Activated carbon has been proven to be an effective adsorbent for the recovery of a wide variety of metal ions from aqueous solutions. In this research, the activated hard shell of Iranian apricot stones was used for ...Activated carbon has been proven to be an effective adsorbent for the recovery of a wide variety of metal ions from aqueous solutions. In this research, the activated hard shell of Iranian apricot stones was used for gold recovery from electro-plating wastewater. The effect of parameters such as dose and particle size of adsorbent,pH, agitation speed of mixing on the gold recovery was investigated. The results showed that under the optimum operating conditions more than 98% of gold ions were adsorbed onto activated carbon after just 3 h. In addition, the adsorbed gold could be eluted from this adsorbent by improved striping method. The process involves contact of gold-laden adsorbent with a strong base at ambient temperatures followed by elution with an aqueous solution containing an organic solvent. It was found that activated hard shell of apricot stones has the potential to replace im ported commercial activated carbons in gold adsorption processes.展开更多
探讨了在编著《中国梅花品种图志.中英双语增订版》时,为解决与国际接轨而遇到的先决问题。经钻研《国际栽培植物命名法规》(第7版)后,在梅种之下将品种分为3个品种群,即:①真梅品种群True Mume Group,②杏梅品种群Apricot Mei Group,...探讨了在编著《中国梅花品种图志.中英双语增订版》时,为解决与国际接轨而遇到的先决问题。经钻研《国际栽培植物命名法规》(第7版)后,在梅种之下将品种分为3个品种群,即:①真梅品种群True Mume Group,②杏梅品种群Apricot Mei Group,③樱李梅品种群Blireiana Group。品种群以下,则不再分类、型等级别。而将二元分类法的内涵,融入品种名称之中。不同意樱李梅用独立的杂种学名Prunus×blireiana,也不同意把杏梅提升为独立的种名Prunus×bungo。樱李梅和杏梅还都应列在梅种之下,因三者之内果皮表面均具蜂窝状点穴——此乃梅、杏、李鉴别分类中的最关键性状,必须首先考虑,不能与其他性状等量齐观。展开更多
文摘Activated carbon has been proven to be an effective adsorbent for the recovery of a wide variety of metal ions from aqueous solutions. In this research, the activated hard shell of Iranian apricot stones was used for gold recovery from electro-plating wastewater. The effect of parameters such as dose and particle size of adsorbent,pH, agitation speed of mixing on the gold recovery was investigated. The results showed that under the optimum operating conditions more than 98% of gold ions were adsorbed onto activated carbon after just 3 h. In addition, the adsorbed gold could be eluted from this adsorbent by improved striping method. The process involves contact of gold-laden adsorbent with a strong base at ambient temperatures followed by elution with an aqueous solution containing an organic solvent. It was found that activated hard shell of apricot stones has the potential to replace im ported commercial activated carbons in gold adsorption processes.