Showing papers in "Waste Management in 1995"

TL;DR: In this article, the sorption of chromate ions from aqueous solutions on bentonite has been studied by a batch technique and the mean free energy of sorption, E, for Cr(VI) is 10 kJ/mol.

TL;DR: In this paper, the current status of interfacial chemistry at the solid-liquid boundary and places it in perspective with present and future s s processes based on Portland cement and pozzolanic materials.

TL;DR: In this paper, the authors used activated carbon prepared from peanut hulls (PHC), an agricultural waste byproduct, for the adsorption of Ni(II) from aqueous solution.

TL;DR: In this article, the authors used phase-pure form of zeolite P to obtain 0.1 Na2O 3.2SiO 2.4H2O and 0.9CaO.

TL;DR: Organoclay has been used to remove mechanically emulsified oil and grease at 5-7 times the rate of activated carbon, or 50% of its dry weight as discussed by the authors.

TL;DR: In this paper, an industrial waste containing large amounts of arsenic (42 wt %) was studied, and the waste was treated using solidification/stabilisation technology (S S ) with cement and pozzolanic materials.

TL;DR: In this paper, the authors used the batch technique to study the sorption of strontium on bentonite using the Freundlich, Langmuir and Dubinin-Radushkevich isotherms.

TL;DR: In this paper, commercial samples of synthetic zeolites 13X, AR-1, 4A and ZSM-5 have been characterized and evaluated for their performance towards the removal of caesium from pure aqueous solutions as well as from actual radioactive liquid wastes.

TL;DR: In this article, the authors present a review of minestone applications in hydraulic, harbour and road engineering as well as mine backfilling and restoration of derelict land, and two sections are devoted to the prevention of spontaneous heating and combustion of minstones and to the impact of minstone structures on the environment and its protection.

TL;DR: The data support the hypothesis that surface-active components present in the oleophilic fertilizer formulation, Inipol EAP 22, may have significantly contributed to the positive results reported in tests of remedial agent impact on bioremediation, which was used as a supplemental clean up technology on Exxon Valdez crude oil-contaminated Alaskan beaches.

TL;DR: In this paper, the directory effect of chlorophenol isomers has been evaluated by the rate constants of the dechlorination kinetic model developed in this study, and it is found that 3-CP is faster than that of 4-CP.

TL;DR: In this paper, slag-modified grouts were used to stabilize soils contaminated with trivalent and hexavalent chromium, and the permanence of leach resistance was enhanced by higher slag levels in grout.

TL;DR: In this paper, the reaction results of 46 reaction products of 46 compositions have led to the identification of phase compatibility regions, with the lowest solubilities obtained among the uranium-containing phases which are also compatible with Cz.sbnd, Sz.SBnd, UO3·2H2O, SiO2, and H2O gel.

TL;DR: In this paper, the effectiveness of using sulfur polymer cement (SPC) as a binder to stabilize/solidify lead-contaminated soils has been addressed, and it was shown that additives such as sodium sulfide or sodium sulfite, could be used to greatly enhance the ability of SPC to react chemically with lead contaminants, and physicochemically to bind these compounds.

TL;DR: In this article, the effect of various phenol concentrations on cement setting time, strength and pore fluid composition was studied, and a simple model has been proposed to quantify the phenol leached from the cement-solidified, contaminated soil during both leaching tests.

TL;DR: In this article, the relationship between the aqueous equilibrium concentration and the loss of SDS from solution with and without the presence of an electrolyte (NaCl) was established using batch and column experiments.

TL;DR: In this paper, the behavior of metals during the fluidized bed thermal treatment of artificially prepared metal-contaminated clay was experimentally and theoretically investigated, and the observed results indicated that metal volatilization is mainly a function of treatment temperature and treatment duration.

TL;DR: The results indicate that oil spill dispersants and drilling fluids affect the ability of marine bacteria to metabolize these substrates in the environment.

TL;DR: The increase in PAH availability to the microorganisms in the aqueous phase produced an increase in oxygen consumption that is proportional to the biodegradation of organic compounds.

TL;DR: In this article, the use of sonochemistry in treating chlorinated chemicals in water was explored and evidence for sonochemical transformation and dechlorination of the target chemicals and mixtures was obtained from controlled experiments measuring (1) increases in titratable chloride from sonochemical treatment, (2) decreases in pH, (3) changes in aqueous phase UV/visible absorption spectra, (4) changes from changes in electrochemistry, and (5) generation of sonolysis products and/or decreases in target compounds vs appropriate control in internally standardized GC-MS

TL;DR: In this paper, an integrated waste minimization approach for the printed circuit board manufacturing shop of Lawrence Berkeley Laboratory (LBL) was demonstrated. But the results of a series of bench and process experiments indicated that optimization of pH, chemical dosage, and addition of ferrous sulfate were needed to destabilize complexed copper.

TL;DR: In this article, the potential of a special scrubber waste, NISCO Cyclone Ash (NCA), which contains substantial calcium oxide and calcium sulfites/sulfates for solidification/stabilization (S/S) of toxic metal wastes was evaluated.

TL;DR: In this paper, a set of materials for use as a passive barrier for intercepting a 90-Srir plume within a surficial water-bearing sand and gravel layer was evaluated through a series of batch sorption tests.

TL;DR: In this paper, the main phenolic compounds identified in this wastewater were phenol, cresols, resorcinol and 5-methylresorcinols, which can be reduced almost by any oxidation method studied.

TL;DR: In this paper, a fine-grained mafic (basalt, serpentinite, scrap iron) blanket of aggregate was placed below and around the LLRW repository to reduce the release of radionuclides from low level radioactive waste disposal facilities.

TL;DR: In this paper, the authors evaluated the performance of continuous bioreactor treatment of diesel-contaminated sandy soils and found that up to 91% removal efficiency was achieved at a loading of 1335 mg TPH/kg wet sand, operated at a biological solid retention time of 60 days.

TL;DR: In this article, the effectiveness of steam as a sweep gas in the low temperature thermal desorption (LTTD) process was investigated by placing a stainless steel tube containing a predetermined amount of contaminated soil in an electrical furnace.

TL;DR: In this article, the authors investigated the use of fiber reinforcement to improve the performance of hydraulic barriers exposed to excessive drying or to wet-dry cycles, and found that fiber reinforcement increased post-cracking postcracking permeability.

TL;DR: In this article, the feasibility of one-and two-step processes for precipitating/coprecipitating radionuclides from nuclear reactor cooling water, filtering with pozzolanic filter aid, and solidifying, are reported.