment.l Science and Engineering Hunan University Changsha 410082 China Depart.ent.of Civil and Environment.l Engineering University of Cincinnati Cincinnati OH 45221-0071 USA

Uneven dist.ibut.on of volat.le organic compounds （VOCs） and biomass, and excess biomass accumulat.on in some biofilt.rs hinder t.e applicat.on of biofilt.at.on t.chnology. An innovat.ve mult.layer rot.t.ng drum biofilt.r （RDB） was developed t. correct.t.ese problems. t.e RDB was operat.d at.an empt. bed cont.ct.t.me （EBCt. of 30 s and a rot.t.onal rat. of 1.0 r/min. Diet.yl et.er was chosen as t.e model VOC. Performance of t.e RDB was evaluat.d at.organic loading rat.s of 32,1, 64.2, 128, and 256 g et.er/（m^3·h）（16.06 g et.er/（m^3·h） ≈ 1.0 kg chemical oxygen demand （COD）/（m^3·d））. t.e EBCt.and organic loading rat.s were recorded on t.e basis of t.e medium volume. Result. show t.at.t.e et.er removal efficiency decreased wit. an increased VOC loading rat.. Et.er removal efficiencies exceeding 99% were achieved wit.out.biomass cont.ol even at.a high VOC loading rat. of 128 g et.er/（m^3·h）. However, when t.e VOC loading rat. was increased t. 256 g et.er/（m^3·h）, t.e average removal efficiency dropped t. 43%. Nut.ient.limit.t.on possibly cont.ibut.d t. t.e drop in et.er removal efficiency. High biomass accumulat.on rat. was also observed in t.e medium at.t.e t.o higher et.er loading rat.s, and removal of t.e excess biomass in t.e media was necessary t. maint.in st.ble performance. t.is work showed t.at.t.e RDB is effect.ve in t.e removal of diet.yl et.er from wast. gas st.eams even at.high organic loading rat.s. t.e result. might.help est.blish crit.ria for designing and operat.ng RDBs.

关键词： biofilt.at.on organic loading rot.t.ng drum biofilt.r (RDB) volat.le organic compound

Novel cont.nuous single-st.p synt.esis of nit.ogen-modified t.O_2 by flame spray pyrolysis for phot.cat.lyt.c degradat.on of phenol in visible light

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Journal of Mat.rials Science & t.chnology 2018年第9期34卷 1494-1502页

作者： t.irupat.i Boningari Siva Nagi Reddy Int.ri makram suidan Panagiot.s G.Smirniot.s Chemical Engineering Program College of Engineering & Applied Science University of Cincinnati Environment.l Engineering College of Engineering & Applied Science University of Cincinnati

A novel rapid and cont.nuous process has developed for t.e synt.esis of nit.ogen-doped t.O2（N-t.O2）wit. flame spray pyrolysis（FSP） met.od. t.e nit.ogen incorporat.on int. t.O2 was achieved by a facile modificat.on（addit.on of dilut. nit.ic acid） in t.e precursor for t.e synt.esis. t.e cat.lyst. were charact.rized by X-ray diffract.on, Raman spect.oscopy, t.ansmission elect.on microscopy, diffuse reflect.nce spect.oscopy, and X-ray phot.elect.on spect.oscopy. t.e doping of nit.ogen int. t.e t.O2 was confirmed by X-ray phot.elect.on spect.oscopy（XPS） and energy dispersive X-ray（EDX） spect.oscopy. t.e UV-vis spect.a of t.e modified cat.lyst.（wit. primary N source） exhibit.d band-gap narrowing for 4 N-t.O2 wit. band gap energy of 2.89 eV, which may be due t. t.e presence of nit.ogen in t.O2 st.uct.re. t.e int.oduct.on of secondary N-source（urea） int. t.O2 cryst.l lat.ice result. in addit.onal reduct.on of t.e band gap energy t. 2.68 eV and shows a significant.improvement.of visible light.absorpt.on. t.e N-t.O2 nanopart.cles modified by using secondary N-source showed significant.phot.cat.lyt.c act.vit. under visible light.much higher t.an t.O2. t.e higher act.vit. is at.ribut.d t. t.e synerget.c int.ract.on of nit.ogen wit. t.e t.O2 lat.ice. t.e lowering of t.e band-gap energy for t.e flame made N-doped t.O2 mat.rials implies t.at.t.e nit.ogen doping in t.O2 by aerosol met.od is highly effect.ve in ext.nding t.e opt.cal response of t.O2 in t.e visible region. t.e nit.ogen at.mic percent.ge has increased monot.nically（0.09%-0.15%）wit. t.e increase in primary nit.ogen source（nit.ic acid）, and significant.y boost.d t. 0.97% when secondary nit.ogen source（urea） was int.oduced. t.e highest.rat. of phenol degradat.on was obt.ined for cat.lyst. wit. secondary N source due t. increase in N cont.nt.in t.e cat.lyst.

关键词： Flame spray pyrolysis(FSP) t.t.nia (t.O2) Visible-light.induced Liquid phase Phenol phot.degradat.on

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厌氧活性炭滤池对酚类的处理

环境科学与管理 1985年第3期 1-11页

作者： makram t.suidan 姜安玺

绪言酚类化物(苯的一元羟基衍生物)是炼焦厂、煤气化厂、炼油厂、石油化工、溶剂、炸药生产、玻璃纤维制造以及飞机维修等工业废水的主要成分。Mazur以及 Ganczarczyk 和 ELion发现炼焦废水用活性污泥处理,其中酚的去除率超过99％。Cape... 详细信息

绪言酚类化物(苯的一元羟基衍生物)是炼焦厂、煤气化厂、炼油厂、石油化工、溶剂、炸药生产、玻璃纤维制造以及飞机维修等工业废水的主要成分。Mazur以及 Ganczarczyk 和 ELion发现炼焦废水用活性污泥处理,其中酚的去除率超过99％。Capest.ny 等人报导了用活性污泥处理高浓度含酚废水的类似研究结果。氧化塘、污泥曝气湖和氧化塔据报导对低浓度含酚废水处理或对进一步降低活性污泥厂出水中的酚含量是有效的。一般说来,各种好氧生化处理法对含酚废水处理是有效的,其结果使废水的化学需氧量(COD)、总有机炭(t.C)

关键词：滤柱进水 COD t.C 厌氧粒状活性炭甲烷产量酚类