Emission control for precursors causing acid rain (V): Improvement of acid soil with the bio-briquette combustion ash

编号 zgly0000350172

文献类型 期刊论文

文献题名 Emission control for precursors causing acid rain (V): Improvement of acid soil with the bio-briquette combustion ash

作者 DONGXu-hui  SAKAMOTOKazuhiko  WANGWei  GAOShi-dong  ISOBEYugo 

作者单位 Sino-JapaneseFriendshipCenterforEnvironmentalProtection  GraduateSchoolofScience＆Engineering  InstituteforEnvironmentalStudiesofChina  ChongqingEnvironmentalProtectionBureau 

母体文献 Journal of Environmental Sciences;环境科学学报: 英文版 

年卷期 2004,16(5)

页码 705-711

年份 2004 

分类号 X517 

关键词 酸雨  大气污染  煤饼  飞灰  环境保护 

文摘内容 The bio-briquette technique which mixes coal, biomass and sulfur fixation agent and bio-briquettes under 3-5 t/cm^2 line pressure has aroused people's attention in view of controlling the air pollution and the acid rain. In this paper, the physicochemical properties of bio-briquette and its ash were investigated. And the acid soil was improved by the bio-briquette combustion ash, which contained nutritive substances such as P, N, K and had the acid-neutralizing capacity(ANC). The pH, EC, effective nutrient elements(Ca, Mg, K, P and N), heavy metal elements(AI, Cu, Cd, Cr, Zn and Mn) and acid-neutralizing capacity change of ash-added soils within the range of 0-10%, were also studied. Specially, when 5% bio-briquette combustion ash was added to the tested soil, the content of the effective elements such as Ca, Mg and K rose by 100 times, ? times and twice, respectively. The total nitrogen also increased by about twice. The results showed the oxyanions such as that of AI, Cu, Cd, Cr, Zn and Mn were not potentially dangerous, because they were about the same as the averages of them in Chinese soil. It is shown that the ANC became stronger, though the ANC hardly increases in the ash-added soil. On the basis of the evaluation indices, it is concluded that the best mixture ratio is to add 2.5%--8% of the bio-briquette combustion ash to the tested soil。