scholarly journals Winter Maintenance Wash-Water Heavy Metal Removal Pilot Scale Evaluation

2016 ◽  
Vol 2016 ◽  
pp. 1-10
Author(s):  
Christopher M. Miller ◽  
William H. Schneider IV ◽  
Mufuta J. Tshimanga ◽  
Philip Custer
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Pilot Scale ◽  
Wash Water ◽  
Metal Concentrations ◽  
Winter Maintenance ◽  
Scale Evaluation ◽  
Heavy Metal Concentrations ◽  
Pilot Unit ◽  
Copper Zinc

To encourage sustainable engineering practices, departments of transportation are interested in reusing winter maintenance truck wash water as part of their brine production and future road application. Traffic-related metals in the wash water, however, could limit this option. The objective of this work was to conduct a pilot scale evaluation of heavy metal (copper, zinc, iron, and lead) removal in a filtration unit (maximum flow rate of 45 L/minute) containing proprietary (MAR Systems Sorbster®) media. Three different trials were conducted and approximately 10,000 L of wash water collected from a winter maintenance facility in Ohio was treated with the pilot unit. Lab studies were also performed on six wash-water samples from multiple facilities to assess particle size removal and estimate settling time as a potential removal mechanism during wash-water storage. Pilot unit total metal removal efficiencies were 79%, 77%, 63%, and 94% for copper, zinc, iron, and lead, respectively. Particle settling calculation estimates for copper and zinc show that 10 hours in storage can also effectively reduce heavy metal concentrations in winter maintenance wash water in excess of 70%. These pilot scale results show promise for reducing heavy metal concentrations to an acceptable level for reuse.

scholarly journals Removal of Heavy Metals during Primary Treatment of Municipal Wastewater and Possibilities of Enhanced Removal: A Review

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1121
Author(s):  
Sylwan Ida ◽  
Thorin Eva
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Municipal Wastewater ◽  
Metal Removal ◽  
Metal Speciation ◽  
Heavy Metal Removal ◽  
Primary Treatment ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
Removal Of Heavy Metals

Resource reuse has become an important aspect of wastewater management. At present, use of sludge in agriculture is one of the major reuse routes. Conventional municipal wastewater treatment does not involve any designated process for removal of heavy metals, and these distribute mainly between effluent and sludge. Enhanced removal of heavy metals during primary treatment may decrease the heavy metal concentrations in both effluent and sludge from secondary treatment and promote long-term reuse of secondary sludge. This review considers heavy metal occurrence and removal during primary settling, together with possible treatment technologies for heavy metal removal in primary settlers and their theoretical performance. The variation in total heavy metal concentrations and dissolved fraction in raw municipal wastewater points to a need for site-specific assessments of appropriate technologies for improved heavy metal removal. Studies examining the heavy metal speciation beyond dissolved/particulate are few. Missing or disparate information on process parameters such as hydraulic retention time, pH and composition of return flows makes it hard to generalize the findings from studies concerning heavy metal removal in primary settlers. Coagulation/flocculation and use of low-cost sorbents were identified as the most promising methods for enhancing heavy metal removal during primary settling. Based on the available data on heavy metal speciation and removal during primary settling, sorption technologies may be most effective for enhancing the removal of Cu and Ni, while coagulation may be efficient for Cd, Cr, Cu, Pb, Zn and Hg removal (but not as efficient for Ni removal).

Heavy metal concentrations in roadside soils of Lithuania's highways

Geologija ◽  
2008 ◽  
Vol 50 (4) ◽  
pp. 237-245 ◽  
Author(s):  
Audronė Jankaitė ◽  
Pranas Baltrėnas ◽  
Agnė Kazlauskienė
Keyword(s):  
Heavy Metal ◽  
Roadside Soils ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations

scholarly journals Lead smelting alters wheat flour heavy metal concentrations and health risks

2021 ◽  
Author(s):  
Liping Li ◽  
Yuqing Zhang ◽  
James A. Ippolito ◽  
Weiqin Xing ◽  
Chen Tu
Keyword(s):  
Heavy Metal ◽  
Wheat Flour ◽  
Health Risks ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
Lead Smelting
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