Pollution Ecology Research Laboratory, Department of Botany, Banaras Hindu University, Varanasi 221005, India.
Centre for Environmental Science and Technology, Banaras Hindu University, Varanasi 221005, India.
Ecotoxicol Environ Saf. 2015 Feb;112:80-6. doi: 10.1016/j.ecoenv.2014.10.034. Epub 2014 Nov 7.
A cost-effective and promising technology has been demonstrated for the removal of copper (Cu), cadmium (Cd), chromium (Cr), nickel (Ni), iron (Fe), lead (Pb) and zinc (Zn) from urban sewage mixed with industrial effluents within 14 days. With the help of P. australis and T. latifolia grown alone and in combination batch experiments were designed to assess the removal of heavy metals from the wastewater collected from 5 sampling stations. The results revealed that P. australis performed better than T. latifolia for Cu, Cd, Cr, Ni, Fe, Pb and Zn removal, while mixing of the plant species further enhanced the removal of Cu to 78.0±1.2%, Cd to 60.0±1.2%, Cr to 68.1±0.4%, Ni to 73.8±0.6%, Fe to 80.1±0.3%, Pb to 61.0±1.2% and Zn to 61.0±1.2% for wastewater samples from Raj Ghat. Negative correlation coefficients of Cu, Cd, Cr, Ni, Fe, Pb and Zn concentrations in wastewater with the retention time revealed that there was an increase in the heavy metal removal rate with retention time. P. australis showed higher accumulative capacities for Cu, Cd, Cr, Ni and Fe than T. latifolia. P. australis and T. latifolia grown in combination can be used for the removal of Cu, Cd, Cr, Ni, Fe, Pb and Zn from the urban sewage mixed with industrial effluents within 14 days.
一种具有成本效益和广阔前景的技术已被证明可以在 14 天内从城市污水和工业废水混合中去除铜(Cu)、镉(Cd)、铬(Cr)、镍(Ni)、铁(Fe)、铅(Pb)和锌(Zn)。在单独和组合的满江红和凤眼蓝批量实验的帮助下,设计了从 5 个采样站收集的废水中去除重金属的实验。结果表明,满江红在去除 Cu、Cd、Cr、Ni、Fe、Pb 和 Zn 方面的表现优于凤眼蓝,而植物物种的混合进一步提高了对 Cu 的去除率,达到 78.0±1.2%,对 Cd 的去除率为 60.0±1.2%,对 Cr 的去除率为 68.1±0.4%,对 Ni 的去除率为 73.8±0.6%,对 Fe 的去除率为 80.1±0.3%,对 Pb 的去除率为 61.0±1.2%,对 Zn 的去除率为 61.0±1.2%,Raj Ghat 的废水样本。废水中 Cu、Cd、Cr、Ni、Fe 和 Zn 浓度与保留时间的负相关系数表明,重金属去除率随保留时间的增加而增加。满江红对 Cu、Cd、Cr、Ni 和 Fe 的累积容量高于凤眼蓝。满江红和凤眼蓝的组合可以用于在 14 天内从城市污水和工业废水混合中去除 Cu、Cd、Cr、Ni、Fe、Pb 和 Zn。