Authors:Sangita Pal, Suchismita Mishra, S. Satpati, G. Pandit, P. Tewari, and V. Puranik
“In-House” resin Polyacrylhydroxamic acid (PHOA) has been synthesized and utilized targeting ground water remediation; recovery
of uranium from low concentration aqueous solution e.g., mining activities related water, flooding of excavated or deplumed
areas, nuclear plant washed effluent and process generated effluents in nuclear plant during front-end as well as back-end
treatment. In the present study, treatment of field effluent containing heavy metals and radio-nuclides from contaminated
mining sites reflected preference for uranium with respect to manganese. The specific complexation between the extractant
and metal ion especially uranium provides high distribution co-efficient (Kd) for uranium (Kd,U = 1,450 mL/g from inlet of Effluent Treatment Plant (ETP) and Kd,U = 74,950 mL/g for synthetic solution) compared to high level impurity (1,000 times higher concentration) of manganese (Kd,Mn = 111 mL/g from inlet of ETP and Kd,Mn = 10,588 mL/g for synthetic solution). The “In-House” resin showed significant extractability (70–95% elution efficiency)
and indicates a possibility of selective removal/recovery of the valuable metal ions even from secondary sources. As a specialty,
resin can be regenerated and reused.
Authors:Maha Refaey, Nóra Kováts, Á. Kárpáti, and P. Thury
Kováts, N., Szalay, T., Kiss, I., Kárpáti, Á., Paulovits, G. (2002) Assessment of degradability in whole effluent toxicity testing using bioluminescent bacteria.
Hung. J. of Ind. Chem. 30
effluent treatments, as much as 90% of these dyes are estimated to still get discharged into rivers were chemically unchanged. The decomposition of dye molecules depends on the complexity of the dye structures. Classified on the basis of their chemical
Authors:S. Husaini, J. Zaidi, Matiullah, M. Arif, and M. Akram
The indiscriminate discharge of untreated industrial effluents and solid wastes into the open environment poses a serious
threat to the ecosystem. Gujranwala is an industrial city of Pakistan wherein a large number of different industries are situated
and majority of them are not equipped with proper recycling or effluent treatment plants. Unfortunately, untreated industrial
effluents are locally used for the irrigation purposes which may result in higher concentrations of toxic metals in the crops
and vegetables. Therefore, prime objective of the present study was to determine concentrations of toxic metals in the polluted
soils, vegetables and crops grown in the vicinity of industrial areas using neutron activation analysis technique. The results
obtained showed higher values of toxic metals in the studied samples. The observed highest concentration of As (0.94 ± 0.06)
in spinach, Br (69 ± 9) in turnip, Co (0.83 ± 0.01) in millet, Cr (51.7 ± 4.2) in wheat, Mn (76.2 ± 7.3) in tomato, Sb (0.5 ± 0.06)
in rice, Cl (31698 ± 3921) and Se (3.4 ± 0.4) in carrot. These values are higher than those reported in the literature.
The use of a naturally available Lateritic Soil (LS) for the removal of mercury from industrial effluents has been investigated. Adsorption of Hg on LS from aqueous solution is reported, describing the effect of equilibration time, hydrogen ions, adsorbent and adsorbate concentration. The contact time required is less than two minutes and adsorption capacity is 15 g/kg.
Nile. III. Toxicity assessments of six industrial effluents polluting the River Nile. - Environmental Toxicology and Water Quality 8 : 239-254.
Water quality of River Nile. III. Toxicity assessments of six industrial effluents
The paper deals with the use of some ceramic materials for the removal of55+59Fe3+ and60Co2+ ions from residual waters. For this purpose, chamotte powder has been used both by itself or in a mixture with aluminium oxide. The pastes obtained by wetting these materials have been shaped in the form of crucibles. The radioactive ions which exist in residual effluents, have been retained to a large extent on these filters. Separately, the leaching of radioactive ions previously retained on the filtering mass, has been studied under the influence of water and of diluted solutions of hydrochloric acid or sodium chloride.
Trace element contents from effluents of a simulated coal-fired magnetohydrodynamic (MHD) combustion process have been determined
using thermal neutron activation analysis techniques. The quality control consisted of replicate analyses of standard rock
(G-2) for precision and accuracy determination. The concentration of elements in various samples were fairly constant throughout
the process stream. Elemental ratios of trace elements at one sampling position (SDA) are presented but cannot easily be explained.
However, the high concentration of arsenic in SDA was attributed to incomplete separation of slag from the adhering lining.
Potassium concentration in the thickener tank was consistent with the solubility of potassium salts and the data support possible