当前位置: X-MOL 学术Environ. Sci. Pollut. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Comparison of capping and mixing of calcined dolomite and zeolite for interrupting the release of nutrients from contaminated lake sediment.
Environmental Science and Pollution Research ( IF 5.8 ) Pub Date : 2020-02-17 , DOI: 10.1007/s11356-020-08058-y
Jesteen Naldo Alvarado 1 , Seung-Hee Hong 2 , Chang-Gu Lee 3 , Seong-Jik Park 4
Affiliation  

This study aimed to assess the effectiveness of capping and mixing of calcined dolomite and zeolite for the remediation of sediment contaminated with nitrogen (N) and phosphorus (P). Laboratory incubation experiments were performed to monitor the release of NH4-N, NO3-N, T-N, PO4-P, and T-P from the sediment. pH, electric conductivity (EC), oxidation reduction potential (ORP), and dissolved oxygen (DO) in overlying water for 60 days were evaluated. Dolomite-amended sediment has high pH and EC. Zeolite and dolomite capping effectively interrupted the release of N and P, respectively; capping was found to be more effective than mixing. The mixture of dolomite and zeolite was also effective; however, their efficiencies were influenced by their placement. The remediation efficiencies when the dolomite was placed above the zeolite cap layer (DOL/ZEO_CAP) were 95.9%, 101.6%, and 100.2% for NH4-N, PO4-P, and total, and the total remediation efficiency of DOL/ZEO_CAP was twice that of the opposite placement (ZEO/DOL_CAP). Low remediation efficiencies for NH4-N and T-N were observed in ZEO/DOL_CAP because NH4+ adsorption on zeolite was hindered by Ca2+ and Mg2+ released from the dolomite. The combination of dolomite and zeolite can be used as a capping material for simultaneously interrupting the release of both nitrogen and phosphorus, but their placement should be considered.

中文翻译:

加盖和混合煅烧白云石和沸石以中断从受污染的湖泊沉积物中释放养分的比较。

这项研究的目的是评估加盖和混合煅烧白云石和沸石对补救被氮(N)和磷(P)污染的沉积物的有效性。进行实验室温育实验以监测沉积物中NH4-N,NO3-N,TN,PO4-P和TP的释放。评估了60天内上水的pH值,电导率(EC),氧化还原电位(ORP)和溶解氧(DO)。白云石修饰的沉积物具有较高的pH和EC。沸石和白云石的封端有效地分别中断了N和P的释放。发现封盖比混合更有效。白云石和沸石的混合物也是有效的。但是,它们的效率受它们放置的影响。将白云石放在沸石覆盖层上方时的修复效率(DOL / ZEO_CAP)为NH4-N,PO4-P和总的修复效率分别为95.9%,101.6%和100.2%,而DOL / ZEO_CAP的总修复效率为相对位置(ZEO / DOL_CAP)的两倍。在ZEO / DOL_CAP中观察到NH4-N和TN的修复效率较低,因为从白云石释放的Ca2 +和Mg2 +阻碍了NH4 +在沸石上的吸附。白云石和沸石的组合可以用作封盖材料,以同时中断氮和磷的释放,但应考虑它们的放置。在ZEO / DOL_CAP中观察到NH4-N和TN的修复效率较低,因为从白云石释放的Ca2 +和Mg2 +阻碍了NH4 +在沸石上的吸附。白云石和沸石的组合可以用作封盖材料,以同时中断氮和磷的释放,但应考虑它们的放置。在ZEO / DOL_CAP中观察到NH4-N和TN的修复效率较低,因为从白云石释放的Ca2 +和Mg2 +阻碍了NH4 +在沸石上的吸附。白云石和沸石的组合可以用作封盖材料,以同时中断氮和磷的释放,但应考虑它们的放置。
更新日期:2020-02-18
down
wechat
bug