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Detoxification of Cadmium from Industrial Effluents Using Solid Waste Generated After sea Nodule Processing

机译：利用海结节加工后产生的固体废物从工业污水中解毒

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This paper deals with studies on the utilization of a solid waste generated during the recovery of copper, nickel and cobalt form polymetallic manganese nodules from Indian ocean, for the detoxification of industrial effluents/waste waters from cadmium for its safe disposal to the river or land. The influence of various parameters such as contact time, solution pH, and initial metal concentration in solution, temperature and adsorbent quantity, on cadmium removal were studied. The linear forms of the Langmuir and Freundlich equations were utilized for experiments with metal concentrations of 200mg/l for Cd(II) as functions of solution pH (2.0–6.0). First order rate equation and pseudo second order rate equations were applied to study adsorption kinetics. The adsorption capacity of sea nodule residue(SNR) was found to be 19.8mg of Cd /g of SNR. Under the optimized conditions cadmium level was brought down from 100ppm to nil and 200ppm to 2ppm making wastewater safe for disposal. Desorption studies were also performed to see the elution of cadmium from the loaded adsorbent from the point of view of its recycling/safe disposal with or without treatment.
机译：这对从印度洋铜，镍和钴的形式多金属锰结核的恢复过程中产生的，对工业废水的解毒固体废物的利用研究，从镉/废水其安全处置的河流或土地纸交易。研究了各种参数，例如接触时间，溶液pH和初始金属浓度在溶液，温度和吸附量，镉去除中的影响。 Langmuir和Freundlich方程的线性形式用于溶液pH（2.0-6.0）的函数的CD（II）的金属浓度的实验。应用一阶速率方程和伪二阶率方程用于研究吸附动力学。发现海结节残留物（SNR）的吸附能力为19.8mg CD / g的SNR。根据优化的条件，镉水平从100ppm达到零，200ppm到2ppm，使废水安全地处理。还表演了解吸研究，以从其回收/安全处理的观点来看，从加载的吸附剂的洗脱，有或没有治疗。

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