Heavy Metal Removal Efficiency of Paper Mulberry Biochar and Commercially Available Silica Powder from Simulated Industrial Wastewater

iranica journal of energy and environment Pub Date : 2014-10-01 DOI:10.5829/idosi.ijee.2014.05.04.12

Sawaira Adil, A. Mashiatullah, Maliha Asma, Jawaria Abid, A. Ghaffar

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引用次数: 9

Abstract

Paper mulberry bio-char produced was characterized and evaluated for heavy metals removal from simulated industrial wastewater in compare to silica powder. The batch adsorption study was conducted under different conditions like, the effects of solution pH, contact time and temperature. The paper mulberry bio-char (PMB) was more effective and exhibited a higher adsorption potential for cadmium, copper, chromium, lead and zinc than commercially available silica powder. Experiments conducted with an initial metal concentration of 50 mg/l at pH 2, 4, 8, 12. Maximum removal of cadmium, copper, chromium, lead and zinc by PMB was higher than silica powder. Contact time of 2, 3, 4 h showed maximum removal of cadmium, copper, chromium, lead and zinc removal for PMB and was found higher than that of silica powder. The thermodynamic parameters such as G°, H° and S° were calculated for predicting the nature of sorption. The results showed that plant-residue bio-char can act as effective alternative sorbent instead of silica powder for the removal of heavy metal ions from industrial wastewater.

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造纸桑生物炭和市售硅粉对模拟工业废水中重金属的去除效果

对造纸桑树生物炭与硅粉对模拟工业废水中重金属的去除效果进行了表征和评价。在不同条件下，如溶液pH、接触时间和温度的影响下，进行了间歇吸附研究。纸桑生物炭(PMB)对镉、铜、铬、铅和锌的吸附效果优于市售硅粉。实验中，初始金属浓度为50 mg/l, pH值为2,4,8,12。PMB对镉、铜、铬、铅、锌的最大去除率高于硅粉。接触时间为2、3、4 h时，PMB对镉、铜、铬、铅、锌的去除率最高，且高于二氧化硅粉。通过计算G°、H°和S°等热力学参数来预测吸附性质。结果表明，植物渣生物炭可作为工业废水中重金属离子的有效替代吸附剂。

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iranica journal of energy and environment

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