The reuse of pulp and paper mill sludge: as a soil amendment

文献类型： 外文期刊

第一作者： Liu, Bei Bei

作者： Liu, Bei Bei;Chen, Xin;Wu, Lin;Chen, Miao;Zhou, Kai Bo;Peng, Li Xu

作者机构：

关键词： Paper mill;Sludge;Carbonization;Soil amendment

期刊名称：PROCEEDINGS OF THE 2015 INTERNATIONAL FORUM ON ENERGY, ENVIRONMENT SCIENCE AND MATERIALS

ISSN： 2352-5401

年卷期： 2015 年 40 卷

页码：

收录情况： SCI

摘要： The pulp and paper mill sludge emissions generate a considerable amount of pollutants. Paper mill sludge is high in organic matters which could be used in agriculture as a soil amendment. In this study, a carbonization method for paper mill sludge was established and the effects of carbonized sludge on wheat growth were determined. The results showed that the optimized carbonization conditions were using 0.1mol/L sulfuric acid to neutralize the sludge, and then carbonized at 300 degrees C, 0.5 h. The carbonized products were loose and porous. The results of pot experiment showed that when the amount of added carbonized sludge were 1% to 4% of the soils, with the increase of added carbonized sludge, the growth and plant weight were increased. The greatest wheat weight was obtained at the rates of 3%. The amount of Pb, Cd, Cr, Cu, Zn in soils did not exceed the safe controlling standards, the soil bulk density decreased, and the amount of the nutritional constituent such as N, P, and organic matter increased correspondently. So the soil qualities were improved after adding the carbonized sludge. This study indicated that carbonized paper sludge used as a soil amendment not only did not cause soil pollution but also improved the soil qualities, and then increased the plant growth when the amount of sludge applied on soil was proper.

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