羟基磷灰石/甘蔗渣生物质炭对水中Cd~(2+)的动态吸附研究
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摘要
以羟基磷灰石/甘蔗渣生物质炭为吸附剂,对水中重金属镉进行了吸附实验。研究了pH值、Cd~(2+)质量浓度、吸附剂质量、动态流速等对穿透曲线的影响。结果表明,穿透时间随着pH值、吸附剂量的增加而增大,随着Cd~(2+)质量浓度、动态流速的增加而缩短。Thomas模型常数(K_(TH))随着pH值、吸附剂量的增加而增大,随着初始Cd~(2+)质量浓度、动态流速的增加而减小,由Thomas模型拟合计算获得其对Cd~(2+)的饱和吸附量为43.15 mg/g。Adams-Bohart模型常数(K_(AB))随着初始Cd~(2+)质量浓度、动态流速增加而减小,随着pH值、吸附剂量增加而增大。
Cadmium in water was adsorbed by hydroxyapatite/bagasse biochar(HAP-BC) as adsorbent. The effects of pH value, Cd~(2+) mass concentration, adsorbent mass and dynamic flow rate on the penetration curve were studied. The results show that the variation trend of penetration time increases with the increase of pH value and adsorption dose, the penetration time decreases with the increase of Cd~(2+) mass concentration and dynamie flow rate. The Thomas model constant(K_(TH)) increases with the increase of pH value and adsorption dose, and decreases with the increase of initial Cd~(2+) mass concentration and dynamic flow rate. The saturated adsorption capacity of Cd~(2+) is 43.15 mg/g obtained by fitting the Thomas Model. The adams-bohart model constant(K_(AB)) decreases with the increase of initial Cd~(2+) mass concentration and dynamic flow rate, and increases with the increase of pH value, adsorption dose.
Cadmium in water was adsorbed by hydroxyapatite/bagasse biochar(HAP-BC) as adsorbent. The effects of pH value, Cd~(2+) mass concentration, adsorbent mass and dynamic flow rate on the penetration curve were studied. The results show that the variation trend of penetration time increases with the increase of pH value and adsorption dose, the penetration time decreases with the increase of Cd~(2+) mass concentration and dynamie flow rate. The Thomas model constant(K_(TH)) increases with the increase of pH value and adsorption dose, and decreases with the increase of initial Cd~(2+) mass concentration and dynamic flow rate. The saturated adsorption capacity of Cd~(2+) is 43.15 mg/g obtained by fitting the Thomas Model. The adams-bohart model constant(K_(AB)) decreases with the increase of initial Cd~(2+) mass concentration and dynamic flow rate, and increases with the increase of pH value, adsorption dose.
引文
[1]朱维,刘丽,吴燕明,等.组配改良剂对土壤-蔬菜系统铅镉转运调控的场地研究[J].环境科学,2005,36(11):4277-4282.
[2] WAN NGAH W S,FATINATHAN S.Pb(Ⅱ) biosorption using chitosan and chitosan derivatives beads equilibrium,ion exchange and mechanism studies [J].Journal of Environmental Sciences,2010,22(3):338-346.
[3] ROGéRIO LAUS,THIAGO G COSTA,BRUNO SZPOGANICZ,et al.Adsorption and desorption of Cu (Ⅱ),Cd (Ⅱ) and Pb (Ⅱ) ions using chitosan crosslinked with epichlorohydrin-triphosphate as the adsorbent [J].Journal of Hazardous Materials,2010,183(1):233-241.
[4]齐亚凤,何正艳,余军霞,等.改性甘蔗渣对Cu2+和Zn2+的吸附机理[J].环境工程学报,2013,7(2):585-590.
[5]严丹,毛芹利,周建刚,等.羟基磷灰石的制备及其在含铅废水处理中的应用[J].湖北大学学报(自然科学版),2016(3):213-219.
[6] PRIYANKA AGRAWAL,ANIL KUMAR BAJPAI.Biosorption of chromium (VI) ions from aqueous solutions by iron oxide-impregnated alginate nanocomposites:batch and column studies[J].Toxicological & Environmental Chemistry,2011,93(7):1277-1297.
[7]徐楠楠,林大松,徐应明,等.玉米秸秆生物炭对Cd2+的吸附特性及影响因素[J].农业环境科学学报,2014,33(5):958-964.
[8]戴红玲,叶鑫,向来,等.纳米Fe3O4/MnO2对镉的吸附及其机理研究[J].中国给水排水,2016,32(21):81-85.
[9]梁美娜,王敦球,朱义年,等.羟基磷灰石/甘蔗渣生物质炭复合吸附剂的制备及其对As(Ⅴ)的吸附机理[J].环境科学研究,2017,30(4):607-614.
[10] CRITTENDEN JOHN C,BERRIGAN JOHN K,HAND DAVID W.Design of rapid smallscale adsorption tests for a constant diffusivity [J].Journal (Water Pollution Control Federation),1986,58(4):312-319.
[11]梁美娜,朱义年,王敦球,等.纳米氧化铁/蔗渣活性炭对水中As(Ⅴ)的动态吸附研究[J].环境科学与技术,2017,40(7):97-102.
[12] YAO Shuhua,LIU Ziru,SHI Zhongliang.Adsorption behavior of cadmium ion onto synthetic ferrihydrite:effects of pH and natural seawater ligands[J].Journal of the Iranian Chemical Society,2014,6(11):1545-1551.
[13] MAHBOUBE SHIRANI,ALI AKBARI ,MOHSEN HASSANI.Adsorption of cadmium (II) and copper (II) from soil and water samples onto a magnetic organozeolite modified with 2-(3,4-dihydroxyphenyl)-1,3-dithiane using an artificial neural network and analysed by flame atomic absorptionspectrometry [J].Analytical Methods,2015,7(4):6012-6020.
[14] THOMAS HENRY C.Heterogeneous ion exchange in a flowing system[J].Journal of the American Chemical Society,1944,66:1664-1666.
[15] AHMED M J,HAMEED B H.Removal of emerging pharmaceutical contaminants by adsorption in a fixedbed column:A review [J].Ecotoxicology and Environmental Safety,2018,149(3):257-266.
[2] WAN NGAH W S,FATINATHAN S.Pb(Ⅱ) biosorption using chitosan and chitosan derivatives beads equilibrium,ion exchange and mechanism studies [J].Journal of Environmental Sciences,2010,22(3):338-346.
[3] ROGéRIO LAUS,THIAGO G COSTA,BRUNO SZPOGANICZ,et al.Adsorption and desorption of Cu (Ⅱ),Cd (Ⅱ) and Pb (Ⅱ) ions using chitosan crosslinked with epichlorohydrin-triphosphate as the adsorbent [J].Journal of Hazardous Materials,2010,183(1):233-241.
[4]齐亚凤,何正艳,余军霞,等.改性甘蔗渣对Cu2+和Zn2+的吸附机理[J].环境工程学报,2013,7(2):585-590.
[5]严丹,毛芹利,周建刚,等.羟基磷灰石的制备及其在含铅废水处理中的应用[J].湖北大学学报(自然科学版),2016(3):213-219.
[6] PRIYANKA AGRAWAL,ANIL KUMAR BAJPAI.Biosorption of chromium (VI) ions from aqueous solutions by iron oxide-impregnated alginate nanocomposites:batch and column studies[J].Toxicological & Environmental Chemistry,2011,93(7):1277-1297.
[7]徐楠楠,林大松,徐应明,等.玉米秸秆生物炭对Cd2+的吸附特性及影响因素[J].农业环境科学学报,2014,33(5):958-964.
[8]戴红玲,叶鑫,向来,等.纳米Fe3O4/MnO2对镉的吸附及其机理研究[J].中国给水排水,2016,32(21):81-85.
[9]梁美娜,王敦球,朱义年,等.羟基磷灰石/甘蔗渣生物质炭复合吸附剂的制备及其对As(Ⅴ)的吸附机理[J].环境科学研究,2017,30(4):607-614.
[10] CRITTENDEN JOHN C,BERRIGAN JOHN K,HAND DAVID W.Design of rapid smallscale adsorption tests for a constant diffusivity [J].Journal (Water Pollution Control Federation),1986,58(4):312-319.
[11]梁美娜,朱义年,王敦球,等.纳米氧化铁/蔗渣活性炭对水中As(Ⅴ)的动态吸附研究[J].环境科学与技术,2017,40(7):97-102.
[12] YAO Shuhua,LIU Ziru,SHI Zhongliang.Adsorption behavior of cadmium ion onto synthetic ferrihydrite:effects of pH and natural seawater ligands[J].Journal of the Iranian Chemical Society,2014,6(11):1545-1551.
[13] MAHBOUBE SHIRANI,ALI AKBARI ,MOHSEN HASSANI.Adsorption of cadmium (II) and copper (II) from soil and water samples onto a magnetic organozeolite modified with 2-(3,4-dihydroxyphenyl)-1,3-dithiane using an artificial neural network and analysed by flame atomic absorptionspectrometry [J].Analytical Methods,2015,7(4):6012-6020.
[14] THOMAS HENRY C.Heterogeneous ion exchange in a flowing system[J].Journal of the American Chemical Society,1944,66:1664-1666.
[15] AHMED M J,HAMEED B H.Removal of emerging pharmaceutical contaminants by adsorption in a fixedbed column:A review [J].Ecotoxicology and Environmental Safety,2018,149(3):257-266.