氮磷肥对褐土吸附土霉素的影响  

Effect of N, P fertilizers on adsorption of oxytetracycline to cinnamon soil

作　　者：刘斌[1] 鲍艳宇[1] 周启星[1] 张承东[1] 

机构地区：[1]南开大学环境科学与工程学院,教育部环境污染过程与基准重点实验室,天津市城市生态环境修复与污染防治重点实验室,天津300071

出　　处：《中国环境科学》2014年第8期2057-2062,共6页China Environmental Science

基　　金：国家自然基金重点项目(21037002);天津市自然基金(13JCQNJC09000);天津市自然基金重点项目(13JCZDJC35900)

摘　　要：为了了解不同氮磷肥对褐土吸附土霉素的影响,将OECD Guideline 106作为参考方法,并选用NH4Cl,CO（NH2）2,Ca（NO3）2及Ca（H2PO4）2四种常用的农业化肥作为影响因素,进行等温吸附试验.结果表明,氮磷肥添加过后,吸附等温线依然可用Langmuir和Freundlich方程拟合（P〈0.01）.在添加4种化肥情况下,土壤悬浮液的pH值及阳离子强度都在一定程度上发生了变化,相比于对照,pH值变化范围为0.04∽0.24,褐土对土霉素的饱和吸附量（Qmax）顺序为：Ca（NO3）2〉NH4Cl〉CK〉Ca（H2PO4）2〉CO（NH2）2,而在吸附率和分配系数方面影响最大的则是CO（NH2）2,数值平均下降了2.43%,13.19%,最小的则是Ca（H2PO4）2,其值平均下降了1.75%,9.59%.The OECD Guideline 106 was selected as reference method, in purpose of investigating the effect of nitrogen-containing and phosphorus-containing fertilizers on adsorption of OTC in cinnamon soil. In addition, ammonium chloride, urea, calcium nitrate and triple superphosphate were employed as treatment factors. The isothermal adsorption test showed that data could be fitted very well （P〈0.01） in the presence of fertilizers. The pH and cationic strength of soil suspension have undergone a certain degree of change and the pH ranged from 0.04 to 0.24. The adsorption capacity order was as followed： Ca（NO3）2〉NH4Cl〉CK〉Ca（H2PO4）2〉CO（NH2）2. In terms of adsorption rate and distribution coefficient, CO（NH2）2 gave rise to the most significant influence which decreased by 2.43%, 13.19% averagely, and Ca（H2PO4）2 led to the least significant influence which lowered by 1.75%, 9.59%.

关 键 词：氮磷肥 褐土 吸附 土霉素 

分 类 号：X53[环境科学与工程—环境工程]