High efficient removal of tetracycline from solution by degradation and flocculation with nanoscale zerovalent iron

TY - JOUR

T1 - High efficient removal of tetracycline from solution by degradation and flocculation with nanoscale zerovalent iron

AU - Fu, Yuncong

AU - Peng, Liang

AU - Zeng, Qingru

AU - Yang, Yang

AU - Song, Huijuan

AU - Shao, Jihai

AU - Liu, Shiyu

AU - Gu, Jidong

N1 - Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/6/5

Y1 - 2015/6/5

N2 - The removal of tetracycline (TC) with nanoscale zerovalent iron modified by starch (starch-NZVI) was investigated using batch experiments as a function of reactant concentration, pH, time, competitive anions and ionic strength. The removal efficiency of 99% was obtained, 30% which was contributed from the adsorption and degradation and 69% which was attributed to flocculation when 500. mg/L TC was processed with 0.20. g/L starch-NZVI. The TC removal capacity of starch-NZVI increases with increasing the TC concentration. Furthermore, the flocculation kinetics was strongly dependent on pH and ionic strength. Neutral environment and high ionic strength can improve efficiently the sedimentation rate. The XPS analysis of flocculation showed that the Fe consisted of mainly Fe(III) and some Fe(II). LC-MS analysis revealed that the organic components included TC and the degradation products which resulted from the oxidization effect for TC. Our results firstly demonstrated that the combination degradation with flocculation is an efficient method on TC removal from solution with NZVI.

AB - The removal of tetracycline (TC) with nanoscale zerovalent iron modified by starch (starch-NZVI) was investigated using batch experiments as a function of reactant concentration, pH, time, competitive anions and ionic strength. The removal efficiency of 99% was obtained, 30% which was contributed from the adsorption and degradation and 69% which was attributed to flocculation when 500. mg/L TC was processed with 0.20. g/L starch-NZVI. The TC removal capacity of starch-NZVI increases with increasing the TC concentration. Furthermore, the flocculation kinetics was strongly dependent on pH and ionic strength. Neutral environment and high ionic strength can improve efficiently the sedimentation rate. The XPS analysis of flocculation showed that the Fe consisted of mainly Fe(III) and some Fe(II). LC-MS analysis revealed that the organic components included TC and the degradation products which resulted from the oxidization effect for TC. Our results firstly demonstrated that the combination degradation with flocculation is an efficient method on TC removal from solution with NZVI.

KW - Complex

KW - Flocculation

KW - Iron

KW - Tetracycline

UR - http://www.scopus.com/inward/record.url?scp=84924265847&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2015.02.070

DO - 10.1016/j.cej.2015.02.070

M3 - 文章

AN - SCOPUS:84924265847

SN - 1385-8947

VL - 270

SP - 631

EP - 640

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -