An infiltration device as a best management practice for immobilizing heavy metals in urban highway runoff

1995 ◽  
Vol 32 (1) ◽  
pp. 119-125 ◽  
Author(s):  
J. J. Sansalone ◽  
S. G. Buchberger
Keyword(s):  
Heavy Metals ◽  
Suspended Solids ◽  
Suspended Particle ◽  
Management Practice ◽  
Best Management Practice ◽  
Poor Correlation ◽  
Strong Positive Correlation ◽  
Dissolved Metals ◽  
Highway Runoff ◽  
Best Management

Anthropogenic constituents in highway runoff include metal elements and suspended solids which result from traffic activities, atmospheric deposition, roadway degradation and highway maintenance. A best management practice (BMP) for immobilizing heavy metals and suspended solids is a partial exfiltration trench (PET). A PET is designed to exfiltrate a percentage of infiltrated runoff to subsoil with the balance discharged through an underdrain. The PET functions through adsorptive-filtration, where dissolved metals are immobilized through sorption and metals associated with suspended solids are immobilized through filtration. An important PET design consideration is potential association of heavy metals with suspended solids. This paper investigates the correlation between heavy metals and suspended solids in highway runoff. Results indicate a strong positive correlation between heavy metal and suspended solid concentrations for snow washoff events and a poor correlation for rainfall-runoff events. Similar results are observed for correlations between metals and suspended particle sizes. From these findings, it is argued that a PET holds promise as a device for immobilizing metals associated with suspended solids transported during snow washoff and long duration rainfall events.

Use of a Biofilter for Treatment of Heavy Metals in Highway Runoff

2000 ◽  
Vol 35 (3) ◽  
pp. 563-312 ◽  
Author(s):  
Y.L. Lau ◽  
J. Marsalek ◽  
Q. Rochfort
Keyword(s):  
Heavy Metals ◽  
Effective Treatment ◽  
Laboratory Testing ◽  
Suspended Solids ◽  
Stormwater Runoff ◽  
Field Scale ◽  
Treatment Efficiency ◽  
Dissolved Metals ◽  
Highway Runoff ◽  
Cu And Zn

Abstract Effective treatment of Stormwater by laboratory-scale biofilters has demonstrated that these simple filters may be used to remove dissolved metals and sediment-adsorbed metals found in Stormwater runoff. Laboratory testing indicated that even biofilm just 3 days old provided suspended solids and heavy metals removals in excess of 90%. A filter operated for 9 weeks retained its treatment efficiency and removed more than 90% of total Cu and Zn. Field-scale testing is recommended.

Implementation of a Best Management Practice (BMP) System for a Clay Mining Facility in Taiwan

2006 ◽  
Vol 41 (7) ◽  
pp. 1315-1326 ◽  
Author(s):  
JEN-YANG LIN ◽  
YEN-CHANG CHEN ◽  
WALTER CHEN ◽  
TSU-CHUAN LEE ◽  
SHAW L. YU
Keyword(s):  
Management Practice ◽  
Best Management Practice ◽  
Best Management

Dynamic behavior of suspended pollutants and particle size distribution in highway runoff

2002 ◽  
Vol 46 (11-12) ◽  
pp. 413-418 ◽  
Author(s):  
H. Furumai ◽  
H. Balmer ◽  
M. Boller
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Suspended Solids ◽  
Dynamic Change ◽  
First Flush ◽  
Highway Runoff ◽  
Runoff Rate ◽  
Highway Drainage

Continuous runoff quality monitoring was conducted for one month at urban highway drainage with an area of 8.4 ha. Dynamic change of suspended solids and heavy metal concentrations were investigated during first flush periods, taking the particle size distribution into consideration. Except for Pb, the concentrations of TSS and heavy metals in runoff were within the range of the EMC reported in recent highway runoff research. Particle-bound heavy metals (Zn, Pb, and Cu) accounted for more significant pollutant loads than soluble fractions. Their content decreased with increasing total SS concentration in runoff samples. The results of particle size distribution (PSD) analysis of runoff samples indicate that high TSS concentration samples contained coarser particles. Based on the PSD results, a stepwise wash-off phenomenon of TSS under varying runoff rate conditions was explained by the different washoff behavior of fine (< 20 mm) and coarser particles.

scholarly journals Assessing biogeochemical effects and best management practice for a wheat–maize cropping system using the DNDC model

2014 ◽  
Vol 11 (1) ◽  
pp. 91-107 ◽  
Author(s):  
F. Cui ◽  
X. Zheng ◽  
C. Liu ◽  
K. Wang ◽  
Z. Zhou ◽  
...  
Keyword(s):  
Nitrate Leaching ◽  
Irrigation Water ◽  
Crop Yields ◽  
Management Practice ◽  
Best Management Practice ◽  
Nitrification Inhibitors ◽  
Nh3 Volatilization ◽  
Dndc Model ◽  
Best Management ◽  
Management Alternatives

Abstract. Contemporary agriculture is shifting from a single-goal to a multi-goal strategy, which in turn requires choosing best management practice (BMP) based on an assessment of the biogeochemical effects of management alternatives. The bottleneck is the capacity of predicting the simultaneous effects of different management practice scenarios on multiple goals and choosing BMP among scenarios. The denitrification–decomposition (DNDC) model may provide an opportunity to solve this problem. We validated the DNDC model (version 95) using the observations of soil moisture and temperature, crop yields, aboveground biomass and fluxes of net ecosystem exchange of carbon dioxide, methane, nitrous oxide (N2O), nitric oxide (NO) and ammonia (NH3) from a wheat–maize cropping site in northern China. The model performed well for these variables. Then we used this model to simulate the effects of management practices on the goal variables of crop yields, NO emission, nitrate leaching, NH3 volatilization and net emission of greenhouse gases in the ecosystem (NEGE). Results showed that no-till and straw-incorporated practices had beneficial effects on crop yields and NEGE. Use of nitrification inhibitors decreased nitrate leaching and N2O and NO emissions, but they significantly increased NH3 volatilization. Irrigation based on crop demand significantly increased crop yield and decreased nitrate leaching and NH3 volatilization. Crop yields were hardly decreased if nitrogen dose was reduced by 15% or irrigation water amount was reduced by 25%. Two methods were used to identify BMP and resulted in the same BMP, which adopted the current crop cultivar, field operation schedules and full straw incorporation and applied nitrogen and irrigation water at 15 and 25% lower rates, respectively, than the current use. Our study indicates that the DNDC model can be used as a tool to assess biogeochemical effects of management alternatives and identify BMP.

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