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1、AdvancesinEnvironmentalProtection环境保护前沿,2017,7(5),390-396PublishedOnlineOctober2017inHans.http://www.hanspub.org/journal/aephttps://doi.org/10.12677/aep.2017.75052AdsorptionofHexavalentChromiuminWaterbyModifiedAquaticPlantsDengyueYang,XinruiWu,TaoLiu,BoWangInstituteofEco-EnvironmentalSciences,
2、LiaoningShihuaUniversity,FushunLiaoningndththReceived:Sep.22,2017;accepted:Oct.7,2017;published:Oct.13,2017AbstractInthispaper,theaquaticplantlitteradsorbentsofCr(VI)inwaterwerepreparedbychemicalmodificationmethodusingthelitterwastesofPhragmitescommunis,CattailandZizanialatiflorainartificialwe
3、tlands.Theadsorptionperformanceandadsorptionmechanismofthemodifiedlit-terofmodifiedaquaticplantswerestudiedbycontrollingtheinitialconcentrationofCr(VI),theadsorptiontimeandthepHofCr(VI)solution.TheresultsshowedthattheadsorptionprocessofCr(VI)wasarapidandslowprocess,andtheadsorptionwas8h.Theres
4、ultsshowedthatthead-sorptionprocessofCr(VI)intheearlystageoftheadsorptionprocesswasrapidandadsorptionafter8hourstoreachabalance.Thequasi-second-orderkineticadsorptionequationcanbetterdescribetheadsorptionprocessofCr(VI)ofthemodifiedaquaticlitter,andtheLangmuiriso-thermismoresuitableforthemodif
5、iedlitter.Thesaturatedadsorptioncapacitiesofmodifiedreed,cattailandZizaniacaduciflorawere20.168,19.5957and22.0419mg∙g−1,respectively.TheeffectofpHontheadsorptionofCr(VI)bythemodifiedaquaticplantswasobvious,andthelowerthepH,thelesstheadsorptionofCr(VI)onthemodifiedaquaticplants.KeywordsTheModif
6、iedofModifiedAquaticPlants,Adsorption,HexavalentChromium改性水生植物枯落物对水体六价铬的吸附杨登越,吴辛睿,刘涛,王博辽宁石油化工大学生态环境研究院,辽宁抚顺收稿日期:2017年9月22日;录用日期:2017年10月7日;发布日期:2017年10月13日文章引用:杨登越,吴辛睿,刘涛,王博.改性水生植物枯落物对水体六价铬的吸附[J].环境保护前沿,2017,7(5):390-396.DOI:10.12677/aep.2017.75052杨登越等摘要本文以人工湿地常用水生植物芦苇、香蒲和茭草的秋季枯落物废弃物为原料,利用化学改性
7、方法制备高效吸附水中Cr(VI)的改性水生植物枯落物吸附剂。通过控制Cr(VI)初始浓度、吸附时间、Cr(VI)溶液pH,研究改性水生植物枯落物的吸附性能以及吸附机制。结果表明,改性水生植物枯落物对Cr(VI)的吸附过程是一个先快速后缓慢的过程,吸附8h基本达到平衡。准二级动力学吸附方程能更好的描述改性水生植物枯落物对Cr(VI)的吸附过程,Langmuir等温线对改性水生植物枯落物的拟合效果更高。改性芦苇枯落物、香蒲枯落物、茭草枯落物的饱和吸附量Qm分别为20.16