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Adsorption of some toxic elements from water samples on modified activated carbon, activated carbon and red soil using neutron activation analysis

机译：用中子活化分析法将水样中的某些有毒元素吸附在改性活性炭，活性炭和红壤上

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摘要

A simple and sensitive method for the determination of some metalloids and heavy metals in water samples is presented. The method is based on the preconcentration of the attachment of chelating functionalities with metalloids and toxic metals irreversibly and targeted towards toxic metals adsorbed on modified activated carbon, activated carbon and red soil particles at pH 3.0–9.0±0.2, followed by quantitative determination using instrumental neutron activation analysis (INAA), on the absorbers. Attachment results from attraction that may be physical, chemical, electrical, or a combination of all three. The efficient removal of metalloids and toxic metals, especially arsenic, chromium and mercury is anticipated. The adsorption capacity of the chemically modified activated carbon materials was evaluated for the above mentioned metalloid and toxic metal ions in the presence of iron ions and simulated water samples. Red soil particles containing iron was utilized in the control of oxidation-reduction reaction with metalloids and toxic metals. The preconcentration of the elements of interest on red soil particles, activated carbon and modified activated carbon at different depths, pH and oxidation states was investigated. The results obtained showed good agreement with certified values giving relative errors of less than 10%.
机译：提出了一种简单而灵敏的测定水样中某些准金属和重金属的方法。该方法是基于螯合功能与准金属和有毒金属的不可逆结合的预浓缩，并针对吸附在pH 3.0至9.0±0.2的改性活性炭，活性炭和红壤颗粒上的有毒金属，然后进行定量使用仪器中子活化分析（INAA）对吸收剂进行测定。附着是由于吸引力而产生的，吸引力可能是物理的，化学的，电气的或这三者的组合。预计将有效去除准金属和有毒金属，尤其是砷，铬和汞。在铁离子和模拟水样存在下，对上述类金属和有毒金属离子的化学改性活性炭材料的吸附能力进行了评估。含铁的红土颗粒被用于控制与准金属和有毒金属的氧化还原反应。研究了目标元素在不同深度，pH和氧化态下在红壤颗粒，活性炭和改性活性炭上的预富集情况。所获得的结果与认证值吻合良好，相对误差小于10％。

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