期刊论文

Study on the Synergistic Regulation of Ca_xCd_(1-x)CO_3 by Chitosan-Fulvic Acid

中文

环境科学与技术

1003-6504

2019

42

4

130-135

10.19672/j.cnki.1003-6504.2019.04.019

21607176:国家自然科学基金 2017JJ3516:湖南省自然科学基金 16B274:湖南省教育厅优秀青年项目 2016ZD11:中南林业科技大学林学重点学科开放基金项目

本校为第一机构

以壳聚糖和富里酸混合溶液为介质,利用碳酸铵气相扩散法合成Ca_xCd_(1-x)CO_3固溶体,文章研究了Ca_xCd_(1-x)CO_3固溶体成核结晶行为,探究这2种介质对于Ca_xCd_(1-x)CO_3固溶体固化Cd能力及稳定性的影响。通过结晶固相成分分析,结果表明液相中各组分浓度能够影响固相中Cd的含量。液相Cd~(2+)浓度增加,Cd在固溶体中的含量也增加。随着富里酸浓度增加,固溶体中Cd含量降低,意味着在富里酸存在下固溶体固化Cd能力降低。红外光谱和XRD结果证明了壳聚糖和富里酸不影响固溶体晶体的结构。扫描电镜和透射电镜分析进一步表明,壳聚糖和富里酸在不同程度上都影响了固溶体的晶体形貌及固相组成。在壳聚糖存在...

Ca_xCd_(1-x)CO_3 solid solution was synthesized in the mixed media of chitosan and fulvic acid by the ammonium car-bonate gaseous diffusion method. Further, effects of two media for some aspects of Ca_xCd_(1-x)CO_3 solid solution including its nu-cleation behavior, solidifying Cd ability and stability were investigated. The results of composition analysis in solid phase show that Cd contents in solid phase can be relative with the composition in aqueous phase. The higher the Cd concentration is in aqueous phase, the higher the Cd content is in solid phase. However, with the increasing concentr...