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Industrial wastewater pre-treatment for heavy metal reduction by employing a sorbent-assisted ultrafiltration system 总被引:1,自引:0,他引:1
This work examined the adoption of a sorbent-assisted ultrafiltration (UF) system for the reduction of Pb(II), Cu(II), Zn(II) and Ni(II) from industrial wastewater. In such a system metals were removed via several processes which included precipitation through the formation of hydroxides, formation of precipitates/complexes among the metal ions and the wastewater compounds, adsorption of metals onto minerals (bentonite, zeolite, vermiculite) and retention of insoluble metal species by the UF membranes. At pH = 6 the metal removal sequence obtained by the UF system was Pb(II) > Cu(II) > Zn(II) > Ni(II) in mg g−1 with significant amount of lead and copper being removed due to chemical precipitation and formation of precipitates/complexes with wastewater compounds. At this pH, zinc and nickel adsorption onto minerals was significant, particularly when bentonite and vermiculite were employed as adsorbents. Metal adsorption onto zeolite and bentonite followed the sequence Zn(II) > Ni(II) > Cu(II) > Pb(II), while for vermiculite the sequence was Ni(II) > Zn(II) > Cu(II) > Pb(II) in mg g−1. The low amount of Pb(II) and Cu(II) adsorbed by minerals was attributed to the low available lead and copper concentration. At pH = 9 the adoption of UF could effectively reduce heavy metals to very low levels. The same was observed at pH = 8, provided that minerals were added. The prevailing metal removal process was the formation of precipitates/complexes with wastewater compounds. 相似文献
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Papadopoulos A Malamis S Moustakas K Kiranoudis CT Loizidou M 《Environmental monitoring and assessment》2007,130(1-3):255-270
This work focuses on the development and application of appropriate software tools for recording, assessing and reporting
data related to the operation of the Urban Wastewater Treatment Plants (UWTPs) in Cyprus. An appropriate Internet-Based Management
System was designed, developed and installed at the premises of the UWTPs and of the Cypriot Competent Authority (Water Development
Department — WDD) in order to coordinate and disseminate tasks and related information for monitoring the operation of UWTPs.
In addition, a client Geographical Information System database was compiled to be used for obtaining and analyzing spatial
information. The software tools are based on common procedures and state-of-the-art technology for the recording and transmission
of data and information and they provide an integrated view related to the operation and the efficiency of wastewater treatment
systems. Moreover, continuous control and systematic monitoring of the UWTPs by the operators as well as continuous and direct
supervision of the UWTPs environmental performance is achieved by the personnel of the Competent Authority. Furthermore, direct
and unobstructed provision of data to the Competent Authority of Cyprus is accomplished by the operators of the UWTPs, while
the Competent Authority is supported to compose full and representative reports to the European Commission and other International
Organizations. The developed tools enable the direct recording of data obtained through measurements and analyses, permit
the comparison of data with existing legislation and provide an integrated picture of the operation of the wastewater treatment
plants as well as the option to focus and assess each individual treatment stage. 相似文献
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Chatzikonstantinou Alexandra V. Giannakopoulou Αrchontoula Spyrou Stamatia Simos Yannis V. Kontogianni Vassiliki G. Peschos Dimitrios Katapodis Petros Polydera Angeliki C. Stamatis Haralambos 《Environmental science and pollution research international》2022,29(20):29624-29637
Environmental Science and Pollution Research - As olive leaves constitute the main by-product of the olive oil industry with important environmental and economic impact, there is an increasing... 相似文献
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