background: the rapid increase in agricultural and industrial development has made heavy metal pollution a serious environmental problem and public health threat; therefore, removal of heavy metals from water is important. the current study prepared dnph@sds@fe3o4 nanoparticles as a novel and effective adsorbent for removal of hg(ii) ions from an aqueous solution. methods: a selective adsorbent...

At this work, removal of Pb (II) using Lawsonia inermis (Henna) was studied. In recent years, use of low price adsorbent is taken into consideration. Adsorption experiments were performed in batch system at ambient temperature (25℃). The influence of some parameters such as time, initial metal concentration, pH and adsorbent dose were investigated. The optimum conditions was obtained at pH of 6...

The present research describes the performance of NiO NPs/Ag-clinoptilolite composite adsorbent for the removal of uranium (U(VI)) ions from drinking water of Dezful city-Iran. Prior to the experiment reactions, Na-clinoptilolite was chemically treated with NaCl, Silver ions (Ag+) and subsequently Nickel (NiO) NPs to prepare NiO NPs/Ag-clinoptilolite. The samples were characterized by SEM, AAS,...

in this work, efficiency and performance of hazelnut shells (hs) adsorbent was examined for the removal and recovery of direct red 12b (dr12b) from wastewater. the absorbance of dr12b was measured spectrophotometrically at λmax=523 nm before and after adsorption of dr12b. the maximum removal was 99.8% for 30 mg l –1 ofdr12b concentration on 0.3 gr hs adsorbent. acidic ph was favourable for the ...

the aim of this study is to investigate the nitrate adsorption on granular ferric hydroxide (gfh). the effect of factors such as initial concentration of nitrate, ph, contact time, and adsorbent mass were determined. the study was done in laboratory–scale in which synthetic nitrate solutions in a batch reactor were placed in contact with the adsorbent to model adsorption kinetics. it was found ...

in this work, we developed a method which combined the processes of acid-leaching, ammonium jarosite precipitating and electro-depositing to recover copper and nickel from electroplating sludge. residual sludge from an electroplating plant located in qingdao was used for acid-leaching, and more than 95% of copper, nickel, zinc, chromium and iron were extracted from the sludge. after acid-leachi...

In this study removal of nickel(II) from aqueous solutions by adsorption on to Palmyra palm fruit seed carbon (PPFSC) and commercial activated carbon (CAC) was investigated as a function of agitation time, pH, and carbon dosage on the adsorption capacity has been studied. The metal adsorption yields increased with the increasing adsorbent dosage and contact time and reached to equilibrium for b...

Nickel (Ni) as a heavy metal due to its toxicity should be removed from wastewater and aquatic environments  using  efficient  technology.  The  aim  of this  study  was  to  remove  Ni  from  an aqueous  solution  using  palm  leaf  ash  produced  in  a  furnace.  To  do  so,  kinetic  and thermodynamic experiments were conducted on the adsorption process. Moreover, the effect of time, pH, ads...

Activated carbon prepared from neem oilcake, by pyrolysis accompanied with microwave oven activation is evaluated for the adsorption of Cd(II) and Ni(II) from wastewater. Parameters such as pH, agitation time, metal ion concentration and adsorbent dose are studied. The percent removal increased with pH from 2.0 to 7.0. The adsorption data fit well with Langmuir, Freundlich and Temkin isotherm m...

Introduction: Nickel is found in varies industrial processes such as electroplating, leather tanning, cement preservations, paints and pigments, textile, steel fabrication and canning industries. It is proved that Ni(II) has several health hazards such as carcinogenic. The aim of this study was the evaluation of Ni(II)adsorption on Apple peel granola from aqueous solution. Material and Methods:...