Wyniki wyszukiwania - BazTech

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Stabilization/Solidification of Waste Containing Heavy Metals and Hydrocarbons Using OPC and Land Trass Cement

Masrullita, Burhan R. Y. P., Trihadiningrum Y.

Journal of Ecological Engineering

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2018

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Vol. 19, nr 6

88--96

EN

The stabilization/solidification process (S/S) is one of the alternative methods of treating B3 waste, especially heavy metal. The S/S uses cement as the solidification agent. The cement will bind heavy metal pollutants in a monolithic mass with a sturdy structure, thus inhibiting its movement. The presence of hydrocarbons affects the S/S strength. Therefore, it is necessary to add pozzolan material which can absorb hydrocarbon constituting the cement blocking component of pozzolan cement, i.e. Ordinary Portland Cement (OPC) combined with trass soil. This study aims to determine the maximum content of organic materials in the form of hydrocarbons can stabilize/solidify heavy metals contained in wastes containing hydrocarbons. This research is conducted in two steps. Stage I aims to obtain the optimum composition of the mixture. On the other hand, stage II is to determine the maximum content of hydrocarbons in percent weight that can stabilize/solidify organic wastes containing heavy metals – Cu, Cr, and Pb in artificial wastes. The composition of OPC and trass soil was varied at a ratio of 100: 0, 5:25, 50:50, 25:75 and 0: 100. The hydrocarbons used in step II were paraffin, added to the optimum composition of OPC and trass soil with a proportion of 2.5%, 5%, 5% and 10%. The S/S product quality test was performed, involving: compressive strength test, Toxicity Characteristic Leaching Procedure (TCLP) and paint filter test. Strength test was conducted using a compressive strength testing apparatus Toasters Universal Testing Machine Type RAT-200, MFG No. 20380 CAP 200 tf. TCLP test under US-EPA (method 1311). The method of analysis pertaining to heavy metal concentrations involved a colorimetric method for Cr (VI), neocuproine for Cu, and dithizone for Pb. The paint test refers to the US EPA 9095B method. The results showed that the optimum composition of OPC mixture: trass soil was 50:50, which is the composition used in stage II. The results of compressive strength test were 2770 tons/m2. The TCLP test results for heavy metals Cu and Pb with hydrocarbon addition on Cu 10% and Pb 2.5% reached 0.076 and 0.076 mg/L, respectively. The result of the paint filter test indicates that there is no remaining free fluid.

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Stabilization/Solidification of Tailing on Traditional Gold Mining in Kulon Progo Using Fly Ash

Rachman R. M., Bahri A. S., Trihadiningrum Y.

Journal of Ecological Engineering

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2018

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Vol. 19, nr 3

178--184

EN

Traditional gold mining activity is one of the sources of mercury contamination. Total mercury concentration in tailing ponds in Kulon Progo ranged from 164.49 mg/kg to 383.21 mg/kg, which exceeded the quality standard values set by the government of Indonesia No. 101 of 2014, which is 75 mg/kg. One method that can be applied is stabilization/solidification (S/S). This study aims to determine the optimum composition of the tailing mixture with fly ash in S/S process. The variations of fly ash composition with tailing are 100: 0, 90: 10, 80: 20, 70: 30, 60: 40, 50: 50, 40: 60, 30: 70, 20: 80 and 10: 90. The results of the study found that the optimum composition of fly ash: tailings was 10: 90, with compression test of 74 ton/m2 and TCLP test was 0.0069 mg/L. The obtained compression test results were in accordance with US EPA Standard quality of 35 ton/m2. TCLP test results meet the standard of Indonesian Government Regulation no. 101 of 2014, amounting to 0.05 mg/L.

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Studies on solidification of wastes from metal coating

Banaszkiewicz K.P., Marcinkowski T.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 3

51-55

EN

There are over 1000 electroplating workshops functioning in Poland; they are agglomerated in automotive industry, agricultural and construction machines industry, precision instruments industry, electronics, electrotechnics, etc.. . The chemical composition of wastes from galvanizing plants strictly depends on the technological processes as well as the methods of neutralization of industrial wastewaters. The wastes mentioned can be neutralized, among other possibilities, using cement, fly ashes or lime. The material that gains the widest applicability for treating a wide spectrum of hazardous wastes is Portland cement. Using cement enables an improvement of the physical (solidifying) and chemical characteristics of various kinds of wastes, that ensures a decrease in the mobility of contaminants (stabilization). The process using Portland cement (CEM I 32,5 R) was used towards galvanic sludges. The results presented in this article allow for the assesment of the applicability of mixture of cement with mortar sand, as well as the mixture of cement and flotation tailings for the stabilizing and solidifying galvanic sludge, containing mainly Cr, Cu, Zn and Ni. The presented study was also concentrated on the limitation in the transport of leached contaminants to the environment, the reduction of the solubility of hazardous contaminants, as well as a change in the physical structure of the waste - in other words, derivation of the product that could be mechanically durable during transport and storage.

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Metoda stabilizacji/solidyfikacji jako forma detoksykacji i unieszkodliwienia stałych odpadów niebezpiecznych z hutnictwa

Frąckowiak A., Pacholewska M., Buzek J.

Rudy i Metale Nieżelazne

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2006

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R. 51, nr 6

325-332

PL

W artykule podano wyniki badań dotyczące możliwości zastosowania metody stabilizacji/solidyfikacji (S/S) w celu unieszkodliwienia gąbki kadmowej pochodzącej z oczyszczania elektrolitu cynkowego. W eksperymencie zastosowano siedem rodzajów mieszanek zestalających na bazie cementu portlandzkiego i hutniczego, z takimi dodatkami jak: piasek, bentonit wapniowy i utwardzacz polimerowy. Produkty końcowe zestalania zanalizowano głównie pod względem efektywności unieruchomienia w nich metali ciężkich, tj.: Cd, Pb, Zn, Fe i Cu oraz pod kątem ich wytrzymałości. Stwierdzono, że zastosowane mieszanki zestalające dały pozytywne efekty i uzyskano brykiety i granulki o znacznej wytrzymałości mechanicznej i odporności na wypłukiwanie metali ciężkich. Najlepsze efekty w immobilizacji niebezpiecznych dla środowiska metali dały mieszanki na bazie cementu portlandzkiego i hutniczego z piaskiem. Z kolei najwyższą wytrzymałością charakteryzowały się produkty zestalania na bazie cementu portlandzkiego z dodatkiem bentonitu wapniowego.

EN

The paper presents the results of investigations concerning possibilities of using stabilization/solidification (S/S) method in neutralization of cadmic sponge which comes from zinc elektrolite cleaning. Seven different mixtures were used in the experiment. They were done on the base of Portland cement and metallurgic cement with such additions as: sand, calcium bentonite and polimeric hardner. The final cementing products were analyzed in relation to their efficiency of immobilizing heavy metals: Cd, Pb, Zn, Fe and Cu in then and taking their endurance into account. It was stated that cementing mixture which were applied gave positive effects and briquettes and were obtained which featured considerable mechanical endurance and resistance to heavy metals leaching. Mixtures made of Portland and metallurgical cement from sand gave the best effects in the immobilization of dangerous metals. On the other hand the products made of Portland cement with calcium bentonite addition featured the higest endurance.