PDF(Pubmed)
Abstract：
The goal of taking out As(III) from water is to reduce the detriment that poisonous metals can do to people and nature. A substance that can absorb As(III), TFPOTDB-SO3H, was made by combining 2,5-diaminobenzenesulfonic acid and 2,4,6-tris-(4-formylphenoxy)-1,3,5-triazine in a reaction that joins molecules together. This substance can adsorb As(III) very well and has excellent qualities like being easy to use again, separate substances, and filter out liquids. At pH = 8 and at room temperature, TFPOTDB-SO3H adsorbed a lot of As(III). It achieved a removal rate of 97.1 % within 10 min and could adsorb up to 344.8 mg/g. A research was conducted to investigate the effect of co-existing anions on the elimination of arsenic. The findings indicated that the presence of anions had a minimal adverse impact, reducing As(III) uptake by approximately 1-7 %. The kinetics of the uptake process were found to be controlled by the quasi-second order kinetic model, while the Langmuir isotherm model validated that the mechanism for As(III) removal was monolayer chemisorption. According to the thermodynamic analysis, the adsorption process was endothermic and occurred spontaneously. Moreover, even after 4 successive adsorption-desorption cycles, the adsorbent preserved a substantial uptake productivity of 88.86 % for As(III). The results collectively indicate that TFPOTDB-SO3H holds considerable promise for the efficient adsorption and elimination of As(III) ions from wastewater.
摘要：
从水中取出As（III）的目的是减少有毒金属对人类和自然造成的损害。一种能吸收As（III）的物质，TFPOTDB-SO3H,是通过将2,5-二氨基苯磺酸和2,4,6-三-（4-甲酰基苯氧基）-1,3,5-三嗪在将分子连接在一起的反应中组合制备的。该物质可以很好地吸附As（III），并且具有出色的品质，例如易于再次使用，单独的物质，过滤掉液体。在pH=8和室温下，TFPOTDB-SO3H吸附了大量的As(III)。它在10min内达到了97.1％的去除率，可以吸附高达344.8mg/g。进行了一项研究，以研究共存阴离子对砷的消除作用。研究结果表明，阴离子的存在具有最小的不利影响，减少As(III)摄取约1-7%。发现吸收过程的动力学受准二级动力学模型控制，而Langmuir等温线模型验证了As（III）去除的机制是单层化学吸附。根据热力学分析,吸附过程是吸热的，自发发生。此外，即使经过4个连续的吸附-解吸循环，吸附剂对As（III）保留了88.86％的大量吸收生产率。结果共同表明，TFPOTDB-SO3H对于有效吸附和消除废水中的As（III）离子具有相当大的希望。
