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对用4年生的雷竹竹秆在传统的竹材炭化窑中烧制获得的雷竹炭进行理化性质及其在Hg2+溶液中对Hg2+的吸附性能测试,结果表明:①雷竹炭的水分、灰分、挥发分、固定碳、pH等基本理化性能指标均达到《竹炭》(DB33/T467-2004)要求;②雷竹炭中K、Ca、Na、Mg元素的含量较高,其中钾含量最高,达11 730 mg/kg,Hg、Cd、Cr、Se等重金属未被检出,As、Pb、Co、Ni、Sr等重金属的含量均小于1 mg/kg;③雷竹炭对Hg2+具有较强的吸附性能,吸附率与雷竹炭的粒径,作用时间,HgCl2溶液的pH、浓度,雷竹炭用量,吸附温度等因素有关,在雷竹炭粒径为0.25～0.37 mm,添加量10 mg,处理温度35℃,pH6的条件下,对Hg2+的吸附率在96.0%以上。
The physical and chemical properties of the bamboo charcoal obtained from 4-year-old bamboo bamboo stalks calcined in a traditional bamboo carbonization kiln and its adsorption performance to Hg2 + in Hg2 + solution were tested. The results showed that: ① The bamboo charcoal moisture, ash, volatile The basic physical and chemical properties such as carbon, fixed carbon and pH reached the requirements of “bamboo charcoal” (DB33 / T467-2004). ② The contents of K, Ca, Na and Mg in bamboo charcoal were higher, of which the potassium content was the highest Heavy metals such as mg / kg, Hg, Cd, Cr and Se were not detected, and the contents of heavy metals such as As, Pb, Co, Ni and Sr were less than 1 mg / kg; The adsorption rate was related to the particle size, reaction time, the pH and concentration of HgCl2 solution, the amount of leached bamboo charcoal, the adsorption temperature and other factors. When the diameter of the bamboo charcoal was 0.25-0.37 mm, the dosage was 10 mg, the treatment temperature was 35 ℃, Under the condition of pH6, the adsorption rate of Hg2 + is over 96.0%.