摘要
选取贵州省某村煤、粉煤灰、土壤及农作物作为研究对象进行砷含量研究,并采用逐级化学提取法对粉煤灰进行形态分析.结果表明:该研究区煤、土壤及粉煤灰中砷含量均严重超标,普遍超出100mg/kg;粉煤灰中砷主要以残渣态存在(57%),其次是铁锰氧化物结合态(17.62%)、有机结合态(12.08%)、硫化物结合态(11.68%)、碳酸盐结合态(0.97%)、水溶态和可交换态(0.65%);研究区居民日常燃煤的砷排放量较大,每户日均排放量高达576.22 mg,排放率为48.07%,年均排放量达到0.21kg;高砷煤利用过程中砷已经对农作物造成了一定影响.
The arsenic content of coal, fly ash, soil and crop in a village of Guizhou Prov- ince was studied in this paper, and sequential chemical extraction method was used for fly ash. The results shows that the arsenic content of coal, soil and fly ash in the researched area are all serious excessive with the standard, generally exceeded 100 mg/kg. The arsenic in fly ash are mainly exist as residues state （57%）, the next are iron and manganese oxides combined state （17.62%）, arsenic in organic combined state （12.08%）, sulfide combined state （11.68%）, car- bonate combined state （0.97%）, and water soluble and exchangeable arsenic content （0.65%）. The arsenic emissions of resident＇s daily coal use are comparatively large, the daily average emis- sion of every family user reaches to 576.22 mg, the emission rate is 48.07%, the average annual emission is 0.21 kg. The utilization of high-As coal has caused serious problems on crops.
出处
《煤炭转化》
CAS
CSCD
北大核心
2012年第4期77-79,共3页
Coal Conversion
基金
国家自然科学基金资助项目(40703005
41073075)
河南省青年骨干教师基金资助项目
河南理工大学博士基金资助项目
关键词
高砷煤
土壤
粉煤灰
结合形态
high arsenic coal, soil, fly ash, combined forms
