滩涂围垦淋洗脱盐过程对土壤中几种不同形态硫的影响  

Effect of Tidal Flat Reclamation and Leaching Desalination on Several Different Forms of Sulphur in the Soil

作　　者：陆君[1] 李取生[1] 杜烨锋[1] 刘亚男[1] 

机构地区：[1]暨南大学环境工程系,水土环境毒害性污染物防治与生物修复广东省高校重点实验室,广东广州510632

出　　处：《华南师范大学学报（自然科学版）》2012年第2期95-98,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(40871154,U0833002);广东省自然科学基金项目(07005931)

摘　　要：用蒸馏水对其进行淋洗,以珠江口湿地滩涂土壤,使土壤表层盐分含量低于0.2%.实验设置8个脱盐梯度,对滩涂土壤在不同淋洗脱盐阶段,不同深度的全硫、水溶性硫、酸可挥发性硫进行分析.结果表明:随着淋洗脱盐过程的进行,土壤全硫含量呈递减的趋势,在这个过程中无机硫下降了40%,有机硫下降了30%;水溶性硫含量亦呈递减的趋势;淋洗后,土壤的酸可挥发性硫含量较淋洗前均增加,但各处理间酸可挥发性硫含量的差异随淋洗过程的进行逐渐减少,主要受土壤氧化还原电位影响.Spearman相关分析表明各土层不同处理土壤氧化还原电位与酸可挥发性硫呈显著性负相关关系(r=-0.733～0.933,P<0.01).The coastal tidal flat of the Pearl River estuary which was leached by distilled water to make the salt con- tents less than 0.2% was taken as the object of our study. Eight desalination levels were set to analyze the total sul- phur, water - soluble sulphur and acid - volatile sulphur in the costal tidal flat during different leaching desalination stages in different depth. The results show that, the coneents of the total sulphur decreased in the process of leac- hing desalination during which the inorganic and organic sulphur decreased 40% and 30% , respectively; the con- cents of the water - soluble sulphur also went down in this process ; the contents of the acid - volatile sulphur were higher than the original contents after leaching, but the difference among the eight treatments along with the leac- hing process reduced gradually, owning to the impact of Eh in the soil, according to the Spearman relationship a- nalysis, there was very remarkable negative correlation （r = - 0. 733-0.933, P 〈 0.01） between the redox potential and the acid -volatile sulphur content within different treatments.

关 键 词：淋洗脱盐 全硫 水溶性硫 酸可挥发性硫 

分 类 号：X53[环境科学与工程—环境工程]