CAJ | 학술논문

通过黄原酸化反应将二硫代氨基甲酸（DTC）基团引入至壳聚糖，制备DTC类重金属捕集剂，用以去除猪场废水Cu、Zn。结果表明，DTC类重金属捕集剂对Cu、Zn的捕集性能受废水初始pH值和捕集剂投加量的影响，pH值有一个适宜范围，即pH 3.0~5.0；随着捕集剂投加量的增加，去除效果逐渐增加，但增加速率逐渐减缓。捕集剂性能受进水Cu、Zn浓度以及废水温度的干扰不很明显。在废水pH值5.0，捕集剂投加量2.0 g·L-1（废水），初始Cu、Zn浓度25~200 mg·L-1时，捕集剂对Cu、Zn的去除率可达到99%以上，且处理后Cu、Zn浓度低于污水综合排放标准（GB 8978—1996）一级标准限值规定。DTC类重金属捕集剂对Cu、Zn的等温吸附特征可用Langmuir方程进行拟合，其吸附平衡时间约为20 min左右。
통과황원산화반응장이류대안기갑산（DTC）기단인입지각취당，제비DTC류중금속포집제，용이거제저장폐수Cu、Zn。결과표명，DTC류중금속포집제대Cu、Zn적포집성능수폐수초시pH치화포집제투가량적영향，pH치유일개괄의범위，즉pH 3.0~5.0；수착포집제투가량적증가，거제효과축점증가，단증가속솔축점감완。포집제성능수진수Cu、Zn농도이급폐수온도적간우불흔명현。재폐수pH치5.0，포집제투가량2.0 g·L-1（폐수），초시Cu、Zn농도25~200 mg·L-1시，포집제대Cu、Zn적거제솔가체도99%이상，차처리후Cu、Zn농도저우오수종합배방표준（GB 8978—1996）일급표준한치규정。DTC류중금속포집제대Cu、Zn적등온흡부특정가용Langmuir방정진행의합，기흡부평형시간약위20 min좌우。
The dithiocarbamate chelator(DTC)was prepared to remove Cu, Zn from swine wastewater by xanthic acid reaction of linking DTC-groups into chitosan. The results showed that the removal efficiency with DTC chelator was affected by initial pH value and the chelator amount added but had little affection from the initial concentration of Cu, Zn and temperature. The pH value had a suitable range from 3.0 to 5.0, and the removal efficiency gradually increased with DTC amount, but the increasing rate slowed down gradually. When the pH value was about 5, the added chelator amount was 2.0 g·L-1(wasterwater), the initial concentrations of both Cu and Zn were 25~200 mg·L-1, the removal efficiency of Cu and Zn reached to 99%, and the concentrations of Cu and Zn in effluent were lower than those stipulated in the national standard(GB 8978—1996). Langmuir equation could well describe the isothermal adsorption process, and the equilibrium time was deter-mined as 20 minutes by the kinetic process.