scholarly journals Physical-chemical treatment of tar sand processing wastewater: Task No. 3. Dewatering of foamate residuals; Task No. 4. Leaching potential of sludges; and Task No. 5. Summary of economic considerations. Final report

1983 ◽  
Author(s):  
P.H. King
Keyword(s):  
Chemical Treatment ◽  
Final Report ◽  
Leaching Potential ◽  
Physical Chemical ◽  
Economic Considerations ◽  
And Task

Physical-Chemical Treatment of Acid Mine Water from a Superfund Site

1989 ◽  
Vol 19 (3) ◽  
pp. 237-263 ◽  
Author(s):  
Marcia H. Bates ◽  
John N. Veenstra ◽  
John Barber ◽  
Raju Bernard ◽  
Julie Karleskint ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Mine Water ◽  
Superfund Site ◽  
Acid Mine Water ◽  
Acid Mine ◽  
Physical Chemical

scholarly journals Imazapic interaction and mobility in soil cultivated with sugarcane in northeast Brazil

RBRH ◽  
2021 ◽  
Vol 26 ◽  
Author(s):  
Fernando Xavier de Assis ◽  
André Maciel Netto ◽  
Bruno Toríbio de Lima Xavier ◽  
Valmir Felix de Lima ◽  
João Paulo Siqueira da Silva
Keyword(s):  
Partition Coefficients ◽  
Biological Effects ◽  
Clay Content ◽  
Breakthrough Curves ◽  
Northeastern Brazil ◽  
Adsorption Potential ◽  
Soil Columns ◽  
Leaching Potential ◽  
Physical Chemical ◽  
Sorption Leaching

ABSTRACT In the plantation of sugarcane, Imazapic has used pre- or post-emergence, alone or in combination with other herbicides. When applied to the soil in pre-emergence, Imazapic can undergo the sorption, leaching and/or degradation processes due to physical, chemical and biological effects, besides being absorbed by weeds. The objective of this work was to evaluate the interaction and mobility of the Imazapic herbicide in the soil where the soil columns with a dystrophic Yellow Ultisol (YUd) and a dystrophic Red-Yellow Oxisol (RYOd) from northeastern Brazil were used. The higher adsorption potential of the RYOd is associated with higher clay content, higher Fed and Feo concentrations, and soil acidic pH. The CDE – 2 sorption sites model adequately represented the experimental data from the Imazapic breakthrough curves to the RYOd and YUd soils. From the Kd partition coefficients for RYOd and YUd, high values of the GUS index (5.94 and 7.04, respectively) were calculated, confirming the high leaching potential of the Imazapic molecule in these soils.

AMMONIA REMOVAL BY PHYSICAL-CHEMICAL TREATMENT

2013 ◽  
pp. 731-745
Author(s):  
Peter F. Atkins ◽  
Dale A. Scherger ◽  
Robert A. Barnes ◽  
Francis L. Evans
Keyword(s):  
Chemical Treatment ◽  
Ammonia Removal ◽  
Physical Chemical

scholarly journals Various Impregnation Methods Used for the Surface Modification of the Adsorbent: A Review

2018 ◽  
Vol 7 (4.7) ◽  
pp. 330 ◽  
Author(s):  
C. R. Girish ◽  
. .
Keyword(s):  
Surface Modification ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Surface Properties ◽  
Chemical Treatment ◽  
Water Contamination ◽  
Recent Time ◽  
Operating Conditions ◽  
Physical Chemical

The water contamination is an important crisis which is to be addressed in the recent time. The pollutants present in wastewater are treated by adsorption using activated carbon, which is considered as one of the effective method. The adsorbent has to be modified to improve the adsorption capacity and the surface properties. Various methods such as physical, chemical treatment, impregnation and functionalization techniques are available. Impregnation is one of the effective method carried out for surface modification and to increase the adsorption capacity. Therefore, current study investigates the different impregnation methods used for the surface modification of the adsorbent. It also reviews the various precursors used for adsorbent preparation, the impregnating agent, the operating conditions and the adsorption capacity of the adsorbent.  

Use of polishing pond effluents to cultivate lettuce (Lactuca sativa) in a hydroponic system

2008 ◽  
Vol 58 (10) ◽  
pp. 2051-2057 ◽  
Author(s):  
R. Keller ◽  
K. Perin ◽  
W. G. Souza ◽  
L. S. Cruz ◽  
E. Zandonade ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Chemical Treatment ◽  
Microbial Contamination ◽  
Winter Season ◽  
Nutrient Content ◽  
Algae Biomass ◽  
Hydroponic System ◽  
Physical Chemical ◽  
Hydroponic Cultivation ◽  
Winter Time

The sanitary quality and productivity of hydroponic lettuce (Lactuca sativa L.) plants cultivated under greenhouse conditions and treated with effluent from anaerobic reactor + polishing pond followed by physical-chemical treatment was evaluated. Two hydroponic cultivations were performed at summer and winter time at Vitoria-ES, Brazil. The treatments for both cultivations were: T1) conventional nutrient solution, T2) effluent from physical-chemical treatment, T3) effluent from polishing pond, and T4) effluent from polishing pond with 50% dilution. The plants were evaluated for microbial contamination, productivity and nutrient content. In all cases, no significant microbial contamination of lettuce was detected and the levels of macronutrients in the shoot system were similar to those in published reports. In the experiments from summer season, the treatments T1 and T2 resulted in higher production than the T3 and T4 treatments. Plants from T3 and T4 had a less developed root system as a result of reduced oxygenation from competition with the higher algae biomass content from the polishing pond effluent. In the winter season, the effect of the algal biomass was pronounced only in the T3 treatment (undiluted effluent from polishing pond). In conclusion, hydroponic cultivation of lettuce with pond effluent is suitable as a complement to water and nutrients for plants.

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