Preparation of a modified flue gas desulphurization residue and its effect on pot sorghum growth and acidic soil amelioration
文献类型： 外文期刊
作者： Shi, Lin 1 ; Xu, Peizhi 2 ; Xie, Kaizhi 2 ; Tang, Shuanhu 2 ; Li, Yongli 1 ;
作者机构： 1.S China Univ Technol, Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Guangzhou 510006, Guangdong, Peoples R China
2.Guangdong Acad Agr, Inst Soil & Fertilizer, Guangzhou 510640, Guangdong, Peoples R China
关键词： modified flue gas desulphurization residue;amelioration;pot growth;acidic soil;sorghum
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）
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收录情况： SCI
摘要： A modified flue gas desulphurization residue (MFGDR) was prepared and its effects on sorghum growth and acidic soil amelioration were evaluated in this paper. The MFGDR was prepared by calcining a mixture of dry/semi-dry flue gas desulphurization (FGD) residue from a coal-fired power plant, sorted potash feldspar and/or limestone powder. The available nutrients from the MFGDR were determined with 4.91 wt% K-+, 1.15 wt% Mg-(2+), 22.4wt% Ca-(2+) 7.01 wt% Si-(4+) and 2.07 wt% SO_4-(2-)-S in 0.1 mol L-(-1) citric acid solution. Its pH value was held at 9.60 displaying slightly alkaline. The results of sorghum pot growth in both red and crimson acidic soil for 30 days indicated that adding the MFGDR at a dosage of 2 g kg-(-1) in total soil weight would increase the growth rate of biomass by 24.3-149% (wet weight basis) and 47.3-157% (dry weight), the stem length and thickness increase by 5.75-22.1% and 4.76-30.9% in con trast with CK treatment for two test cuttings, respectively. The effect on sorghum growth was attributed to the increase of available nutrients, the enhancement of soil pH value and the reduction of aluminum toxicity in acidic soil due to the addition of the MFGDR. The experimental results also suggested that the MFGDR could be effectively used to ameliorate the acidic soil which is widely distributed throughout the southern China.
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