文献类型：期刊文献

英文题名：Adsorption of ammonia nitrogen in aqueous solution by the acid activated water treatment sludge

作者：Xiong, Shuiying[1];Qiu, Muqing[2];Wang, Gusheng[1]

机构：[1]Shaoxing Univ, Yuanpei Coll, Dept Life Sci, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Life Sci, Shaoxing 312000, Peoples R China

年份：2016

卷号：19

期号：3-4

起止页码：268

外文期刊名：INTERNATIONAL JOURNAL OF ENVIRONMENTAL TECHNOLOGY AND MANAGEMENT

收录：EI(收录号：20170803363095)、ESCI(收录号：WOS:000395300900006)、Scopus(收录号：2-s2.0-85013013350)、WOS

基金：This study was financially supported by the project of science and technology plan in Shaoxing City (2013B70050 and 2014B70050) and National Science Foundation of China (No. 31500321).

语种：英文

外文关键词：ammonia nitrogen; acid; water treatment sludge; adsorption isotherm; adsorption kinetic

外文摘要：The ammonia nitrogen in aqueous solution can contribute to the eutrophication of water bodies, depletion of dissolved oxygen and toxicity to fish and other aquatic organisms. The removal of ammonia nitrogen in aqueous solution was carried out with many kinds of methods. In this research, the potential and effectiveness of the water treatment sludge was studied as the alternative adsorbents for the removal of ammonia nitrogen in aqueous solution. The water treatment sludge was activated by acid solution. Then, the effects of temperature, contact time and initial ammonia nitrogen concentration on ammonia nitrogen adsorption by the acid activated water treatment sludge were investigated. The results showed that the acid activated water treatment sludge contains porous structures and high surface area. The equilibrium data fitted with the Langmuir isotherm. The adsorption data fitted the pseudo-second-order model much better with R-2 greater than the pseudo-first-order model. The values of Delta H-0 and Delta S-0 were -34.28 kJ/mol and -113.09 J/mol, respectively. The value Delta G(0) of was 0.41 kJ/mol at 308 K.