Modification of cyanobacterial bloom-derived biomass using potassium permanganate enhanced the removal of microcystins and adsorption capacity toward cadmium (II)

TY - JOUR

T1 - Modification of cyanobacterial bloom-derived biomass using potassium permanganate enhanced the removal of microcystins and adsorption capacity toward cadmium (II)

AU - Shao, Jihai

AU - Gu, Ji Dong

AU - Peng, Liang

AU - Luo, Si

AU - Luo, Huili

AU - Yan, Zhiyong

AU - Wu, Genyi

N1 - Funding Information: The present research is supported by National Water Science and Technology Projects of China (2014ZX07206001); public benefit research foundation from Chinese Environmental Protection Department Foundation of Furong scholar project of Hunan Province; ( 201409051 )(GY Wu); National Natural Science Foundation of China (No. 51104064 ).

PY - 2014/5/15

Y1 - 2014/5/15

N2 - Cyanobacterial biomass shows high adsorption capacity toward heavy metal ions. However, the cyanotoxins in the cyanobacterial biomass inhibit its application in heavy metals removal. In order to safely and effectively remove Cd(II) from water using cyanobacterial bloom-derived biomass (CBDB), KMnO4 was used to modify CBDB. The results indicated that the microcystins in the CBDB were successfully removed by KMnO4. Potassium permanganate oxidation caused the transformation of hydroxyl to carboxyl on the CBDB, and formed manganese dioxide on the surface of CBDB. The oxidized CBDB showed higher adsorption capacity toward Cd(II) than that of unoxidized treatment. The optimal KMnO4 concentration for increasing the adsorption capacity of CBDB toward Cd(II) was 0.2g/L. The adsorption isotherm of Cd(II) by oxidized- or unoxidized-CBDB was well fitted by Langmuir model, indicating that the adsorption of Cd(II) by CBDB was monolayer adsorption. The desorption ratio of Cd(II) from oxidized CBDB was higher than that from unoxidized CBDB in the desorption process using NH4NO3 and EDTA as desorbent. The results presented in this study suggest that KMnO4 modified CBDB may be used as a safe and high efficient adsorbent in Cd(II) removal from water.

AB - Cyanobacterial biomass shows high adsorption capacity toward heavy metal ions. However, the cyanotoxins in the cyanobacterial biomass inhibit its application in heavy metals removal. In order to safely and effectively remove Cd(II) from water using cyanobacterial bloom-derived biomass (CBDB), KMnO4 was used to modify CBDB. The results indicated that the microcystins in the CBDB were successfully removed by KMnO4. Potassium permanganate oxidation caused the transformation of hydroxyl to carboxyl on the CBDB, and formed manganese dioxide on the surface of CBDB. The oxidized CBDB showed higher adsorption capacity toward Cd(II) than that of unoxidized treatment. The optimal KMnO4 concentration for increasing the adsorption capacity of CBDB toward Cd(II) was 0.2g/L. The adsorption isotherm of Cd(II) by oxidized- or unoxidized-CBDB was well fitted by Langmuir model, indicating that the adsorption of Cd(II) by CBDB was monolayer adsorption. The desorption ratio of Cd(II) from oxidized CBDB was higher than that from unoxidized CBDB in the desorption process using NH4NO3 and EDTA as desorbent. The results presented in this study suggest that KMnO4 modified CBDB may be used as a safe and high efficient adsorbent in Cd(II) removal from water.

KW - Adsorption

KW - Cadmium

KW - Cyanobacterial biomass

KW - Cyanobacterial bloom

KW - Manganese dioxide

KW - Microcystins

UR - http://www.scopus.com/inward/record.url?scp=84896979603&partnerID=8YFLogxK

U2 - 10.1016/j.jhazmat.2014.03.013

DO - 10.1016/j.jhazmat.2014.03.013

M3 - 文章

C2 - 24681589

AN - SCOPUS:84896979603

SN - 0304-3894

VL - 272

SP - 83

EP - 88

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

ER -