Adsorption of high ammonium nitrogen from wastewater using a novel ceramic adsorbent and the evaluation of the ammonium-adsorbed-ceramic as fertilizer.
Adsorption of high ammonium nitrogen from wastewater using a novel ceramic adsorbent and the evaluation of the ammonium-adsorbed-ceramic as fertilizer.
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DOI：
10.1016/j.jcis.2012.10.028
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发表时间：
2013-03
影响因子：
9.9
通讯作者：
Yingxin Zhao;Yingnan Yang;Shengjiong Yang;Qinghong Wang;Chuanping Feng;Zhenya Zhang
中科院分区：
文献类型：
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作者：
Yingxin Zhao;Yingnan Yang;Shengjiong Yang;Qinghong Wang;Chuanping Feng;Zhenya Zhang
研制了一种新型陶瓷吸附剂，用于吸附高浓度氨氮废水中的氨氮。以日本典型的园艺栽培基质-鹿沼粘土和赤玉粘土为原料合成陶瓷吸附剂。静态批实验进行了调查的各种参数，如接触时间，初始铵浓度，吸附剂用量，和竞争阳离子在铵吸附过程中的效果。结果表明，Freundlich吸附等温线模型较Langmuir吸附等温线模型更符合吸附过程，吸附过程符合准二级动力学模型。在初始NH 4 +-N浓度为10，000 mgL-1、投加量为20 gL-1、吸附时间为480 min时，陶瓷吸附剂的最大氮吸附量为75.5mgg-1。结果表明，该陶瓷吸附剂成本低，铵态氮含量高，对环境无毒，土壤性质优良，直接用作氮肥是可行的。
A novel ceramic adsorbent was developed to adsorb ammonium from high concentration ammonium contaminated wastewater. Typical gardening cultivation mediums in Japan—Kanuma clay and Akadama clay were used to synthesize the ceramic adsorbent. Static batch experiments were conducted to investigate the effect of various parameters such as contact time, initial ammonium concentration, adsorbent dosage, and competing cations during the ammonium adsorption process. The results revealed that the Freundlich isotherm model fitted better with the adsorption process than the Langmuir model, and the adsorption process was well described by pseudo-second-order kinetic model. The maximum nitrogen adsorption capacity of the ceramic adsorbent was 75.5mgg−1at an initial NH4+–N concentration of 10,000mgL−1, dosage of 20gL−1, and contact time of 480min. Results demonstrated that the low-cost ceramic adsorbent directly used as nitrogen fertilizer was feasible for its high ammonium nitrogen content, nontoxic effect on the environment and excellent soil properties.