Lo H M, Lin K C, Liu M H, Pai T Z, Lin C Y, Liu W F, Fang G C, Lu C, Chiang C F, Wang S C, Chen P H, Chen J K, Chiu H Y, Wu K C
Department of Environmental Engineering and Management, Chaoyang University of Technology, 168 Gifong E. Road, Wufong, Taichung County 41349, Taiwan, ROC.
J Hazard Mater. 2009 Jan 15;161(1):294-9. doi: 10.1016/j.jhazmat.2008.03.119. Epub 2008 Apr 8.
This paper aims to investigate the six heavy metal levels (Cd, Cr, Cu, Pb, Ni and Zn) in municipal solid waste (MSW) at different pHs. It intends to provide the baseline information of metals solubility in MSW co-disposed or co-digested with MSW incinerator ashes in landfill or anaerobic bioreactors or heavy metals contaminated in anaerobic digesters. One milliliter (equal to 1mg) of each metal was added to the 100ml MSW and the batch reactor test was carried out. The results showed that higher HNO3 and NaOH were consumed at extreme pH of 1 and 13 compared to those from pH 2 to 11 due to the comparably higher buffer capacity. Pb was found to have the least soluble level, highest metal adsorption (%) and highest partitioning Kd (lg(-1)) between pH 3 and 12. In contrast, Ni showed the highest soluble level, lowest metal adsorption (%) and lowest Kd (lg(-1)) between pH 4 and 12. Except Ni and Cr, other four metals seemed to show the amphibious properties as comparative higher solubility was found in the acidic and basic conditions.
本文旨在研究不同pH值下城市固体废物（MSW）中六种重金属（镉、铬、铜、铅、镍和锌）的含量。旨在提供与垃圾焚烧炉灰渣共处置或在填埋场或厌氧生物反应器中共消化的城市固体废物中金属溶解度的基线信息，或厌氧消化器中重金属污染的基线信息。向100ml城市固体废物中添加1毫升（相当于1mg）的每种金属，并进行间歇式反应器试验。结果表明，与pH值为2至11时相比，在极端pH值1和13时消耗的硝酸和氢氧化钠更多，这是由于缓冲能力相对较高。发现在pH值3至12之间，铅的溶解度最低，金属吸附率最高，分配系数Kd（lg(-1)）最高。相比之下，在pH值4至12之间，镍的溶解度最高，金属吸附率最低，Kd（lg(-1)）最低。除镍和铬外，其他四种金属似乎具有两性性质，因为在酸性和碱性条件下发现其溶解度相对较高。
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