高砷土壤應用固化法配合活性碳添加以達到減低毒性特性溶出之研究

Stabilization/Solidification of Arsenic-Contaiminated Soil with Cement and Activated Carbon

謝運行(Yun-Shin Hsieh)

指導教授 ： 張添晉 ； 席行正

國立臺北科技大學/工程學院/環境工程與管理研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00343

摘要

本研究藉由固化穩定化配合含浸不同材質之活性碳處理高砷污染之土樣，藉由不同參配比以觀察其經過TCLP溶出試驗，探討高砷土樣固化後重金屬濃度之溶出行為特性。研究結果顯示，超標重金屬砷、汞、銅與鉻經過固化處理後僅有砷仍無法達到標準，而其他重金屬皆能符合TCLP溶出試驗之標準濃度。本研究並進一步藉由溶出百分比以觀察各參數之影響，其結果顯示含溴化鈉活性碳與含硫活性碳添加比越高，會導致土樣中之砷與鎳含量逐漸被活性碳所吸附，且活性碳添加比超過5%即會造成固化體崩解之現象。於溶出成效即可發現，砷與鎳等重金屬雖在同樣參配比之狀況下，養護時間7天之溶出百分比卻低於養護時間28天之效果。另本研究發現添加含溴化鈉活性碳對鉛之抑制效果相當出色，且藉由降低水泥參配比而提升活性碳參配比，其效果越好。而添加含硫活性碳對鉛、鋅與銅之處理效果亦相當出色，水泥參配比20%之狀況下搭配5%、10%或15%之活性碳，經過養護時間28天時便可抑制鋅與銅之溶出百分比達到5%與0.5%以下。

關鍵字

砷 ； 重金屬 ； 活性碳 ； 固化/穩定化 ； 毒性特性溶出試驗(TCLP)

並列摘要

This study aims to investigate the leaching characteristics of heavy metal concentrations both by the stabilization with the impregnation of different materials of activated carbon to deal with high arsenic contamination of soil samples, and by observing different parameters ratio after the TCLP leaching test in the high arsenic soil samples. The results show that excessive heavy metals, such as mercury, copper and chromium after being cured can satisfy the standard concentration of the TCLP leaching test, only arsenic can’t meet the standard. On the other hand, this study observes the effects of each parameter via the dissolution percentage. Study results showed that sodium bromide and sulfur content added with higher activated carbon will cause both arsenic and nickel to be greatly adsorbed by activated carbon from soil samples. Furthermore, activated carbon added more than 5% will result in the collapse of the solidification. From dissolution of the effectiveness of heavy metals such as arsenic and nickel in the same condition parameter ratio, we also found dissolution percentage of 7-day maintenance time was even lower than that of 28-day. This study further found that the suppression effect of containing sodium bromide activated carbon to lead is fantastic. The effect will be even better if reducing cement parameters ratio and enhancing activated carbon parameter ratio. Meanwhile, the effect of adding sulfur-containing activated carbon into zinc and copper is awesome too, especially while 20% cement parameters ratio, combined with 5%, 10% or 15% activated carbon for 28-day maintenance can inhibit zinc and copper dissolution percentage below 5% and 0.5%.

並列關鍵字

Arsenic ； heavy metals ； activated carbon ； solidification ； TCLP

參考文獻

蘇宏仁，台灣地區砷之物質流分析，碩士論文，國立臺灣大學工學院環境工程學研究所，台北，2009年。

經濟部工業局，工廠土壤及地下水污染整治技術手冊-石化業，2003年。

劉凡碩、簡志洪、李育明，土壤與地下水污染整治基金管理與整治技術，2005年1月。

白慧芬，國內污染土壤離場處理管理策略之研析，碩士論文，國立中央大學環境工程研究所，中壢，2011年。

Chen, Q. Y., Tyrer, M., Hills, C. D., Yang, X. M., Carey, P., “Immobilisation of heavy metal in cement-based solidification/stabilization: A review,” Waste Management, vol. 29, 2009, pp. 390-403.