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Nowadays, the environment risk of mining area is a very serious problem. And mining area environmental impact of a variety of uncertainties, from the engineering point of view can be divided into land pollution, water pollution, air pollution, noise pollution and solid waste pollution. In the paper, an evaluation index system of mining area risk is established by using the triangular fuzzy number...
The effects of pH on the hydrolysis and acidification from WAS in mesophilic and thermophilic anaerobic fermentation was investigated in this study. Both the mesophilic and thermophilic waste activated sludge (WAS) hydrolysis were improved significantly at alkaline pHs than at other pHs. Themophilic conditions improved the WAS hydrolysis compared to that mesophilic ones. The accumulation of short-chain...
Oily sludge, produced mostly in petroleum refineries and petrochemical industries, is one of the major industrial wastes that require treatment. The objective of this work was to recovery oil by washing of oily sludge with nonionic and anionic surfactant. To compare experimental results, three surfactants were used: sodium dodecylbenzene sulfonate (DBS), alkyl phenol polyoxyethylene ether (OP-10)...
In this paper, an apparatus of continuous flow solid-phase microextraction is described. Based on this apparatus, a method for the determination of 20 trace level organic chlorinated pesticides in the water was developed. The influence of various experiment conditions on the extraction efficiency of continuous flow solid phase microextraction for the organic chlorinated pesticides was studied. The...
Removal of as(V) and as(III) from water using hydrous cerie oxide, CeO2ldrxH2O (HCO) was investigated under different pH and As loading conditions, using batch equilibrium adsorption and FTIR methods. Adsorption of both As(V) and As(III) anions was virtually independent of pH and up to 100% removal can be achieved in the lower concentration range 0.5 - 5.0 mg L-1 As at sorbent dosage of 1.0 g L-1...
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