• 文献标题:   Nanofiltration range desalination by high flux graphene oxide impregnated ultrafiltration hollow fiber mixed matrix membrane
  • 文献类型:   Article
  • 作  者:   MUKHERJEE R, BHUNIA P, DE S
  • 作者关键词:   desalination, hollow fiber, mixed matrix membrane, graphene oxide, seawater
  • 出版物名称:   JOURNAL OF CLEANER PRODUCTION
  • ISSN:   0959-6526 EI 1879-1786
  • 通讯作者地址:   Indian Inst Technol Kharagpur
  • 被引频次:   2
  • DOI:   10.1016/j.jclepro.2018.12.162
  • 出版年:   2019

▎ 摘  要

In this work, a novel graphene oxide impregnated ultrafiltration grade hollow fiber membrane was prepared having capability of salt rejection in the range of nanofiltration. Sodium sulfate showed higher rejection (40%-50%) than the other salts, magnesium sulfate and sodium chloride. Charge-charge interaction is the major salt retention mechanism. Optimum operating conditions were identified as 55 kPa transmembrane pressure drop and 5 L/h cross-flow rate. Increasing the solution pH from 5 to 9 augmented the rejection of sodium sulfate from 43% to 51% at relatively high permeate flux 0.25 L/m(2).h.kPa. In case of filtration of actual sea water, the permeate flux is lowered to 0.20 L/m(2).h.kPa due to presence of other fouling agents. Rejection of total dissolved solids was 30% for seawater. Beyond 11 h (breakthrough time) the rejection decreases due to screening of charge effects of the membrane surface. Pretreatment by activated carbon delayed the breakthrough time to 14 h and improved permeate flux 0.22 L/m(2).h.kPa. Thus, ultrafiltration grade hollow fiber mixed matrix membrane offers equivalent salt rejection of nanofiltration membrane at a much higher throughput. (C) 2018 Elsevier Ltd. All rights reserved.