Aktiivsöe valmistamise võimalused biomudastPikkov, Lui; Kallas, Juha; Rikmann, ErgoXXIII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid1997 / lk. 107

Methods for purification of xylidine-polluted waterReinik, Janek2003 https://www.ester.ee/record=b1833095*est

Possibilities of production of active carbon from biological sludgePikkov, Lui; Kallas, Juha; Rikmann, Ergo23rd Estonian Chemistry Days : abstracts of scientific conference1997 / p. 117

Purification of phenolic wastewater using aerobic bio-oxidation combined with activated carbon treatment and ozonationJärvik, Oliver; Kamenev, Inna; Viiroja, Andres; Kallas, JuhaOzone : science & engineering2010 / 6, p. 417-423 : ill

Reovee puhastamine aeroobse biooksüdatsiooniga kombineeritult aktiivsöetöötlusega ja osoonimisegaJärvik, Oliver; Kamenev, Inna; Kallas, JuhaXXIX Eesti keemiapäevad : teaduskonverentsi ettekannete teesid = 29th Estonian Chemistry Days : abstracts of scientific conference2005 / lk. 25-26

Samiiniga reostatud põhjavee puhastamine granuleeritud aktiivsöegaReinik, Janek; Viiroja, Andres; Kallas, Juha; Munter, Rein; Verenich, Svetlana; Preis, SergeiXXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 122-123

Treatment of samine polluted groundwater by means of granulated activated carbon in a packed bed adsorberReinik, Janek; Kallas, Juha3rd International Conference of PhD Students : Engineering Sciences : University of Miskolc, Hungary, 13-19 August 2001. Vol. I2001 / p. 387-392 : ill

Xylidine-polluted groundwater purification. Wet oxidation - wet air oxidation using granulated active carbonKallas, Juha; Reinik, JanekScientific proceedings of Riga Technical University. Series: Material Science and Applied Chemistry2002 / p. 208-215

Xylidini-polluted groundwater purification-wet air oxidation used granulated active carbonReinik, Janek43th RTU Conference of Materials Science and Applied Chemistry2002 / ? p