CAJ | 학술논문

为有效抑制底泥中磷的释放,进而控制富营养化水体蓝藻水华,提出以镧改性膨润土(Phoslock溎)为修复材料的底泥原位修复技术.通过多因素作用下的静态、动态模拟试验,同时结合现场水体治理工程的实际应用及跟踪监测,首次分析、研究镧改性膨润土的应用对底泥中不同形态磷转化和固化的效果以及对控制水体富营养化的贡献,为类似富营养化水体污染的防治提供理论依据.结果表明,Phoslock溎用量为0畅5 kg/m 2时,上覆水中正磷酸盐质量浓度在10 d内降至0畅02 mg/L,即使在厌氧和高pH值(pH=9畅0)条件下,底泥抑磷率也能达到98畅3%,底泥释磷速率为-8畅20 mg/(m 2? d)(负值代表Phoslock溎对磷的吸附),底泥中的活性磷逐渐被惰性化为稳定态磷,现场监测结果与室内模拟试验取得的结论一致.
위유효억제저니중린적석방,진이공제부영양화수체람조수화,제출이란개성팽윤토(Phoslock연)위수복재료적저니원위수복기술.통과다인소작용하적정태、동태모의시험,동시결합현장수체치리공정적실제응용급근종감측,수차분석、연구란개성팽윤토적응용대저니중불동형태린전화화고화적효과이급대공제수체부영양화적공헌,위유사부영양화수체오염적방치제공이론의거.결과표명,Phoslock연용량위0창5 kg/m 2시,상복수중정린산염질량농도재10 d내강지0창02 mg/L,즉사재염양화고pH치(pH=9창0)조건하,저니억린솔야능체도98창3%,저니석린속솔위-8창20 mg/(m 2? d)(부치대표Phoslock연대린적흡부),저니중적활성린축점피타성화위은정태린,현장감측결과여실내모의시험취득적결론일치.
@@@@To effectively control phosphorus release from sediments and blue-green algal blooms in eutrophic water bodies, in situ control technology with lanthanum-modified bentonite clay (Phoslock?) was chosen as a method and its effectiveness was tested and evaluated through laboratory and field trials .This study, the first of its kind, was conducted to monitor and analyze the transformation of different forms of phosphorus in sediments after in situ treatment.The results of static and dynamic simulation experiments under different environmental conditions showed that with an application rate of Phoslock? of 0.5 kg/m 2 , the orthophosphate ( PO 3-4 -P) concentration of the overlying water decreased to 0.02 mg/L within ten days.Even under anaerobic and high pH ( pH =9.0 ) conditions, the phosphate release suppression efficiency reached 98.3%, and the phosphorus release rate was -8.20 mg/(m 2? d) (a negative value indicates phosphorus adsorption by Phoslock?).Moreover, the proportion of bio-available phosphorus (BAP) in sediments was reduced , a majority of which was transformed into non-reactive species.The field monitoring data in the sediment rehabilitation project were consistent with the results achieved in laboratory experiments.